You and your child's other parent may agree to modify the child support terms, but even an agreed-upon modification for child support must be approved by a judge to be legally enforceable. Children are entitled to be supported by their parents in the same way they would have been had their parents not separated. Child Support A glance at the child support in each state. Includes the history and statutes. There have been some question regarding gross versus net income used for support calculations.
Most states use gross, but the actual breakdown can be seen below.