Child support in Washington ends when your child turns 18, graduates from high school, or dies — whichever comes first

Washington law sets a hard stop on child support obligations. The age of majority is 18, and that is the default end date. If your child is still in high school when they turn 18, support continues until they graduate or turn 19, whichever is earlier. If your child dies, the obligation ends immediately. There is no automatic extension past these points, even if your child is in college or not yet self-supporting.

The parent paying support (the obligor) does not need to file paperwork to end it — the obligation simply stops on the date it reaches. However, if the other parent keeps collecting payments after that date, you can file a motion to recover the overpayment. The Department of Social and Health Services (DSHS) Division of Child Support stops processing payments automatically once a child reaches the end date in their case, but delays sometimes happen. Confirming the end date with your case worker before the cutoff date prevents confusion.

Key Takeaways

  • Child support ends on your child's 18th birthday unless they are still enrolled in high school, in which case it continues until graduation or age 19, whichever comes first.
  • The paying parent does not need to file anything to end support — it stops automatically on the date set by the court order.
  • If the receiving parent continues to collect after the end date, the paying parent can file a motion to recover the overpayment through the court.
  • Contact your DSHS case worker or the court that issued the order to confirm the exact end date for your case, since school enrollment status affects the deadline.

How the 18-Year-Old Rule Works

Washington's default rule is straightforward: support ends when the child turns 18. This applies whether the child is still in school, working, living with a parent, or living independently. The court order itself will state the end date, usually written as "until the child reaches age 18" or "until [child's name] turns 18 on [specific date]."

The obligor (the parent paying) is responsible for knowing this date. If you are paying through DSHS, your case statement will show the end date. If you are paying directly to the other parent under a private agreement, you should have a copy of the court order that shows when payments stop. Marking the date on a calendar three months before it arrives gives you time to confirm with the other parent or the court that the case will close on schedule.

The High School Exception: Staying in School Past 18

If your child is still enrolled in high school when they turn 18, Washington law extends support until one of two things happens: they graduate or they turn 19, whichever is sooner. This means a child who turns 18 in September but is a senior in high school will have support continue through graduation in June. A child who turns 18 and is not in high school has no extension — support ends on their birthday.

The school enrollment status matters legally. DSHS and the court use enrollment records to determine whether the extension applies. If there is a dispute about whether the child is actually in school, the parent paying can request proof of enrollment from the school district. Some cases include language requiring the receiving parent to provide proof of continued enrollment by a certain date each year.

Once the child graduates or turns 19, the extension ends and support stops completely. There is no further obligation even if the child is unemployed, in college, or still living with the receiving parent.

What Happens When a Child Dies

If the child dies before the support obligation ends, the obligation terminates immediately. The paying parent is not required to continue payments to the receiving parent or the child's estate. The receiving parent must notify DSHS or the court of the child's death so the case can be closed and payments stopped.

If payments continue after the child's death because DSHS was not notified, the paying parent can file a motion to recover those overpayments. Providing a death certificate to DSHS or the court accelerates the case closure and prevents further collection.

Ending Support When Multiple Children Are Involved

When a support order covers more than one child, each child's support ends on their individual end date. The court order will list each child and their separate end date. As each child reaches 18 (or graduates from high school if the extension applies), their portion of the support obligation ends, and the payment amount is recalculated for the remaining children.

For example, if a parent is ordered to pay $500 per month for two children, and one child turns 18 and is not in high school, the payment drops to cover only the remaining child. DSHS recalculates the amount automatically, but you should verify the new amount on your next case statement. If the other parent disputes the recalculation, either party can request a review or file a motion to modify.

How to Confirm Your Child Support End Date

The most direct way to find your end date is to look at your court order. The order will state the date support ends, usually written as a specific birthday or "until age 18" or "until graduation from high school." If you do not have a copy, you can request one from the court that issued the order or from DSHS if they are handling the case.

If you are receiving services from DSHS Division of Child Support, your case statement (sent monthly or available online through your account) shows the end date. You can also call your case worker directly. Have your case number ready. If you are paying or receiving support through a private agreement without DSHS involvement, contact the other parent or the attorney who drafted the order to confirm the date.

If your child is currently 17 or 18 and still in high school, confirm their expected graduation date with the school. This determines whether the extension applies and when support actually ends.

What Happens If Support Does Not Stop on Time

If you are the paying parent and the other parent continues to collect after the end date, you have the right to file a motion in court to recover the overpayment. You will need to show the court order proving the support obligation ended and documentation that payments continued after that date. DSHS records or bank statements showing the payments are sufficient proof.

The court can order the receiving parent to repay the amount collected after the end date. However, you must file the motion within a reasonable time — waiting years to challenge the overpayment weakens your case. If you are paying through DSHS and they continue to collect by mistake, contact your case worker immediately to stop the payments and request a review of the overpayment.

If you are the receiving parent and payments stop before you believe they should, you can file a motion to enforce the order or request a review if you believe the end date was calculated incorrectly. This is rare, but it can happen if the child's school enrollment status was disputed or if the court order language was ambiguous.

Modifying Support Before It Ends

Either parent can request a modification of the support amount at any time before the obligation ends, including in the months just before the end date. A modification does not extend the end date — it only changes the payment amount. Common reasons for modification include a significant change in income, a change in custody, or a change in the child's needs.

To request a modification, file a motion with the court that issued the original order, or contact DSHS if they are handling the case. DSHS can review the case for modification if circumstances have changed. The process takes several weeks, so if you want a change in place before support ends, file early.

Frequently Asked Questions

Does child support continue if my child goes to college?

No. Washington law does not require support to continue for college attendance. Support ends at 18 (or at high school graduation if the child is still in school and under 19) regardless of whether the child is in college, working, or unemployed. Some parents negotiate private agreements to help with college costs, but the court-ordered obligation ends.

What if my child drops out of high school after turning 18?

Support ends on their 18th birthday. The high school extension only applies if the child is still enrolled. If they drop out, the extension does not apply and support stops immediately, even if they later earn a GED or return to school.

Can I ask the court to extend support past 18?

Washington law does not allow courts to extend child support past 19 or high school graduation, whichever is earlier. The statute sets a firm end date. You cannot ask a judge to order support to continue through college or beyond age 19 under the child support statute, though parents can make private agreements outside of court.

What if the child support order does not say when it ends?

Washington law assumes support ends at 18 (or at high school graduation if applicable) even if the order does not explicitly state it. If the order language is unclear, either parent can file a motion asking the court to clarify the end date. Contact the court or an attorney if you need clarification.

Do I need to tell DSHS when my child turns 18?

No, but confirming with your case worker that the case will close on the correct date prevents delays. DSHS has the child's birthdate on file and closes cases automatically, but notifying them early reduces the chance of a processing error or overpayment.