After being hired for an hourly job, I informed the client that I would prefer being paid on a fixed-price basis. However, neither she nor I know how to do this. Can anyone help? Could she, for example just pay me aq 'bonus'?
You could also just claim manual hours until it meets the amount you agreed to. I've done this before.
So, if the fixed price is $100 and you've agreed to an upfront payment of $50, then just claim enough manual hours to reach the upfront payment. Then when the job is complete, claim enough manual hours to get the rest of the money.
Just remember manual hours are not guaranteed, but then again, neither is a fixed-price job. Just make sure to get some money upfront.