diff --git a/packages/transaction-pay-controller/CHANGELOG.md b/packages/transaction-pay-controller/CHANGELOG.md
index 5b22a8046f..60e27b3602 100644
--- a/packages/transaction-pay-controller/CHANGELOG.md
+++ b/packages/transaction-pay-controller/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Add `paymentOverride` property (type `PaymentOverride`) to `TransactionConfig` and `TransactionData`, settable via `setTransactionConfig` ([#8858](https://github.com/MetaMask/core/pull/8858))
+
 ### Changed
 
 - Bump `@metamask/assets-controller` from `^8.0.0` to `^8.0.1` ([#8874](https://github.com/MetaMask/core/pull/8874))
diff --git a/packages/transaction-pay-controller/src/TransactionPayController.test.ts b/packages/transaction-pay-controller/src/TransactionPayController.test.ts
index 76d3ecd6d6..a8a93c81cc 100644
--- a/packages/transaction-pay-controller/src/TransactionPayController.test.ts
+++ b/packages/transaction-pay-controller/src/TransactionPayController.test.ts
@@ -6,7 +6,7 @@ import type { Hex } from '@metamask/utils';
 import { TransactionPayController } from '.';
 import { updateFiatPayment } from './actions/update-fiat-payment';
 import { updatePaymentToken } from './actions/update-payment-token';
-import { TransactionPayStrategy } from './constants';
+import { PaymentOverride, TransactionPayStrategy } from './constants';
 import { deriveFiatAssetForFiatPayment } from './strategy/fiat/utils';
 import { getMessengerMock } from './tests/messenger-mock';
 import type {
@@ -206,6 +206,18 @@ describe('TransactionPayController', () => {
       ).toBe(true);
     });
 
+    it('updates paymentOverride in state', () => {
+      const controller = createController();
+
+      controller.setTransactionConfig(TRANSACTION_ID_MOCK, (config) => {
+        config.paymentOverride = PaymentOverride.MoneyAccount;
+      });
+
+      expect(
+        controller.state.transactionData[TRANSACTION_ID_MOCK].paymentOverride,
+      ).toBe(PaymentOverride.MoneyAccount);
+    });
+
     it('triggers source amounts and quotes update when only isPostQuote changes', () => {
       const controller = createController();
 
diff --git a/packages/transaction-pay-controller/src/TransactionPayController.ts b/packages/transaction-pay-controller/src/TransactionPayController.ts
index 70b4b3f8d6..567bfedabc 100644
--- a/packages/transaction-pay-controller/src/TransactionPayController.ts
+++ b/packages/transaction-pay-controller/src/TransactionPayController.ts
@@ -140,6 +140,7 @@ export class TransactionPayController extends BaseController<
         isPolymarketDepositWallet: transactionData.isPolymarketDepositWallet,
         refundTo: transactionData.refundTo,
         accountOverride: transactionData.accountOverride,
+        paymentOverride: transactionData.paymentOverride,
       };
 
       const previousAccountOverride = config.accountOverride;
@@ -153,6 +154,7 @@ export class TransactionPayController extends BaseController<
       transactionData.isPolymarketDepositWallet =
         config.isPolymarketDepositWallet;
       transactionData.refundTo = config.refundTo;
+      transactionData.paymentOverride = config.paymentOverride;
 
       if (
         !config.isPostQuote &&
diff --git a/packages/transaction-pay-controller/src/constants.ts b/packages/transaction-pay-controller/src/constants.ts
index 5f05ff249b..a808fe7341 100644
--- a/packages/transaction-pay-controller/src/constants.ts
+++ b/packages/transaction-pay-controller/src/constants.ts
@@ -59,6 +59,12 @@ export const STABLECOINS: Record<Hex, Hex[]> = {
   [CHAIN_ID_HYPERCORE]: [HYPERCORE_USDC_ADDRESS], // USDC
 };
 
+export enum PaymentOverride {
+  MoneyAccount = 'moneyAccount',
+  Perps = 'perps',
+  Predict = 'predict',
+}
+
 export enum TransactionPayStrategy {
   Across = 'across',
   Bridge = 'bridge',
diff --git a/packages/transaction-pay-controller/src/index.ts b/packages/transaction-pay-controller/src/index.ts
index c31382d8ba..44cd88e82a 100644
--- a/packages/transaction-pay-controller/src/index.ts
+++ b/packages/transaction-pay-controller/src/index.ts
@@ -29,7 +29,7 @@ export type {
   TransactionPayControllerUpdatePaymentTokenAction,
   TransactionPayControllerUpdateFiatPaymentAction,
 } from './TransactionPayController-method-action-types';
-export { TransactionPayStrategy } from './constants';
+export { PaymentOverride, TransactionPayStrategy } from './constants';
 export { TransactionPayController } from './TransactionPayController';
 export { TransactionPayPublishHook } from './helpers/TransactionPayPublishHook';
 export type { TransactionPayBridgeQuote } from './strategy/bridge/types';
diff --git a/packages/transaction-pay-controller/src/types.ts b/packages/transaction-pay-controller/src/types.ts
index 8844400512..d6795dccdf 100644
--- a/packages/transaction-pay-controller/src/types.ts
+++ b/packages/transaction-pay-controller/src/types.ts
@@ -58,7 +58,11 @@ import type {
 import type { Hex, Json } from '@metamask/utils';
 import type { Draft } from 'immer';
 
-import type { CONTROLLER_NAME, TransactionPayStrategy } from './constants';
+import type {
+  CONTROLLER_NAME,
+  PaymentOverride,
+  TransactionPayStrategy,
+} from './constants';
 import type { TransactionPayControllerMethodActions } from './TransactionPayController-method-action-types';
 
 export type AllowedActions =
@@ -140,6 +144,9 @@ export type TransactionConfig = {
    * When `isPostQuote` is false, it provides the funds and pays for gas.
    */
   accountOverride?: Hex;
+
+  /** Overrides the payment source for the transaction. */
+  paymentOverride?: PaymentOverride;
 };
 
 /** Callback to update transaction config. */
@@ -246,6 +253,9 @@ export type TransactionData = {
    */
   accountOverride?: Hex;
 
+  /** Overrides the payment source for the transaction. */
+  paymentOverride?: PaymentOverride;
+
   /**
    * Token selected for the transaction.
    * - For standard flows (isPostQuote=false): This is the SOURCE/payment token