diff --git a/Amplify/Categories/Auth/Result/AuthSignUpResult.swift b/Amplify/Categories/Auth/Result/AuthSignUpResult.swift
index 88853771b6..012856908a 100644
--- a/Amplify/Categories/Auth/Result/AuthSignUpResult.swift
+++ b/Amplify/Categories/Auth/Result/AuthSignUpResult.swift
@@ -23,7 +23,13 @@ public struct AuthSignUpResult {
     ///
     public let nextStep: AuthSignUpStep
 
-    public init(_ nextStep: AuthSignUpStep) {
+    public let userID: String?
+
+    public init(
+        _ nextStep: AuthSignUpStep,
+        userID: String? = nil
+    ) {
         self.nextStep = nextStep
+        self.userID = userID
     }
 }
diff --git a/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Service/Helpers/SignUpOutputResponse+Helper.swift b/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Service/Helpers/SignUpOutputResponse+Helper.swift
index c9706e53a0..c6c4742008 100644
--- a/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Service/Helpers/SignUpOutputResponse+Helper.swift
+++ b/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Service/Helpers/SignUpOutputResponse+Helper.swift
@@ -13,14 +13,15 @@ extension SignUpOutputResponse {
 
     var authResponse: AuthSignUpResult {
         if self.userConfirmed {
-            return .init(.done)
+            return .init(.done, userID: userSub)
         }
         return AuthSignUpResult(
             .confirmUser(
                 codeDeliveryDetails?.toAuthCodeDeliveryDetails(),
                 nil,
                 userSub
-            )
+            ),
+            userID: userSub
         )
     }
 }
diff --git a/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Task/AWSAuthConfirmSignUpTask.swift b/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Task/AWSAuthConfirmSignUpTask.swift
index f33017336c..db0148eea5 100644
--- a/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Task/AWSAuthConfirmSignUpTask.swift
+++ b/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Task/AWSAuthConfirmSignUpTask.swift
@@ -41,7 +41,7 @@ class AWSAuthConfirmSignUpTask: AuthConfirmSignUpTask, DefaultLogger {
                                            environment: userPoolEnvironment)
             _ = try await client.confirmSignUp(input: input)
             log.verbose("Received success")
-            return AuthSignUpResult(.done)
+            return AuthSignUpResult(.done, userID: nil)
         } catch let error as AuthError {
             throw error
         } catch let error as AuthErrorConvertible {
diff --git a/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/TaskTests/ClientBehaviorTests/SignUp/AWSAuthConfirmSignUpTaskTests.swift b/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/TaskTests/ClientBehaviorTests/SignUp/AWSAuthConfirmSignUpTaskTests.swift
index f4a91a521d..9236e24c98 100644
--- a/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/TaskTests/ClientBehaviorTests/SignUp/AWSAuthConfirmSignUpTaskTests.swift
+++ b/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/TaskTests/ClientBehaviorTests/SignUp/AWSAuthConfirmSignUpTaskTests.swift
@@ -45,7 +45,7 @@ class AWSAuthConfirmSignUpTaskTests: XCTestCase {
         let task = AWSAuthConfirmSignUpTask(request, authEnvironment: authEnvironment)
         let confirmSignUpResult = try await task.value
         print("Confirm Sign Up Result: \(confirmSignUpResult)")
-        wait(for: [functionExpectation], timeout: 1)
+        await fulfillment(of: [functionExpectation], timeout: 1)
     }
 
     func testConfirmSignUpOperationFailure() async throws {
diff --git a/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/TaskTests/ClientBehaviorTests/SignUp/AWSAuthSignUpAPITests.swift b/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/TaskTests/ClientBehaviorTests/SignUp/AWSAuthSignUpAPITests.swift
index c43745984b..b0f514aae8 100644
--- a/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/TaskTests/ClientBehaviorTests/SignUp/AWSAuthSignUpAPITests.swift
+++ b/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/TaskTests/ClientBehaviorTests/SignUp/AWSAuthSignUpAPITests.swift
@@ -126,6 +126,65 @@ class AWSAuthSignUpAPITests: BasePluginTest {
         XCTAssertFalse(result.isSignUpComplete, "Signin result should be complete")
     }
 
+    /// Given: A response from Cognito SignUp when `userConfirmed == true` and a present `userSub`
+    /// When: Invoking `signUp(username:password:options:)`
+    /// Then: The caller should receive an `AuthSignUpResult` where `nextStep == .done` and
+    /// `userID` is the `userSub` returned by the service.
+    func test_signUp_done_withUserSub() async throws {
+        let sub = UUID().uuidString
+        mockIdentityProvider = MockIdentityProvider(
+            mockSignUpResponse: { _ in
+                return .init(
+                    codeDeliveryDetails: nil,
+                    userConfirmed: true,
+                    userSub: sub
+                )
+            }
+        )
+
+        let result = try await plugin.signUp(
+            username: "foo",
+            password: "bar",
+            options: nil
+        )
+
+        XCTAssertEqual(result.nextStep, .done)
+        XCTAssertEqual(result.userID, sub)
+        XCTAssertTrue(result.isSignUpComplete)
+    }
+
+    /// Given: A response from Cognito SignUp that includes `codeDeliveryDetails` where `userConfirmed == false`
+    /// When: Invoking `signUp(username:password:options:)`
+    /// Then: The caller should receive an `AuthSignUpResult` where `nextStep == .confirmUser` and
+    /// the applicable associated value of that case and the `userID` both equal the `userSub` returned by the service.
+    func test_signUp_confirmUser_userIDsMatch() async throws {
+        let sub = UUID().uuidString
+        mockIdentityProvider = MockIdentityProvider(
+            mockSignUpResponse: { _ in
+                return .init(
+                    codeDeliveryDetails: .init(
+                        attributeName: "some attribute",
+                        deliveryMedium: .email,
+                        destination: ""
+                    ),
+                    userConfirmed: false,
+                    userSub: sub
+                )
+            }
+        )
+
+        let result = try await plugin.signUp(
+            username: "foo",
+            password: "bar",
+            options: nil
+        )
+
+        guard case .confirmUser(_, _, let userID) = result.nextStep else {
+            return XCTFail("expected .confirmUser nextStep")
+        }
+        XCTAssertEqual(result.userID, userID)
+    }
+
     func testSignUpServiceError() async {
 
         let errorsToTest: [(signUpOutputError: SignUpOutputError, cognitoError: AWSCognitoAuthError)] = [
diff --git a/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/TaskTests/ClientBehaviorTests/SignUp/AWSAuthSignUpTaskTests.swift b/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/TaskTests/ClientBehaviorTests/SignUp/AWSAuthSignUpTaskTests.swift
index b739ca8ef6..4368f834f5 100644
--- a/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/TaskTests/ClientBehaviorTests/SignUp/AWSAuthSignUpTaskTests.swift
+++ b/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/TaskTests/ClientBehaviorTests/SignUp/AWSAuthSignUpTaskTests.swift
@@ -41,7 +41,7 @@ class AWSAuthSignUpTaskTests: XCTestCase {
         let task = AWSAuthSignUpTask(request, authEnvironment: authEnvironment)
         let signUpResult = try await task.value
         print("Sign Up Result: \(signUpResult)")
-        wait(for: [functionExpectation], timeout: 1)
+        await fulfillment(of: [functionExpectation], timeout: 1)
     }
 
     /// Given: Configured AuthState machine