diff --git a/src/api/transactionSubmission/simulate.ts b/src/api/transactionSubmission/simulate.ts
index 7cf9d4c90..c061585b6 100644
--- a/src/api/transactionSubmission/simulate.ts
+++ b/src/api/transactionSubmission/simulate.ts
@@ -1,7 +1,7 @@
 // Copyright © Aptos Foundation
 // SPDX-License-Identifier: Apache-2.0
 
-import { PublicKey } from "../../core";
+import type { PublicKeyInput } from "../../core";
 import { simulateTransaction } from "../../internal/transactionSubmission";
 import { AnyRawTransaction, InputSimulateTransactionOptions } from "../../transactions";
 import { UserTransactionResponse } from "../../types";
@@ -30,9 +30,9 @@ export class Simulate {
    */
   @ValidateFeePayerDataOnSimulation
   async simple(args: {
-    signerPublicKey: PublicKey;
+    signerPublicKey: PublicKeyInput;
     transaction: AnyRawTransaction;
-    feePayerPublicKey?: PublicKey;
+    feePayerPublicKey?: PublicKeyInput;
     options?: InputSimulateTransactionOptions;
   }): Promise<Array<UserTransactionResponse>> {
     return simulateTransaction({ aptosConfig: this.config, ...args });
@@ -51,10 +51,10 @@ export class Simulate {
    */
   @ValidateFeePayerDataOnSimulation
   async multiAgent(args: {
-    signerPublicKey: PublicKey;
+    signerPublicKey: PublicKeyInput;
     transaction: AnyRawTransaction;
-    secondarySignersPublicKeys: Array<PublicKey>;
-    feePayerPublicKey?: PublicKey;
+    secondarySignersPublicKeys: PublicKeyInput[];
+    feePayerPublicKey?: PublicKeyInput;
     options?: InputSimulateTransactionOptions;
   }): Promise<Array<UserTransactionResponse>> {
     return simulateTransaction({ aptosConfig: this.config, ...args });
diff --git a/src/api/transactionSubmission/submit.ts b/src/api/transactionSubmission/submit.ts
index 5be79f5a5..82b863d93 100644
--- a/src/api/transactionSubmission/submit.ts
+++ b/src/api/transactionSubmission/submit.ts
@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 
 import { submitTransaction } from "../../internal/transactionSubmission";
-import { AccountAuthenticator, AnyRawTransaction } from "../../transactions";
+import { AccountAuthenticator, MultiAgentTransaction, SimpleTransaction } from "../../transactions";
 import { PendingTransactionResponse } from "../../types";
 import { AptosConfig } from "../aptosConfig";
 import { ValidateFeePayerDataOnSubmission } from "./helpers";
@@ -28,7 +28,7 @@ export class Submit {
    */
   @ValidateFeePayerDataOnSubmission
   async simple(args: {
-    transaction: AnyRawTransaction;
+    transaction: SimpleTransaction;
     senderAuthenticator: AccountAuthenticator;
     feePayerAuthenticator?: AccountAuthenticator;
   }): Promise<PendingTransactionResponse> {
@@ -47,7 +47,7 @@ export class Submit {
    */
   @ValidateFeePayerDataOnSubmission
   async multiAgent(args: {
-    transaction: AnyRawTransaction;
+    transaction: MultiAgentTransaction;
     senderAuthenticator: AccountAuthenticator;
     additionalSignersAuthenticators: Array<AccountAuthenticator>;
     feePayerAuthenticator?: AccountAuthenticator;
diff --git a/src/transactions/types.ts b/src/transactions/types.ts
index d2f6ca64c..27a762c57 100644
--- a/src/transactions/types.ts
+++ b/src/transactions/types.ts
@@ -274,12 +274,21 @@ export type InputGenerateTransactionData =
   | InputGenerateSingleSignerRawTransactionData
   | InputGenerateMultiAgentRawTransactionData;
 
-/**
- * Interface that holds the user data input when submitting a transaction
- */
-export interface InputSubmitTransactionData {
-  transaction: AnyRawTransaction;
+export interface SubmitSimpleTransactionArgs {
+  transaction: SimpleTransaction;
+  senderAuthenticator: AccountAuthenticator;
+  additionalSignersAuthenticators?: undefined;
+  feePayerAuthenticator?: AccountAuthenticator;
+}
+
+export interface SubmitMultiSignerTransactionArgs {
+  transaction: MultiAgentTransaction;
   senderAuthenticator: AccountAuthenticator;
+  additionalSignersAuthenticators: AccountAuthenticator[];
   feePayerAuthenticator?: AccountAuthenticator;
-  additionalSignersAuthenticators?: Array<AccountAuthenticator>;
 }
+
+/**
+ * Interface that holds the user data input when submitting a transaction
+ */
+export type InputSubmitTransactionData = SubmitSimpleTransactionArgs | SubmitMultiSignerTransactionArgs;