diff --git a/src/strands/multiagent/swarm.py b/src/strands/multiagent/swarm.py
index 6c1149624..8368f5936 100644
--- a/src/strands/multiagent/swarm.py
+++ b/src/strands/multiagent/swarm.py
@@ -199,7 +199,7 @@ def should_continue(
             return False, f"Max iterations reached: {max_iterations}"
 
         # Check timeout
-        elapsed = time.time() - self.start_time
+        elapsed = self.execution_time / 1000 + time.time() - self.start_time
         if elapsed > execution_timeout:
             return False, f"Execution timed out: {execution_timeout}s"
 
@@ -406,7 +406,7 @@ async def stream_async(
                 self.state.completion_status = Status.FAILED
                 raise
             finally:
-                self.state.execution_time = round((time.time() - self.state.start_time) * 1000)
+                self.state.execution_time += round((time.time() - self.state.start_time) * 1000)
                 await self.hooks.invoke_callbacks_async(AfterMultiAgentInvocationEvent(self, invocation_state))
                 self._resume_from_session = False
 
diff --git a/tests/strands/multiagent/test_swarm.py b/tests/strands/multiagent/test_swarm.py
index f2abed9f7..aae11b709 100644
--- a/tests/strands/multiagent/test_swarm.py
+++ b/tests/strands/multiagent/test_swarm.py
@@ -1243,6 +1243,8 @@ def test_swarm_interrupt_on_before_node_call_event(interrupt_hook):
 
     multiagent_result = swarm("Test task")
 
+    first_execution_time = multiagent_result.execution_time
+
     tru_status = multiagent_result.status
     exp_status = Status.INTERRUPTED
     assert tru_status == exp_status
@@ -1279,6 +1281,8 @@ def test_swarm_interrupt_on_before_node_call_event(interrupt_hook):
     exp_message = "Task completed"
     assert tru_message == exp_message
 
+    assert multiagent_result.execution_time >= first_execution_time
+
 
 def test_swarm_interrupt_on_agent(agenerator):
     exp_interrupts = [