Unreal Engine 5 · Blueprint → C++
Clear and Invalidate Timer by Handle in Unreal Engine 5 C++
The Clear and Invalidate Timer by Handle node maps to GetWorldTimerManager().ClearTimer() in C++, which stops a running timer and invalidates its FTimerHandle.
Blueprint node & C++ equivalent
#include "TimerManager.h"
FTimerHandle ExampleTimerHandle;
// Clear and invalidate timer handle
GetWorldTimerManager().ClearTimer(ExampleTimerHandle);What does Clear and Invalidate Timer by Handle do?
This node stops a timer that you previously started and frees the handle so it no longer refers to an active timer. Use it to cancel a pending delay or to stop a looping timer before its natural end.
It operates on the Timer Handle returned by Set Timer, so you need to keep that handle around to clear the correct timer.
The C++ equivalent
Include TimerManager.h and call GetWorldTimerManager().ClearTimer(ExampleTimerHandle). This both stops the timer associated with the handle and invalidates the handle, matching the Blueprint node's two-in-one behavior.
Passing a handle that is already invalid or never set is safe; ClearTimer simply does nothing in that case. The handle must be the same FTimerHandle you passed to SetTimer for it to find and stop the right timer.
When to use it
Call ClearTimer when gameplay state changes and a scheduled or repeating callback should no longer run, for example cancelling a reload timer when a weapon is swapped. Clearing timers in EndPlay is also good practice so callbacks don't fire on a destroyed object.
Because ClearTimer invalidates the handle, you do not need a separate Invalidate() call afterward in most cases.
Frequently asked questions
How do I stop a timer in Unreal Engine 5 C++?+
Call GetWorldTimerManager().ClearTimer(YourTimerHandle) with the FTimerHandle you got from SetTimer. This stops the timer and invalidates the handle in one step.
What is the difference between ClearTimer and Invalidate?+
ClearTimer stops the active timer in the TimerManager and invalidates the handle. Invalidate only resets the handle struct itself and does not stop a running timer, so ClearTimer is what you want to actually cancel a timer.
Is it safe to clear a timer that isn't running?+
Yes. Calling ClearTimer with an invalid or already-cleared handle is a no-op and will not crash, so you can call it defensively.