When child support ends in Oklahoma
When payments stop, when they can continue, and why past-due support is still owed.
Checked against official sources: Oct 25, 2026.
Short answer
18, or until high school graduation or age 20, whichever comes first, if the child is a full-time high school student.
- Usual end age
- 18
- Latest age in the rule
- 20
- Law
- 43 O.S. 112(E), 112.1A
When support stops in Oklahoma
18, or until high school graduation or age 20, whichever comes first, if the child is a full-time high school student. No new court order is needed for the extension.
Law: 43 O.S. 112(E), 112.1A
A court can order support for an indefinite period for an adult child with a mental or physical disability that began before 18 and who cannot support himself or herself.
Law: 43 O.S. 112.1A
When does support end? Check your situation
Moved to another state?
How long support lasts follows the law of the state that made the order, even if you move.
Law: 28 U.S.C. 1738B(h)(2)
A state must enforce another state's child support order. The state that made the order keeps the power to change it while a parent or the child still lives there.
Law: 28 U.S.C. 1738B(a), (d)
What is owed stays owed
Support that was due before it ended is still owed. Each unpaid payment became a judgment on the day it was due, and the agency can keep collecting it.
Law: 42 U.S.C. 666(a)(9)
In nearby states
Your next steps in Oklahoma
Look at the end date
Check what your order says about when support ends.
Know the age
In Oklahoma: 18, or until high school graduation or age 20, whichever comes first, if the child is a full-time high school student.
Contact the agency
Tell the agency about graduation or a change, and ask how withholding stops: Oklahoma Human Services, Child Support Services (CSS) ((405) 522-2273) · Apply online
Pay or collect arrears
Arrears can still be collected after support ends.
Get help
Ask for free help: Legal Aid Services of Oklahoma.
Where to get free help in Oklahoma
Questions about when support ends in Oklahoma
At what age does child support stop in Oklahoma?
18, or until high school graduation or age 20, whichever comes first, if the child is a full-time high school student. No new court order is needed for the extension.
What if my child is still in high school in Oklahoma?
18, or until high school graduation or age 20, whichever comes first, if the child is a full-time high school student.
Are there exceptions to the end age in Oklahoma?
A court can order support for an indefinite period for an adult child with a mental or physical disability that began before 18 and who cannot support himself or herself.