Answers
Child Support Questions
Short, direct answers to what parents ask most.
How to use this page: review the guidance below, enter the requested information, and compare the estimate with your state's official rules before making legal or financial decisions.
- Does child support end at 18?
In most states child support ends at 18 or high school graduation, but some states run to 19 or 21. See the common rules and exceptions.
- How is child support calculated?
Child support is calculated with one of three state formulas: income shares, percentage of income, or Melson. Learn how each one works.
- How much is child support for one child?
Child support for one child is often 14% to 20% of the paying parent's income in percentage states. See how the amount is figured in your state.
- Can child support be modified?
Child support can be modified after a substantial change in circumstances, such as a big income change. Learn the usual tests and next steps.
- What happens if you don't pay child support?
Unpaid child support can lead to wage garnishment, tax refund intercepts, license and passport loss, and contempt. See the enforcement tools.