diff --git a/packages/core/src/account/smartContractAccount.ts b/packages/core/src/account/smartContractAccount.ts
index 9729781f6b..e74dbc8f9c 100644
--- a/packages/core/src/account/smartContractAccount.ts
+++ b/packages/core/src/account/smartContractAccount.ts
@@ -78,7 +78,7 @@ export type SmartContractAccount<
     typedDataDefinition: TypedDataDefinition<typedData, primaryType>
   ) => Promise<Hex>;
   encodeUpgradeToAndCall: (params: UpgradeToAndCallParams) => Promise<Hex>;
-  getNonce(): Promise<bigint>;
+  getNonce(nonceKey?: bigint): Promise<bigint>;
   getInitCode: () => Promise<Hex>;
   isAccountDeployed: () => Promise<boolean>;
   getFactoryAddress: () => Address;
@@ -244,12 +244,12 @@ export async function toSmartContractAccount<
     return initCode === "0x";
   };
 
-  const getNonce = async () => {
+  const getNonce = async (nonceKey = 0n) => {
     if (!(await isAccountDeployed())) {
       return 0n;
     }
 
-    return entryPointContract.read.getNonce([accountAddress_, BigInt(0)]);
+    return entryPointContract.read.getNonce([accountAddress_, nonceKey]);
   };
 
   const account = toAccount({
diff --git a/packages/core/src/actions/smartAccount/buildUserOperation.ts b/packages/core/src/actions/smartAccount/buildUserOperation.ts
index 524f752916..07121a1753 100644
--- a/packages/core/src/actions/smartAccount/buildUserOperation.ts
+++ b/packages/core/src/actions/smartAccount/buildUserOperation.ts
@@ -35,7 +35,7 @@ export const buildUserOperation: <
     uo: {
       initCode: account.getInitCode(),
       sender: account.address,
-      nonce: account.getNonce(),
+      nonce: account.getNonce(overrides?.nonceKey),
       callData: Array.isArray(uo)
         ? account.encodeBatchExecute(uo)
         : typeof uo === "string"
diff --git a/packages/core/src/types.ts b/packages/core/src/types.ts
index 7e0f553383..e9007f59cf 100644
--- a/packages/core/src/types.ts
+++ b/packages/core/src/types.ts
@@ -54,6 +54,14 @@ export type UserOperationOverrides = Partial<{
     | UserOperationStruct["verificationGasLimit"]
     | Percentage;
   paymasterAndData: UserOperationStruct["paymasterAndData"];
+  /**
+   * This can be used to override the key used when calling `entryPoint.getNonce`
+   * It is useful when you want to use parallel nonces for user operations
+   *
+   * NOTE: not all bundlers fully support this feature and it could be that your bundler will still only include
+   * one user operation for your account in a bundle
+   */
+  nonceKey: bigint;
 }>;
 
 // represents the request as it needs to be formatted for RPC requests