Depends on the project and client. If the client cares at all, I just write down how long something took. If it's 1.05 hours, so be it. BUT... I don't generall

Depends on the project and client. If the client cares at all, I just write down how long something took. If it's 1.05 hours, so be it. BUT... I don't generally do anything that isn't at least a half day, totaled up. But if I do 3 things in that half day, I find some clients benefit from seeing how much time each thing took. It helps them to get more realistic about their time expectations. Other clients could give a toss, and for them, I just send a one line invoice: "Web development: $x,xxx"