Florida requires that both parents support any minor children to the best of their financial abilities. Neither party can waive the child support obligation, as it belongs to the child.

Generally, the party who retains primary custody of a child will be entitled to support until the child reaches 18. Child support can continue after age 18 as a result of an agreement by the parents or certain conditions, such as disabilities, that require constant support.
Modification of Child Support
Either parent may seek modification of any child support order. For the court to order a modification, a judge must find that the modification serves the best interests of the child and that there has been a substantial change in circumstances or the child is no longer eligible for support. If modification is appropriate, the court may increase or decrease the monthly support payment or may alter the terms of payment.
Termination of Child Support
In Florida, the child support obligation ends when a child reaches age 18. It will also terminate if the child is emancipated, enters into a valid marriage, dies, or joins the military.