Thanks, but hourly billing is kind of defense for overtimes - I bill at the end of the months, but with the total number of hours worked. When you bill weekly

Thanks, but hourly billing is kind of defense for overtimes - I bill at the end of the months, but with the total number of hours worked. When you bill weekly - initially, a fixed 40 hr/week is assumed. But the client might push as much work as possible for that week... Another option could be: Weekly (or monthly) billing + hourly for overtimes.