You get a call…Emergency!
You pick up your tools, make apologies to the customer who’s job you are on, and drive fifteen minutes to the emergency.
The place is locked up. (you would think they would be waiting) You call the shop for a number, call the customer, and they tell you, “Oh, never mind. We figured it out and we don’t need you now.”
Do you bill them?
If it is a regular customer?
My answer is that they get the minimum one hour charge. Unless it took me away from my other job for more than that. Then for the time I was away.
If you haven’t drawn blood today, you haven’t done anything.