It depends on the state you are in and how many children you have to pay support on and your monthly income. It can range from 25% for one, 35% for two. But the best way to find out is to contact the child support office and ask. The court order ordering support payments will state how much one has to pay and that is normally until the child is 18 and graduates form High School and in some states it can be longer, thats why it is best to contact child support.
This answer was edited by USAFRET91 91 days ago.
Reason: added a comment
