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When Does Child Support End in Ontario? Ages, School and Exceptions

Learn when child support ends in Ontario, including age 18, full-time school, disability, and why you may need an agreement or court order to stop payments.

Family Law4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 13, 2026
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Key takeaways
  • Ontario does not end child support automatically when a child turns 18, and an order or agreement can set an end date or a terminating event.
  • A parent's duty can continue for an unmarried child in a full-time education program, or who cannot withdraw from parental charge because of illness, disability or other cause.
  • If your order or agreement is silent about an end date, both parties must agree to end payments or a judge decides.

Whether you pay support or receive it, the question comes up sooner or later: when does it stop? Many people assume payments end on a child's 18th birthday. In Ontario, it is not that simple.

This article explains the general rules for age, school and disability, why the wording of your order or agreement matters, and what to do if you think support should end.

No automatic end at 18

Ontario does not end child support automatically when a child turns 18.

If your order or agreement says nothing about an end, both parties must agree to end payments, or a judge decides. Stopping on your own, without agreement or a decision, can leave you exposed to arrears.

Who counts as a child who must be supported

The rules depend on whether you were married and whether you are divorcing. Never-married parents, and married parents who are separating without divorcing, are under the Family Law Act and O. Reg. 391/97 rather than the Divorce Act. Divorcing parents are under the Divorce Act.

SituationGeneral rule
Unmarried child who is a minorEvery parent must support the child, to the extent the parent is capable of paying.
Unmarried child in a full-time education programThe duty continues under the Family Law Act.
Child who cannot withdraw from parental charge because of illness, disability or other causeThe duty continues under the Family Law Act.
Child aged 16 or older who has withdrawn from parental controlThe Family Law Act support duty does not extend to that child.
Divorce Act: child at or over the age of majorityStill a child of the marriage if under the parents' charge and unable to withdraw or obtain the necessaries of life because of illness, disability or other cause.

Whether a child has truly withdrawn from parental control or charge, or an adult child is still dependent, depends on the facts. A lawyer can help you assess your situation.

School, college and university

A child who is enrolled in a full-time program of education can still be owed support under the Family Law Act. For a child at or over the age of majority, such as one at college or university, the amount is set by applying the guidelines as if the child were a minor. If the court finds that inappropriate, it may set the amount it considers appropriate, having regard to the child's circumstances and each parent's ability to contribute.

Expenses for post-secondary education are listed as a special or extraordinary expense that can be added to the table amount.

Ending or changing payments the right way

If your order or agreement has an end date or terminating event, check its exact wording first. If it is silent, you need the other parent's agreement or a judge's decision.

Where there has been a change in circumstances under the guidelines, or new evidence is available, a court may discharge, vary or suspend child support, prospectively or retroactively. It may also relieve the payor from paying part or all of the arrears or interest.

What to do next

Frequently asked questions

Does child support stop when my child turns 18 in Ontario?

Not automatically. An order or agreement can set an end date or terminating event, and if it is silent, both parties must agree to end payments or a judge decides.

Does support continue while my child is in university?

It can. Under Ontario's Family Law Act, a parent must support an unmarried child who is enrolled in a full-time program of education, to the extent the parent is capable of paying. For divorcing parents, the Divorce Act asks instead whether the person is a "child of the marriage", and an adult child who is still under their parents' charge but cannot withdraw or obtain the necessaries of life because of illness, disability or other cause may qualify. For a child at or over the age of majority, the guidelines are applied as if the child were a minor, unless the court finds that inappropriate. Post-secondary costs can also be added as a special or extraordinary expense.

Can I stop paying if I am being denied parenting time?

FRO tells payors that denied parenting time does not suspend support and to keep paying until FRO says in writing they can stop. The remedy is to ask the court to enforce the parenting order.

What if my child has a disability?

The duty can continue for an unmarried child who cannot withdraw from parental charge because of illness, disability or other cause. Under the Divorce Act, a similar rule applies to a child at or over the age of majority. A lawyer can confirm how this applies to your facts.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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