How Long Does Child Support Last? Termination Rules by State

When Does Child Support End?

There is no single national age at which child support ends. The Office of Child Support Services notes that "duration of support" rules are entirely state-determined. The most common termination age is 18, but seven states use 19 (typically tied to high school completion), and four jurisdictions — New York, Mississippi, Indiana, and the District of Columbia — extend support to age 21.

Crucially, aging out of an order does not erase arrears. Past-due support remains collectible indefinitely in nearly every state, even decades after the child is grown.

State-by-State Age of Emancipation

The table below reflects the default age at which a current child support obligation terminates if the child is otherwise emancipated.

| State | Default Age | Notes | | --- | --- | --- | | Alabama | 19 | | | Alaska | 18 (19 if HS student) | | | Arizona | 18 (19 if HS) | | | Arkansas | 18 (19 if HS) | | | California | 18 (19 if HS, full-time) | | | Colorado | 19 | | | Connecticut | 18 (19 if HS) | | | Delaware | 18 (19 if HS) | | | District of Columbia | 21 | | | Florida | 18 (19 if HS, expected to graduate before 19) | | | Georgia | 18 (20 if HS) | | | Hawaii | 18 (23 if college, by stipulation) | | | Idaho | 18 (19 if HS) | | | Illinois | 18 (19 if HS); college support discretionary | | | Indiana | 19; college support discretionary | | | Iowa | 18 (19 if HS); college through age 23 | | | Kansas | 18 (until June after 18 if HS) | | | Kentucky | 18 (19 if HS) | | | Louisiana | 18 (19 if HS) | | | Maine | 18 (19 if HS) | | | Maryland | 18 (19 if HS) | | | Massachusetts | 18 (up to 23 if dependent on parent / in college) | | | Michigan | 18 (19.5 if HS) | | | Minnesota | 18 (20 if HS) | | | Mississippi | 21 | | | Missouri | 18 (21 if college, full-time) | | | Montana | 18 (19 if HS) | | | Nebraska | 19 | | | Nevada | 18 (19 if HS) | | | New Hampshire | 18 (or HS graduation) | | | New Jersey | 19 (extendable to 23 for college) | | | New Mexico | 18 (19 if HS) | | | New York | 21 | | | North Carolina | 18 (20 if HS) | | | North Dakota | 18 (19 if HS) | | | Ohio | 18 (19 if HS) | | | Oklahoma | 18 (20 if HS) | | | Oregon | 18 (21 if a "child attending school") | | | Pennsylvania | 18 (or HS graduation) | | | Rhode Island | 18 (90 days post-HS) | | | South Carolina | 18 (or HS graduation) | | | South Dakota | 18 (19 if HS) | | | Tennessee | 18 (or HS graduation, max age 19) | | | Texas | 18 (or HS graduation) | | | Utah | 18 (or HS, whichever later) | | | Vermont | 18 (or HS graduation) | | | Virginia | 18 (19 if HS, full-time, dependent) | | | Washington | 18 (post-secondary support discretionary) | | | West Virginia | 18 (20 if HS) | | | Wisconsin | 18 (19 if HS) | | | Wyoming | 18 (20 if HS) | |

Does Child Support Stop Automatically?

In most states, no — and this trips up payers regularly.

Whether support ends automatically depends on whether the support order:

1. Is for a single child (often terminates automatically by date in the order), or
2. Covers multiple children (typically requires a modification when one ages out).

Even in single-child cases, the income withholding order continues to garnish wages until the employer is officially notified by the state agency to stop. Always file a formal motion to terminate — and request that the state child support agency close the case — to avoid overpayment.

What Triggers Early Termination?

Several events can end a child support obligation before the default age:

• Marriage of the child — Recognized as automatic emancipation in nearly all states.
• Active military service — Treated as emancipation under most state statutes.
• Death of the child — Terminates current support (arrears remain collectible).
• Death of the obligor — Terminates current support, though arrears become a claim against the estate.
• Court-declared emancipation — Available in most states for minors who are self-supporting and no longer under parental control.
• Adoption — Termination of parental rights also terminates the support obligation.

Living with a romantic partner or having a child of one's own does not automatically emancipate the child in most states, despite a common misconception.

Can Child Support Continue Past 18?

Yes — typically in three scenarios:

1. The Child Is Still in High School

This is the most common extension. About 40 states extend support until the child either turns 19 or graduates high school (whichever comes first). Florida, for example, requires the child to be expected to graduate before turning 19.

2. College Support

Eleven states allow courts to order parents to contribute to college expenses: Connecticut, Hawaii, Illinois, Indiana, Iowa, Massachusetts, Missouri, New Hampshire, New Jersey, New York, and Oregon, plus the District of Columbia. Caps are common — for example, Iowa caps "post-secondary education subsidy" at one-third of in-state tuition at the University of Iowa.

3. Adult Disabled Children

All 50 states allow courts to order indefinite support for an adult child who has a severe disability that began before the age of majority. The legal standard is generally "incapacitated and dependent" or "unable to maintain themselves." A court order entered before the child turns 18 (or in some states before 19 or 21) is required to extend support beyond emancipation.

How Do You Modify a Post-18 Order?

To extend, modify, or terminate child support around the age of majority, the obligor or recipient must file a motion to modify. Required steps typically include:

| Step | Purpose | | --- | --- | | File a motion in the issuing court | Establish jurisdiction | | Serve the other parent | Due process requirement | | Provide updated financial affidavit | Recalculate income | | Submit proof of qualifying status | High school enrollment, college transcript, disability documentation | | Attend a hearing | Court ruling |

Don't rely on private agreements. Per the federal Bradley Amendment (42 U.S.C. § 666(a)(9)), child support arrears cannot be retroactively modified — even by agreement of the parents — so any change must be court-ordered.

Frequently Asked Questions

Does child support automatically stop at 18?

Almost never. Even when the underlying obligation expires, the wage withholding order continues until the employer is officially notified. File a motion to terminate to be safe.

Can my ex sue me for college expenses if our state doesn't authorize it?

Generally no. Only the 11 states (plus DC) listed above authorize courts to order college support. In other states, college contributions are voluntary unless agreed to in a property settlement or divorce decree.

What if my child has a disability?

You should petition for continued support before the child reaches the state's age of emancipation. Courts in most states are reluctant to retroactively re-establish jurisdiction once an obligation has terminated.

Do I still owe arrears after the child turns 18?

Yes. Arrears are not extinguished by the child reaching majority. Tax intercepts, license suspension, and credit reporting can continue indefinitely.

Does child support automatically extend during college?

Only in states that authorize post-secondary support and only if the order or judgment specifically provides for it. Otherwise, support ends at the state's default age regardless of enrollment status.

Sources

• Office of Child Support Services (OCSS, U.S. Department of Health & Human Services) — Intergovernmental Reference Guide (state-by-state termination rules).
• National Conference of State Legislatures (NCSL) — Termination of Child Support (state statutes summary).
• U.S. Census Bureau — Custodial Mothers and Fathers and Their Child Support (Current Population Reports, P60-279).
• Internal Revenue Code & Bradley Amendment (42 U.S.C. § 666(a)(9)) — Federal limit on retroactive modification.
• American Bar Association — Family Law Quarterly charts on age of majority and post-secondary support.

Editorial Team — American Child Support Calculator. This article is for educational purposes only and is not legal advice. State termination rules change frequently; consult a licensed family-law attorney before relying on the information above.