diff --git a/src/shared/credits/defaultCredits.ts b/src/shared/credits/defaultCredits.ts
index 5daf2d139a7..4642d1cb515 100644
--- a/src/shared/credits/defaultCredits.ts
+++ b/src/shared/credits/defaultCredits.ts
@@ -1,13 +1,22 @@
-export const DEFAULT_FIFTEEN_YEARS_OLD_AMOUNT_V2 = 20_00
-export const DEFAULT_FIFTEEN_YEARS_OLD_AMOUNT_V3 = 0
+import type { ReadonlyDeep } from 'type-fest'
 
-export const DEFAULT_SIXTEEN_YEARS_OLD_AMOUNT_V2 = 30_00
-export const DEFAULT_SIXTEEN_YEARS_OLD_AMOUNT_V3 = 0
+import { DepositAmountsByAge } from 'api/gen'
 
-export const DEFAULT_SEVENTEEN_YEARS_OLD_AMOUNT_V2 = 30_00
-export const DEFAULT_SEVENTEEN_YEARS_OLD_AMOUNT_V3 = 50_00
+export const DEFAULT_EIGHTEEN_YEARS_OLD_DIGITAL_AMOUNT_V2 = 100_00
 
-export const DEFAULT_EIGHTEEN_YEARS_OLD_AMOUNT_V2 = 300_00
-export const DEFAULT_EIGHTEEN_YEARS_OLD_AMOUNT_V3 = 150_00
+type Version = 'v2' | 'v3'
 
-export const DEFAULT_EIGHTEEN_YEARS_OLD_DIGITAL_AMOUNT_V2 = 100_00
+export const defaultCreditByAge = {
+  v2: {
+    age_15: 20_00,
+    age_16: 30_00,
+    age_17: 30_00,
+    age_18: 300_0,
+  },
+  v3: {
+    age_15: 0,
+    age_16: 0,
+    age_17: 50_00,
+    age_18: 150_0,
+  },
+} as const satisfies ReadonlyDeep<Record<Version, DepositAmountsByAge>>
diff --git a/src/shared/user/useDepositAmountsByAge.ts b/src/shared/user/useDepositAmountsByAge.ts
index 9e0157ed2db..15c9c84bf27 100644
--- a/src/shared/user/useDepositAmountsByAge.ts
+++ b/src/shared/user/useDepositAmountsByAge.ts
@@ -1,15 +1,6 @@
 import { DepositAmountsByAge } from 'api/gen'
 import { useSettingsContext } from 'features/auth/context/SettingsContext'
-import {
-  DEFAULT_FIFTEEN_YEARS_OLD_AMOUNT_V2,
-  DEFAULT_SIXTEEN_YEARS_OLD_AMOUNT_V2,
-  DEFAULT_SEVENTEEN_YEARS_OLD_AMOUNT_V2,
-  DEFAULT_EIGHTEEN_YEARS_OLD_AMOUNT_V2,
-  DEFAULT_FIFTEEN_YEARS_OLD_AMOUNT_V3,
-  DEFAULT_SIXTEEN_YEARS_OLD_AMOUNT_V3,
-  DEFAULT_SEVENTEEN_YEARS_OLD_AMOUNT_V3,
-  DEFAULT_EIGHTEEN_YEARS_OLD_AMOUNT_V3,
-} from 'shared/credits/defaultCredits'
+import { defaultCreditByAge } from 'shared/credits/defaultCredits'
 import { formatCurrencyFromCents } from 'shared/currency/formatCurrencyFromCents'
 import { useGetCurrencyToDisplay } from 'shared/currency/useGetCurrencyToDisplay'
 import { useGetPacificFrancToEuroRate } from 'shared/exchangeRates/useGetPacificFrancToEuroRate'
@@ -22,48 +13,29 @@ export function useDepositAmountsByAge() {
   const currency = useGetCurrencyToDisplay()
   const euroToPacificFrancRate = useGetPacificFrancToEuroRate()
 
-  const getDefaultAmountByAge = (
-    ageKey: keyof DepositAmountsByAge,
-    defaultV2: number,
-    defaultV3: number
-  ): number => {
-    return deposit?.[ageKey] ?? (enableCreditV3 ? defaultV3 : defaultV2)
+  const getDefaultAmountByAge = (ageKey: keyof DepositAmountsByAge): number => {
+    const version = enableCreditV3 ? 'v3' : 'v2'
+    return deposit?.[ageKey] ?? defaultCreditByAge[version][ageKey]
   }
 
   const amountsByAge = {
     fifteenYearsOldDeposit: formatCurrencyFromCents(
-      getDefaultAmountByAge(
-        'age_15',
-        DEFAULT_FIFTEEN_YEARS_OLD_AMOUNT_V2,
-        DEFAULT_FIFTEEN_YEARS_OLD_AMOUNT_V3
-      ),
+      getDefaultAmountByAge('age_15'),
       currency,
       euroToPacificFrancRate
     ),
     sixteenYearsOldDeposit: formatCurrencyFromCents(
-      getDefaultAmountByAge(
-        'age_16',
-        DEFAULT_SIXTEEN_YEARS_OLD_AMOUNT_V2,
-        DEFAULT_SIXTEEN_YEARS_OLD_AMOUNT_V3
-      ),
+      getDefaultAmountByAge('age_16'),
       currency,
       euroToPacificFrancRate
     ),
     seventeenYearsOldDeposit: formatCurrencyFromCents(
-      getDefaultAmountByAge(
-        'age_17',
-        DEFAULT_SEVENTEEN_YEARS_OLD_AMOUNT_V2,
-        DEFAULT_SEVENTEEN_YEARS_OLD_AMOUNT_V3
-      ),
+      getDefaultAmountByAge('age_17'),
       currency,
       euroToPacificFrancRate
     ),
     eighteenYearsOldDeposit: formatCurrencyFromCents(
-      getDefaultAmountByAge(
-        'age_18',
-        DEFAULT_EIGHTEEN_YEARS_OLD_AMOUNT_V2,
-        DEFAULT_EIGHTEEN_YEARS_OLD_AMOUNT_V3
-      ),
+      getDefaultAmountByAge('age_18'),
       currency,
       euroToPacificFrancRate
     ),