# Timeouts | Modal Docs

- **URL:** https://modal.com/docs/guide/timeouts
- **Summary:** All Modal Function executions have a default execution timeout of 300 seconds (5 minutes), but users may specify timeout durations between 1 second and 24 hours.

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Timeouts
========

All Modal [Function](https://modal.com/docs/sdk/py/latest/modal.Function)
 executions have a default execution timeout of 300 seconds (5 minutes), but users may specify timeout durations between 1 second and 24 hours.

    import time
    
    
    @app.function()
    def f():
        time.sleep(599)  # Timeout!
    
    
    @app.function(timeout=600)
    def g():
        time.sleep(599)
        print("*Just* made it!")

The timeout duration is a measure of a Function’s _execution_ time. It does not include scheduling time or any other period besides the time your code is executing in Modal. This duration is also per execution attempt, meaning Functions configured with [`modal.Retries`](https://modal.com/docs/sdk/py/latest/modal.Retries)
 will start new execution timeouts on each retry. For example, an infinite-looping Function with a 100 second timeout and 3 allowed retries will run for least 400 seconds within Modal.

### Container startup timeout 

A Function’s `startup_timeout` configures the container’s _startup_ time. Your container may be taking a long time to startup because it is loading large data, initializing a large model or importing many packages. In these cases, you can extend the `startup_timeout` of your Function.

    @app.cls(startup_timeout=30, timeout=10)
    class MyFunction:
        @modal.enter()
        def startup(self):
            time.sleep(20)
    
        @modal.method()
        def f(self):
            time.sleep(1)

`startup_timeout` was added in v1.1.4. Prior to v1.1.4, `timeout` configures the _execution_ time and _startup_ time. If `startup_timeout` is not set, `timeout` will still configure both times.

Handling timeouts 

After exhausting any specified retries, a timeout in a Function will produce a `modal.exception.FunctionTimeoutError` which you may catch in your code.

    import modal.exception
    
    
    @app.function(timeout=100)
    def f():
        time.sleep(200)  # Timeout!
    
    
    @app.local_entrypoint()
    def main():
        try:
            f.remote()
        except modal.exception.FunctionTimeoutError:
            ... # Handle the timeout.

Timeout accuracy 

Functions will run for _at least_ as long as their timeout allows, but they may run a handful of seconds longer. If you require accurate and precise timeout durations on your Function executions, it is recommended that you implement timeout logic in your user code.

[Timeouts](https://modal.com/docs/guide/timeouts#timeouts)
[Container startup timeout](https://modal.com/docs/guide/timeouts#container-startup-timeout)
[Handling timeouts](https://modal.com/docs/guide/timeouts#handling-timeouts)
[Timeout accuracy](https://modal.com/docs/guide/timeouts#timeout-accuracy)