diff --git a/src/accounts/accounts.controller.ts b/src/accounts/accounts.controller.ts
index 2601800..e176143 100644
--- a/src/accounts/accounts.controller.ts
+++ b/src/accounts/accounts.controller.ts
@@ -2,6 +2,7 @@ import { Body, Controller, Get, Param, Patch, Post, Query } from "@nestjs/common
 import { ok } from "../common/response";
 import { AccountsService } from "./accounts.service";
 import { CurrentUser } from "../common/decorators/current-user.decorator";
+import { CreateManualAccountDto } from "./dto/create-manual-account.dto";
 import { UpdateAccountOwnershipDto } from "./dto/update-account-ownership.dto";
 
 @Controller("accounts")
@@ -27,7 +28,7 @@ export class AccountsController {
   @Post("manual")
   async manual(
     @CurrentUser() userId: string,
-    @Body() payload: { institutionName: string; accountType: string; mask?: string },
+    @Body() payload: CreateManualAccountDto,
   ) {
     const data = await this.accountsService.createManualAccount(userId, payload);
     return ok(data);
diff --git a/src/accounts/dto/create-manual-account.dto.ts b/src/accounts/dto/create-manual-account.dto.ts
new file mode 100644
index 0000000..0e6646f
--- /dev/null
+++ b/src/accounts/dto/create-manual-account.dto.ts
@@ -0,0 +1,16 @@
+import { IsIn, IsOptional, IsString, MaxLength } from "class-validator";
+
+export class CreateManualAccountDto {
+  @IsString()
+  @MaxLength(120)
+  institutionName!: string;
+
+  @IsString()
+  @IsIn(["checking", "savings", "credit", "investment", "loan", "cash", "other"])
+  accountType!: string;
+
+  @IsOptional()
+  @IsString()
+  @MaxLength(12)
+  mask?: string;
+}