diff --git a/apps/api/v1/services/budget.service.ts b/apps/api/v1/services/budget.service.ts
index 01b7fc19..72863b9c 100644
--- a/apps/api/v1/services/budget.service.ts
+++ b/apps/api/v1/services/budget.service.ts
@@ -5,6 +5,7 @@ import {
 import type { CreateBudget, UpdateBudget } from '@6pm/validation'
 import {
   type Budget,
+  type BudgetPeriodConfig,
   BudgetUserPermission,
   type Prisma,
   type User,
@@ -16,6 +17,10 @@ const BUDGET_INCLUDE: Prisma.BudgetInclude = {
   periodConfigs: true,
 }
 
+type BudgetPopulated = Budget & {
+  periodConfigs: BudgetPeriodConfig[]
+}
+
 export async function canUserCreateBudget({
   // biome-ignore lint/correctness/noUnusedVariables: <explanation>
   user,
@@ -277,7 +282,7 @@ async function findBudgetLatestPeriodConfig({
   })
 }
 
-async function verifyBudgetPeriods({ budget }: { budget: Budget }) {
+async function verifyBudgetPeriods({ budget }: { budget: BudgetPopulated }) {
   const latestPeriodConfig = await findBudgetLatestPeriodConfig({
     budgetId: budget.id,
   })