Another exception to the "18-year rule" is if a child is disabled. If you're a non-custodial parent paying child support for a physically disabled or mentally disabled person, then you could owe child support for an indefinite period of time.
Unlike some U.S. states, parents in Arizona have no legal obligation to support a child through college or pay for a child's college expenses. While there's no state law regarding non-custodial parents to pay child support after the child finishes high school, FindLaw states that parents will sometimes make a legal agreement on college payments in a divorce settlement. Courts can usually enforce these agreements.
When it comes to drafting a legal agreement, it's important to get a Phoenix family law attorney involved in the process so that your needs are being properly represented in the agreement. Phoenix family lawyers also can help a person who is looking to modify an existing child support order.