Child support typically ends when a child reaches the age of majority — 18 in most states, 19 in a few, and 21 in a handful. But the actual cutoff depends on whether the child is still in high school, has a disability, or lives in a state that extends support for college. Here's the complete state-by-state breakdown for 2026, along with the exceptions every parent should know.
The default rule: age 18 or high school graduation
In about 35 states, child support continues until the child turns 18 OR graduates from high school, whichever comes later. This prevents support from cutting off mid-senior-year. The upper limit is usually capped at age 19 or 19½ — so a child held back multiple grades doesn't receive support indefinitely.
State-by-state termination ages (2026)
| State | Default age | Notes |
|---|---|---|
| California | 18 (19 if in HS) | Indefinite for disabled adult children |
| Texas | 18 or HS graduation | Indefinite for disability beginning before 18 |
| Florida | 18 (19 if in HS, on track to graduate) | |
| New York | 21 | One of the longest in the US |
| Illinois | 18 or HS graduation (max 19) | College support possible by court order |
| Pennsylvania | 18 or HS graduation | No automatic college support |
| Ohio | 18 (19 if in HS) | |
| Georgia | 18 (20 if in HS) | |
| North Carolina | 18 (20 if in HS) | |
| Michigan | 18 (19½ if in HS, living with recipient) | |
| Massachusetts | Up to 23 with college | Post-secondary support common |
| Indiana | 19 (or 21 with college) | Up to 21 if attending post-secondary education |
| Mississippi | 21 | |
| New Jersey | 19 (extendable to 23) | Court order required to terminate |
Disability extensions
Almost every state allows support to continue past adulthood when the child has a disability that began before age 18 (or 22 in some states) and renders them incapable of self-support. These are sometimes called "Castle" orders, after a key Indiana case. The order may pay out to the disabled adult directly, to a special-needs trust, or to the custodial parent.
College support: state-by-state
- States that can require college contributions: Massachusetts, New Jersey, New York, Illinois, Washington, Indiana, Iowa, Mississippi, South Carolina (case-by-case)
- States with no college support: Most others, including Texas, Florida, California, Pennsylvania, Ohio, Georgia, North Carolina, Michigan
- How much: Typically capped at the in-state public university tuition, with both parents contributing in proportion to their income
What ends support early?
Several events terminate support before the default age:
- Emancipation: The child marries, joins the military, or otherwise becomes legally independent
- Adoption: If the child is adopted, the biological parent's obligation usually ends
- Death: Of the child or of the paying parent (though the estate may owe arrears)
- Custody change: If the child moves in with the paying parent full-time
How to actually terminate the order
Critical mistake: support doesn't always end automatically. In many states, you must file a Motion to Terminate (sometimes free, sometimes with a small fee). Until you do, payments keep accruing — and any missed payments become arrears. Always confirm termination in writing with your state's child support enforcement agency.
See your state's specific guideline rules: New York, Illinois, or California. To estimate ongoing amounts, try our free calculator.
Frequently Asked Questions
Does child support automatically stop on the 18th birthday?
Not always. In most states, support continues until high school graduation if the child is still enrolled. You usually have to file paperwork to terminate the order — it doesn't end on its own.
Which states have the longest child support?
New York extends support to age 21. Indiana, Massachusetts, and Mississippi can extend to 21 in certain cases. New Jersey requires a court order to terminate even after 19.
Can child support continue past 18 for college?
Yes in some states. Massachusetts, New Jersey, New York, Illinois, and Washington can order parents to contribute to college expenses, sometimes called 'post-secondary support.'
What if my child is disabled?
Most states allow support to continue indefinitely for a child who is incapable of self-support due to a disability that began before adulthood.
Related Reading
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