diff --git a/apps/server/src/deposits/deposits.controller.ts b/apps/server/src/deposits/deposits.controller.ts
index 6e0a588..78657bd 100644
--- a/apps/server/src/deposits/deposits.controller.ts
+++ b/apps/server/src/deposits/deposits.controller.ts
@@ -16,7 +16,7 @@ import { Student } from '../entities/student.entity';
 import { DepositsService } from './deposits.service';
 import { NotificationsService } from '../notifications/notifications.service';
 import { NotificationType } from '../entities/notification.entity';
-import { CreateDepositDto, RefundDepositDto, CreateDepositWithInstallmentsDto } from './dto/deposit.dto';
+import { CreateDepositDto, RefundDepositDto } from './dto/deposit.dto';
 import { JwtAuthGuard } from '../auth/guards/jwt-auth.guard';
 import { OperationLogsService } from '../operation-logs/operation-logs.service';
 import { extractRequestInfo } from '../common/request-utils';
@@ -61,7 +61,7 @@ export class DepositsController {
 
   @Post()
   @RequirePermission('deposit:create')
-  async create(@Body() dto: CreateDepositDto | CreateDepositWithInstallmentsDto, @Request() req: any) {
+  async create(@Body() dto: CreateDepositDto, @Request() req: any) {
     const { ipAddress, userAgent } = extractRequestInfo(req);
     const result = await this.service.create(dto, req.user?.id);
     await this.logService.log({
diff --git a/apps/server/src/deposits/deposits.service.ts b/apps/server/src/deposits/deposits.service.ts
index 0f93d3a..b1a8238 100644
--- a/apps/server/src/deposits/deposits.service.ts
+++ b/apps/server/src/deposits/deposits.service.ts
@@ -5,7 +5,7 @@ import { Deposit } from '../entities/deposit.entity';
 import { Student } from '../entities/student.entity';
 import { DepositInstallment } from '../entities/deposit-installment.entity';
 
-import { CreateDepositDto, RefundDepositDto, CreateDepositWithInstallmentsDto } from './dto/deposit.dto';
+import { CreateDepositDto, RefundDepositDto } from './dto/deposit.dto';
 
 @Injectable()
 export class DepositsService {
@@ -55,17 +55,6 @@ export class DepositsService {
       recordedBy: userId,
     });
 
-    if (dto instanceof CreateDepositWithInstallmentsDto && dto.installments?.length) {
-      deposit.installments = dto.installments.map((i) => {
-        const inst = this.installmentRepo.create({
-          amount: i.amount,
-          dueDate: i.dueDate,
-          status: 'pending',
-        });
-        return inst;
-      });
-    }
-
     return this.repo.save(deposit);
   }
 
diff --git a/apps/server/src/deposits/dto/deposit.dto.spec.ts b/apps/server/src/deposits/dto/deposit.dto.spec.ts
new file mode 100644
index 0000000..6de3925
--- /dev/null
+++ b/apps/server/src/deposits/dto/deposit.dto.spec.ts
@@ -0,0 +1,19 @@
+import 'reflect-metadata';
+import { validate } from 'class-validator';
+import { CreateDepositDto } from './deposit.dto';
+
+describe('CreateDepositDto boundaries', () => {
+  it('removes inline installments because they are managed after deposit creation', async () => {
+    const dto = Object.assign(new CreateDepositDto(), {
+      studentId: 1,
+      amount: 500,
+      paidDate: '2026-07-13',
+      installments: [{ amount: 250, dueDate: '2026-08-01' }],
+    });
+
+    await validate(dto, { whitelist: true });
+
+    expect(dto).toMatchObject({ studentId: 1, amount: 500, paidDate: '2026-07-13' });
+    expect(dto).not.toHaveProperty('installments');
+  });
+});
diff --git a/apps/server/src/deposits/dto/deposit.dto.ts b/apps/server/src/deposits/dto/deposit.dto.ts
index 1b140b6..74ea313 100644
--- a/apps/server/src/deposits/dto/deposit.dto.ts
+++ b/apps/server/src/deposits/dto/deposit.dto.ts
@@ -1,5 +1,4 @@
-import { IsInt, IsNumber, IsString, IsOptional, ValidateNested } from 'class-validator';
-import { Type } from 'class-transformer';
+import { IsInt, IsNumber, IsString, IsOptional } from 'class-validator';
 
 export class CreateDepositDto {
   @IsInt()
@@ -16,16 +15,6 @@ export class CreateDepositDto {
   notes?: string;
 }
 
-export class CreateInstallmentDto {
-  @IsNumber()
-  amount: number;
-
-  @IsString()
-  dueDate: string;
-}
-
-
-
 export class RefundDepositDto {
   @IsString()
   refundDate: string;
@@ -42,9 +31,3 @@ export class RefundDepositDto {
   @IsString()
   notes?: string;
 }
-export class CreateDepositWithInstallmentsDto extends CreateDepositDto {
-  @IsOptional()
-  @ValidateNested({ each: true })
-  @Type(() => CreateInstallmentDto)
-  installments?: CreateInstallmentDto[];
-}