diff --git a/apps/api/src/domain/sponsor/SponsorController.ts b/apps/api/src/domain/sponsor/SponsorController.ts
index d47641838..44b92ab3f 100644
--- a/apps/api/src/domain/sponsor/SponsorController.ts
+++ b/apps/api/src/domain/sponsor/SponsorController.ts
@@ -1,4 +1,4 @@
-import { Controller, Get, Post, Body, HttpCode, HttpStatus, Param, Query } from '@nestjs/common';
+import { Controller, Get, Post, Put, Body, HttpCode, HttpStatus, Param, Query } from '@nestjs/common';
 import { ApiTags, ApiResponse, ApiOperation } from '@nestjs/swagger';
 import { SponsorService } from './SponsorService';
 import { GetEntitySponsorshipPricingResultDTO } from './dtos/GetEntitySponsorshipPricingResultDTO';
@@ -13,6 +13,16 @@ import { GetSponsorOutputDTO } from './dtos/GetSponsorOutputDTO';
 import { GetPendingSponsorshipRequestsOutputDTO } from './dtos/GetPendingSponsorshipRequestsOutputDTO';
 import { AcceptSponsorshipRequestInputDTO } from './dtos/AcceptSponsorshipRequestInputDTO';
 import { RejectSponsorshipRequestInputDTO } from './dtos/RejectSponsorshipRequestInputDTO';
+import { PaymentMethodDTO } from './dtos/PaymentMethodDTO';
+import { InvoiceDTO } from './dtos/InvoiceDTO';
+import { BillingStatsDTO } from './dtos/BillingStatsDTO';
+import { AvailableLeagueDTO } from './dtos/AvailableLeagueDTO';
+import { LeagueDetailDTO } from './dtos/LeagueDetailDTO';
+import { DriverDTO } from './dtos/DriverDTO';
+import { RaceDTO } from './dtos/RaceDTO';
+import { SponsorProfileDTO } from './dtos/SponsorProfileDTO';
+import { NotificationSettingsDTO } from './dtos/NotificationSettingsDTO';
+import { PrivacySettingsDTO } from './dtos/PrivacySettingsDTO';
 import type { AcceptSponsorshipRequestResultPort } from '@core/racing/application/ports/output/AcceptSponsorshipRequestResultPort';
 import type { RejectSponsorshipRequestResultDTO } from '@core/racing/application/use-cases/RejectSponsorshipRequestUseCase';
 
@@ -93,4 +103,59 @@ export class SponsorController {
    async rejectSponsorshipRequest(@Param('requestId') requestId: string, @Body() input: RejectSponsorshipRequestInputDTO): Promise<RejectSponsorshipRequestResultDTO | null> {
      return this.sponsorService.rejectSponsorshipRequest(requestId, input.respondedBy, input.reason);
    }
+
+   @Get('billing/:sponsorId')
+   @ApiOperation({ summary: 'Get sponsor billing information' })
+   @ApiResponse({ status: 200, description: 'Sponsor billing data', type: Object })
+   async getSponsorBilling(@Param('sponsorId') sponsorId: string): Promise<{
+     paymentMethods: PaymentMethodDTO[];
+     invoices: InvoiceDTO[];
+     stats: BillingStatsDTO;
+   }> {
+     return this.sponsorService.getSponsorBilling(sponsorId);
+   }
+
+   @Get('leagues/available')
+   @ApiOperation({ summary: 'Get available leagues for sponsorship' })
+   @ApiResponse({ status: 200, description: 'Available leagues', type: [AvailableLeagueDTO] })
+   async getAvailableLeagues(): Promise<AvailableLeagueDTO[]> {
+     return this.sponsorService.getAvailableLeagues();
+   }
+
+   @Get('leagues/:leagueId/detail')
+   @ApiOperation({ summary: 'Get detailed league information for sponsors' })
+   @ApiResponse({ status: 200, description: 'League detail data', type: Object })
+   async getLeagueDetail(@Param('leagueId') leagueId: string): Promise<{
+     league: LeagueDetailDTO;
+     drivers: DriverDTO[];
+     races: RaceDTO[];
+   }> {
+     return this.sponsorService.getLeagueDetail(leagueId);
+   }
+
+   @Get('settings/:sponsorId')
+   @ApiOperation({ summary: 'Get sponsor settings' })
+   @ApiResponse({ status: 200, description: 'Sponsor settings', type: Object })
+   async getSponsorSettings(@Param('sponsorId') sponsorId: string): Promise<{
+     profile: SponsorProfileDTO;
+     notifications: NotificationSettingsDTO;
+     privacy: PrivacySettingsDTO;
+   }> {
+     return this.sponsorService.getSponsorSettings(sponsorId);
+   }
+
+   @Put('settings/:sponsorId')
+   @HttpCode(HttpStatus.OK)
+   @ApiOperation({ summary: 'Update sponsor settings' })
+   @ApiResponse({ status: 200, description: 'Settings updated successfully' })
+   async updateSponsorSettings(
+     @Param('sponsorId') sponsorId: string,
+     @Body() input: {
+       profile?: Partial<SponsorProfileDTO>;
+       notifications?: Partial<NotificationSettingsDTO>;
+       privacy?: Partial<PrivacySettingsDTO>;
+     }
+   ): Promise<void> {
+     return this.sponsorService.updateSponsorSettings(sponsorId, input);
+   }
 }
diff --git a/apps/api/src/domain/sponsor/SponsorProviders.ts b/apps/api/src/domain/sponsor/SponsorProviders.ts
index f384b9a0c..2ca817311 100644
--- a/apps/api/src/domain/sponsor/SponsorProviders.ts
+++ b/apps/api/src/domain/sponsor/SponsorProviders.ts
@@ -13,10 +13,11 @@ import { ISponsorshipRequestRepository } from '@core/racing/domain/repositories/
 import { INotificationService } from '@core/notifications/application/ports/INotificationService';
 import { IPaymentGateway } from '@core/racing/application/ports/IPaymentGateway';
 import { IWalletRepository } from '@core/payments/domain/repositories/IWalletRepository';
+import type { IPaymentRepository } from '@core/payments/domain/repositories/IPaymentRepository';
 import { ILeagueWalletRepository } from '@core/racing/domain/repositories/ILeagueWalletRepository';
 import type { Logger } from '@core/shared/application';
 
-// Import use cases
+// Import use cases / application services
 import { GetSponsorshipPricingUseCase } from '@core/racing/application/use-cases/GetSponsorshipPricingUseCase';
 import { GetSponsorsUseCase } from '@core/racing/application/use-cases/GetSponsorsUseCase';
 import { CreateSponsorUseCase } from '@core/racing/application/use-cases/CreateSponsorUseCase';
@@ -27,6 +28,7 @@ import { GetSponsorUseCase } from '@core/racing/application/use-cases/GetSponsor
 import { GetPendingSponsorshipRequestsUseCase } from '@core/racing/application/use-cases/GetPendingSponsorshipRequestsUseCase';
 import { AcceptSponsorshipRequestUseCase } from '@core/racing/application/use-cases/AcceptSponsorshipRequestUseCase';
 import { RejectSponsorshipRequestUseCase } from '@core/racing/application/use-cases/RejectSponsorshipRequestUseCase';
+import { SponsorBillingService } from '@core/payments/application/services/SponsorBillingService';
 
 // Import concrete in-memory implementations
 import { InMemorySponsorRepository } from '@adapters/racing/persistence/inmemory/InMemorySponsorRepository';
@@ -37,6 +39,7 @@ import { InMemoryLeagueMembershipRepository } from '@adapters/racing/persistence
 import { InMemoryRaceRepository } from '@adapters/racing/persistence/inmemory/InMemoryRaceRepository';
 import { InMemorySponsorshipPricingRepository } from '@adapters/racing/persistence/inmemory/InMemorySponsorshipPricingRepository';
 import { InMemorySponsorshipRequestRepository } from '@adapters/racing/persistence/inmemory/InMemorySponsorshipRequestRepository';
+import { InMemoryPaymentRepository } from '@adapters/payments/persistence/inmemory/InMemoryPaymentRepository';
 import { ConsoleLogger } from '@adapters/logging/ConsoleLogger';
 
 // Define injection tokens
@@ -50,7 +53,7 @@ export const SPONSORSHIP_PRICING_REPOSITORY_TOKEN = 'ISponsorshipPricingReposito
 export const SPONSORSHIP_REQUEST_REPOSITORY_TOKEN = 'ISponsorshipRequestRepository';
 export const LOGGER_TOKEN = 'Logger';
 
-// Use case tokens
+// Use case / application service tokens
 export const GET_SPONSORSHIP_PRICING_USE_CASE_TOKEN = 'GetSponsorshipPricingUseCase';
 export const GET_SPONSORS_USE_CASE_TOKEN = 'GetSponsorsUseCase';
 export const CREATE_SPONSOR_USE_CASE_TOKEN = 'CreateSponsorUseCase';
@@ -61,6 +64,7 @@ export const GET_SPONSOR_USE_CASE_TOKEN = 'GetSponsorUseCase';
 export const GET_PENDING_SPONSORSHIP_REQUESTS_USE_CASE_TOKEN = 'GetPendingSponsorshipRequestsUseCase';
 export const ACCEPT_SPONSORSHIP_REQUEST_USE_CASE_TOKEN = 'AcceptSponsorshipRequestUseCase';
 export const REJECT_SPONSORSHIP_REQUEST_USE_CASE_TOKEN = 'RejectSponsorshipRequestUseCase';
+export const SPONSOR_BILLING_SERVICE_TOKEN = 'SponsorBillingService';
 
 export const SponsorProviders: Provider[] = [
   SponsorService,
@@ -133,9 +137,28 @@ export const SponsorProviders: Provider[] = [
   },
   {
     provide: GET_SPONSOR_SPONSORSHIPS_USE_CASE_TOKEN,
-    useFactory: (sponsorRepo: ISponsorRepository, seasonSponsorshipRepo: ISeasonSponsorshipRepository, seasonRepo: ISeasonRepository, raceRepo: IRaceRepository) =>
-      new GetSponsorSponsorshipsUseCase(sponsorRepo, seasonSponsorshipRepo, seasonRepo, raceRepo),
-    inject: [SPONSOR_REPOSITORY_TOKEN, SEASON_SPONSORSHIP_REPOSITORY_TOKEN, SEASON_REPOSITORY_TOKEN, RACE_REPOSITORY_TOKEN],
+    useFactory: (
+      sponsorRepo: ISponsorRepository,
+      seasonSponsorshipRepo: ISeasonSponsorshipRepository,
+      seasonRepo: ISeasonRepository,
+      leagueRepo: ILeagueRepository,
+      leagueMembershipRepo: ILeagueMembershipRepository,
+      raceRepo: IRaceRepository,
+    ) => new GetSponsorSponsorshipsUseCase(sponsorRepo, seasonSponsorshipRepo, seasonRepo, leagueRepo, leagueMembershipRepo, raceRepo),
+    inject: [
+      SPONSOR_REPOSITORY_TOKEN,
+      SEASON_SPONSORSHIP_REPOSITORY_TOKEN,
+      SEASON_REPOSITORY_TOKEN,
+      LEAGUE_REPOSITORY_TOKEN,
+      LEAGUE_MEMBERSHIP_REPOSITORY_TOKEN,
+      RACE_REPOSITORY_TOKEN,
+    ],
+  },
+  {
+    provide: SPONSOR_BILLING_SERVICE_TOKEN,
+    useFactory: (paymentRepo: IPaymentRepository, seasonSponsorshipRepo: ISeasonSponsorshipRepository) =>
+      new SponsorBillingService(paymentRepo, seasonSponsorshipRepo),
+    inject: ['IPaymentRepository', SEASON_SPONSORSHIP_REPOSITORY_TOKEN],
   },
   {
     provide: GET_ENTITY_SPONSORSHIP_PRICING_USE_CASE_TOKEN,
diff --git a/apps/api/src/domain/sponsor/SponsorService.ts b/apps/api/src/domain/sponsor/SponsorService.ts
index 7896bba95..61dd5780e 100644
--- a/apps/api/src/domain/sponsor/SponsorService.ts
+++ b/apps/api/src/domain/sponsor/SponsorService.ts
@@ -11,6 +11,16 @@ import { GetSponsorOutputDTO } from './dtos/GetSponsorOutputDTO';
 import { GetPendingSponsorshipRequestsOutputDTO } from './dtos/GetPendingSponsorshipRequestsOutputDTO';
 import { AcceptSponsorshipRequestInputDTO } from './dtos/AcceptSponsorshipRequestInputDTO';
 import { RejectSponsorshipRequestInputDTO } from './dtos/RejectSponsorshipRequestInputDTO';
+import { PaymentMethodDTO } from './dtos/PaymentMethodDTO';
+import { InvoiceDTO } from './dtos/InvoiceDTO';
+import { BillingStatsDTO } from './dtos/BillingStatsDTO';
+import { AvailableLeagueDTO } from './dtos/AvailableLeagueDTO';
+import { LeagueDetailDTO } from './dtos/LeagueDetailDTO';
+import { DriverDTO } from './dtos/DriverDTO';
+import { RaceDTO } from './dtos/RaceDTO';
+import { SponsorProfileDTO } from './dtos/SponsorProfileDTO';
+import { NotificationSettingsDTO } from './dtos/NotificationSettingsDTO';
+import { PrivacySettingsDTO } from './dtos/PrivacySettingsDTO';
 
 // Use cases
 import { GetSponsorshipPricingUseCase } from '@core/racing/application/use-cases/GetSponsorshipPricingUseCase';
@@ -144,4 +154,259 @@ export class SponsorService {
     }
     return result.value;
   }
+
+  async getSponsorBilling(sponsorId: string): Promise<{
+    paymentMethods: PaymentMethodDTO[];
+    invoices: InvoiceDTO[];
+    stats: BillingStatsDTO;
+  }> {
+    this.logger.debug('[SponsorService] Fetching sponsor billing.', { sponsorId });
+
+    // Mock data - in real implementation, this would come from repositories
+    const paymentMethods: PaymentMethodDTO[] = [
+      {
+        id: 'pm-1',
+        type: 'card',
+        last4: '4242',
+        brand: 'Visa',
+        isDefault: true,
+        expiryMonth: 12,
+        expiryYear: 2027,
+      },
+      {
+        id: 'pm-2',
+        type: 'card',
+        last4: '5555',
+        brand: 'Mastercard',
+        isDefault: false,
+        expiryMonth: 6,
+        expiryYear: 2026,
+      },
+      {
+        id: 'pm-3',
+        type: 'sepa',
+        last4: '8901',
+        bankName: 'Deutsche Bank',
+        isDefault: false,
+      },
+    ];
+
+    const invoices: InvoiceDTO[] = [
+      {
+        id: 'inv-1',
+        invoiceNumber: 'GP-2025-001234',
+        date: '2025-11-01',
+        dueDate: '2025-11-15',
+        amount: 1090.91,
+        vatAmount: 207.27,
+        totalAmount: 1298.18,
+        status: 'paid',
+        description: 'GT3 Pro Championship - Primary Sponsor (Q4 2025)',
+        sponsorshipType: 'league',
+        pdfUrl: '#',
+      },
+      {
+        id: 'inv-2',
+        invoiceNumber: 'GP-2025-001235',
+        date: '2025-10-01',
+        dueDate: '2025-10-15',
+        amount: 363.64,
+        vatAmount: 69.09,
+        totalAmount: 432.73,
+        status: 'paid',
+        description: 'Team Velocity - Gear Sponsor (Q4 2025)',
+        sponsorshipType: 'team',
+        pdfUrl: '#',
+      },
+      {
+        id: 'inv-3',
+        invoiceNumber: 'GP-2025-001236',
+        date: '2025-12-01',
+        dueDate: '2025-12-15',
+        amount: 318.18,
+        vatAmount: 60.45,
+        totalAmount: 378.63,
+        status: 'pending',
+        description: 'Alex Thompson - Driver Sponsorship (Dec 2025)',
+        sponsorshipType: 'driver',
+        pdfUrl: '#',
+      },
+    ];
+
+    const stats: BillingStatsDTO = {
+      totalSpent: 12450,
+      pendingAmount: 919.54,
+      nextPaymentDate: '2025-12-15',
+      nextPaymentAmount: 378.63,
+      activeSponsorships: 6,
+      averageMonthlySpend: 2075,
+    };
+
+    return { paymentMethods, invoices, stats };
+  }
+
+  async getAvailableLeagues(): Promise<AvailableLeagueDTO[]> {
+    this.logger.debug('[SponsorService] Fetching available leagues.');
+
+    // Mock data
+    return [
+      {
+        id: 'league-1',
+        name: 'GT3 Masters Championship',
+        game: 'iRacing',
+        drivers: 48,
+        avgViewsPerRace: 8200,
+        mainSponsorSlot: { available: true, price: 1200 },
+        secondarySlots: { available: 1, total: 2, price: 400 },
+        rating: 4.8,
+        tier: 'premium',
+        nextRace: '2025-12-20',
+        seasonStatus: 'active',
+        description: 'Premier GT3 racing with top-tier drivers. Weekly broadcasts and active community.',
+      },
+      {
+        id: 'league-2',
+        name: 'Endurance Pro Series',
+        game: 'ACC',
+        drivers: 72,
+        avgViewsPerRace: 12500,
+        mainSponsorSlot: { available: false, price: 1500 },
+        secondarySlots: { available: 2, total: 2, price: 500 },
+        rating: 4.9,
+        tier: 'premium',
+        nextRace: '2026-01-05',
+        seasonStatus: 'active',
+        description: 'Multi-class endurance racing. High engagement from dedicated endurance fans.',
+      },
+    ];
+  }
+
+  async getLeagueDetail(leagueId: string): Promise<{
+    league: LeagueDetailDTO;
+    drivers: DriverDTO[];
+    races: RaceDTO[];
+  }> {
+    this.logger.debug('[SponsorService] Fetching league detail.', { leagueId });
+
+    // Mock data
+    const league: LeagueDetailDTO = {
+      id: leagueId,
+      name: 'GT3 Masters Championship',
+      game: 'iRacing',
+      tier: 'premium',
+      season: 'Season 3',
+      description: 'Premier GT3 racing with top-tier drivers competing across the world\'s most iconic circuits.',
+      drivers: 48,
+      races: 12,
+      completedRaces: 8,
+      totalImpressions: 45200,
+      avgViewsPerRace: 5650,
+      engagement: 4.2,
+      rating: 4.8,
+      seasonStatus: 'active',
+      seasonDates: { start: '2025-10-01', end: '2026-02-28' },
+      nextRace: { name: 'Spa-Francorchamps', date: '2025-12-20' },
+      sponsorSlots: {
+        main: {
+          available: true,
+          price: 1200,
+          benefits: [
+            'Primary logo placement on all liveries',
+            'League page header banner',
+            'Race results page branding',
+            'Social media feature posts',
+            'Newsletter sponsor spot',
+          ]
+        },
+        secondary: {
+          available: 1,
+          total: 2,
+          price: 400,
+          benefits: [
+            'Secondary logo on liveries',
+            'League page sidebar placement',
+            'Race results mention',
+            'Social media mentions',
+          ]
+        },
+      },
+    };
+
+    const drivers: DriverDTO[] = [
+      { id: 'd1', name: 'Max Verstappen', country: 'NL', position: 1, races: 8, impressions: 4200, team: 'Red Bull Racing' },
+      { id: 'd2', name: 'Lewis Hamilton', country: 'GB', position: 2, races: 8, impressions: 3980, team: 'Mercedes AMG' },
+    ];
+
+    const races: RaceDTO[] = [
+      { id: 'r1', name: 'Spa-Francorchamps', date: '2025-12-20', views: 0, status: 'upcoming' },
+      { id: 'r2', name: 'Monza', date: '2025-12-08', views: 5800, status: 'completed' },
+    ];
+
+    return { league, drivers, races };
+  }
+
+  async getSponsorSettings(sponsorId: string): Promise<{
+    profile: SponsorProfileDTO;
+    notifications: NotificationSettingsDTO;
+    privacy: PrivacySettingsDTO;
+  }> {
+    this.logger.debug('[SponsorService] Fetching sponsor settings.', { sponsorId });
+
+    // Mock data
+    const profile: SponsorProfileDTO = {
+      companyName: 'Acme Racing Co.',
+      contactName: 'John Smith',
+      contactEmail: 'sponsor@acme-racing.com',
+      contactPhone: '+1 (555) 123-4567',
+      website: 'https://acme-racing.com',
+      description: 'Premium sim racing equipment and accessories for competitive drivers.',
+      logoUrl: null,
+      industry: 'Racing Equipment',
+      address: {
+        street: '123 Racing Boulevard',
+        city: 'Indianapolis',
+        country: 'United States',
+        postalCode: '46222',
+      },
+      taxId: 'US12-3456789',
+      socialLinks: {
+        twitter: '@acmeracing',
+        linkedin: 'acme-racing-co',
+        instagram: '@acmeracing',
+      },
+    };
+
+    const notifications: NotificationSettingsDTO = {
+      emailNewSponsorships: true,
+      emailWeeklyReport: true,
+      emailRaceAlerts: false,
+      emailPaymentAlerts: true,
+      emailNewOpportunities: true,
+      emailContractExpiry: true,
+    };
+
+    const privacy: PrivacySettingsDTO = {
+      publicProfile: true,
+      showStats: false,
+      showActiveSponsorships: true,
+      allowDirectContact: true,
+    };
+
+    return { profile, notifications, privacy };
+  }
+
+  async updateSponsorSettings(
+    sponsorId: string,
+    input: {
+      profile?: Partial<SponsorProfileDTO>;
+      notifications?: Partial<NotificationSettingsDTO>;
+      privacy?: Partial<PrivacySettingsDTO>;
+    }
+  ): Promise<void> {
+    this.logger.debug('[SponsorService] Updating sponsor settings.', { sponsorId, input });
+
+    // Mock implementation - in real app, this would persist to database
+    // For now, just log the update
+    this.logger.info('[SponsorService] Settings updated successfully.', { sponsorId });
+  }
 }
diff --git a/apps/api/src/domain/sponsor/dtos/ActivityItemDTO.ts b/apps/api/src/domain/sponsor/dtos/ActivityItemDTO.ts
new file mode 100644
index 000000000..8fd97e102
--- /dev/null
+++ b/apps/api/src/domain/sponsor/dtos/ActivityItemDTO.ts
@@ -0,0 +1,25 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsString, IsEnum, IsOptional, IsNumber } from 'class-validator';
+
+export class ActivityItemDTO {
+  @ApiProperty()
+  @IsString()
+  id: string;
+
+  @ApiProperty({ enum: ['race', 'league', 'team', 'driver', 'platform'] })
+  @IsEnum(['race', 'league', 'team', 'driver', 'platform'])
+  type: 'race' | 'league' | 'team' | 'driver' | 'platform';
+
+  @ApiProperty()
+  @IsString()
+  message: string;
+
+  @ApiProperty()
+  @IsString()
+  time: string;
+
+  @ApiProperty({ required: false })
+  @IsOptional()
+  @IsNumber()
+  impressions?: number;
+}
\ No newline at end of file
diff --git a/apps/api/src/domain/sponsor/dtos/AvailableLeagueDTO.ts b/apps/api/src/domain/sponsor/dtos/AvailableLeagueDTO.ts
new file mode 100644
index 000000000..b72738dac
--- /dev/null
+++ b/apps/api/src/domain/sponsor/dtos/AvailableLeagueDTO.ts
@@ -0,0 +1,58 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsString, IsEnum, IsNumber, IsBoolean, IsOptional, IsDateString } from 'class-validator';
+
+export class AvailableLeagueDTO {
+  @ApiProperty()
+  @IsString()
+  id: string;
+
+  @ApiProperty()
+  @IsString()
+  name: string;
+
+  @ApiProperty()
+  @IsString()
+  game: string;
+
+  @ApiProperty()
+  @IsNumber()
+  drivers: number;
+
+  @ApiProperty()
+  @IsNumber()
+  avgViewsPerRace: number;
+
+  @ApiProperty({ type: Object })
+  mainSponsorSlot: {
+    available: boolean;
+    price: number;
+  };
+
+  @ApiProperty({ type: Object })
+  secondarySlots: {
+    available: number;
+    total: number;
+    price: number;
+  };
+
+  @ApiProperty()
+  @IsNumber()
+  rating: number;
+
+  @ApiProperty({ enum: ['premium', 'standard', 'starter'] })
+  @IsEnum(['premium', 'standard', 'starter'])
+  tier: 'premium' | 'standard' | 'starter';
+
+  @ApiProperty({ required: false })
+  @IsOptional()
+  @IsDateString()
+  nextRace?: string;
+
+  @ApiProperty({ enum: ['active', 'upcoming', 'completed'] })
+  @IsEnum(['active', 'upcoming', 'completed'])
+  seasonStatus: 'active' | 'upcoming' | 'completed';
+
+  @ApiProperty()
+  @IsString()
+  description: string;
+}
\ No newline at end of file
diff --git a/apps/api/src/domain/sponsor/dtos/BillingStatsDTO.ts b/apps/api/src/domain/sponsor/dtos/BillingStatsDTO.ts
new file mode 100644
index 000000000..48e593968
--- /dev/null
+++ b/apps/api/src/domain/sponsor/dtos/BillingStatsDTO.ts
@@ -0,0 +1,28 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsNumber, IsDateString } from 'class-validator';
+
+export class BillingStatsDTO {
+  @ApiProperty()
+  @IsNumber()
+  totalSpent: number;
+
+  @ApiProperty()
+  @IsNumber()
+  pendingAmount: number;
+
+  @ApiProperty()
+  @IsDateString()
+  nextPaymentDate: string;
+
+  @ApiProperty()
+  @IsNumber()
+  nextPaymentAmount: number;
+
+  @ApiProperty()
+  @IsNumber()
+  activeSponsorships: number;
+
+  @ApiProperty()
+  @IsNumber()
+  averageMonthlySpend: number;
+}
\ No newline at end of file
diff --git a/apps/api/src/domain/sponsor/dtos/DriverDTO.ts b/apps/api/src/domain/sponsor/dtos/DriverDTO.ts
new file mode 100644
index 000000000..d7c240c43
--- /dev/null
+++ b/apps/api/src/domain/sponsor/dtos/DriverDTO.ts
@@ -0,0 +1,32 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsString, IsNumber } from 'class-validator';
+
+export class DriverDTO {
+  @ApiProperty()
+  @IsString()
+  id: string;
+
+  @ApiProperty()
+  @IsString()
+  name: string;
+
+  @ApiProperty()
+  @IsString()
+  country: string;
+
+  @ApiProperty()
+  @IsNumber()
+  position: number;
+
+  @ApiProperty()
+  @IsNumber()
+  races: number;
+
+  @ApiProperty()
+  @IsNumber()
+  impressions: number;
+
+  @ApiProperty()
+  @IsString()
+  team: string;
+}
\ No newline at end of file
diff --git a/apps/api/src/domain/sponsor/dtos/InvoiceDTO.ts b/apps/api/src/domain/sponsor/dtos/InvoiceDTO.ts
new file mode 100644
index 000000000..63a7df77e
--- /dev/null
+++ b/apps/api/src/domain/sponsor/dtos/InvoiceDTO.ts
@@ -0,0 +1,48 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsString, IsEnum, IsNumber, IsDateString } from 'class-validator';
+
+export class InvoiceDTO {
+  @ApiProperty()
+  @IsString()
+  id: string;
+
+  @ApiProperty()
+  @IsString()
+  invoiceNumber: string;
+
+  @ApiProperty()
+  @IsDateString()
+  date: string;
+
+  @ApiProperty()
+  @IsDateString()
+  dueDate: string;
+
+  @ApiProperty()
+  @IsNumber()
+  amount: number;
+
+  @ApiProperty()
+  @IsNumber()
+  vatAmount: number;
+
+  @ApiProperty()
+  @IsNumber()
+  totalAmount: number;
+
+  @ApiProperty({ enum: ['paid', 'pending', 'overdue', 'failed'] })
+  @IsEnum(['paid', 'pending', 'overdue', 'failed'])
+  status: 'paid' | 'pending' | 'overdue' | 'failed';
+
+  @ApiProperty()
+  @IsString()
+  description: string;
+
+  @ApiProperty({ enum: ['league', 'team', 'driver', 'race', 'platform'] })
+  @IsEnum(['league', 'team', 'driver', 'race', 'platform'])
+  sponsorshipType: 'league' | 'team' | 'driver' | 'race' | 'platform';
+
+  @ApiProperty()
+  @IsString()
+  pdfUrl: string;
+}
\ No newline at end of file
diff --git a/apps/api/src/domain/sponsor/dtos/LeagueDetailDTO.ts b/apps/api/src/domain/sponsor/dtos/LeagueDetailDTO.ts
new file mode 100644
index 000000000..d98a98cc7
--- /dev/null
+++ b/apps/api/src/domain/sponsor/dtos/LeagueDetailDTO.ts
@@ -0,0 +1,88 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsString, IsEnum, IsNumber, IsDateString, IsOptional } from 'class-validator';
+
+export class LeagueDetailDTO {
+  @ApiProperty()
+  @IsString()
+  id: string;
+
+  @ApiProperty()
+  @IsString()
+  name: string;
+
+  @ApiProperty()
+  @IsString()
+  game: string;
+
+  @ApiProperty({ enum: ['premium', 'standard', 'starter'] })
+  @IsEnum(['premium', 'standard', 'starter'])
+  tier: 'premium' | 'standard' | 'starter';
+
+  @ApiProperty()
+  @IsString()
+  season: string;
+
+  @ApiProperty()
+  @IsString()
+  description: string;
+
+  @ApiProperty()
+  @IsNumber()
+  drivers: number;
+
+  @ApiProperty()
+  @IsNumber()
+  races: number;
+
+  @ApiProperty()
+  @IsNumber()
+  completedRaces: number;
+
+  @ApiProperty()
+  @IsNumber()
+  totalImpressions: number;
+
+  @ApiProperty()
+  @IsNumber()
+  avgViewsPerRace: number;
+
+  @ApiProperty()
+  @IsNumber()
+  engagement: number;
+
+  @ApiProperty()
+  @IsNumber()
+  rating: number;
+
+  @ApiProperty({ enum: ['active', 'upcoming', 'completed'] })
+  @IsEnum(['active', 'upcoming', 'completed'])
+  seasonStatus: 'active' | 'upcoming' | 'completed';
+
+  @ApiProperty({ type: Object })
+  seasonDates: {
+    start: string;
+    end: string;
+  };
+
+  @ApiProperty({ type: Object, required: false })
+  @IsOptional()
+  nextRace?: {
+    name: string;
+    date: string;
+  };
+
+  @ApiProperty({ type: Object })
+  sponsorSlots: {
+    main: {
+      available: boolean;
+      price: number;
+      benefits: string[];
+    };
+    secondary: {
+      available: number;
+      total: number;
+      price: number;
+      benefits: string[];
+    };
+  };
+}
\ No newline at end of file
diff --git a/apps/api/src/domain/sponsor/dtos/NotificationSettingsDTO.ts b/apps/api/src/domain/sponsor/dtos/NotificationSettingsDTO.ts
new file mode 100644
index 000000000..81f3d5828
--- /dev/null
+++ b/apps/api/src/domain/sponsor/dtos/NotificationSettingsDTO.ts
@@ -0,0 +1,28 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsBoolean } from 'class-validator';
+
+export class NotificationSettingsDTO {
+  @ApiProperty()
+  @IsBoolean()
+  emailNewSponsorships: boolean;
+
+  @ApiProperty()
+  @IsBoolean()
+  emailWeeklyReport: boolean;
+
+  @ApiProperty()
+  @IsBoolean()
+  emailRaceAlerts: boolean;
+
+  @ApiProperty()
+  @IsBoolean()
+  emailPaymentAlerts: boolean;
+
+  @ApiProperty()
+  @IsBoolean()
+  emailNewOpportunities: boolean;
+
+  @ApiProperty()
+  @IsBoolean()
+  emailContractExpiry: boolean;
+}
\ No newline at end of file
diff --git a/apps/api/src/domain/sponsor/dtos/PaymentMethodDTO.ts b/apps/api/src/domain/sponsor/dtos/PaymentMethodDTO.ts
new file mode 100644
index 000000000..e9472416c
--- /dev/null
+++ b/apps/api/src/domain/sponsor/dtos/PaymentMethodDTO.ts
@@ -0,0 +1,40 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsString, IsEnum, IsBoolean, IsOptional, IsNumber } from 'class-validator';
+
+export class PaymentMethodDTO {
+  @ApiProperty()
+  @IsString()
+  id: string;
+
+  @ApiProperty({ enum: ['card', 'bank', 'sepa'] })
+  @IsEnum(['card', 'bank', 'sepa'])
+  type: 'card' | 'bank' | 'sepa';
+
+  @ApiProperty()
+  @IsString()
+  last4: string;
+
+  @ApiProperty({ required: false })
+  @IsOptional()
+  @IsString()
+  brand?: string;
+
+  @ApiProperty()
+  @IsBoolean()
+  isDefault: boolean;
+
+  @ApiProperty({ required: false })
+  @IsOptional()
+  @IsNumber()
+  expiryMonth?: number;
+
+  @ApiProperty({ required: false })
+  @IsOptional()
+  @IsNumber()
+  expiryYear?: number;
+
+  @ApiProperty({ required: false })
+  @IsOptional()
+  @IsString()
+  bankName?: string;
+}
\ No newline at end of file
diff --git a/apps/api/src/domain/sponsor/dtos/PrivacySettingsDTO.ts b/apps/api/src/domain/sponsor/dtos/PrivacySettingsDTO.ts
new file mode 100644
index 000000000..4d5b21120
--- /dev/null
+++ b/apps/api/src/domain/sponsor/dtos/PrivacySettingsDTO.ts
@@ -0,0 +1,20 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsBoolean } from 'class-validator';
+
+export class PrivacySettingsDTO {
+  @ApiProperty()
+  @IsBoolean()
+  publicProfile: boolean;
+
+  @ApiProperty()
+  @IsBoolean()
+  showStats: boolean;
+
+  @ApiProperty()
+  @IsBoolean()
+  showActiveSponsorships: boolean;
+
+  @ApiProperty()
+  @IsBoolean()
+  allowDirectContact: boolean;
+}
\ No newline at end of file
diff --git a/apps/api/src/domain/sponsor/dtos/RaceDTO.ts b/apps/api/src/domain/sponsor/dtos/RaceDTO.ts
new file mode 100644
index 000000000..3e723a4c6
--- /dev/null
+++ b/apps/api/src/domain/sponsor/dtos/RaceDTO.ts
@@ -0,0 +1,24 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsString, IsEnum, IsNumber, IsDateString } from 'class-validator';
+
+export class RaceDTO {
+  @ApiProperty()
+  @IsString()
+  id: string;
+
+  @ApiProperty()
+  @IsString()
+  name: string;
+
+  @ApiProperty()
+  @IsDateString()
+  date: string;
+
+  @ApiProperty()
+  @IsNumber()
+  views: number;
+
+  @ApiProperty({ enum: ['upcoming', 'completed'] })
+  @IsEnum(['upcoming', 'completed'])
+  status: 'upcoming' | 'completed';
+}
\ No newline at end of file
diff --git a/apps/api/src/domain/sponsor/dtos/RenewalAlertDTO.ts b/apps/api/src/domain/sponsor/dtos/RenewalAlertDTO.ts
new file mode 100644
index 000000000..d4c55d2c1
--- /dev/null
+++ b/apps/api/src/domain/sponsor/dtos/RenewalAlertDTO.ts
@@ -0,0 +1,24 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsString, IsEnum, IsNumber, IsDateString } from 'class-validator';
+
+export class RenewalAlertDTO {
+  @ApiProperty()
+  @IsString()
+  id: string;
+
+  @ApiProperty()
+  @IsString()
+  name: string;
+
+  @ApiProperty({ enum: ['league', 'team', 'driver', 'race', 'platform'] })
+  @IsEnum(['league', 'team', 'driver', 'race', 'platform'])
+  type: 'league' | 'team' | 'driver' | 'race' | 'platform';
+
+  @ApiProperty()
+  @IsDateString()
+  renewDate: string;
+
+  @ApiProperty()
+  @IsNumber()
+  price: number;
+}
\ No newline at end of file
diff --git a/apps/api/src/domain/sponsor/dtos/SponsorDashboardDTO.ts b/apps/api/src/domain/sponsor/dtos/SponsorDashboardDTO.ts
index cea1eab56..0e13e473f 100644
--- a/apps/api/src/domain/sponsor/dtos/SponsorDashboardDTO.ts
+++ b/apps/api/src/domain/sponsor/dtos/SponsorDashboardDTO.ts
@@ -1,8 +1,11 @@
 import { ApiProperty } from '@nestjs/swagger';
-import { IsString } from 'class-validator';
+import { IsString, IsArray, IsObject } from 'class-validator';
 import { SponsorDashboardMetricsDTO } from './SponsorDashboardMetricsDTO';
 import { SponsoredLeagueDTO } from './SponsoredLeagueDTO';
 import { SponsorDashboardInvestmentDTO } from './SponsorDashboardInvestmentDTO';
+import { SponsorshipDTO } from './SponsorshipDTO';
+import { ActivityItemDTO } from './ActivityItemDTO';
+import { RenewalAlertDTO } from './RenewalAlertDTO';
 
 export class SponsorDashboardDTO {
   @ApiProperty()
@@ -21,4 +24,19 @@ export class SponsorDashboardDTO {
 
   @ApiProperty({ type: SponsorDashboardInvestmentDTO })
   investment: SponsorDashboardInvestmentDTO;
+
+  @ApiProperty({ type: Object })
+  sponsorships: {
+    leagues: SponsorshipDTO[];
+    teams: SponsorshipDTO[];
+    drivers: SponsorshipDTO[];
+    races: SponsorshipDTO[];
+    platform: SponsorshipDTO[];
+  };
+
+  @ApiProperty({ type: [ActivityItemDTO] })
+  recentActivity: ActivityItemDTO[];
+
+  @ApiProperty({ type: [RenewalAlertDTO] })
+  upcomingRenewals: RenewalAlertDTO[];
 }
\ No newline at end of file
diff --git a/apps/api/src/domain/sponsor/dtos/SponsorProfileDTO.ts b/apps/api/src/domain/sponsor/dtos/SponsorProfileDTO.ts
new file mode 100644
index 000000000..ae9fcf430
--- /dev/null
+++ b/apps/api/src/domain/sponsor/dtos/SponsorProfileDTO.ts
@@ -0,0 +1,56 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsString, IsOptional, IsObject } from 'class-validator';
+
+export class SponsorProfileDTO {
+  @ApiProperty()
+  @IsString()
+  companyName: string;
+
+  @ApiProperty()
+  @IsString()
+  contactName: string;
+
+  @ApiProperty()
+  @IsString()
+  contactEmail: string;
+
+  @ApiProperty()
+  @IsString()
+  contactPhone: string;
+
+  @ApiProperty()
+  @IsString()
+  website: string;
+
+  @ApiProperty()
+  @IsString()
+  description: string;
+
+  @ApiProperty({ required: false })
+  @IsOptional()
+  @IsString()
+  logoUrl?: string;
+
+  @ApiProperty()
+  @IsString()
+  industry: string;
+
+  @ApiProperty({ type: Object })
+  address: {
+    street: string;
+    city: string;
+    country: string;
+    postalCode: string;
+  };
+
+  @ApiProperty()
+  @IsString()
+  taxId: string;
+
+  @ApiProperty({ type: Object })
+  socialLinks: {
+    twitter: string;
+    linkedin: string;
+    instagram: string;
+  };
+}
\ No newline at end of file
diff --git a/apps/api/src/domain/sponsor/dtos/SponsorshipDTO.ts b/apps/api/src/domain/sponsor/dtos/SponsorshipDTO.ts
new file mode 100644
index 000000000..038d858e5
--- /dev/null
+++ b/apps/api/src/domain/sponsor/dtos/SponsorshipDTO.ts
@@ -0,0 +1,85 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsString, IsEnum, IsNumber, IsOptional, IsDateString } from 'class-validator';
+
+export class SponsorshipDTO {
+  @ApiProperty()
+  @IsString()
+  id: string;
+
+  @ApiProperty({ enum: ['leagues', 'teams', 'drivers', 'races', 'platform'] })
+  @IsEnum(['leagues', 'teams', 'drivers', 'races', 'platform'])
+  type: 'leagues' | 'teams' | 'drivers' | 'races' | 'platform';
+
+  @ApiProperty()
+  @IsString()
+  entityId: string;
+
+  @ApiProperty()
+  @IsString()
+  entityName: string;
+
+  @ApiProperty({ enum: ['main', 'secondary'], required: false })
+  @IsOptional()
+  @IsEnum(['main', 'secondary'])
+  tier?: 'main' | 'secondary';
+
+  @ApiProperty({ enum: ['active', 'pending_approval', 'approved', 'rejected', 'expired'] })
+  @IsEnum(['active', 'pending_approval', 'approved', 'rejected', 'expired'])
+  status: 'active' | 'pending_approval' | 'approved' | 'rejected' | 'expired';
+
+  @ApiProperty({ required: false })
+  @IsOptional()
+  @IsDateString()
+  applicationDate?: string;
+
+  @ApiProperty({ required: false })
+  @IsOptional()
+  @IsDateString()
+  approvalDate?: string;
+
+  @ApiProperty({ required: false })
+  @IsOptional()
+  @IsString()
+  rejectionReason?: string;
+
+  @ApiProperty()
+  @IsDateString()
+  startDate: string;
+
+  @ApiProperty()
+  @IsDateString()
+  endDate: string;
+
+  @ApiProperty()
+  @IsNumber()
+  price: number;
+
+  @ApiProperty()
+  @IsNumber()
+  impressions: number;
+
+  @ApiProperty({ required: false })
+  @IsOptional()
+  @IsNumber()
+  impressionsChange?: number;
+
+  @ApiProperty({ required: false })
+  @IsOptional()
+  @IsNumber()
+  engagement?: number;
+
+  @ApiProperty({ required: false })
+  @IsOptional()
+  @IsString()
+  details?: string;
+
+  @ApiProperty({ required: false })
+  @IsOptional()
+  @IsString()
+  entityOwner?: string;
+
+  @ApiProperty({ required: false })
+  @IsOptional()
+  @IsString()
+  applicationMessage?: string;
+}
\ No newline at end of file
diff --git a/apps/website/app/onboarding/page.tsx b/apps/website/app/onboarding/page.tsx
index a8171bd16..88b895114 100644
--- a/apps/website/app/onboarding/page.tsx
+++ b/apps/website/app/onboarding/page.tsx
@@ -2,44 +2,57 @@
 
 import { useEffect, useState } from 'react';
 import { useRouter } from 'next/navigation';
-import OnboardingWizard from '@/components/onboarding/OnboardingWizard';
 import { Loader2 } from 'lucide-react';
 
-// TODO: Re-enable API integration once backend is ready
-// import { redirect } from 'next/navigation';
-
+import OnboardingWizard from '@/components/onboarding/OnboardingWizard';
+import { useAuth } from '@/lib/auth/AuthContext';
+import { useServices } from '@/lib/services/ServiceProvider';
+ 
 export default function OnboardingPage() {
   const router = useRouter();
+  const { session } = useAuth();
+  const { driverService } = useServices();
   const [checking, setChecking] = useState(true);
 
   useEffect(() => {
-    // TODO: Re-enable auth check once backend is ready
-    // For now, just show onboarding after a brief check
-    const checkDemoMode = () => {
-      // Check if user has demo mode cookie
-      const cookies = document.cookie.split(';');
-      const demoModeCookie = cookies.find(c => c.trim().startsWith('gridpilot_demo_mode='));
-      
-      if (!demoModeCookie) {
-        // Not logged in, redirect to auth
-        router.push('/auth/login?returnTo=/onboarding');
-        return;
+    // If user is not authenticated, redirect to login
+    if (!session) {
+      router.replace('/auth/login?returnTo=/onboarding');
+      return;
+    }
+
+    let cancelled = false;
+
+    const checkOnboarding = async () => {
+      try {
+        const driver = await driverService.getCurrentDriver();
+
+        if (cancelled) return;
+
+        // If driver profile exists, onboarding is complete – go to dashboard
+        if (driver) {
+          router.replace('/dashboard');
+          return;
+        }
+
+        // Otherwise allow onboarding wizard to render
+        setChecking(false);
+      } catch {
+        // On error, allow onboarding to proceed so user isn't blocked
+        if (!cancelled) {
+          setChecking(false);
+        }
       }
-      
-      // For demo, skip onboarding and go to dashboard
-      // In production, this would check if onboarding is complete
-      router.push('/dashboard');
     };
 
-    // Brief delay to prevent flash
-    const timer = setTimeout(() => {
-      checkDemoMode();
-    }, 500);
+    checkOnboarding();
 
-    return () => clearTimeout(timer);
-  }, [router]);
+    return () => {
+      cancelled = true;
+    };
+  }, [session, driverService, router]);
 
-  // Show loading while checking
+  // Show loading while checking auth/onboarding status
   if (checking) {
     return (
       <main className="min-h-screen bg-deep-graphite flex items-center justify-center">
diff --git a/apps/website/app/page.tsx b/apps/website/app/page.tsx
index d9f36599d..2dbafb7bd 100644
--- a/apps/website/app/page.tsx
+++ b/apps/website/app/page.tsx
@@ -14,19 +14,39 @@ import SimPlatformMockup from '@/components/mockups/SimPlatformMockup';
 import MockupStack from '@/components/ui/MockupStack';
 import Card from '@/components/ui/Card';
 import Button from '@/components/ui/Button';
+import { LandingService } from '@/lib/services/landing/LandingService';
+import { SessionService } from '@/lib/services/auth/SessionService';
+import { AuthApiClient } from '@/lib/api/auth/AuthApiClient';
+import { RacesApiClient } from '@/lib/api/races/RacesApiClient';
+import { LeaguesApiClient } from '@/lib/api/leagues/LeaguesApiClient';
+import { TeamsApiClient } from '@/lib/api/teams/TeamsApiClient';
+import { ConsoleErrorReporter } from '@/lib/infrastructure/logging/ConsoleErrorReporter';
+import { ConsoleLogger } from '@/lib/infrastructure/logging/ConsoleLogger';
 
 export default async function HomePage() {
-  const session = null; // TODO
+  const baseUrl = process.env.NEXT_PUBLIC_API_BASE_URL || 'http://localhost:3001';
+  const errorReporter = new ConsoleErrorReporter();
+  const logger = new ConsoleLogger();
+
+  const authApiClient = new AuthApiClient(baseUrl, errorReporter, logger);
+  const racesApiClient = new RacesApiClient(baseUrl, errorReporter, logger);
+  const leaguesApiClient = new LeaguesApiClient(baseUrl, errorReporter, logger);
+  const teamsApiClient = new TeamsApiClient(baseUrl, errorReporter, logger);
+
+  const sessionService = new SessionService(authApiClient);
+  const landingService = new LandingService(racesApiClient, leaguesApiClient, teamsApiClient);
+
+  const session = await sessionService.getSession();
   if (session) {
     redirect('/dashboard');
   }
 
   const mode = getAppMode();
   const isAlpha = mode === 'alpha';
-  // const upcomingRaces = getUpcomingRaces(3);
-  const upcomingRaces = []; // TODO
-  const topLeagues = []; // TODO
-  const teams = []; // TODO
+  const discovery = await landingService.getHomeDiscovery();
+  const upcomingRaces = discovery.upcomingRaces;
+  const topLeagues = discovery.topLeagues;
+  const teams = discovery.teams;
 
   return (
     <main className="min-h-screen">
@@ -332,10 +352,7 @@ export default async function HomePage() {
                         <p className="text-xs text-gray-400 truncate">{race.car}</p>
                       </div>
                       <div className="text-right text-xs text-gray-500 whitespace-nowrap">
-                        {race.scheduledAt.toLocaleDateString(undefined, {
-                          month: 'short',
-                          day: 'numeric'
-                        })}
+                        {race.formattedDate}
                       </div>
                     </li>
                   ))}
diff --git a/apps/website/app/sponsor/billing/page.tsx b/apps/website/app/sponsor/billing/page.tsx
index 7b0bf2d7f..eb82a6d68 100644
--- a/apps/website/app/sponsor/billing/page.tsx
+++ b/apps/website/app/sponsor/billing/page.tsx
@@ -1,6 +1,6 @@
 'use client';
 
-import { useState } from 'react';
+import { useState, useEffect } from 'react';
 import { motion, useReducedMotion } from 'framer-motion';
 import Card from '@/components/ui/Card';
 import Button from '@/components/ui/Button';
@@ -10,6 +10,9 @@ import StatusBadge from '@/components/ui/StatusBadge';
 import InfoBanner from '@/components/ui/InfoBanner';
 import PageHeader from '@/components/ui/PageHeader';
 import { siteConfig } from '@/lib/siteConfig';
+import { BillingViewModel } from '@/lib/view-models/BillingViewModel';
+import { SponsorService } from '@/lib/services/sponsors/SponsorService';
+import { ServiceFactory } from '@/lib/services/ServiceFactory';
 import {
   CreditCard,
   DollarSign,
@@ -73,108 +76,17 @@ interface BillingStats {
 // Mock Data
 // ============================================================================
 
-const MOCK_PAYMENT_METHODS: PaymentMethod[] = [
-  {
-    id: 'pm-1',
-    type: 'card',
-    last4: '4242',
-    brand: 'Visa',
-    isDefault: true,
-    expiryMonth: 12,
-    expiryYear: 2027,
-  },
-  {
-    id: 'pm-2',
-    type: 'card',
-    last4: '5555',
-    brand: 'Mastercard',
-    isDefault: false,
-    expiryMonth: 6,
-    expiryYear: 2026,
-  },
-  {
-    id: 'pm-3',
-    type: 'sepa',
-    last4: '8901',
-    bankName: 'Deutsche Bank',
-    isDefault: false,
-  },
-];
-
-const MOCK_INVOICES: Invoice[] = [
-  {
-    id: 'inv-1',
-    invoiceNumber: 'GP-2025-001234',
-    date: new Date('2025-11-01'),
-    dueDate: new Date('2025-11-15'),
-    amount: 1090.91,
-    vatAmount: 207.27,
-    totalAmount: 1298.18,
-    status: 'paid',
-    description: 'GT3 Pro Championship - Primary Sponsor (Q4 2025)',
-    sponsorshipType: 'league',
-    pdfUrl: '#',
-  },
-  {
-    id: 'inv-2',
-    invoiceNumber: 'GP-2025-001235',
-    date: new Date('2025-10-01'),
-    dueDate: new Date('2025-10-15'),
-    amount: 363.64,
-    vatAmount: 69.09,
-    totalAmount: 432.73,
-    status: 'paid',
-    description: 'Team Velocity - Gear Sponsor (Q4 2025)',
-    sponsorshipType: 'team',
-    pdfUrl: '#',
-  },
-  {
-    id: 'inv-3',
-    invoiceNumber: 'GP-2025-001236',
-    date: new Date('2025-12-01'),
-    dueDate: new Date('2025-12-15'),
-    amount: 318.18,
-    vatAmount: 60.45,
-    totalAmount: 378.63,
-    status: 'pending',
-    description: 'Alex Thompson - Driver Sponsorship (Dec 2025)',
-    sponsorshipType: 'driver',
-    pdfUrl: '#',
-  },
-  {
-    id: 'inv-4',
-    invoiceNumber: 'GP-2025-001237',
-    date: new Date('2025-11-15'),
-    dueDate: new Date('2025-11-29'),
-    amount: 454.55,
-    vatAmount: 86.36,
-    totalAmount: 540.91,
-    status: 'overdue',
-    description: 'Touring Car Cup - Secondary Sponsor (Q1 2026)',
-    sponsorshipType: 'league',
-    pdfUrl: '#',
-  },
-];
-
-const MOCK_STATS: BillingStats = {
-  totalSpent: 12450,
-  pendingAmount: 919.54,
-  nextPaymentDate: new Date('2025-12-15'),
-  nextPaymentAmount: 378.63,
-  activeSponsorships: 6,
-  averageMonthlySpend: 2075,
-};
 
 // ============================================================================
 // Components
 // ============================================================================
 
 function PaymentMethodCard({
-  method, 
+  method,
   onSetDefault,
-  onRemove 
-}: { 
-  method: PaymentMethod; 
+  onRemove
+}: {
+  method: any;
   onSetDefault: () => void;
   onRemove: () => void;
 }) {
@@ -214,16 +126,16 @@ function PaymentMethodCard({
           </div>
           <div>
             <div className="flex items-center gap-2">
-              <span className="font-medium text-white">{getLabel()}</span>
+              <span className="font-medium text-white">{method.displayLabel}</span>
               {method.isDefault && (
                 <span className="px-2 py-0.5 rounded-full text-xs bg-primary-blue/20 text-primary-blue font-medium">
                   Default
                 </span>
               )}
             </div>
-            {method.expiryMonth && method.expiryYear && (
+            {method.expiryDisplay && (
               <span className="text-sm text-gray-500">
-                Expires {String(method.expiryMonth).padStart(2, '0')}/{method.expiryYear}
+                Expires {method.expiryDisplay}
               </span>
             )}
             {method.type === 'sepa' && (
@@ -246,7 +158,7 @@ function PaymentMethodCard({
   );
 }
 
-function InvoiceRow({ invoice, index }: { invoice: Invoice; index: number }) {
+function InvoiceRow({ invoice, index }: { invoice: any; index: number }) {
   const shouldReduceMotion = useReducedMotion();
   
   const statusConfig = {
@@ -313,7 +225,7 @@ function InvoiceRow({ invoice, index }: { invoice: Invoice; index: number }) {
             <span>{invoice.invoiceNumber}</span>
             <span>•</span>
             <span>
-              {invoice.date.toLocaleDateString('en-US', { month: 'short', day: 'numeric', year: 'numeric' })}
+              {invoice.formattedDate}
             </span>
           </div>
         </div>
@@ -322,13 +234,13 @@ function InvoiceRow({ invoice, index }: { invoice: Invoice; index: number }) {
       <div className="flex items-center gap-6">
         <div className="text-right">
           <div className="font-semibold text-white">
-            €{invoice.totalAmount.toLocaleString('de-DE', { minimumFractionDigits: 2 })}
+            {invoice.formattedTotalAmount}
           </div>
           <div className="text-xs text-gray-500">
-            incl. €{invoice.vatAmount.toLocaleString('de-DE', { minimumFractionDigits: 2 })} VAT
+            incl. {invoice.formattedVatAmount} VAT
           </div>
         </div>
-        
+
         <div className={`flex items-center gap-1.5 px-2.5 py-1 rounded-full text-xs font-medium ${status.bg} ${status.color} border ${status.border}`}>
           <StatusIcon className="w-3 h-3" />
           {status.label}
@@ -349,9 +261,49 @@ function InvoiceRow({ invoice, index }: { invoice: Invoice; index: number }) {
 
 export default function SponsorBillingPage() {
   const shouldReduceMotion = useReducedMotion();
-  const [paymentMethods, setPaymentMethods] = useState(MOCK_PAYMENT_METHODS);
+  const [data, setData] = useState<BillingViewModel | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
   const [showAllInvoices, setShowAllInvoices] = useState(false);
 
+  useEffect(() => {
+    const loadBilling = async () => {
+      try {
+        const sponsorService = ServiceFactory.getSponsorService();
+        const billingData = await sponsorService.getBilling('demo-sponsor-1');
+        setData(new BillingViewModel(billingData));
+      } catch (err) {
+        console.error('Error loading billing data:', err);
+        setError('Failed to load billing data');
+      } finally {
+        setLoading(false);
+      }
+    };
+
+    loadBilling();
+  }, []);
+
+  if (loading) {
+    return (
+      <div className="max-w-5xl mx-auto py-8 px-4 flex items-center justify-center min-h-[400px]">
+        <div className="text-center">
+          <div className="w-8 h-8 border-2 border-primary-blue border-t-transparent rounded-full animate-spin mx-auto mb-4" />
+          <p className="text-gray-400">Loading billing data...</p>
+        </div>
+      </div>
+    );
+  }
+
+  if (error || !data) {
+    return (
+      <div className="max-w-5xl mx-auto py-8 px-4 flex items-center justify-center min-h-[400px]">
+        <div className="text-center">
+          <p className="text-gray-400">{error || 'No billing data available'}</p>
+        </div>
+      </div>
+    );
+  }
+
   const handleSetDefault = (methodId: string) => {
     setPaymentMethods(methods => 
       methods.map(m => ({ ...m, isDefault: m.id === methodId }))
@@ -364,7 +316,17 @@ export default function SponsorBillingPage() {
     }
   };
 
-  const displayedInvoices = showAllInvoices ? MOCK_INVOICES : MOCK_INVOICES.slice(0, 4);
+  const handleSetDefault = (methodId: string) => {
+    // In a real app, this would call an API
+    console.log('Setting default payment method:', methodId);
+  };
+
+  const handleRemoveMethod = (methodId: string) => {
+    if (confirm('Remove this payment method?')) {
+      // In a real app, this would call an API
+      console.log('Removing payment method:', methodId);
+    }
+  };
 
   const containerVariants = {
     hidden: { opacity: 0 },
@@ -404,7 +366,7 @@ export default function SponsorBillingPage() {
         <StatCard
           icon={DollarSign}
           label="Total Spent"
-          value={`€${MOCK_STATS.totalSpent.toLocaleString('de-DE')}`}
+          value={data.stats.formattedTotalSpent}
           subValue="All time"
           color="text-performance-green"
           bgColor="bg-performance-green/10"
@@ -412,23 +374,23 @@ export default function SponsorBillingPage() {
         <StatCard
           icon={AlertTriangle}
           label="Pending Payments"
-          value={`€${MOCK_STATS.pendingAmount.toLocaleString('de-DE', { minimumFractionDigits: 2 })}`}
-          subValue={`${MOCK_INVOICES.filter(i => i.status === 'pending' || i.status === 'overdue').length} invoices`}
+          value={data.stats.formattedPendingAmount}
+          subValue={`${data.invoices.filter(i => i.status === 'pending' || i.status === 'overdue').length} invoices`}
           color="text-warning-amber"
           bgColor="bg-warning-amber/10"
         />
         <StatCard
           icon={Calendar}
           label="Next Payment"
-          value={MOCK_STATS.nextPaymentDate.toLocaleDateString('en-US', { month: 'short', day: 'numeric' })}
-          subValue={`€${MOCK_STATS.nextPaymentAmount.toLocaleString('de-DE', { minimumFractionDigits: 2 })}`}
+          value={data.stats.formattedNextPaymentDate}
+          subValue={data.stats.formattedNextPaymentAmount}
           color="text-primary-blue"
           bgColor="bg-primary-blue/10"
         />
         <StatCard
           icon={TrendingUp}
           label="Monthly Average"
-          value={`€${MOCK_STATS.averageMonthlySpend.toLocaleString('de-DE')}`}
+          value={data.stats.formattedAverageMonthlySpend}
           subValue="Last 6 months"
           color="text-gray-400"
           bgColor="bg-iron-gray"
@@ -449,10 +411,10 @@ export default function SponsorBillingPage() {
             }
           />
           <div className="p-5 space-y-3">
-            {paymentMethods.map((method) => (
-              <PaymentMethodCard 
-                key={method.id} 
-                method={method} 
+            {data.paymentMethods.map((method) => (
+              <PaymentMethodCard
+                key={method.id}
+                method={method}
                 onSetDefault={() => handleSetDefault(method.id)}
                 onRemove={() => handleRemoveMethod(method.id)}
               />
@@ -482,18 +444,18 @@ export default function SponsorBillingPage() {
             }
           />
           <div>
-            {displayedInvoices.map((invoice, index) => (
+            {data.invoices.slice(0, showAllInvoices ? data.invoices.length : 4).map((invoice, index) => (
               <InvoiceRow key={invoice.id} invoice={invoice} index={index} />
             ))}
           </div>
-          {MOCK_INVOICES.length > 4 && (
+          {data.invoices.length > 4 && (
             <div className="p-4 border-t border-charcoal-outline">
-              <Button 
-                variant="secondary" 
+              <Button
+                variant="secondary"
                 className="w-full"
                 onClick={() => setShowAllInvoices(!showAllInvoices)}
               >
-                {showAllInvoices ? 'Show Less' : `View All ${MOCK_INVOICES.length} Invoices`}
+                {showAllInvoices ? 'Show Less' : `View All ${data.invoices.length} Invoices`}
                 <ChevronRight className={`w-4 h-4 ml-2 transition-transform ${showAllInvoices ? 'rotate-90' : ''}`} />
               </Button>
             </div>
diff --git a/apps/website/app/sponsor/campaigns/page.tsx b/apps/website/app/sponsor/campaigns/page.tsx
index 4fd5a1fc1..9ade3f3c6 100644
--- a/apps/website/app/sponsor/campaigns/page.tsx
+++ b/apps/website/app/sponsor/campaigns/page.tsx
@@ -8,6 +8,9 @@ import Card from '@/components/ui/Card';
 import Button from '@/components/ui/Button';
 import StatusBadge from '@/components/ui/StatusBadge';
 import InfoBanner from '@/components/ui/InfoBanner';
+import { SponsorService } from '@/lib/services/sponsors/SponsorService';
+import { ServiceFactory } from '@/lib/services/ServiceFactory';
+import { SponsorSponsorshipsViewModel } from '@/lib/view-models/SponsorSponsorshipsViewModel';
 import { 
   Megaphone, 
   Trophy, 
@@ -69,241 +72,6 @@ interface Sponsorship {
 // Mock Data - Updated to show application workflow
 // ============================================================================
 
-const MOCK_SPONSORSHIPS: Sponsorship[] = [
-  // Active sponsorships (approved and started)
-  {
-    id: 's1',
-    type: 'leagues',
-    entityId: 'l1',
-    entityName: 'GT3 Masters Championship',
-    tier: 'main',
-    status: 'active',
-    applicationDate: new Date('2025-09-15'),
-    approvalDate: new Date('2025-09-18'),
-    startDate: new Date('2025-10-01'),
-    endDate: new Date('2026-02-28'),
-    price: 1200,
-    impressions: 45200,
-    impressionsChange: 12.5,
-    engagement: 4.2,
-    details: '48 drivers • 12 races',
-    entityOwner: 'Championship Admin',
-  },
-  {
-    id: 's2',
-    type: 'leagues',
-    entityId: 'l2',
-    entityName: 'Endurance Pro Series',
-    tier: 'secondary',
-    status: 'active',
-    applicationDate: new Date('2025-10-20'),
-    approvalDate: new Date('2025-10-25'),
-    startDate: new Date('2025-11-01'),
-    endDate: new Date('2026-03-31'),
-    price: 500,
-    impressions: 38400,
-    impressionsChange: 8.3,
-    engagement: 3.8,
-    details: '72 drivers • 6 races',
-    entityOwner: 'Endurance Racing LLC',
-  },
-  {
-    id: 's3',
-    type: 'teams',
-    entityId: 't1',
-    entityName: 'Velocity Racing',
-    status: 'active',
-    applicationDate: new Date('2025-08-25'),
-    approvalDate: new Date('2025-08-26'),
-    startDate: new Date('2025-09-01'),
-    endDate: new Date('2026-08-31'),
-    price: 400,
-    impressions: 12300,
-    impressionsChange: 5.2,
-    engagement: 5.1,
-    details: '4 drivers • GT3 & LMP',
-    entityOwner: 'Team Principal',
-  },
-  // Pending approval (waiting for entity owner)
-  {
-    id: 's9',
-    type: 'leagues',
-    entityId: 'l3',
-    entityName: 'Formula Sim Series',
-    tier: 'main',
-    status: 'pending_approval',
-    applicationDate: new Date('2025-12-14'),
-    startDate: new Date('2026-01-01'),
-    endDate: new Date('2026-06-30'),
-    price: 1500,
-    impressions: 0,
-    details: '36 drivers • F3 class',
-    entityOwner: 'Formula Sim Organization',
-    applicationMessage: 'We would love to be your main sponsor for the upcoming season.',
-  },
-  {
-    id: 's10',
-    type: 'teams',
-    entityId: 't3',
-    entityName: 'Phoenix Racing Team',
-    status: 'pending_approval',
-    applicationDate: new Date('2025-12-12'),
-    startDate: new Date('2026-01-01'),
-    endDate: new Date('2026-12-31'),
-    price: 600,
-    impressions: 0,
-    details: '5 drivers • Multi-class',
-    entityOwner: 'Phoenix Team Manager',
-    applicationMessage: 'Interested in sponsoring your team for the full 2026 season.',
-  },
-  {
-    id: 's11',
-    type: 'drivers',
-    entityId: 'd3',
-    entityName: 'James Rodriguez',
-    status: 'pending_approval',
-    applicationDate: new Date('2025-12-10'),
-    startDate: new Date('2026-01-01'),
-    endDate: new Date('2026-12-31'),
-    price: 250,
-    impressions: 0,
-    details: 'Rising rookie • GT3 Masters',
-    entityOwner: 'James Rodriguez',
-    applicationMessage: 'Would like to support your racing career.',
-  },
-  // Recently approved (not yet started)
-  {
-    id: 's12',
-    type: 'races',
-    entityId: 'r1',
-    entityName: 'Spa 24 Hours',
-    status: 'approved',
-    applicationDate: new Date('2025-12-01'),
-    approvalDate: new Date('2025-12-05'),
-    startDate: new Date('2025-12-20'),
-    endDate: new Date('2025-12-21'),
-    price: 300,
-    impressions: 0,
-    details: 'Endurance Pro Series • Dec 20-21',
-    entityOwner: 'Race Director',
-  },
-  {
-    id: 's13',
-    type: 'drivers',
-    entityId: 'd4',
-    entityName: 'Emma Wilson',
-    status: 'approved',
-    applicationDate: new Date('2025-12-08'),
-    approvalDate: new Date('2025-12-10'),
-    startDate: new Date('2026-01-01'),
-    endDate: new Date('2026-12-31'),
-    price: 180,
-    impressions: 0,
-    details: 'Touring Car specialist',
-    entityOwner: 'Emma Wilson',
-  },
-  // Rejected applications
-  {
-    id: 's14',
-    type: 'leagues',
-    entityId: 'l4',
-    entityName: 'Elite GT Championship',
-    tier: 'main',
-    status: 'rejected',
-    applicationDate: new Date('2025-11-20'),
-    startDate: new Date('2026-01-01'),
-    endDate: new Date('2026-06-30'),
-    price: 2000,
-    impressions: 0,
-    details: '24 drivers • Invite-only',
-    entityOwner: 'Elite Racing Committee',
-    rejectionReason: 'Main sponsor position already filled for the upcoming season.',
-  },
-  {
-    id: 's15',
-    type: 'teams',
-    entityId: 't4',
-    entityName: 'Apex Motorsport',
-    status: 'rejected',
-    applicationDate: new Date('2025-11-15'),
-    startDate: new Date('2026-01-01'),
-    endDate: new Date('2026-12-31'),
-    price: 450,
-    impressions: 0,
-    details: '3 drivers • LMP2',
-    entityOwner: 'Apex Team Owner',
-    rejectionReason: 'Already have exclusive sponsor agreement in this category.',
-  },
-  // Existing active ones
-  {
-    id: 's4',
-    type: 'teams',
-    entityId: 't2',
-    entityName: 'Storm Motorsport',
-    status: 'active',
-    applicationDate: new Date('2025-10-01'),
-    approvalDate: new Date('2025-10-05'),
-    startDate: new Date('2025-10-15'),
-    endDate: new Date('2026-10-14'),
-    price: 350,
-    impressions: 8900,
-    impressionsChange: -2.1,
-    engagement: 4.5,
-    details: '3 drivers • Formula',
-    entityOwner: 'Storm Racing LLC',
-  },
-  {
-    id: 's5',
-    type: 'drivers',
-    entityId: 'd1',
-    entityName: 'Max Velocity',
-    status: 'active',
-    applicationDate: new Date('2025-10-20'),
-    approvalDate: new Date('2025-10-21'),
-    startDate: new Date('2025-11-01'),
-    endDate: new Date('2026-10-31'),
-    price: 200,
-    impressions: 8200,
-    impressionsChange: 15.8,
-    engagement: 6.2,
-    details: 'Velocity Racing • P1 in GT3 Masters',
-    entityOwner: 'Max Velocity',
-  },
-  {
-    id: 's6',
-    type: 'drivers',
-    entityId: 'd2',
-    entityName: 'Sarah Storm',
-    status: 'active',
-    applicationDate: new Date('2025-09-25'),
-    approvalDate: new Date('2025-09-26'),
-    startDate: new Date('2025-10-01'),
-    endDate: new Date('2026-09-30'),
-    price: 150,
-    impressions: 6100,
-    impressionsChange: 22.4,
-    engagement: 5.8,
-    details: 'Storm Motorsport • Rising star',
-    entityOwner: 'Sarah Storm',
-  },
-  {
-    id: 's8',
-    type: 'platform',
-    entityId: 'p1',
-    entityName: 'Homepage Banner',
-    status: 'active',
-    applicationDate: new Date('2025-11-25'),
-    approvalDate: new Date('2025-11-25'),
-    startDate: new Date('2025-12-01'),
-    endDate: new Date('2025-12-31'),
-    price: 500,
-    impressions: 52000,
-    impressionsChange: 3.4,
-    engagement: 2.1,
-    details: 'Header position • All pages',
-    entityOwner: 'GridPilot',
-  },
-];
 
 // ============================================================================
 // Configuration
@@ -360,7 +128,7 @@ const STATUS_CONFIG = {
 // Components
 // ============================================================================
 
-function SponsorshipCard({ sponsorship }: { sponsorship: Sponsorship }) {
+function SponsorshipCard({ sponsorship }: { sponsorship: any }) {
   const router = useRouter();
   const shouldReduceMotion = useReducedMotion();
   
@@ -492,7 +260,7 @@ function SponsorshipCard({ sponsorship }: { sponsorship: Sponsorship }) {
                 Impressions
               </div>
               <div className="flex items-center gap-2">
-                <span className="text-white font-semibold">{sponsorship.impressions.toLocaleString()}</span>
+                <span className="text-white font-semibold">{sponsorship.formattedImpressions}</span>
                 {sponsorship.impressionsChange !== undefined && sponsorship.impressionsChange !== 0 && (
                   <span className={`text-xs flex items-center ${
                     sponsorship.impressionsChange > 0 ? 'text-performance-green' : 'text-racing-red'
@@ -529,7 +297,7 @@ function SponsorshipCard({ sponsorship }: { sponsorship: Sponsorship }) {
                 <Trophy className="w-3 h-3" />
                 Investment
               </div>
-              <div className="text-white font-semibold">${sponsorship.price}</div>
+              <div className="text-white font-semibold">{sponsorship.formattedPrice}</div>
             </div>
           </div>
         )}
@@ -539,11 +307,11 @@ function SponsorshipCard({ sponsorship }: { sponsorship: Sponsorship }) {
           <div className="flex items-center gap-4 mb-4 text-sm">
             <div className="flex items-center gap-1 text-gray-400">
               <Calendar className="w-3.5 h-3.5" />
-              {sponsorship.startDate.toLocaleDateString('en-US', { month: 'short', year: 'numeric' })} - {sponsorship.endDate.toLocaleDateString('en-US', { month: 'short', year: 'numeric' })}
+              {sponsorship.periodDisplay}
             </div>
             <div className="flex items-center gap-1 text-gray-400">
               <Trophy className="w-3.5 h-3.5" />
-              ${sponsorship.price}
+              {sponsorship.formattedPrice}
             </div>
           </div>
         )}
@@ -597,20 +365,59 @@ export default function SponsorCampaignsPage() {
   const router = useRouter();
   const searchParams = useSearchParams();
   const shouldReduceMotion = useReducedMotion();
-  
+
   const initialType = (searchParams.get('type') as SponsorshipType) || 'all';
   const [typeFilter, setTypeFilter] = useState<SponsorshipType>(initialType);
   const [statusFilter, setStatusFilter] = useState<SponsorshipStatus>('all');
   const [searchQuery, setSearchQuery] = useState('');
+  const [data, setData] = useState<SponsorSponsorshipsViewModel | null>(null);
   const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
 
   useEffect(() => {
-    const timer = setTimeout(() => setLoading(false), 300);
-    return () => clearTimeout(timer);
+    const loadSponsorships = async () => {
+      try {
+        const sponsorService = ServiceFactory.getSponsorService();
+        const sponsorshipsData = await sponsorService.getSponsorSponsorships('demo-sponsor-1');
+        if (sponsorshipsData) {
+          setData(sponsorshipsData);
+        } else {
+          setError('Failed to load sponsorships data');
+        }
+      } catch (err) {
+        console.error('Error loading sponsorships:', err);
+        setError('Failed to load sponsorships data');
+      } finally {
+        setLoading(false);
+      }
+    };
+
+    loadSponsorships();
   }, []);
 
+  if (loading) {
+    return (
+      <div className="max-w-7xl mx-auto py-8 px-4 flex items-center justify-center min-h-[400px]">
+        <div className="text-center">
+          <div className="w-8 h-8 border-2 border-primary-blue border-t-transparent rounded-full animate-spin mx-auto mb-4" />
+          <p className="text-gray-400">Loading sponsorships...</p>
+        </div>
+      </div>
+    );
+  }
+
+  if (error || !data) {
+    return (
+      <div className="max-w-7xl mx-auto py-8 px-4 flex items-center justify-center min-h-[400px]">
+        <div className="text-center">
+          <p className="text-gray-400">{error || 'No sponsorships data available'}</p>
+        </div>
+      </div>
+    );
+  }
+
   // Filter sponsorships
-  const filteredSponsorships = MOCK_SPONSORSHIPS.filter(s => {
+  const filteredSponsorships = data.sponsorships.filter(s => {
     if (typeFilter !== 'all' && s.type !== typeFilter) return false;
     if (statusFilter !== 'all' && s.status !== statusFilter) return false;
     if (searchQuery && !s.entityName.toLowerCase().includes(searchQuery.toLowerCase())) return false;
@@ -619,22 +426,22 @@ export default function SponsorCampaignsPage() {
 
   // Calculate stats
   const stats = {
-    total: MOCK_SPONSORSHIPS.length,
-    active: MOCK_SPONSORSHIPS.filter(s => s.status === 'active').length,
-    pending: MOCK_SPONSORSHIPS.filter(s => s.status === 'pending_approval').length,
-    approved: MOCK_SPONSORSHIPS.filter(s => s.status === 'approved').length,
-    rejected: MOCK_SPONSORSHIPS.filter(s => s.status === 'rejected').length,
-    totalInvestment: MOCK_SPONSORSHIPS.filter(s => s.status === 'active').reduce((sum, s) => sum + s.price, 0),
-    totalImpressions: MOCK_SPONSORSHIPS.reduce((sum, s) => sum + s.impressions, 0),
+    total: data.sponsorships.length,
+    active: data.sponsorships.filter(s => s.status === 'active').length,
+    pending: data.sponsorships.filter(s => s.status === 'pending_approval').length,
+    approved: data.sponsorships.filter(s => s.status === 'approved').length,
+    rejected: data.sponsorships.filter(s => s.status === 'rejected').length,
+    totalInvestment: data.sponsorships.filter(s => s.status === 'active').reduce((sum, s) => sum + s.price, 0),
+    totalImpressions: data.sponsorships.reduce((sum, s) => sum + s.impressions, 0),
   };
 
   // Stats by type
   const statsByType = {
-    leagues: MOCK_SPONSORSHIPS.filter(s => s.type === 'leagues').length,
-    teams: MOCK_SPONSORSHIPS.filter(s => s.type === 'teams').length,
-    drivers: MOCK_SPONSORSHIPS.filter(s => s.type === 'drivers').length,
-    races: MOCK_SPONSORSHIPS.filter(s => s.type === 'races').length,
-    platform: MOCK_SPONSORSHIPS.filter(s => s.type === 'platform').length,
+    leagues: data.sponsorships.filter(s => s.type === 'leagues').length,
+    teams: data.sponsorships.filter(s => s.type === 'teams').length,
+    drivers: data.sponsorships.filter(s => s.type === 'drivers').length,
+    races: data.sponsorships.filter(s => s.type === 'races').length,
+    platform: data.sponsorships.filter(s => s.type === 'platform').length,
   };
 
   if (loading) {
@@ -796,9 +603,9 @@ export default function SponsorCampaignsPage() {
             const config = status === 'all' 
               ? { label: 'All', color: 'text-gray-400' } 
               : STATUS_CONFIG[status];
-            const count = status === 'all' 
-              ? stats.total 
-              : MOCK_SPONSORSHIPS.filter(s => s.status === status).length;
+            const count = status === 'all'
+              ? stats.total
+              : data.sponsorships.filter(s => s.status === status).length;
             return (
               <button
                 key={status}
diff --git a/apps/website/app/sponsor/dashboard/page.tsx b/apps/website/app/sponsor/dashboard/page.tsx
index f47d59d65..6a3b88829 100644
--- a/apps/website/app/sponsor/dashboard/page.tsx
+++ b/apps/website/app/sponsor/dashboard/page.tsx
@@ -31,52 +31,9 @@ import {
   RefreshCw
 } from 'lucide-react';
 import Link from 'next/link';
-
-// Static mock data for prototype
-const MOCK_SPONSOR_DATA = {
-  sponsorId: 'demo-sponsor-1',
-  sponsorName: 'Acme Racing Co.',
-  metrics: {
-    totalImpressions: 127450,
-    impressionsChange: 12.5,
-    uniqueViewers: 34200,
-    viewersChange: 8.3,
-    activeSponsors: 7,
-    totalInvestment: 4850,
-    avgEngagement: 4.2,
-    engagementChange: 0.8,
-  },
-  sponsorships: {
-    leagues: [
-      { id: 'l1', name: 'GT3 Masters Championship', tier: 'main', drivers: 48, impressions: 45200, status: 'active' },
-      { id: 'l2', name: 'Endurance Pro Series', tier: 'secondary', drivers: 72, impressions: 38400, status: 'active' },
-    ],
-    teams: [
-      { id: 't1', name: 'Velocity Racing', drivers: 4, impressions: 12300, status: 'active' },
-      { id: 't2', name: 'Storm Motorsport', drivers: 3, impressions: 8900, status: 'active' },
-    ],
-    drivers: [
-      { id: 'd1', name: 'Max Velocity', team: 'Velocity Racing', impressions: 8200, status: 'active' },
-      { id: 'd2', name: 'Sarah Storm', team: 'Storm Motorsport', impressions: 6100, status: 'active' },
-    ],
-    races: [
-      { id: 'r1', name: 'Spa 24 Hours', league: 'Endurance Pro', impressions: 15600, date: '2025-12-20', status: 'upcoming' },
-    ],
-    platform: [
-      { id: 'p1', name: 'Homepage Banner', placement: 'Header', impressions: 52000, status: 'active' },
-    ],
-  },
-  recentActivity: [
-    { id: 'a1', type: 'race', message: 'GT3 Masters Championship race completed', time: '2 hours ago', impressions: 1240 },
-    { id: 'a2', type: 'driver', message: 'Max Velocity finished P1 at Monza', time: '5 hours ago', impressions: 890 },
-    { id: 'a3', type: 'league', message: 'New driver joined Endurance Pro Series', time: '1 day ago', impressions: null },
-    { id: 'a4', type: 'team', message: 'Velocity Racing won team championship', time: '2 days ago', impressions: 2100 },
-  ],
-  upcomingRenewals: [
-    { id: 'ren1', name: 'GT3 Masters Championship', type: 'league', renewDate: '2026-01-15', price: 1200 },
-    { id: 'ren2', name: 'Homepage Banner', type: 'platform', renewDate: '2025-12-31', price: 500 },
-  ],
-};
+import { SponsorService } from '@/lib/services/sponsors/SponsorService';
+import { SponsorDashboardViewModel } from '@/lib/view-models/SponsorDashboardViewModel';
+import { ServiceFactory } from '@/lib/services/ServiceFactory';
 
 // Metric Card Component
 function MetricCard({ 
@@ -169,26 +126,18 @@ function SponsorshipCategoryCard({
 }
 
 // Activity Item
-function ActivityItem({ activity }: { activity: typeof MOCK_SPONSOR_DATA.recentActivity[0] }) {
-  const typeColors = {
-    race: 'bg-warning-amber',
-    league: 'bg-primary-blue',
-    team: 'bg-purple-400',
-    driver: 'bg-performance-green',
-    platform: 'bg-racing-red',
-  };
-
+function ActivityItem({ activity }: { activity: any }) {
   return (
     <div className="flex items-start gap-3 py-3 border-b border-charcoal-outline/50 last:border-b-0">
-      <div className={`w-2 h-2 rounded-full mt-2 ${typeColors[activity.type as keyof typeof typeColors] || 'bg-gray-500'}`} />
+      <div className={`w-2 h-2 rounded-full mt-2 ${activity.typeColor}`} />
       <div className="flex-1 min-w-0">
         <p className="text-sm text-white truncate">{activity.message}</p>
         <div className="flex items-center gap-2 mt-1">
           <span className="text-xs text-gray-500">{activity.time}</span>
-          {activity.impressions && (
+          {activity.formattedImpressions && (
             <>
               <span className="text-xs text-gray-600">•</span>
-              <span className="text-xs text-gray-400">{activity.impressions.toLocaleString()} views</span>
+              <span className="text-xs text-gray-400">{activity.formattedImpressions} views</span>
             </>
           )}
         </div>
@@ -198,7 +147,7 @@ function ActivityItem({ activity }: { activity: typeof MOCK_SPONSOR_DATA.recentA
 }
 
 // Renewal Alert
-function RenewalAlert({ renewal }: { renewal: typeof MOCK_SPONSOR_DATA.upcomingRenewals[0] }) {
+function RenewalAlert({ renewal }: { renewal: any }) {
   const typeIcons = {
     league: Trophy,
     team: Users,
@@ -206,7 +155,7 @@ function RenewalAlert({ renewal }: { renewal: typeof MOCK_SPONSOR_DATA.upcomingR
     race: Flag,
     platform: Megaphone,
   };
-  const Icon = typeIcons[renewal.type as keyof typeof typeIcons] || Trophy;
+  const Icon = typeIcons[renewal.type] || Trophy;
 
   return (
     <div className="flex items-center justify-between p-3 rounded-lg bg-warning-amber/10 border border-warning-amber/30">
@@ -214,11 +163,11 @@ function RenewalAlert({ renewal }: { renewal: typeof MOCK_SPONSOR_DATA.upcomingR
         <Icon className="w-4 h-4 text-warning-amber" />
         <div>
           <p className="text-sm text-white">{renewal.name}</p>
-          <p className="text-xs text-gray-400">Renews {renewal.renewDate}</p>
+          <p className="text-xs text-gray-400">Renews {renewal.formattedRenewDate}</p>
         </div>
       </div>
       <div className="text-right">
-        <p className="text-sm font-semibold text-white">${renewal.price}</p>
+        <p className="text-sm font-semibold text-white">{renewal.formattedPrice}</p>
         <Button variant="secondary" className="text-xs mt-1 py-1 px-2 min-h-0">
           Renew
         </Button>
@@ -231,38 +180,52 @@ export default function SponsorDashboardPage() {
   const shouldReduceMotion = useReducedMotion();
   const [timeRange, setTimeRange] = useState<'7d' | '30d' | '90d' | 'all'>('30d');
   const [loading, setLoading] = useState(true);
+  const [data, setData] = useState<SponsorDashboardViewModel | null>(null);
+  const [error, setError] = useState<string | null>(null);
 
-  // Simulate loading
   useEffect(() => {
-    const timer = setTimeout(() => setLoading(false), 500);
-    return () => clearTimeout(timer);
+    const loadDashboard = async () => {
+      try {
+        const sponsorService = ServiceFactory.getSponsorService();
+        const dashboardData = await sponsorService.getSponsorDashboard('demo-sponsor-1');
+        if (dashboardData) {
+          setData(dashboardData);
+        } else {
+          setError('Failed to load dashboard data');
+        }
+      } catch (err) {
+        console.error('Error loading dashboard:', err);
+        setError('Failed to load dashboard data');
+      } finally {
+        setLoading(false);
+      }
+    };
+
+    loadDashboard();
   }, []);
 
-  const data = MOCK_SPONSOR_DATA;
+  if (loading) {
+    return (
+      <div className="max-w-7xl mx-auto py-8 px-4 flex items-center justify-center min-h-[600px]">
+        <div className="text-center">
+          <Loader2 className="w-8 h-8 animate-spin text-primary-blue mx-auto mb-4" />
+          <p className="text-gray-400">Loading dashboard...</p>
+        </div>
+      </div>
+    );
+  }
 
-  // Calculate category totals
-  const categoryData = {
-    leagues: {
-      count: data.sponsorships.leagues.length,
-      impressions: data.sponsorships.leagues.reduce((sum, l) => sum + l.impressions, 0),
-    },
-    teams: {
-      count: data.sponsorships.teams.length,
-      impressions: data.sponsorships.teams.reduce((sum, t) => sum + t.impressions, 0),
-    },
-    drivers: {
-      count: data.sponsorships.drivers.length,
-      impressions: data.sponsorships.drivers.reduce((sum, d) => sum + d.impressions, 0),
-    },
-    races: {
-      count: data.sponsorships.races.length,
-      impressions: data.sponsorships.races.reduce((sum, r) => sum + r.impressions, 0),
-    },
-    platform: {
-      count: data.sponsorships.platform.length,
-      impressions: data.sponsorships.platform.reduce((sum, p) => sum + p.impressions, 0),
-    },
-  };
+  if (error || !data) {
+    return (
+      <div className="max-w-7xl mx-auto py-8 px-4 flex items-center justify-center min-h-[600px]">
+        <div className="text-center">
+          <p className="text-gray-400">{error || 'No dashboard data available'}</p>
+        </div>
+      </div>
+    );
+  }
+
+  const categoryData = data.categoryData;
 
   if (loading) {
     return (
@@ -317,7 +280,7 @@ export default function SponsorDashboardPage() {
       <div className="grid grid-cols-2 md:grid-cols-4 gap-4 mb-8">
         <MetricCard
           title="Total Impressions"
-          value={data.metrics.totalImpressions}
+          value={data.totalImpressions}
           change={data.metrics.impressionsChange}
           icon={Eye}
           delay={0}
@@ -331,15 +294,15 @@ export default function SponsorDashboardPage() {
         />
         <MetricCard
           title="Engagement Rate"
-          value={data.metrics.avgEngagement}
-          change={data.metrics.engagementChange}
+          value={data.metrics.exposure}
+          change={data.metrics.exposureChange}
           icon={TrendingUp}
           suffix="%"
           delay={0.2}
         />
         <MetricCard
           title="Total Investment"
-          value={data.metrics.totalInvestment}
+          value={data.totalInvestment}
           icon={DollarSign}
           prefix="$"
           delay={0.3}
@@ -423,7 +386,7 @@ export default function SponsorDashboardPage() {
                 <div key={league.id} className="flex items-center justify-between p-4 hover:bg-iron-gray/30 transition-colors">
                   <div className="flex items-center gap-4">
                     <div className={`px-2 py-1 rounded text-xs font-medium ${
-                      league.tier === 'main' 
+                      league.tier === 'main'
                         ? 'bg-primary-blue/20 text-primary-blue border border-primary-blue/30'
                         : 'bg-purple-500/20 text-purple-400 border border-purple-500/30'
                     }`}>
@@ -432,17 +395,17 @@ export default function SponsorDashboardPage() {
                     <div>
                       <div className="flex items-center gap-2">
                         <Trophy className="w-4 h-4 text-gray-500" />
-                        <span className="font-medium text-white">{league.name}</span>
+                        <span className="font-medium text-white">{league.entityName}</span>
                       </div>
-                      <div className="text-sm text-gray-500">{league.drivers} drivers</div>
+                      <div className="text-sm text-gray-500">{league.details}</div>
                     </div>
                   </div>
                   <div className="flex items-center gap-4">
                     <div className="text-right">
-                      <div className="font-semibold text-white">{league.impressions.toLocaleString()}</div>
+                      <div className="font-semibold text-white">{league.formattedImpressions}</div>
                       <div className="text-xs text-gray-500">impressions</div>
                     </div>
-                    <Link href={`/sponsor/leagues/${league.id}`}>
+                    <Link href={`/sponsor/leagues/${league.entityId}`}>
                       <Button variant="secondary" className="text-xs">
                         <ExternalLink className="w-3 h-3" />
                       </Button>
@@ -450,7 +413,7 @@ export default function SponsorDashboardPage() {
                   </div>
                 </div>
               ))}
-              
+
               {/* Teams */}
               {data.sponsorships.teams.map((team) => (
                 <div key={team.id} className="flex items-center justify-between p-4 hover:bg-iron-gray/30 transition-colors">
@@ -461,14 +424,14 @@ export default function SponsorDashboardPage() {
                     <div>
                       <div className="flex items-center gap-2">
                         <Users className="w-4 h-4 text-gray-500" />
-                        <span className="font-medium text-white">{team.name}</span>
+                        <span className="font-medium text-white">{team.entityName}</span>
                       </div>
-                      <div className="text-sm text-gray-500">{team.drivers} drivers</div>
+                      <div className="text-sm text-gray-500">{team.details}</div>
                     </div>
                   </div>
                   <div className="flex items-center gap-4">
                     <div className="text-right">
-                      <div className="font-semibold text-white">{team.impressions.toLocaleString()}</div>
+                      <div className="font-semibold text-white">{team.formattedImpressions}</div>
                       <div className="text-xs text-gray-500">impressions</div>
                     </div>
                     <Button variant="secondary" className="text-xs">
@@ -488,14 +451,14 @@ export default function SponsorDashboardPage() {
                     <div>
                       <div className="flex items-center gap-2">
                         <Car className="w-4 h-4 text-gray-500" />
-                        <span className="font-medium text-white">{driver.name}</span>
+                        <span className="font-medium text-white">{driver.entityName}</span>
                       </div>
-                      <div className="text-sm text-gray-500">{driver.team}</div>
+                      <div className="text-sm text-gray-500">{driver.details}</div>
                     </div>
                   </div>
                   <div className="flex items-center gap-4">
                     <div className="text-right">
-                      <div className="font-semibold text-white">{driver.impressions.toLocaleString()}</div>
+                      <div className="font-semibold text-white">{driver.formattedImpressions}</div>
                       <div className="text-xs text-gray-500">impressions</div>
                     </div>
                     <Button variant="secondary" className="text-xs">
@@ -525,8 +488,8 @@ export default function SponsorDashboardPage() {
                           <Flag className="w-5 h-5 text-warning-amber" />
                         </div>
                         <div>
-                          <p className="font-medium text-white">{race.name}</p>
-                          <p className="text-sm text-gray-500">{race.league} • {race.date}</p>
+                          <p className="font-medium text-white">{race.entityName}</p>
+                          <p className="text-sm text-gray-500">{race.details}</p>
                         </div>
                       </div>
                       <div className="text-right">
@@ -620,16 +583,16 @@ export default function SponsorDashboardPage() {
             <div className="space-y-3">
               <div className="flex items-center justify-between">
                 <span className="text-gray-400">Active Sponsorships</span>
-                <span className="font-medium text-white">{data.metrics.activeSponsors}</span>
+                <span className="font-medium text-white">{data.activeSponsorships}</span>
               </div>
               <div className="flex items-center justify-between">
                 <span className="text-gray-400">Total Investment</span>
-                <span className="font-medium text-white">${data.metrics.totalInvestment.toLocaleString()}</span>
+                <span className="font-medium text-white">{data.formattedTotalInvestment}</span>
               </div>
               <div className="flex items-center justify-between">
                 <span className="text-gray-400">Cost per 1K Views</span>
                 <span className="font-medium text-performance-green">
-                  ${(data.metrics.totalInvestment / data.metrics.totalImpressions * 1000).toFixed(2)}
+                  {data.costPerThousandViews}
                 </span>
               </div>
               <div className="flex items-center justify-between">
diff --git a/apps/website/app/sponsor/leagues/[id]/page.tsx b/apps/website/app/sponsor/leagues/[id]/page.tsx
index fe303d5bf..174903d29 100644
--- a/apps/website/app/sponsor/leagues/[id]/page.tsx
+++ b/apps/website/app/sponsor/leagues/[id]/page.tsx
@@ -1,12 +1,15 @@
 'use client';
 
-import { useState } from 'react';
+import { useState, useEffect } from 'react';
 import { useParams, useSearchParams } from 'next/navigation';
 import { motion, useReducedMotion } from 'framer-motion';
 import Link from 'next/link';
 import Card from '@/components/ui/Card';
 import Button from '@/components/ui/Button';
 import { siteConfig } from '@/lib/siteConfig';
+import { LeagueDetailViewModel } from '@/lib/view-models/LeagueDetailViewModel';
+import { SponsorService } from '@/lib/services/sponsors/SponsorService';
+import { ServiceFactory } from '@/lib/services/ServiceFactory';
 import {
   Trophy,
   Users,
@@ -29,64 +32,6 @@ import {
   FileText
 } from 'lucide-react';
 
-// Mock data for league detail
-const MOCK_LEAGUE = {
-  id: 'league-1',
-  name: 'GT3 Masters Championship',
-  game: 'iRacing',
-  tier: 'premium' as const,
-  season: 'Season 3',
-  description: 'Premier GT3 racing with top-tier drivers competing across the world\'s most iconic circuits. Weekly broadcasts and an active community make this league a premium sponsorship opportunity.',
-  drivers: 48,
-  races: 12,
-  completedRaces: 8,
-  totalImpressions: 45200,
-  avgViewsPerRace: 5650,
-  engagement: 4.2,
-  rating: 4.8,
-  seasonStatus: 'active' as const,
-  seasonDates: { start: '2025-10-01', end: '2026-02-28' },
-  nextRace: { name: 'Spa-Francorchamps', date: '2025-12-20' },
-  sponsorSlots: {
-    main: { 
-      available: true, 
-      price: 1200, 
-      benefits: [
-        'Primary logo placement on all liveries',
-        'League page header banner',
-        'Race results page branding',
-        'Social media feature posts',
-        'Newsletter sponsor spot',
-      ]
-    },
-    secondary: { 
-      available: 1, 
-      total: 2, 
-      price: 400,
-      benefits: [
-        'Secondary logo on liveries',
-        'League page sidebar placement',
-        'Race results mention',
-        'Social media mentions',
-      ]
-    },
-  },
-};
-
-const MOCK_DRIVERS = [
-  { id: 'd1', name: 'Max Verstappen', country: 'NL', position: 1, races: 8, impressions: 4200, team: 'Red Bull Racing' },
-  { id: 'd2', name: 'Lewis Hamilton', country: 'GB', position: 2, races: 8, impressions: 3980, team: 'Mercedes AMG' },
-  { id: 'd3', name: 'Charles Leclerc', country: 'MC', position: 3, races: 8, impressions: 3750, team: 'Ferrari' },
-  { id: 'd4', name: 'Lando Norris', country: 'GB', position: 4, races: 7, impressions: 3420, team: 'McLaren' },
-  { id: 'd5', name: 'Carlos Sainz', country: 'ES', position: 5, races: 8, impressions: 3100, team: 'Ferrari' },
-];
-
-const MOCK_RACES = [
-  { id: 'r1', name: 'Spa-Francorchamps', date: '2025-12-20', views: 0, status: 'upcoming' },
-  { id: 'r2', name: 'Monza', date: '2025-12-08', views: 5800, status: 'completed' },
-  { id: 'r3', name: 'Silverstone', date: '2025-11-24', views: 6200, status: 'completed' },
-  { id: 'r4', name: 'Nürburgring', date: '2025-11-10', views: 5400, status: 'completed' },
-];
 
 type TabType = 'overview' | 'drivers' | 'races' | 'sponsor';
 
@@ -94,19 +39,57 @@ export default function SponsorLeagueDetailPage() {
   const params = useParams();
   const searchParams = useSearchParams();
   const shouldReduceMotion = useReducedMotion();
-  
+
   const showSponsorAction = searchParams.get('action') === 'sponsor';
   const [activeTab, setActiveTab] = useState<TabType>(showSponsorAction ? 'sponsor' : 'overview');
   const [selectedTier, setSelectedTier] = useState<'main' | 'secondary'>('main');
+  const [data, setData] = useState<LeagueDetailViewModel | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
 
-  const league = MOCK_LEAGUE;
-  const tierConfig = {
-    premium: { color: 'text-yellow-400', bgColor: 'bg-yellow-500/10', border: 'border-yellow-500/30' },
-    standard: { color: 'text-primary-blue', bgColor: 'bg-primary-blue/10', border: 'border-primary-blue/30' },
-    starter: { color: 'text-gray-400', bgColor: 'bg-gray-500/10', border: 'border-gray-500/30' },
-  };
+  const leagueId = params.id as string;
 
-  const config = tierConfig[league.tier];
+  useEffect(() => {
+    const loadLeagueDetail = async () => {
+      try {
+        const sponsorService = ServiceFactory.getSponsorService();
+        const leagueData = await sponsorService.getLeagueDetail(leagueId);
+        setData(new LeagueDetailViewModel(leagueData));
+      } catch (err) {
+        console.error('Error loading league detail:', err);
+        setError('Failed to load league detail');
+      } finally {
+        setLoading(false);
+      }
+    };
+
+    if (leagueId) {
+      loadLeagueDetail();
+    }
+  }, [leagueId]);
+
+  if (loading) {
+    return (
+      <div className="max-w-7xl mx-auto py-8 px-4 flex items-center justify-center min-h-[400px]">
+        <div className="text-center">
+          <div className="w-8 h-8 border-2 border-primary-blue border-t-transparent rounded-full animate-spin mx-auto mb-4" />
+          <p className="text-gray-400">Loading league details...</p>
+        </div>
+      </div>
+    );
+  }
+
+  if (error || !data) {
+    return (
+      <div className="max-w-7xl mx-auto py-8 px-4 flex items-center justify-center min-h-[400px]">
+        <div className="text-center">
+          <p className="text-gray-400">{error || 'No league data available'}</p>
+        </div>
+      </div>
+    );
+  }
+
+  const config = data.league.tierConfig;
 
   return (
     <div className="max-w-7xl mx-auto py-8 px-4">
@@ -134,9 +117,9 @@ export default function SponsorLeagueDetailPage() {
               <span className="text-sm font-medium text-white">{league.rating}</span>
             </div>
           </div>
-          <h1 className="text-3xl font-bold text-white mb-2">{league.name}</h1>
-          <p className="text-gray-400 mb-4">{league.game} • {league.season} • {league.completedRaces}/{league.races} races completed</p>
-          <p className="text-gray-400 max-w-2xl">{league.description}</p>
+          <h1 className="text-3xl font-bold text-white mb-2">{data.league.name}</h1>
+          <p className="text-gray-400 mb-4">{data.league.game} • {data.league.season} • {data.league.completedRaces}/{data.league.races} races completed</p>
+          <p className="text-gray-400 max-w-2xl">{data.league.description}</p>
         </div>
         
         <div className="flex flex-col sm:flex-row gap-3">
@@ -167,7 +150,7 @@ export default function SponsorLeagueDetailPage() {
                 <Eye className="w-5 h-5 text-primary-blue" />
               </div>
               <div>
-                <div className="text-xl font-bold text-white">{league.totalImpressions.toLocaleString()}</div>
+                <div className="text-xl font-bold text-white">{data.league.formattedTotalImpressions}</div>
                 <div className="text-xs text-gray-400">Total Views</div>
               </div>
             </div>
@@ -184,7 +167,7 @@ export default function SponsorLeagueDetailPage() {
                 <TrendingUp className="w-5 h-5 text-performance-green" />
               </div>
               <div>
-                <div className="text-xl font-bold text-white">{league.avgViewsPerRace.toLocaleString()}</div>
+                <div className="text-xl font-bold text-white">{data.league.formattedAvgViewsPerRace}</div>
                 <div className="text-xs text-gray-400">Avg/Race</div>
               </div>
             </div>
@@ -201,7 +184,7 @@ export default function SponsorLeagueDetailPage() {
                 <Users className="w-5 h-5 text-purple-400" />
               </div>
               <div>
-                <div className="text-xl font-bold text-white">{league.drivers}</div>
+                <div className="text-xl font-bold text-white">{data.league.drivers}</div>
                 <div className="text-xs text-gray-400">Drivers</div>
               </div>
             </div>
@@ -218,7 +201,7 @@ export default function SponsorLeagueDetailPage() {
                 <BarChart3 className="w-5 h-5 text-warning-amber" />
               </div>
               <div>
-                <div className="text-xl font-bold text-white">{league.engagement}%</div>
+                <div className="text-xl font-bold text-white">{data.league.engagement}%</div>
                 <div className="text-xs text-gray-400">Engagement</div>
               </div>
             </div>
@@ -235,7 +218,7 @@ export default function SponsorLeagueDetailPage() {
                 <Calendar className="w-5 h-5 text-racing-red" />
               </div>
               <div>
-                <div className="text-xl font-bold text-white">{league.races - league.completedRaces}</div>
+                <div className="text-xl font-bold text-white">{data.league.racesLeft}</div>
                 <div className="text-xs text-gray-400">Races Left</div>
               </div>
             </div>
@@ -271,7 +254,7 @@ export default function SponsorLeagueDetailPage() {
             <div className="space-y-3">
               <div className="flex justify-between py-2 border-b border-charcoal-outline/50">
                 <span className="text-gray-400">Platform</span>
-                <span className="text-white font-medium">{league.game}</span>
+                <span className="text-white font-medium">{data.league.game}</span>
               </div>
               <div className="flex justify-between py-2 border-b border-charcoal-outline/50">
                 <span className="text-gray-400">Season</span>
@@ -300,16 +283,16 @@ export default function SponsorLeagueDetailPage() {
             <div className="space-y-3">
               <div className="flex justify-between py-2 border-b border-charcoal-outline/50">
                 <span className="text-gray-400">Total Season Views</span>
-                <span className="text-white font-medium">{league.totalImpressions.toLocaleString()}</span>
+                <span className="text-white font-medium">{data.league.formattedTotalImpressions}</span>
               </div>
               <div className="flex justify-between py-2 border-b border-charcoal-outline/50">
                 <span className="text-gray-400">Projected Total</span>
-                <span className="text-white font-medium">{Math.round(league.avgViewsPerRace * league.races).toLocaleString()}</span>
+                <span className="text-white font-medium">{data.league.formattedProjectedTotal}</span>
               </div>
               <div className="flex justify-between py-2 border-b border-charcoal-outline/50">
                 <span className="text-gray-400">Main Sponsor CPM</span>
                 <span className="text-performance-green font-medium">
-                  ${((league.sponsorSlots.main.price / (league.avgViewsPerRace * league.races)) * 1000).toFixed(2)}
+                  {data.league.formattedMainSponsorCpm}
                 </span>
               </div>
               <div className="flex justify-between py-2 border-b border-charcoal-outline/50">
@@ -359,7 +342,7 @@ export default function SponsorLeagueDetailPage() {
             <p className="text-sm text-gray-400">Top drivers carrying sponsor branding</p>
           </div>
           <div className="divide-y divide-charcoal-outline/50">
-            {MOCK_DRIVERS.map((driver) => (
+            {data.drivers.map((driver) => (
               <div key={driver.id} className="flex items-center justify-between p-4 hover:bg-iron-gray/30 transition-colors">
                 <div className="flex items-center gap-4">
                   <div className="w-10 h-10 rounded-full bg-iron-gray flex items-center justify-center text-lg font-bold text-white">
@@ -376,7 +359,7 @@ export default function SponsorLeagueDetailPage() {
                     <div className="text-xs text-gray-500">races</div>
                   </div>
                   <div className="text-right">
-                    <div className="font-semibold text-white">{driver.impressions.toLocaleString()}</div>
+                    <div className="font-semibold text-white">{driver.formattedImpressions}</div>
                     <div className="text-xs text-gray-500">views</div>
                   </div>
                 </div>
@@ -393,7 +376,7 @@ export default function SponsorLeagueDetailPage() {
             <p className="text-sm text-gray-400">Season schedule with view statistics</p>
           </div>
           <div className="divide-y divide-charcoal-outline/50">
-            {MOCK_RACES.map((race) => (
+            {data.races.map((race) => (
               <div key={race.id} className="flex items-center justify-between p-4 hover:bg-iron-gray/30 transition-colors">
                 <div className="flex items-center gap-4">
                   <div className={`w-3 h-3 rounded-full ${
diff --git a/apps/website/app/sponsor/leagues/page.tsx b/apps/website/app/sponsor/leagues/page.tsx
index 082575233..7062c4cd6 100644
--- a/apps/website/app/sponsor/leagues/page.tsx
+++ b/apps/website/app/sponsor/leagues/page.tsx
@@ -1,11 +1,14 @@
 'use client';
 
-import { useState } from 'react';
+import { useState, useEffect } from 'react';
 import { motion, useReducedMotion } from 'framer-motion';
 import Link from 'next/link';
 import Card from '@/components/ui/Card';
 import Button from '@/components/ui/Button';
 import { siteConfig } from '@/lib/siteConfig';
+import { AvailableLeaguesViewModel } from '@/lib/view-models/AvailableLeaguesViewModel';
+import { SponsorService } from '@/lib/services/sponsors/SponsorService';
+import { ServiceFactory } from '@/lib/services/ServiceFactory';
 import { 
   Trophy, 
   Users, 
@@ -38,98 +41,12 @@ interface AvailableLeague {
   description: string;
 }
 
-const MOCK_AVAILABLE_LEAGUES: AvailableLeague[] = [
-  {
-    id: 'league-1',
-    name: 'GT3 Masters Championship',
-    game: 'iRacing',
-    drivers: 48,
-    avgViewsPerRace: 8200,
-    mainSponsorSlot: { available: true, price: 1200 },
-    secondarySlots: { available: 1, total: 2, price: 400 },
-    rating: 4.8,
-    tier: 'premium',
-    nextRace: 'Dec 20 - Spa',
-    seasonStatus: 'active',
-    description: 'Premier GT3 racing with top-tier drivers. Weekly broadcasts and active community.',
-  },
-  {
-    id: 'league-2',
-    name: 'Endurance Pro Series',
-    game: 'ACC',
-    drivers: 72,
-    avgViewsPerRace: 12500,
-    mainSponsorSlot: { available: false, price: 1500 },
-    secondarySlots: { available: 2, total: 2, price: 500 },
-    rating: 4.9,
-    tier: 'premium',
-    nextRace: 'Jan 5 - Nürburgring 24h',
-    seasonStatus: 'active',
-    description: 'Multi-class endurance racing. High engagement from dedicated endurance fans.',
-  },
-  {
-    id: 'league-3',
-    name: 'Formula Sim League',
-    game: 'iRacing',
-    drivers: 24,
-    avgViewsPerRace: 5400,
-    mainSponsorSlot: { available: true, price: 800 },
-    secondarySlots: { available: 2, total: 2, price: 300 },
-    rating: 4.5,
-    tier: 'standard',
-    nextRace: 'Dec 22 - Monza',
-    seasonStatus: 'active',
-    description: 'Open-wheel racing excellence. Competitive field with consistent racing.',
-  },
-  {
-    id: 'league-4',
-    name: 'Touring Car Masters',
-    game: 'rFactor 2',
-    drivers: 32,
-    avgViewsPerRace: 3200,
-    mainSponsorSlot: { available: true, price: 500 },
-    secondarySlots: { available: 2, total: 2, price: 200 },
-    rating: 4.2,
-    tier: 'starter',
-    nextRace: 'Jan 10 - Brands Hatch',
-    seasonStatus: 'upcoming',
-    description: 'Touring car action with close racing. Great for building brand awareness.',
-  },
-  {
-    id: 'league-5',
-    name: 'LMP Challenge',
-    game: 'Le Mans Ultimate',
-    drivers: 36,
-    avgViewsPerRace: 6800,
-    mainSponsorSlot: { available: true, price: 900 },
-    secondarySlots: { available: 1, total: 2, price: 350 },
-    rating: 4.6,
-    tier: 'standard',
-    nextRace: 'Dec 28 - Sebring',
-    seasonStatus: 'active',
-    description: 'Prototype racing at its finest. Growing community with passionate fans.',
-  },
-  {
-    id: 'league-6',
-    name: 'Rally Championship',
-    game: 'EA WRC',
-    drivers: 28,
-    avgViewsPerRace: 4500,
-    mainSponsorSlot: { available: true, price: 650 },
-    secondarySlots: { available: 2, total: 2, price: 250 },
-    rating: 4.4,
-    tier: 'standard',
-    nextRace: 'Jan 15 - Monte Carlo',
-    seasonStatus: 'upcoming',
-    description: 'Thrilling rally stages. Unique sponsorship exposure in rallying content.',
-  },
-];
 
 type SortOption = 'rating' | 'drivers' | 'price' | 'views';
 type TierFilter = 'all' | 'premium' | 'standard' | 'starter';
 type AvailabilityFilter = 'all' | 'main' | 'secondary';
 
-function LeagueCard({ league, index }: { league: AvailableLeague; index: number }) {
+function LeagueCard({ league, index }: { league: any; index: number }) {
   const shouldReduceMotion = useReducedMotion();
   
   const tierConfig = {
@@ -159,9 +76,8 @@ function LeagueCard({ league, index }: { league: AvailableLeague; index: number
     completed: { color: 'text-gray-400', bg: 'bg-gray-400/10', label: 'Season Ended' },
   };
 
-  const config = tierConfig[league.tier];
-  const status = statusConfig[league.seasonStatus];
-  const cpm = (league.mainSponsorSlot.price / league.avgViewsPerRace * 1000).toFixed(0);
+  const config = league.tierConfig;
+  const status = league.statusConfig;
 
   return (
     <motion.div
@@ -201,11 +117,11 @@ function LeagueCard({ league, index }: { league: AvailableLeague; index: number
               <div className="text-xs text-gray-500">Drivers</div>
             </div>
             <div className="text-center p-2 bg-iron-gray/50 rounded-lg">
-              <div className="text-lg font-bold text-white">{(league.avgViewsPerRace / 1000).toFixed(1)}k</div>
+              <div className="text-lg font-bold text-white">{league.formattedAvgViews}</div>
               <div className="text-xs text-gray-500">Avg Views</div>
             </div>
             <div className="text-center p-2 bg-iron-gray/50 rounded-lg">
-              <div className="text-lg font-bold text-performance-green">${cpm}</div>
+              <div className="text-lg font-bold text-performance-green">{league.formattedCpm}</div>
               <div className="text-xs text-gray-500">CPM</div>
             </div>
           </div>
@@ -282,9 +198,50 @@ export default function SponsorLeaguesPage() {
   const [tierFilter, setTierFilter] = useState<TierFilter>('all');
   const [availabilityFilter, setAvailabilityFilter] = useState<AvailabilityFilter>('all');
   const [sortBy, setSortBy] = useState<SortOption>('rating');
+  const [data, setData] = useState<AvailableLeaguesViewModel | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    const loadLeagues = async () => {
+      try {
+        const sponsorService = ServiceFactory.getSponsorService();
+        const leaguesData = await sponsorService.getAvailableLeagues();
+        setData(new AvailableLeaguesViewModel(leaguesData));
+      } catch (err) {
+        console.error('Error loading leagues:', err);
+        setError('Failed to load leagues data');
+      } finally {
+        setLoading(false);
+      }
+    };
+
+    loadLeagues();
+  }, []);
+
+  if (loading) {
+    return (
+      <div className="max-w-7xl mx-auto py-8 px-4 flex items-center justify-center min-h-[400px]">
+        <div className="text-center">
+          <div className="w-8 h-8 border-2 border-primary-blue border-t-transparent rounded-full animate-spin mx-auto mb-4" />
+          <p className="text-gray-400">Loading leagues...</p>
+        </div>
+      </div>
+    );
+  }
+
+  if (error || !data) {
+    return (
+      <div className="max-w-7xl mx-auto py-8 px-4 flex items-center justify-center min-h-[400px]">
+        <div className="text-center">
+          <p className="text-gray-400">{error || 'No leagues data available'}</p>
+        </div>
+      </div>
+    );
+  }
 
   // Filter and sort leagues
-  const filteredLeagues = MOCK_AVAILABLE_LEAGUES
+  const filteredLeagues = data.leagues
     .filter(league => {
       if (searchQuery && !league.name.toLowerCase().includes(searchQuery.toLowerCase())) {
         return false;
@@ -312,13 +269,12 @@ export default function SponsorLeaguesPage() {
 
   // Calculate summary stats
   const stats = {
-    total: MOCK_AVAILABLE_LEAGUES.length,
-    mainAvailable: MOCK_AVAILABLE_LEAGUES.filter(l => l.mainSponsorSlot.available).length,
-    secondaryAvailable: MOCK_AVAILABLE_LEAGUES.reduce((sum, l) => sum + l.secondarySlots.available, 0),
-    totalDrivers: MOCK_AVAILABLE_LEAGUES.reduce((sum, l) => sum + l.drivers, 0),
+    total: data.leagues.length,
+    mainAvailable: data.leagues.filter(l => l.mainSponsorSlot.available).length,
+    secondaryAvailable: data.leagues.reduce((sum, l) => sum + l.secondarySlots.available, 0),
+    totalDrivers: data.leagues.reduce((sum, l) => sum + l.drivers, 0),
     avgCpm: Math.round(
-      MOCK_AVAILABLE_LEAGUES.reduce((sum, l) => sum + (l.mainSponsorSlot.price / l.avgViewsPerRace * 1000), 0) / 
-      MOCK_AVAILABLE_LEAGUES.length
+      data.leagues.reduce((sum, l) => sum + l.cpm, 0) / data.leagues.length
     ),
   };
 
@@ -448,7 +404,7 @@ export default function SponsorLeaguesPage() {
       {/* Results Count */}
       <div className="flex items-center justify-between mb-6">
         <p className="text-sm text-gray-400">
-          Showing {filteredLeagues.length} of {MOCK_AVAILABLE_LEAGUES.length} leagues
+          Showing {filteredLeagues.length} of {data.leagues.length} leagues
         </p>
         <div className="flex items-center gap-2">
           <Link href="/teams">
diff --git a/apps/website/lib/api/sponsors/SponsorsApiClient.ts b/apps/website/lib/api/sponsors/SponsorsApiClient.ts
index 1e8c94d25..b75a1583b 100644
--- a/apps/website/lib/api/sponsors/SponsorsApiClient.ts
+++ b/apps/website/lib/api/sponsors/SponsorsApiClient.ts
@@ -63,4 +63,41 @@ export class SponsorsApiClient extends BaseApiClient {
   rejectSponsorshipRequest(requestId: string, input: RejectSponsorshipRequestInputDTO): Promise<void> {
     return this.post(`/sponsors/requests/${requestId}/reject`, input);
   }
+
+  /** Get sponsor billing information */
+  getBilling(sponsorId: string): Promise<{
+    paymentMethods: any[];
+    invoices: any[];
+    stats: any;
+  }> {
+    return this.get(`/sponsors/billing/${sponsorId}`);
+  }
+
+  /** Get available leagues for sponsorship */
+  getAvailableLeagues(): Promise<any[]> {
+    return this.get('/sponsors/leagues/available');
+  }
+
+  /** Get detailed league information */
+  getLeagueDetail(leagueId: string): Promise<{
+    league: any;
+    drivers: any[];
+    races: any[];
+  }> {
+    return this.get(`/sponsors/leagues/${leagueId}/detail`);
+  }
+
+  /** Get sponsor settings */
+  getSettings(sponsorId: string): Promise<{
+    profile: any;
+    notifications: any;
+    privacy: any;
+  }> {
+    return this.get(`/sponsors/settings/${sponsorId}`);
+  }
+
+  /** Update sponsor settings */
+  updateSettings(sponsorId: string, input: any): Promise<void> {
+    return this.put(`/sponsors/settings/${sponsorId}`, input);
+  }
 }
\ No newline at end of file
diff --git a/apps/website/lib/command-models/auth/LoginCommandModel.ts b/apps/website/lib/command-models/auth/LoginCommandModel.ts
new file mode 100644
index 000000000..b565d6afb
--- /dev/null
+++ b/apps/website/lib/command-models/auth/LoginCommandModel.ts
@@ -0,0 +1,66 @@
+export interface LoginFormData {
+  email: string;
+  password: string;
+}
+
+export interface LoginValidationErrors {
+  email?: string;
+  password?: string;
+}
+
+/**
+ * LoginCommandModel
+ *
+ * Encapsulates login form state, client-side validation, and
+ * prepares data for submission to the AuthService.
+ */
+export class LoginCommandModel {
+  private _email: string;
+  private _password: string;
+
+  constructor(initial: LoginFormData = { email: '', password: '' }) {
+    this._email = initial.email;
+    this._password = initial.password;
+  }
+
+  get email(): string {
+    return this._email;
+  }
+
+  set email(value: string) {
+    this._email = value;
+  }
+
+  get password(): string {
+    return this._password;
+  }
+
+  set password(value: string) {
+    this._password = value;
+  }
+
+  /** Basic client-side validation for login form */
+  validate(): LoginValidationErrors {
+    const errors: LoginValidationErrors = {};
+
+    if (!this._email.trim()) {
+      errors.email = 'Email is required';
+    } else if (!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(this._email)) {
+      errors.email = 'Invalid email format';
+    }
+
+    if (!this._password) {
+      errors.password = 'Password is required';
+    }
+
+    return errors;
+  }
+
+  /** Convert to API LoginParams DTO */
+  toRequestDto(): { email: string; password: string } {
+    return {
+      email: this._email,
+      password: this._password,
+    };
+  }
+}
diff --git a/apps/website/lib/command-models/auth/SignupCommandModel.ts b/apps/website/lib/command-models/auth/SignupCommandModel.ts
new file mode 100644
index 000000000..cd4356f8e
--- /dev/null
+++ b/apps/website/lib/command-models/auth/SignupCommandModel.ts
@@ -0,0 +1,89 @@
+export interface SignupFormData {
+  displayName: string;
+  email: string;
+  password: string;
+  confirmPassword: string;
+}
+
+export interface SignupValidationErrors {
+  displayName?: string;
+  email?: string;
+  password?: string;
+  confirmPassword?: string;
+}
+
+/**
+ * SignupCommandModel
+ *
+ * Encapsulates signup form state, client-side validation, and
+ * prepares data for submission to the AuthService.
+ */
+export class SignupCommandModel {
+  private _displayName: string;
+  private _email: string;
+  private _password: string;
+  private _confirmPassword: string;
+
+  constructor(initial: SignupFormData) {
+    this._displayName = initial.displayName;
+    this._email = initial.email;
+    this._password = initial.password;
+    this._confirmPassword = initial.confirmPassword;
+  }
+
+  get displayName(): string {
+    return this._displayName;
+  }
+
+  get email(): string {
+    return this._email;
+  }
+
+  get password(): string {
+    return this._password;
+  }
+
+  get confirmPassword(): string {
+    return this._confirmPassword;
+  }
+
+  /** Basic client-side validation for signup form */
+  validate(): SignupValidationErrors {
+    const errors: SignupValidationErrors = {};
+
+    if (!this._displayName.trim()) {
+      errors.displayName = 'Display name is required';
+    } else if (this._displayName.trim().length < 3) {
+      errors.displayName = 'Display name must be at least 3 characters';
+    }
+
+    if (!this._email.trim()) {
+      errors.email = 'Email is required';
+    } else if (!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(this._email)) {
+      errors.email = 'Invalid email format';
+    }
+
+    if (!this._password) {
+      errors.password = 'Password is required';
+    } else if (this._password.length < 8) {
+      errors.password = 'Password must be at least 8 characters';
+    }
+
+    if (!this._confirmPassword) {
+      errors.confirmPassword = 'Please confirm your password';
+    } else if (this._password !== this._confirmPassword) {
+      errors.confirmPassword = 'Passwords do not match';
+    }
+
+    return errors;
+  }
+
+  /** Convert to API SignupParams DTO */
+  toRequestDto(): { email: string; password: string; displayName: string } {
+    return {
+      email: this._email,
+      password: this._password,
+      displayName: this._displayName,
+    };
+  }
+}
diff --git a/apps/website/lib/services/landing/LandingService.ts b/apps/website/lib/services/landing/LandingService.ts
new file mode 100644
index 000000000..2cde9ed7c
--- /dev/null
+++ b/apps/website/lib/services/landing/LandingService.ts
@@ -0,0 +1,79 @@
+import { RacesApiClient } from '@/lib/api/races/RacesApiClient';
+import { LeaguesApiClient } from '@/lib/api/leagues/LeaguesApiClient';
+import { TeamsApiClient } from '@/lib/api/teams/TeamsApiClient';
+import type { LeagueSummaryDTO } from '@/lib/types/generated/LeagueSummaryDTO';
+import type { GetAllTeamsOutputDTO, TeamListItemDTO } from '@/lib/types/generated/GetAllTeamsOutputDTO';
+import { RacesPageViewModel } from '@/lib/view-models/RacesPageViewModel';
+import { HomeDiscoveryViewModel } from '@/lib/view-models/HomeDiscoveryViewModel';
+import { LeagueCardViewModel } from '@/lib/view-models/LeagueCardViewModel';
+import { TeamCardViewModel } from '@/lib/view-models/TeamCardViewModel';
+import { UpcomingRaceCardViewModel } from '@/lib/view-models/UpcomingRaceCardViewModel';
+
+// DTO matching backend RacesPageDataDTO for discovery usage
+interface RacesPageDataDTO {
+  races: {
+    id: string;
+    track: string;
+    car: string;
+    scheduledAt: string;
+    status: string;
+    leagueId: string;
+    leagueName: string;
+    strengthOfField: number | null;
+    isUpcoming: boolean;
+    isLive: boolean;
+    isPast: boolean;
+  }[];
+}
+
+export class LandingService {
+  constructor(
+    private readonly racesApi: RacesApiClient,
+    private readonly leaguesApi: LeaguesApiClient,
+    private readonly teamsApi: TeamsApiClient,
+  ) {}
+
+  async getHomeDiscovery(): Promise<HomeDiscoveryViewModel> {
+    const [racesDto, leaguesDto, teamsDto] = await Promise.all([
+      this.racesApi.getPageData() as Promise<RacesPageDataDTO>,
+      this.leaguesApi.getAllWithCapacity() as Promise<{ leagues: LeagueSummaryDTO[] }>,
+      this.teamsApi.getAll(),
+    ]);
+
+    const racesVm = new RacesPageViewModel(racesDto);
+
+    const topLeagues = leaguesDto.leagues.slice(0, 4).map(
+      league => new LeagueCardViewModel({
+        id: league.id,
+        name: league.name,
+        description: 'Competitive iRacing league',
+      }),
+    );
+
+    const teams = (teamsDto as GetAllTeamsOutputDTO).teams.slice(0, 4).map(
+      (team: TeamListItemDTO) =>
+        new TeamCardViewModel({
+          id: team.id,
+          name: team.name,
+          tag: team.tag,
+          description: team.description,
+        }),
+    );
+
+    const upcomingRaces = racesVm.upcomingRaces.slice(0, 4).map(
+      race =>
+        new UpcomingRaceCardViewModel({
+          id: race.id,
+          track: race.track,
+          car: race.car,
+          scheduledAt: race.scheduledAt,
+        }),
+    );
+
+    return new HomeDiscoveryViewModel({
+      topLeagues,
+      teams,
+      upcomingRaces,
+    });
+  }
+}
diff --git a/apps/website/lib/services/sponsors/SponsorService.ts b/apps/website/lib/services/sponsors/SponsorService.ts
index 2eec40961..059154546 100644
--- a/apps/website/lib/services/sponsors/SponsorService.ts
+++ b/apps/website/lib/services/sponsors/SponsorService.ts
@@ -58,4 +58,51 @@ export class SponsorService {
   async getSponsorshipPricing(): Promise<GetEntitySponsorshipPricingResultDto> {
     return await this.apiClient.getPricing();
   }
+
+  /**
+   * Get sponsor billing information
+   */
+  async getBilling(sponsorId: string): Promise<{
+    paymentMethods: any[];
+    invoices: any[];
+    stats: any;
+  }> {
+    return await this.apiClient.getBilling(sponsorId);
+  }
+
+  /**
+   * Get available leagues for sponsorship
+   */
+  async getAvailableLeagues(): Promise<any[]> {
+    return await this.apiClient.getAvailableLeagues();
+  }
+
+  /**
+   * Get detailed league information
+   */
+  async getLeagueDetail(leagueId: string): Promise<{
+    league: any;
+    drivers: any[];
+    races: any[];
+  }> {
+    return await this.apiClient.getLeagueDetail(leagueId);
+  }
+
+  /**
+   * Get sponsor settings
+   */
+  async getSettings(sponsorId: string): Promise<{
+    profile: any;
+    notifications: any;
+    privacy: any;
+  }> {
+    return await this.apiClient.getSettings(sponsorId);
+  }
+
+  /**
+   * Update sponsor settings
+   */
+  async updateSettings(sponsorId: string, input: any): Promise<void> {
+    return await this.apiClient.updateSettings(sponsorId, input);
+  }
 }
\ No newline at end of file
diff --git a/apps/website/lib/view-models/ActivityItemViewModel.ts b/apps/website/lib/view-models/ActivityItemViewModel.ts
new file mode 100644
index 000000000..22ab385b2
--- /dev/null
+++ b/apps/website/lib/view-models/ActivityItemViewModel.ts
@@ -0,0 +1,35 @@
+/**
+ * Activity Item View Model
+ *
+ * View model for recent activity items.
+ */
+export class ActivityItemViewModel {
+  id: string;
+  type: 'race' | 'league' | 'team' | 'driver' | 'platform';
+  message: string;
+  time: string;
+  impressions?: number;
+
+  constructor(data: any) {
+    this.id = data.id;
+    this.type = data.type;
+    this.message = data.message;
+    this.time = data.time;
+    this.impressions = data.impressions;
+  }
+
+  get typeColor(): string {
+    const colors = {
+      race: 'bg-warning-amber',
+      league: 'bg-primary-blue',
+      team: 'bg-purple-400',
+      driver: 'bg-performance-green',
+      platform: 'bg-racing-red',
+    };
+    return colors[this.type] || 'bg-gray-500';
+  }
+
+  get formattedImpressions(): string | null {
+    return this.impressions ? this.impressions.toLocaleString() : null;
+  }
+}
\ No newline at end of file
diff --git a/apps/website/lib/view-models/AvailableLeaguesViewModel.ts b/apps/website/lib/view-models/AvailableLeaguesViewModel.ts
new file mode 100644
index 000000000..e26b7522d
--- /dev/null
+++ b/apps/website/lib/view-models/AvailableLeaguesViewModel.ts
@@ -0,0 +1,76 @@
+/**
+ * Available Leagues View Model
+ *
+ * View model for leagues available for sponsorship.
+ */
+export class AvailableLeaguesViewModel {
+  leagues: AvailableLeagueViewModel[];
+
+  constructor(leagues: any[]) {
+    this.leagues = leagues.map(league => new AvailableLeagueViewModel(league));
+  }
+}
+
+export class AvailableLeagueViewModel {
+  id: string;
+  name: string;
+  game: string;
+  drivers: number;
+  avgViewsPerRace: number;
+  mainSponsorSlot: { available: boolean; price: number };
+  secondarySlots: { available: number; total: number; price: number };
+  rating: number;
+  tier: 'premium' | 'standard' | 'starter';
+  nextRace?: string;
+  seasonStatus: 'active' | 'upcoming' | 'completed';
+  description: string;
+
+  constructor(data: any) {
+    this.id = data.id;
+    this.name = data.name;
+    this.game = data.game;
+    this.drivers = data.drivers;
+    this.avgViewsPerRace = data.avgViewsPerRace;
+    this.mainSponsorSlot = data.mainSponsorSlot;
+    this.secondarySlots = data.secondarySlots;
+    this.rating = data.rating;
+    this.tier = data.tier;
+    this.nextRace = data.nextRace;
+    this.seasonStatus = data.seasonStatus;
+    this.description = data.description;
+  }
+
+  get formattedAvgViews(): string {
+    return `${(this.avgViewsPerRace / 1000).toFixed(1)}k`;
+  }
+
+  get cpm(): number {
+    return Math.round((this.mainSponsorSlot.price / this.avgViewsPerRace) * 1000);
+  }
+
+  get formattedCpm(): string {
+    return `$${this.cpm}`;
+  }
+
+  get hasAvailableSlots(): boolean {
+    return this.mainSponsorSlot.available || this.secondarySlots.available > 0;
+  }
+
+  get tierConfig() {
+    const configs = {
+      premium: { color: 'text-yellow-400', bgColor: 'bg-yellow-500/10', border: 'border-yellow-500/30', icon: '⭐' },
+      standard: { color: 'text-primary-blue', bgColor: 'bg-primary-blue/10', border: 'border-primary-blue/30', icon: '🏆' },
+      starter: { color: 'text-gray-400', bgColor: 'bg-gray-500/10', border: 'border-gray-500/30', icon: '🚀' },
+    };
+    return configs[this.tier];
+  }
+
+  get statusConfig() {
+    const configs = {
+      active: { color: 'text-performance-green', bg: 'bg-performance-green/10', label: 'Active Season' },
+      upcoming: { color: 'text-warning-amber', bg: 'bg-warning-amber/10', label: 'Starting Soon' },
+      completed: { color: 'text-gray-400', bg: 'bg-gray-400/10', label: 'Season Ended' },
+    };
+    return configs[this.seasonStatus];
+  }
+}
\ No newline at end of file
diff --git a/apps/website/lib/view-models/BillingViewModel.ts b/apps/website/lib/view-models/BillingViewModel.ts
new file mode 100644
index 000000000..41e4848b8
--- /dev/null
+++ b/apps/website/lib/view-models/BillingViewModel.ts
@@ -0,0 +1,138 @@
+/**
+ * Billing View Model
+ *
+ * View model for sponsor billing data with UI-specific transformations.
+ */
+export class BillingViewModel {
+  paymentMethods: PaymentMethodViewModel[];
+  invoices: InvoiceViewModel[];
+  stats: BillingStatsViewModel;
+
+  constructor(data: {
+    paymentMethods: any[];
+    invoices: any[];
+    stats: any;
+  }) {
+    this.paymentMethods = data.paymentMethods.map(pm => new PaymentMethodViewModel(pm));
+    this.invoices = data.invoices.map(inv => new InvoiceViewModel(inv));
+    this.stats = new BillingStatsViewModel(data.stats);
+  }
+}
+
+export class PaymentMethodViewModel {
+  id: string;
+  type: 'card' | 'bank' | 'sepa';
+  last4: string;
+  brand?: string;
+  isDefault: boolean;
+  expiryMonth?: number;
+  expiryYear?: number;
+  bankName?: string;
+
+  constructor(data: any) {
+    this.id = data.id;
+    this.type = data.type;
+    this.last4 = data.last4;
+    this.brand = data.brand;
+    this.isDefault = data.isDefault;
+    this.expiryMonth = data.expiryMonth;
+    this.expiryYear = data.expiryYear;
+    this.bankName = data.bankName;
+  }
+
+  get displayLabel(): string {
+    if (this.type === 'sepa' && this.bankName) {
+      return `${this.bankName} •••• ${this.last4}`;
+    }
+    return `${this.brand} •••• ${this.last4}`;
+  }
+
+  get expiryDisplay(): string | null {
+    if (this.expiryMonth && this.expiryYear) {
+      return `${String(this.expiryMonth).padStart(2, '0')}/${this.expiryYear}`;
+    }
+    return null;
+  }
+}
+
+export class InvoiceViewModel {
+  id: string;
+  invoiceNumber: string;
+  date: Date;
+  dueDate: Date;
+  amount: number;
+  vatAmount: number;
+  totalAmount: number;
+  status: 'paid' | 'pending' | 'overdue' | 'failed';
+  description: string;
+  sponsorshipType: 'league' | 'team' | 'driver' | 'race' | 'platform';
+  pdfUrl: string;
+
+  constructor(data: any) {
+    this.id = data.id;
+    this.invoiceNumber = data.invoiceNumber;
+    this.date = new Date(data.date);
+    this.dueDate = new Date(data.dueDate);
+    this.amount = data.amount;
+    this.vatAmount = data.vatAmount;
+    this.totalAmount = data.totalAmount;
+    this.status = data.status;
+    this.description = data.description;
+    this.sponsorshipType = data.sponsorshipType;
+    this.pdfUrl = data.pdfUrl;
+  }
+
+  get formattedTotalAmount(): string {
+    return `€${this.totalAmount.toLocaleString('de-DE', { minimumFractionDigits: 2 })}`;
+  }
+
+  get formattedVatAmount(): string {
+    return `€${this.vatAmount.toLocaleString('de-DE', { minimumFractionDigits: 2 })}`;
+  }
+
+  get formattedDate(): string {
+    return this.date.toLocaleDateString('en-US', { month: 'short', day: 'numeric', year: 'numeric' });
+  }
+
+  get isOverdue(): boolean {
+    return this.status === 'overdue' || (this.status === 'pending' && new Date() > this.dueDate);
+  }
+}
+
+export class BillingStatsViewModel {
+  totalSpent: number;
+  pendingAmount: number;
+  nextPaymentDate: Date;
+  nextPaymentAmount: number;
+  activeSponsorships: number;
+  averageMonthlySpend: number;
+
+  constructor(data: any) {
+    this.totalSpent = data.totalSpent;
+    this.pendingAmount = data.pendingAmount;
+    this.nextPaymentDate = new Date(data.nextPaymentDate);
+    this.nextPaymentAmount = data.nextPaymentAmount;
+    this.activeSponsorships = data.activeSponsorships;
+    this.averageMonthlySpend = data.averageMonthlySpend;
+  }
+
+  get formattedTotalSpent(): string {
+    return `€${this.totalSpent.toLocaleString('de-DE')}`;
+  }
+
+  get formattedPendingAmount(): string {
+    return `€${this.pendingAmount.toLocaleString('de-DE', { minimumFractionDigits: 2 })}`;
+  }
+
+  get formattedNextPaymentAmount(): string {
+    return `€${this.nextPaymentAmount.toLocaleString('de-DE', { minimumFractionDigits: 2 })}`;
+  }
+
+  get formattedAverageMonthlySpend(): string {
+    return `€${this.averageMonthlySpend.toLocaleString('de-DE')}`;
+  }
+
+  get formattedNextPaymentDate(): string {
+    return this.nextPaymentDate.toLocaleDateString('en-US', { month: 'short', day: 'numeric' });
+  }
+}
\ No newline at end of file
diff --git a/apps/website/lib/view-models/HomeDiscoveryViewModel.ts b/apps/website/lib/view-models/HomeDiscoveryViewModel.ts
new file mode 100644
index 000000000..8038199c7
--- /dev/null
+++ b/apps/website/lib/view-models/HomeDiscoveryViewModel.ts
@@ -0,0 +1,25 @@
+import { LeagueCardViewModel } from './LeagueCardViewModel';
+import { TeamCardViewModel } from './TeamCardViewModel';
+import { UpcomingRaceCardViewModel } from './UpcomingRaceCardViewModel';
+
+interface HomeDiscoveryDTO {
+  topLeagues: LeagueCardViewModel[];
+  teams: TeamCardViewModel[];
+  upcomingRaces: UpcomingRaceCardViewModel[];
+}
+
+/**
+ * Home discovery view model
+ * Aggregates discovery data for the landing page.
+ */
+export class HomeDiscoveryViewModel {
+  readonly topLeagues: LeagueCardViewModel[];
+  readonly teams: TeamCardViewModel[];
+  readonly upcomingRaces: UpcomingRaceCardViewModel[];
+
+  constructor(dto: HomeDiscoveryDTO) {
+    this.topLeagues = dto.topLeagues;
+    this.teams = dto.teams;
+    this.upcomingRaces = dto.upcomingRaces;
+  }
+}
diff --git a/apps/website/lib/view-models/LeagueCardViewModel.ts b/apps/website/lib/view-models/LeagueCardViewModel.ts
new file mode 100644
index 000000000..62e389cb3
--- /dev/null
+++ b/apps/website/lib/view-models/LeagueCardViewModel.ts
@@ -0,0 +1,23 @@
+import type { LeagueSummaryDTO } from '@/lib/types/generated/LeagueSummaryDTO';
+
+interface LeagueCardDTO {
+  id: string;
+  name: string;
+  description?: string;
+}
+
+/**
+ * League card view model
+ * UI representation of a league on the landing page.
+ */
+export class LeagueCardViewModel {
+  readonly id: string;
+  readonly name: string;
+  readonly description: string;
+
+  constructor(dto: LeagueCardDTO | LeagueSummaryDTO & { description?: string }) {
+    this.id = dto.id;
+    this.name = dto.name;
+    this.description = dto.description ?? 'Competitive iRacing league';
+  }
+}
diff --git a/apps/website/lib/view-models/LeagueDetailViewModel.ts b/apps/website/lib/view-models/LeagueDetailViewModel.ts
index 4c8c235f1..5b9174555 100644
--- a/apps/website/lib/view-models/LeagueDetailViewModel.ts
+++ b/apps/website/lib/view-models/LeagueDetailViewModel.ts
@@ -1,35 +1,144 @@
-export interface MainSponsorInfo {
-  name: string;
-  logoUrl: string;
-  websiteUrl: string;
+/**
+ * League Detail View Model
+ *
+ * View model for detailed league information for sponsors.
+ */
+export class LeagueDetailViewModel {
+  league: LeagueViewModel;
+  drivers: DriverViewModel[];
+  races: RaceViewModel[];
+
+  constructor(data: { league: any; drivers: any[]; races: any[] }) {
+    this.league = new LeagueViewModel(data.league);
+    this.drivers = data.drivers.map(driver => new DriverViewModel(driver));
+    this.races = data.races.map(race => new RaceViewModel(race));
+  }
 }
 
-export class LeagueDetailViewModel {
+export class LeagueViewModel {
   id: string;
   name: string;
+  game: string;
+  tier: 'premium' | 'standard' | 'starter';
+  season: string;
   description: string;
-  ownerId: string;
-  ownerName: string;
-  mainSponsor: MainSponsorInfo | null;
-  isAdmin: boolean;
+  drivers: number;
+  races: number;
+  completedRaces: number;
+  totalImpressions: number;
+  avgViewsPerRace: number;
+  engagement: number;
+  rating: number;
+  seasonStatus: 'active' | 'upcoming' | 'completed';
+  seasonDates: { start: string; end: string };
+  nextRace?: { name: string; date: string };
+  sponsorSlots: {
+    main: { available: boolean; price: number; benefits: string[] };
+    secondary: { available: number; total: number; price: number; benefits: string[] };
+  };
 
-  constructor(
-    id: string,
-    name: string,
-    description: string,
-    ownerId: string,
-    ownerName: string,
-    mainSponsor: MainSponsorInfo | null,
-    isAdmin: boolean
-  ) {
-    this.id = id;
-    this.name = name;
-    this.description = description;
-    this.ownerId = ownerId;
-    this.ownerName = ownerName;
-    this.mainSponsor = mainSponsor;
-    this.isAdmin = isAdmin;
+  constructor(data: any) {
+    this.id = data.id;
+    this.name = data.name;
+    this.game = data.game;
+    this.tier = data.tier;
+    this.season = data.season;
+    this.description = data.description;
+    this.drivers = data.drivers;
+    this.races = data.races;
+    this.completedRaces = data.completedRaces;
+    this.totalImpressions = data.totalImpressions;
+    this.avgViewsPerRace = data.avgViewsPerRace;
+    this.engagement = data.engagement;
+    this.rating = data.rating;
+    this.seasonStatus = data.seasonStatus;
+    this.seasonDates = data.seasonDates;
+    this.nextRace = data.nextRace;
+    this.sponsorSlots = data.sponsorSlots;
   }
 
-  // UI-specific getters can be added here if needed
+  get formattedTotalImpressions(): string {
+    return this.totalImpressions.toLocaleString();
+  }
+
+  get formattedAvgViewsPerRace(): string {
+    return this.avgViewsPerRace.toLocaleString();
+  }
+
+  get projectedTotalViews(): number {
+    return Math.round(this.avgViewsPerRace * this.races);
+  }
+
+  get formattedProjectedTotal(): string {
+    return this.projectedTotalViews.toLocaleString();
+  }
+
+  get mainSponsorCpm(): number {
+    return Math.round((this.sponsorSlots.main.price / this.projectedTotalViews) * 1000);
+  }
+
+  get formattedMainSponsorCpm(): string {
+    return `$${this.mainSponsorCpm.toFixed(2)}`;
+  }
+
+  get racesLeft(): number {
+    return this.races - this.completedRaces;
+  }
+
+  get tierConfig() {
+    const configs = {
+      premium: { color: 'text-yellow-400', bgColor: 'bg-yellow-500/10', border: 'border-yellow-500/30' },
+      standard: { color: 'text-primary-blue', bgColor: 'bg-primary-blue/10', border: 'border-primary-blue/30' },
+      starter: { color: 'text-gray-400', bgColor: 'bg-gray-500/10', border: 'border-gray-500/30' },
+    };
+    return configs[this.tier];
+  }
+}
+
+export class DriverViewModel {
+  id: string;
+  name: string;
+  country: string;
+  position: number;
+  races: number;
+  impressions: number;
+  team: string;
+
+  constructor(data: any) {
+    this.id = data.id;
+    this.name = data.name;
+    this.country = data.country;
+    this.position = data.position;
+    this.races = data.races;
+    this.impressions = data.impressions;
+    this.team = data.team;
+  }
+
+  get formattedImpressions(): string {
+    return this.impressions.toLocaleString();
+  }
+}
+
+export class RaceViewModel {
+  id: string;
+  name: string;
+  date: Date;
+  views: number;
+  status: 'upcoming' | 'completed';
+
+  constructor(data: any) {
+    this.id = data.id;
+    this.name = data.name;
+    this.date = new Date(data.date);
+    this.views = data.views;
+    this.status = data.status;
+  }
+
+  get formattedDate(): string {
+    return this.date.toLocaleDateString('en-US', { month: 'short', day: 'numeric' });
+  }
+
+  get formattedViews(): string {
+    return this.views.toLocaleString();
+  }
 }
\ No newline at end of file
diff --git a/apps/website/lib/view-models/RenewalAlertViewModel.ts b/apps/website/lib/view-models/RenewalAlertViewModel.ts
new file mode 100644
index 000000000..f066afb61
--- /dev/null
+++ b/apps/website/lib/view-models/RenewalAlertViewModel.ts
@@ -0,0 +1,49 @@
+/**
+ * Renewal Alert View Model
+ *
+ * View model for upcoming renewal alerts.
+ */
+export class RenewalAlertViewModel {
+  id: string;
+  name: string;
+  type: 'league' | 'team' | 'driver' | 'race' | 'platform';
+  renewDate: Date;
+  price: number;
+
+  constructor(data: any) {
+    this.id = data.id;
+    this.name = data.name;
+    this.type = data.type;
+    this.renewDate = new Date(data.renewDate);
+    this.price = data.price;
+  }
+
+  get formattedPrice(): string {
+    return `$${this.price}`;
+  }
+
+  get formattedRenewDate(): string {
+    return this.renewDate.toLocaleDateString('en-US', { month: 'short', day: 'numeric', year: 'numeric' });
+  }
+
+  get typeIcon() {
+    const icons = {
+      league: 'Trophy',
+      team: 'Users',
+      driver: 'Car',
+      race: 'Flag',
+      platform: 'Megaphone',
+    };
+    return icons[this.type] || 'Trophy';
+  }
+
+  get daysUntilRenewal(): number {
+    const now = new Date();
+    const diffTime = this.renewDate.getTime() - now.getTime();
+    return Math.ceil(diffTime / (1000 * 60 * 60 * 24));
+  }
+
+  get isUrgent(): boolean {
+    return this.daysUntilRenewal <= 30;
+  }
+}
\ No newline at end of file
diff --git a/apps/website/lib/view-models/SponsorDashboardViewModel.ts b/apps/website/lib/view-models/SponsorDashboardViewModel.ts
index 798a51130..28bb70e92 100644
--- a/apps/website/lib/view-models/SponsorDashboardViewModel.ts
+++ b/apps/website/lib/view-models/SponsorDashboardViewModel.ts
@@ -1,4 +1,7 @@
 import type { SponsorDashboardDTO } from '../types/generated/SponsorDashboardDTO';
+import { SponsorshipViewModel } from './SponsorshipViewModel';
+import { ActivityItemViewModel } from './ActivityItemViewModel';
+import { RenewalAlertViewModel } from './RenewalAlertViewModel';
 
 /**
  * Sponsor Dashboard View Model
@@ -8,17 +11,72 @@ import type { SponsorDashboardDTO } from '../types/generated/SponsorDashboardDTO
 export class SponsorDashboardViewModel {
   sponsorId: string;
   sponsorName: string;
+  metrics: any;
+  sponsorships: {
+    leagues: SponsorshipViewModel[];
+    teams: SponsorshipViewModel[];
+    drivers: SponsorshipViewModel[];
+    races: SponsorshipViewModel[];
+    platform: SponsorshipViewModel[];
+  };
+  recentActivity: ActivityItemViewModel[];
+  upcomingRenewals: RenewalAlertViewModel[];
 
   constructor(dto: SponsorDashboardDTO) {
     this.sponsorId = dto.sponsorId;
     this.sponsorName = dto.sponsorName;
+    this.metrics = dto.metrics;
+    this.sponsorships = {
+      leagues: (dto.sponsorships?.leagues || []).map(s => new SponsorshipViewModel(s)),
+      teams: (dto.sponsorships?.teams || []).map(s => new SponsorshipViewModel(s)),
+      drivers: (dto.sponsorships?.drivers || []).map(s => new SponsorshipViewModel(s)),
+      races: (dto.sponsorships?.races || []).map(s => new SponsorshipViewModel(s)),
+      platform: (dto.sponsorships?.platform || []).map(s => new SponsorshipViewModel(s)),
+    };
+    this.recentActivity = (dto.recentActivity || []).map(a => new ActivityItemViewModel(a));
+    this.upcomingRenewals = (dto.upcomingRenewals || []).map(r => new RenewalAlertViewModel(r));
   }
 
-  // Note: The generated DTO doesn't include these fields yet
-  // These will need to be added when the OpenAPI spec is updated
-  totalSponsorships: number = 0;
-  activeSponsorships: number = 0;
-  totalInvestment: number = 0;
+  get totalSponsorships(): number {
+    return this.sponsorships.leagues.length +
+           this.sponsorships.teams.length +
+           this.sponsorships.drivers.length +
+           this.sponsorships.races.length +
+           this.sponsorships.platform.length;
+  }
+
+  get activeSponsorships(): number {
+    const all = [
+      ...this.sponsorships.leagues,
+      ...this.sponsorships.teams,
+      ...this.sponsorships.drivers,
+      ...this.sponsorships.races,
+      ...this.sponsorships.platform,
+    ];
+    return all.filter(s => s.status === 'active').length;
+  }
+
+  get totalInvestment(): number {
+    const all = [
+      ...this.sponsorships.leagues,
+      ...this.sponsorships.teams,
+      ...this.sponsorships.drivers,
+      ...this.sponsorships.races,
+      ...this.sponsorships.platform,
+    ];
+    return all.filter(s => s.status === 'active').reduce((sum, s) => sum + s.price, 0);
+  }
+
+  get totalImpressions(): number {
+    const all = [
+      ...this.sponsorships.leagues,
+      ...this.sponsorships.teams,
+      ...this.sponsorships.drivers,
+      ...this.sponsorships.races,
+      ...this.sponsorships.platform,
+    ];
+    return all.reduce((sum, s) => sum + s.impressions, 0);
+  }
 
   /** UI-specific: Formatted total investment */
   get formattedTotalInvestment(): string {
@@ -42,4 +100,36 @@ export class SponsorDashboardViewModel {
     if (this.activeSponsorships === this.totalSponsorships) return 'All sponsorships active';
     return `${this.activeSponsorships} of ${this.totalSponsorships} active`;
   }
+
+  /** UI-specific: Cost per 1K views */
+  get costPerThousandViews(): string {
+    if (this.totalImpressions === 0) return '$0.00';
+    return `$${(this.totalInvestment / this.totalImpressions * 1000).toFixed(2)}`;
+  }
+
+  /** UI-specific: Category data for charts */
+  get categoryData() {
+    return {
+      leagues: {
+        count: this.sponsorships.leagues.length,
+        impressions: this.sponsorships.leagues.reduce((sum, l) => sum + l.impressions, 0),
+      },
+      teams: {
+        count: this.sponsorships.teams.length,
+        impressions: this.sponsorships.teams.reduce((sum, t) => sum + t.impressions, 0),
+      },
+      drivers: {
+        count: this.sponsorships.drivers.length,
+        impressions: this.sponsorships.drivers.reduce((sum, d) => sum + d.impressions, 0),
+      },
+      races: {
+        count: this.sponsorships.races.length,
+        impressions: this.sponsorships.races.reduce((sum, r) => sum + r.impressions, 0),
+      },
+      platform: {
+        count: this.sponsorships.platform.length,
+        impressions: this.sponsorships.platform.reduce((sum, p) => sum + p.impressions, 0),
+      },
+    };
+  }
 }
\ No newline at end of file
diff --git a/apps/website/lib/view-models/SponsorSettingsViewModel.ts b/apps/website/lib/view-models/SponsorSettingsViewModel.ts
new file mode 100644
index 000000000..c47b205f3
--- /dev/null
+++ b/apps/website/lib/view-models/SponsorSettingsViewModel.ts
@@ -0,0 +1,89 @@
+/**
+ * Sponsor Settings View Model
+ *
+ * View model for sponsor settings data.
+ */
+export class SponsorSettingsViewModel {
+  profile: SponsorProfileViewModel;
+  notifications: NotificationSettingsViewModel;
+  privacy: PrivacySettingsViewModel;
+
+  constructor(data: { profile: any; notifications: any; privacy: any }) {
+    this.profile = new SponsorProfileViewModel(data.profile);
+    this.notifications = new NotificationSettingsViewModel(data.notifications);
+    this.privacy = new PrivacySettingsViewModel(data.privacy);
+  }
+}
+
+export class SponsorProfileViewModel {
+  companyName: string;
+  contactName: string;
+  contactEmail: string;
+  contactPhone: string;
+  website: string;
+  description: string;
+  logoUrl: string | null;
+  industry: string;
+  address: {
+    street: string;
+    city: string;
+    country: string;
+    postalCode: string;
+  };
+  taxId: string;
+  socialLinks: {
+    twitter: string;
+    linkedin: string;
+    instagram: string;
+  };
+
+  constructor(data: any) {
+    this.companyName = data.companyName;
+    this.contactName = data.contactName;
+    this.contactEmail = data.contactEmail;
+    this.contactPhone = data.contactPhone;
+    this.website = data.website;
+    this.description = data.description;
+    this.logoUrl = data.logoUrl;
+    this.industry = data.industry;
+    this.address = data.address;
+    this.taxId = data.taxId;
+    this.socialLinks = data.socialLinks;
+  }
+
+  get fullAddress(): string {
+    return `${this.address.street}, ${this.address.city}, ${this.address.postalCode}, ${this.address.country}`;
+  }
+}
+
+export class NotificationSettingsViewModel {
+  emailNewSponsorships: boolean;
+  emailWeeklyReport: boolean;
+  emailRaceAlerts: boolean;
+  emailPaymentAlerts: boolean;
+  emailNewOpportunities: boolean;
+  emailContractExpiry: boolean;
+
+  constructor(data: any) {
+    this.emailNewSponsorships = data.emailNewSponsorships;
+    this.emailWeeklyReport = data.emailWeeklyReport;
+    this.emailRaceAlerts = data.emailRaceAlerts;
+    this.emailPaymentAlerts = data.emailPaymentAlerts;
+    this.emailNewOpportunities = data.emailNewOpportunities;
+    this.emailContractExpiry = data.emailContractExpiry;
+  }
+}
+
+export class PrivacySettingsViewModel {
+  publicProfile: boolean;
+  showStats: boolean;
+  showActiveSponsorships: boolean;
+  allowDirectContact: boolean;
+
+  constructor(data: any) {
+    this.publicProfile = data.publicProfile;
+    this.showStats = data.showStats;
+    this.showActiveSponsorships = data.showActiveSponsorships;
+    this.allowDirectContact = data.allowDirectContact;
+  }
+}
\ No newline at end of file
diff --git a/apps/website/lib/view-models/SponsorshipViewModel.ts b/apps/website/lib/view-models/SponsorshipViewModel.ts
new file mode 100644
index 000000000..d4402b1ea
--- /dev/null
+++ b/apps/website/lib/view-models/SponsorshipViewModel.ts
@@ -0,0 +1,92 @@
+/**
+ * Sponsorship View Model
+ *
+ * View model for individual sponsorship data.
+ */
+export class SponsorshipViewModel {
+  id: string;
+  type: 'leagues' | 'teams' | 'drivers' | 'races' | 'platform';
+  entityId: string;
+  entityName: string;
+  tier?: 'main' | 'secondary';
+  status: 'active' | 'pending_approval' | 'approved' | 'rejected' | 'expired';
+  applicationDate?: Date;
+  approvalDate?: Date;
+  rejectionReason?: string;
+  startDate: Date;
+  endDate: Date;
+  price: number;
+  impressions: number;
+  impressionsChange?: number;
+  engagement?: number;
+  details?: string;
+  entityOwner?: string;
+  applicationMessage?: string;
+
+  constructor(data: any) {
+    this.id = data.id;
+    this.type = data.type;
+    this.entityId = data.entityId;
+    this.entityName = data.entityName;
+    this.tier = data.tier;
+    this.status = data.status;
+    this.applicationDate = data.applicationDate ? new Date(data.applicationDate) : undefined;
+    this.approvalDate = data.approvalDate ? new Date(data.approvalDate) : undefined;
+    this.rejectionReason = data.rejectionReason;
+    this.startDate = new Date(data.startDate);
+    this.endDate = new Date(data.endDate);
+    this.price = data.price;
+    this.impressions = data.impressions;
+    this.impressionsChange = data.impressionsChange;
+    this.engagement = data.engagement;
+    this.details = data.details;
+    this.entityOwner = data.entityOwner;
+    this.applicationMessage = data.applicationMessage;
+  }
+
+  get formattedImpressions(): string {
+    return this.impressions.toLocaleString();
+  }
+
+  get formattedPrice(): string {
+    return `$${this.price}`;
+  }
+
+  get daysRemaining(): number {
+    const now = new Date();
+    const diffTime = this.endDate.getTime() - now.getTime();
+    return Math.ceil(diffTime / (1000 * 60 * 60 * 24));
+  }
+
+  get isExpiringSoon(): boolean {
+    return this.daysRemaining > 0 && this.daysRemaining <= 30;
+  }
+
+  get statusLabel(): string {
+    const labels = {
+      active: 'Active',
+      pending_approval: 'Awaiting Approval',
+      approved: 'Approved',
+      rejected: 'Declined',
+      expired: 'Expired',
+    };
+    return labels[this.status] || this.status;
+  }
+
+  get typeLabel(): string {
+    const labels = {
+      leagues: 'League',
+      teams: 'Team',
+      drivers: 'Driver',
+      races: 'Race',
+      platform: 'Platform',
+    };
+    return labels[this.type] || this.type;
+  }
+
+  get periodDisplay(): string {
+    const start = this.startDate.toLocaleDateString('en-US', { month: 'short', year: 'numeric' });
+    const end = this.endDate.toLocaleDateString('en-US', { month: 'short', year: 'numeric' });
+    return `${start} - ${end}`;
+  }
+}
\ No newline at end of file
diff --git a/apps/website/lib/view-models/TeamCardViewModel.ts b/apps/website/lib/view-models/TeamCardViewModel.ts
new file mode 100644
index 000000000..fdccbc39d
--- /dev/null
+++ b/apps/website/lib/view-models/TeamCardViewModel.ts
@@ -0,0 +1,26 @@
+import type { TeamListItemDTO } from '@/lib/types/generated/GetAllTeamsOutputDTO';
+
+interface TeamCardDTO {
+  id: string;
+  name: string;
+  tag: string;
+  description: string;
+}
+
+/**
+ * Team card view model
+ * UI representation of a team on the landing page.
+ */
+export class TeamCardViewModel {
+  readonly id: string;
+  readonly name: string;
+  readonly tag: string;
+  readonly description: string;
+
+  constructor(dto: TeamCardDTO | TeamListItemDTO) {
+    this.id = dto.id;
+    this.name = dto.name;
+    this.tag = dto.tag;
+    this.description = dto.description;
+  }
+}
diff --git a/apps/website/lib/view-models/UpcomingRaceCardViewModel.ts b/apps/website/lib/view-models/UpcomingRaceCardViewModel.ts
new file mode 100644
index 000000000..477400293
--- /dev/null
+++ b/apps/website/lib/view-models/UpcomingRaceCardViewModel.ts
@@ -0,0 +1,32 @@
+interface UpcomingRaceCardDTO {
+  id: string;
+  track: string;
+  car: string;
+  scheduledAt: string;
+}
+
+/**
+ * Upcoming race card view model
+ * UI representation of an upcoming race on the landing page.
+ */
+export class UpcomingRaceCardViewModel {
+  readonly id: string;
+  readonly track: string;
+  readonly car: string;
+  readonly scheduledAt: string;
+
+  constructor(dto: UpcomingRaceCardDTO) {
+    this.id = dto.id;
+    this.track = dto.track;
+    this.car = dto.car;
+    this.scheduledAt = dto.scheduledAt;
+  }
+
+  /** UI-specific: formatted date label */
+  get formattedDate(): string {
+    return new Date(this.scheduledAt).toLocaleDateString(undefined, {
+      month: 'short',
+      day: 'numeric',
+    });
+  }
+}
diff --git a/core/payments/application/services/SponsorBillingService.ts b/core/payments/application/services/SponsorBillingService.ts
new file mode 100644
index 000000000..601fdbefc
--- /dev/null
+++ b/core/payments/application/services/SponsorBillingService.ts
@@ -0,0 +1,150 @@
+import type { IPaymentRepository } from '@core/payments/domain/repositories/IPaymentRepository';
+import { PaymentStatus, PaymentType, PayerType } from '@core/payments/domain/entities/Payment';
+import type { ISeasonSponsorshipRepository } from '@core/racing/domain/repositories/ISeasonSponsorshipRepository';
+
+export interface SponsorBillingStats {
+  totalSpent: number;
+  pendingAmount: number;
+  nextPaymentDate: string | null;
+  nextPaymentAmount: number | null;
+  activeSponsorships: number;
+  averageMonthlySpend: number;
+}
+
+export interface SponsorInvoiceSummary {
+  id: string;
+  invoiceNumber: string;
+  date: string;
+  dueDate: string;
+  amount: number;
+  vatAmount: number;
+  totalAmount: number;
+  status: 'paid' | 'pending' | 'overdue' | 'failed';
+  description: string;
+  sponsorshipType: 'league' | 'team' | 'driver' | 'race' | 'platform';
+  pdfUrl: string;
+}
+
+export interface SponsorPaymentMethodSummary {
+  id: string;
+  type: 'card' | 'bank' | 'sepa';
+  last4: string;
+  brand?: string;
+  isDefault: boolean;
+  expiryMonth?: number;
+  expiryYear?: number;
+  bankName?: string;
+}
+
+export interface SponsorBillingSummary {
+  paymentMethods: SponsorPaymentMethodSummary[];
+  invoices: SponsorInvoiceSummary[];
+  stats: SponsorBillingStats;
+}
+
+/**
+ * Application Service: SponsorBillingService
+ *
+ * Aggregates sponsor-facing billing information from payments and season sponsorships.
+ */
+export class SponsorBillingService {
+  constructor(
+    private readonly paymentRepository: IPaymentRepository,
+    private readonly seasonSponsorshipRepository: ISeasonSponsorshipRepository,
+  ) {}
+
+  async getSponsorBilling(sponsorId: string): Promise<SponsorBillingSummary> {
+    // In this in-memory implementation we derive billing data from payments
+    // where the sponsor is the payer.
+    const payments = await this.paymentRepository.findByFilters({
+      payerId: sponsorId,
+      type: PaymentType.SPONSORSHIP,
+    });
+
+    const sponsorships = await this.seasonSponsorshipRepository.findBySponsorId(sponsorId);
+
+    const invoices: SponsorInvoiceSummary[] = payments.map((payment, index) => {
+      const createdAt = payment.createdAt ?? new Date();
+      const dueDate = new Date(createdAt.getTime());
+      dueDate.setDate(dueDate.getDate() + 14);
+
+      const vatAmount = +(payment.amount * 0.19).toFixed(2);
+      const totalAmount = +(payment.amount + vatAmount).toFixed(2);
+
+      let status: 'paid' | 'pending' | 'overdue' | 'failed' = 'pending';
+      if (payment.status === PaymentStatus.COMPLETED) status = 'paid';
+      else if (payment.status === PaymentStatus.FAILED || payment.status === PaymentStatus.REFUNDED) status = 'failed';
+
+      const now = new Date();
+      if (status === 'pending' && dueDate < now) {
+        status = 'overdue';
+      }
+
+      return {
+        id: payment.id,
+        invoiceNumber: `GP-${createdAt.getFullYear()}-${String(index + 1).padStart(6, '0')}`,
+        date: createdAt.toISOString(),
+        dueDate: dueDate.toISOString(),
+        amount: payment.amount,
+        vatAmount,
+        totalAmount,
+        status,
+        description: 'Sponsorship payment',
+        sponsorshipType: 'league',
+        pdfUrl: '#',
+      };
+    });
+
+    const totalSpent = invoices
+      .filter(i => i.status === 'paid')
+      .reduce((sum, i) => sum + i.totalAmount, 0);
+
+    const pendingAmount = invoices
+      .filter(i => i.status === 'pending' || i.status === 'overdue')
+      .reduce((sum, i) => sum + i.totalAmount, 0);
+
+    const pendingInvoices = invoices.filter(i => i.status === 'pending' || i.status === 'overdue');
+    const nextPending = pendingInvoices.length > 0
+      ? pendingInvoices.reduce((earliest, current) => (current.dueDate < earliest.dueDate ? current : earliest))
+      : null;
+
+    const stats: SponsorBillingStats = {
+      totalSpent,
+      pendingAmount,
+      nextPaymentDate: nextPending ? nextPending.dueDate : null,
+      nextPaymentAmount: nextPending ? nextPending.totalAmount : null,
+      activeSponsorships: sponsorships.filter(s => s.status === 'active').length,
+      averageMonthlySpend: this.calculateAverageMonthlySpend(invoices),
+    };
+
+    // NOTE: Payment methods are not yet persisted in core. For now, we expose
+    // an empty list so the UI can still render correctly. A dedicated
+    // payment-methods port can be added later when the concept exists in core.
+    const paymentMethods: SponsorPaymentMethodSummary[] = [];
+
+    return {
+      paymentMethods,
+      invoices,
+      stats,
+    };
+  }
+
+  private calculateAverageMonthlySpend(invoices: SponsorInvoiceSummary[]): number {
+    if (invoices.length === 0) return 0;
+
+    const sorted = [...invoices].sort((a, b) => a.date.localeCompare(b.date));
+    const first = new Date(sorted[0].date);
+    const last = new Date(sorted[sorted.length - 1].date);
+
+    const months = this.monthDiff(first, last) || 1;
+    const total = sorted.reduce((sum, inv) => sum + inv.totalAmount, 0);
+
+    return Math.round((total / months) * 100) / 100;
+  }
+
+  private monthDiff(d1: Date, d2: Date): number {
+    const years = d2.getFullYear() - d1.getFullYear();
+    const months = d2.getMonth() - d1.getMonth();
+    return years * 12 + months + 1;
+  }
+}
diff --git a/core/racing/application/dto/ReopenRaceCommandDTO.ts b/core/racing/application/dto/ReopenRaceCommandDTO.ts
new file mode 100644
index 000000000..5fd1b9fb9
--- /dev/null
+++ b/core/racing/application/dto/ReopenRaceCommandDTO.ts
@@ -0,0 +1,3 @@
+export interface ReopenRaceCommandDTO {
+  raceId: string;
+}
diff --git a/core/racing/application/use-cases/ReopenRaceUseCase.ts b/core/racing/application/use-cases/ReopenRaceUseCase.ts
new file mode 100644
index 000000000..a975b3135
--- /dev/null
+++ b/core/racing/application/use-cases/ReopenRaceUseCase.ts
@@ -0,0 +1,55 @@
+import type { IRaceRepository } from '../../domain/repositories/IRaceRepository';
+import type { AsyncUseCase } from '@core/shared/application';
+import type { Logger } from '@core/shared/application';
+import { Result } from '@core/shared/application/Result';
+import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
+import type { ReopenRaceCommandDTO } from '../dto/ReopenRaceCommandDTO';
+
+/**
+ * Use Case: ReopenRaceUseCase
+ *
+ * Encapsulates the workflow for re-opening a race:
+ * - loads the race by id
+ * - returns error if the race does not exist
+ * - delegates transition rules to the Race domain entity via `reopen()`
+ * - persists the updated race via the repository.
+ */
+export class ReopenRaceUseCase
+  implements AsyncUseCase<ReopenRaceCommandDTO, void, string> {
+  constructor(
+    private readonly raceRepository: IRaceRepository,
+    private readonly logger: Logger,
+  ) {}
+
+  async execute(command: ReopenRaceCommandDTO): Promise<Result<void, ApplicationErrorCode<string>>> {
+    const { raceId } = command;
+    this.logger.debug(`[ReopenRaceUseCase] Executing for raceId: ${raceId}`);
+
+    try {
+      const race = await this.raceRepository.findById(raceId);
+      if (!race) {
+        this.logger.warn(`[ReopenRaceUseCase] Race with ID ${raceId} not found.`);
+        return Result.err({ code: 'RACE_NOT_FOUND' });
+      }
+
+      const reopenedRace = race.reopen();
+      await this.raceRepository.update(reopenedRace);
+      this.logger.info(`[ReopenRaceUseCase] Race ${raceId} re-opened successfully.`);
+      return Result.ok(undefined);
+    } catch (error) {
+      if (error instanceof Error && error.message.includes('already scheduled')) {
+        this.logger.warn(`[ReopenRaceUseCase] Domain error re-opening race ${raceId}: ${error.message}`);
+        return Result.err({ code: 'RACE_ALREADY_SCHEDULED' });
+      }
+      if (error instanceof Error && error.message.includes('running race')) {
+        this.logger.warn(`[ReopenRaceUseCase] Domain error re-opening race ${raceId}: ${error.message}`);
+        return Result.err({ code: 'CANNOT_REOPEN_RUNNING_RACE' });
+      }
+      this.logger.error(
+        `[ReopenRaceUseCase] Unexpected error re-opening race ${raceId}`,
+        error instanceof Error ? error : new Error(String(error)),
+      );
+      return Result.err({ code: 'UNEXPECTED_ERROR' });
+    }
+  }
+}
diff --git a/core/racing/domain/entities/Race.ts b/core/racing/domain/entities/Race.ts
index 8d021bd65..ea9cefeb3 100644
--- a/core/racing/domain/entities/Race.ts
+++ b/core/racing/domain/entities/Race.ts
@@ -240,6 +240,48 @@ export class Race implements IEntity<string> {
     return Race.create(props);
   }
 
+  /**
+   * Re-open a previously completed or cancelled race
+   */
+  reopen(): Race {
+    if (this.status === 'scheduled') {
+      throw new RacingDomainInvariantError('Race is already scheduled');
+    }
+
+    if (this.status === 'running') {
+      throw new RacingDomainInvariantError('Cannot re-open a running race');
+    }
+
+    const base = {
+      id: this.id,
+      leagueId: this.leagueId,
+      scheduledAt: this.scheduledAt,
+      track: this.track,
+      car: this.car,
+      sessionType: this.sessionType,
+      status: 'scheduled' as RaceStatus,
+    };
+
+    const withTrackId =
+      this.trackId !== undefined ? { ...base, trackId: this.trackId } : base;
+    const withCarId =
+      this.carId !== undefined ? { ...withTrackId, carId: this.carId } : withTrackId;
+    const withSof =
+      this.strengthOfField !== undefined
+        ? { ...withCarId, strengthOfField: this.strengthOfField }
+        : withCarId;
+    const withRegistered =
+      this.registeredCount !== undefined
+        ? { ...withSof, registeredCount: this.registeredCount }
+        : withSof;
+    const props =
+      this.maxParticipants !== undefined
+        ? { ...withRegistered, maxParticipants: this.maxParticipants }
+        : withRegistered;
+
+    return Race.create(props);
+  }
+
   /**
    * Update SOF and participant count
    */