I have a client that often calls with small jobs that only take a few minutes but I charge for 15 minutes as a minimum. He can call several times a day with jobs like this, which is fine but then I find myself billing for an hour when the jobs themselves actually took less than half that time.
Am I doing the right thing? I feel that I am and he has never questioned it (probably because he has no idea how long these tasks take!) but someone else has said that I should only charge for the minutes I work.
But I feel that if I did that then it would be worth me doing any work at all for him.