[mikebos]

Hourly is the way to go, just set a minimum charge or an added charge because they want it now. I would suggest a minimum of a workday.

[strawpeople]

> I would suggest a minimum of a workday.

This is key. An emergency disrupts your scheduling and easily justifies a workday as a minimum.

[AlexITC]

Agree, another friend suggested setting an emergency rate which is 2x the normal rate.

[AlexITC]

I like this idea, it would have been specially useful in my last situation where I figured out how to deploy the app in just 2h, now, my customer thanked me and moved on to give the missing work to someone else.

Thanks.