diff --git a/src/app.module.ts b/src/app.module.ts
index da6668b..716af22 100644
--- a/src/app.module.ts
+++ b/src/app.module.ts
@@ -7,6 +7,7 @@ import { dataSourceOptions } from './config/typeorm.config';
 import { BusinessCategoriesModule } from './modules/business-categories/business-categories.module';
 import { BusinessesModule } from './modules/businesses/businesses.module';
 import { ServiceTemplatesModule } from './modules/service-templates/service-templates.module';
+import { BusinessServicesModule } from './modules/business-services/business-services.module';
 
 @Module({
   imports: [
@@ -15,6 +16,7 @@ import { ServiceTemplatesModule } from './modules/service-templates/service-temp
     BusinessCategoriesModule,
     BusinessesModule,
     ServiceTemplatesModule,
+    BusinessServicesModule,
   ],
   controllers: [AppController],
   providers: [AppService],
diff --git a/src/modules/business-services/business-services.controller.ts b/src/modules/business-services/business-services.controller.ts
new file mode 100644
index 0000000..bd8d518
--- /dev/null
+++ b/src/modules/business-services/business-services.controller.ts
@@ -0,0 +1,61 @@
+import {
+  Body,
+  Controller,
+  Delete,
+  Get,
+  Param,
+  Patch,
+  Post,
+  Query,
+} from '@nestjs/common';
+import { BusinessServiceEntity } from '../../entities/business-service.entity';
+import { BusinessServicesService } from './business-services.service';
+import { CreateBusinessServiceDto } from './dto/create-business-service.dto';
+import { UpdateBusinessServiceDto } from './dto/update-business-service.dto';
+
+@Controller('business-services')
+export class BusinessServicesController {
+  constructor(private readonly service: BusinessServicesService) {}
+
+  @Get()
+  findAll(
+    @Query('businessId') businessId?: string,
+    @Query('serviceTemplateId') serviceTemplateId?: string,
+    @Query('isActive') isActive?: string,
+  ): Promise<BusinessServiceEntity[]> {
+    const parsedIsActive =
+      typeof isActive === 'string' ? isActive === 'true' : undefined;
+
+    return this.service.findAll({
+      businessId,
+      serviceTemplateId,
+      isActive: parsedIsActive,
+    });
+  }
+
+  @Get(':id')
+  findOne(@Param('id') id: string): Promise<BusinessServiceEntity> {
+    return this.service.findOne(id);
+  }
+
+  @Post()
+  create(
+    @Body() payload: CreateBusinessServiceDto,
+  ): Promise<BusinessServiceEntity> {
+    return this.service.create(payload);
+  }
+
+  @Patch(':id')
+  update(
+    @Param('id') id: string,
+    @Body() payload: UpdateBusinessServiceDto,
+  ): Promise<BusinessServiceEntity> {
+    return this.service.update(id, payload);
+  }
+
+  @Delete(':id')
+  async remove(@Param('id') id: string): Promise<{ success: true }> {
+    await this.service.remove(id);
+    return { success: true };
+  }
+}
diff --git a/src/modules/business-services/business-services.module.ts b/src/modules/business-services/business-services.module.ts
new file mode 100644
index 0000000..94183e3
--- /dev/null
+++ b/src/modules/business-services/business-services.module.ts
@@ -0,0 +1,20 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { BusinessEntity } from '../../entities/business.entity';
+import { BusinessServiceEntity } from '../../entities/business-service.entity';
+import { ServiceTemplateEntity } from '../../entities/service-template.entity';
+import { BusinessServicesController } from './business-services.controller';
+import { BusinessServicesService } from './business-services.service';
+
+@Module({
+  imports: [
+    TypeOrmModule.forFeature([
+      BusinessServiceEntity,
+      BusinessEntity,
+      ServiceTemplateEntity,
+    ]),
+  ],
+  controllers: [BusinessServicesController],
+  providers: [BusinessServicesService],
+})
+export class BusinessServicesModule {}
diff --git a/src/modules/business-services/business-services.service.ts b/src/modules/business-services/business-services.service.ts
new file mode 100644
index 0000000..559b13d
--- /dev/null
+++ b/src/modules/business-services/business-services.service.ts
@@ -0,0 +1,193 @@
+import {
+  BadRequestException,
+  ConflictException,
+  Injectable,
+  NotFoundException,
+} from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { BusinessEntity } from '../../entities/business.entity';
+import { BusinessServiceEntity } from '../../entities/business-service.entity';
+import { ServiceTemplateEntity } from '../../entities/service-template.entity';
+import { CreateBusinessServiceDto } from './dto/create-business-service.dto';
+import { UpdateBusinessServiceDto } from './dto/update-business-service.dto';
+
+type FindAllFilters = {
+  businessId?: string;
+  serviceTemplateId?: string;
+  isActive?: boolean;
+};
+
+function normalizePrice(value: number): string {
+  if (!Number.isFinite(value) || value < 0) {
+    throw new BadRequestException('price must be a non-negative finite number');
+  }
+  return value.toFixed(2);
+}
+
+@Injectable()
+export class BusinessServicesService {
+  constructor(
+    @InjectRepository(BusinessServiceEntity)
+    private readonly repo: Repository<BusinessServiceEntity>,
+    @InjectRepository(BusinessEntity)
+    private readonly businessRepo: Repository<BusinessEntity>,
+    @InjectRepository(ServiceTemplateEntity)
+    private readonly templateRepo: Repository<ServiceTemplateEntity>,
+  ) {}
+
+  async findAll(filters: FindAllFilters): Promise<BusinessServiceEntity[]> {
+    const query = this.repo
+      .createQueryBuilder('bs')
+      .leftJoinAndSelect('bs.business', 'business')
+      .leftJoinAndSelect('bs.serviceTemplate', 'template')
+      .orderBy('bs.createdAt', 'DESC');
+
+    if (filters.businessId) {
+      query.andWhere('bs.businessId = :businessId', {
+        businessId: filters.businessId,
+      });
+    }
+    if (filters.serviceTemplateId) {
+      query.andWhere('bs.serviceTemplateId = :serviceTemplateId', {
+        serviceTemplateId: filters.serviceTemplateId,
+      });
+    }
+    if (typeof filters.isActive === 'boolean') {
+      query.andWhere('bs.isActive = :isActive', {
+        isActive: filters.isActive,
+      });
+    }
+
+    return query.getMany();
+  }
+
+  async findOne(id: string): Promise<BusinessServiceEntity> {
+    const row = await this.repo.findOne({
+      where: { id },
+      relations: { business: true, serviceTemplate: true },
+    });
+    if (!row) {
+      throw new NotFoundException('Business service not found');
+    }
+    return row;
+  }
+
+  async create(dto: CreateBusinessServiceDto): Promise<BusinessServiceEntity> {
+    const business = await this.businessRepo.findOne({
+      where: { id: dto.businessId },
+    });
+    if (!business) {
+      throw new NotFoundException('Business not found');
+    }
+
+    const template = await this.templateRepo.findOne({
+      where: { id: dto.serviceTemplateId },
+    });
+    if (!template) {
+      throw new NotFoundException('Service template not found');
+    }
+
+    if (template.categoryId !== business.categoryId) {
+      throw new BadRequestException(
+        'Service template category must match business category',
+      );
+    }
+
+    const dup = await this.repo.findOne({
+      where: {
+        businessId: dto.businessId,
+        serviceTemplateId: dto.serviceTemplateId,
+      },
+    });
+    if (dup) {
+      throw new ConflictException(
+        'This service template is already enabled for this business',
+      );
+    }
+
+    const duration =
+      dto.durationMinutes ?? template.defaultDurationMinutes ?? null;
+
+    const entity = this.repo.create({
+      businessId: dto.businessId,
+      serviceTemplateId: dto.serviceTemplateId,
+      price: normalizePrice(dto.price),
+      durationMinutes: duration,
+      isActive: dto.isActive ?? true,
+    });
+
+    return this.repo.save(entity);
+  }
+
+  async update(
+    id: string,
+    dto: UpdateBusinessServiceDto,
+  ): Promise<BusinessServiceEntity> {
+    const row = await this.findOne(id);
+
+    let nextTemplateId = row.serviceTemplateId;
+    if (dto.serviceTemplateId !== undefined) {
+      nextTemplateId = dto.serviceTemplateId;
+    }
+
+    const business = await this.businessRepo.findOne({
+      where: { id: row.businessId },
+    });
+    if (!business) {
+      throw new NotFoundException('Business not found');
+    }
+
+    const template = await this.templateRepo.findOne({
+      where: { id: nextTemplateId },
+    });
+    if (!template) {
+      throw new NotFoundException('Service template not found');
+    }
+
+    if (template.categoryId !== business.categoryId) {
+      throw new BadRequestException(
+        'Service template category must match business category',
+      );
+    }
+
+    if (
+      dto.serviceTemplateId !== undefined &&
+      dto.serviceTemplateId !== row.serviceTemplateId
+    ) {
+      const dup = await this.repo.findOne({
+        where: {
+          businessId: row.businessId,
+          serviceTemplateId: dto.serviceTemplateId,
+        },
+      });
+      if (dup && dup.id !== row.id) {
+        throw new ConflictException(
+          'This service template is already enabled for this business',
+        );
+      }
+    }
+
+    if (dto.price !== undefined) {
+      row.price = normalizePrice(dto.price);
+    }
+    if (dto.durationMinutes !== undefined) {
+      row.durationMinutes = dto.durationMinutes;
+    }
+    if (dto.isActive !== undefined) {
+      row.isActive = dto.isActive;
+    }
+    if (dto.serviceTemplateId !== undefined) {
+      row.serviceTemplateId = dto.serviceTemplateId;
+    }
+
+    return this.repo.save(row);
+  }
+
+  async remove(id: string): Promise<void> {
+    const result = await this.repo.delete(id);
+    if (!result.affected) {
+      throw new NotFoundException('Business service not found');
+    }
+  }
+}
diff --git a/src/modules/business-services/dto/create-business-service.dto.ts b/src/modules/business-services/dto/create-business-service.dto.ts
new file mode 100644
index 0000000..95c78e0
--- /dev/null
+++ b/src/modules/business-services/dto/create-business-service.dto.ts
@@ -0,0 +1,9 @@
+export class CreateBusinessServiceDto {
+  businessId!: string;
+  serviceTemplateId!: string;
+  /** قیمت به واحد پول (عدد اعشاری مجاز است) */
+  price!: number;
+  /** اگر خالی باشد از template.defaultDurationMinutes استفاده می‌شود */
+  durationMinutes?: number | null;
+  isActive?: boolean;
+}
diff --git a/src/modules/business-services/dto/update-business-service.dto.ts b/src/modules/business-services/dto/update-business-service.dto.ts
new file mode 100644
index 0000000..d9755a3
--- /dev/null
+++ b/src/modules/business-services/dto/update-business-service.dto.ts
@@ -0,0 +1,6 @@
+export class UpdateBusinessServiceDto {
+  serviceTemplateId?: string;
+  price?: number;
+  durationMinutes?: number | null;
+  isActive?: boolean;
+}