That is up to your state and the child support laws. Each one is different. And also remember that he has to comply with the courts on his true earnings. If you have income, that will also be figured into it. It won't matter so much unless you make a good amount too. The courts have a system they use to figure out cost of living and expenses. Each state has different economics. If you have been divorced and he is NOW making that much, then you need to notify the court that you would like to file for a MOTION TO AMEND on the original divorce decree. If he was not making this much at the divorce, then the amount is going to be different. He has to comply with a court order and supply his income to the courts.