When Does Child Support End in Ontario? 2026 Complete Guide

When Does Child Support End in Ontario?

Child support in Ontario does not automatically end when a child turns 18. Under the Family Law Act, R.S.O. 1990, c. F.3, s. 31(1), parents must support unmarried children who are minors or enrolled in full-time education. Under the Divorce Act, R.S.C. 1985, c. 3, s. 2(1), a "child of the marriage" includes anyone over 18 who cannot withdraw from parental charge due to illness, disability, or other cause such as pursuing post-secondary education. In practice, Ontario courts routinely order child support to continue until ages 22 to 25 for full-time students completing their first degree or diploma.

The Age of Majority Rule and Child Support Age in Ontario

Child support in Ontario ends at age 18 only when the child is no longer a dependent. Ontario's age of majority is 18 under the Age of Majority and Accountability Act. However, reaching age 18 does not automatically terminate a child support obligation under either provincial or federal law. The paying parent must take affirmative steps to end the obligation, either through a written agreement or a court order. Stopping payments without legal authorization creates arrears that the Family Responsibility Office (FRO) will enforce through wage garnishment, license suspension, or even imprisonment.

The distinction between provincial and federal jurisdiction matters. If the parents were married and divorced under the Divorce Act, R.S.C. 1985, c. 3, s. 2(1), the federal definition of "child of the marriage" applies. If the parents were never married or are separated but not divorced, the Family Law Act, R.S.O. 1990, c. F.3, s. 31(1) governs. Both statutes extend child support obligations beyond age 18 in specific circumstances, but the wording differs slightly.

Under the Family Law Act, the obligation extends to an unmarried child who "is enrolled in a full-time program of education." Under the Divorce Act, the obligation extends to a child over 18 who is "unable, by reason of illness, disability or other cause, to withdraw from their charge or to obtain the necessaries of life." Ontario courts have consistently interpreted "other cause" to include full-time post-secondary education.

When Child Support Continues Past 18: The Student Exception

Child support in Ontario continues past age 18 when a child is enrolled full-time in a recognized post-secondary program, with courts typically ordering support until ages 22 to 25 for first-degree completion. This is the most common reason when does child support end Ontario becomes a contested issue. Under FLA s. 31(1), Ontario courts require parents to contribute to a child's education expenses to the extent the parent is capable of doing so.

Ontario courts examine several factors when determining whether to extend support for a student:

• The child must be enrolled full-time in a recognized college, university, or vocational program
• The educational pursuit must be reasonable and the child must be making meaningful progress
• The child must remain financially dependent on the parents
• The child's own contributions matter, including scholarships, student loans, RESP withdrawals, and part-time employment income
• The parents' ability to pay is assessed against their current income and obligations
• A reduced course load due to documented health issues may still qualify as full-time enrollment

Section 7 of the Federal Child Support Guidelines, SOR/97-175 allows courts to order both parents to share extraordinary education expenses in proportion to their incomes. These expenses include tuition fees, textbook costs, mandatory residence fees, meal plans, transportation costs, and student health insurance premiums. Courts expect children to contribute what they reasonably can, but student loan availability does not eliminate the parental obligation.

Ontario courts rarely extend child support past age 25 and almost never fund a second undergraduate degree. Graduate school funding is evaluated on a case-by-case basis, with courts requiring stronger justification for continued parental support at that stage.

Early Termination: When Child Support Ends Before 18

Child support in Ontario can end before age 18 if a child aged 16 or older voluntarily withdraws from parental control, as specified in FLA s. 31(2). The withdrawal must be genuinely voluntary. A child forced to leave due to abuse, neglect, or unsafe conditions has not voluntarily withdrawn, and the parent's support obligation continues in those circumstances.

Child support also ends early in Ontario under these specific conditions:

• The child marries at any age, which terminates the support obligation entirely
• The child enlists in the Canadian Armed Forces and becomes financially self-sufficient
• The child is emancipated through conduct that demonstrates full financial independence, such as working full-time and living independently at age 16 or 17

The paying parent bears the burden of proving voluntary withdrawal. Courts require clear evidence that the child chose to leave, was not pushed out, and has the means to support themselves. Simply moving in with a friend or romantic partner at age 17 does not automatically constitute voluntary withdrawal if the child remains financially dependent.

The Disability and Illness Exception

Child support in Ontario continues indefinitely when an adult child cannot become self-supporting due to illness or disability. Under Divorce Act s. 2(1)(b), a child of any age remains a "child of the marriage" if unable to withdraw from parental charge or obtain the necessaries of life by reason of illness or disability. There is no age ceiling for this exception. Ontario courts have ordered parents to pay child support for adult children in their 30s, 40s, and beyond when a permanent disability prevents self-sufficiency.

Qualifying conditions include physical disabilities that prevent employment, intellectual disabilities requiring ongoing support, serious mental health conditions that impair the ability to work, and chronic illnesses requiring continuous care. The disability must materially impair the child's ability to earn a living. A child with a manageable condition who can work part-time may receive reduced support rather than full support.

The amount of support for a disabled adult child takes into account provincial disability benefits such as the Ontario Disability Support Program (ODSP), which provides a maximum of $1,368 per month for a single person as of 2026. Courts may order parental support to supplement ODSP payments when the parent's income warrants it.

How to Terminate Child Support in Ontario: Step-by-Step Process

Terminating child support in Ontario requires either a signed written agreement between both parents or a Motion to Change filed with the court. The paying parent cannot simply stop making payments when the child turns 18, even if no exception applies. The filing fee for an application in the Superior Court of Justice is $214 as of March 2026, while the Ontario Court of Justice charges no filing fees for family matters. Verify current fees with your local court clerk.

Option 1: Written Agreement

Both parents sign a written agreement acknowledging that the child is no longer a dependent and that support should end. If child support was established by court order, the agreement alone does not stop FRO enforcement. The parents must either file the agreement with the court for a consent order or file a notice with FRO to withdraw enforcement.

Option 2: Motion to Change (Court Process)

When parents cannot agree, the paying parent files a Motion to Change using these required forms:

1. Complete Form 15 (Motion to Change) stating the grounds for termination
2. Complete Form 14A (Affidavit) with sworn evidence that the child is no longer a dependent
3. Complete Form 13 (Financial Statement) with current income documentation, including the last 3 years of tax returns and a recent pay stub
4. Complete Form 13A (Certificate of Financial Disclosure)
5. File all forms with the court that issued the original order
6. Serve the responding parent through special service by a person aged 18 or older who is not a party to the case
7. Complete Form 6B (Affidavit of Service) proving proper service
8. The responding parent has 30 calendar days to file a response, or 60 days if served outside Canada or the United States
9. Attend the case conference or hearing and present evidence of the changed circumstances

The court must be satisfied that a material change in circumstances has occurred since the original order was made. Turning 18 alone may qualify if the child is not in school and is self-supporting, but the paying parent must present evidence to establish this fact.

2025 Federal Child Support Table Updates

The 2025 Federal Child Support Tables took effect on October 1, 2025, replacing the 2017 tables that had been in use for 8 years. These updated tables affect when does child support end Ontario calculations because they change the monthly amounts payable. Under the new tables, a parent earning $100,000 annually pays $1,485 per month for one child and $2,396 per month for two children in Ontario.

Key changes in the 2025 Federal Child Support Tables include:

The 2025 tables do not automatically apply to existing child support orders. A parent seeking to adjust payments under the new tables must demonstrate a material change in circumstances. The table update itself, combined with a meaningful difference in the monthly amount, may constitute a material change. Courts evaluate this on a case-by-case basis.

Parents can look up their exact table amount using the federal government's online tool at justice.gc.ca. The calculation requires the paying parent's gross annual income before taxes and the number of children.

The Role of the Family Responsibility Office (FRO)

The Family Responsibility Office enforces all child support orders in Ontario and does not independently determine when child support should end. FRO continues collecting and distributing payments until it receives either a new court order terminating support or a written notice from both parties withdrawing enforcement. FRO enforces child support through wage garnishment, bank account seizure, federal payment interception (tax refunds, EI benefits), driver's license suspension, passport denial, reporting to credit bureaus, and in extreme cases, imprisonment for up to 180 days.

As of 2026, FRO manages over 190,000 active child support cases in Ontario. Arrears accumulate at the full ordered amount for every month the paying parent fails to pay, regardless of whether the child has turned 18. Interest does not accrue on child support arrears in Ontario, but the principal amount remains enforceable indefinitely. There is no limitation period for collecting child support arrears in Ontario.

The paying parent should never stop payments without legal authorization. Even if the child has clearly graduated, moved out, and started a career, the existing court order remains in force until formally changed. FRO will continue to enforce the original order and record arrears for every missed payment.

Shared and Split Parenting Time Arrangements

Child support calculations and termination rules interact with parenting time arrangements in Ontario. Under the Federal Child Support Guidelines, SOR/97-175, s. 9, when each parent has the child for at least 40% of the time (shared parenting time), the child support amount is calculated using a set-off formula rather than straight table amounts. This means both parents' incomes are considered, and the higher-income parent pays the difference between the two table amounts.

When child support ends in a shared parenting arrangement, both parents' obligations terminate simultaneously. The termination process is the same: either a written agreement or a Motion to Change. However, the analysis of whether the child remains a dependent applies equally regardless of the parenting time split.

For split parenting arrangements where each parent has primary parenting time with at least one child, child support is calculated separately for each child. Termination occurs on a per-child basis as each child ages out of eligibility. The parent must file a Motion to Change for each child or address all children in a single motion.

Frequently Asked Questions

Does child support automatically end at 18 in Ontario?

Child support does not automatically end at age 18 in Ontario. Under FLA s. 31(1), the obligation continues for children enrolled in full-time education. The paying parent must obtain a new court order or signed agreement to formally terminate support, even if the child is 18 and not in school. Stopping payments without legal authorization creates enforceable arrears through the Family Responsibility Office.

How long does child support last for a university student in Ontario?

Ontario courts typically order child support to continue through the completion of a first undergraduate degree or college diploma, with a practical ceiling around ages 22 to 25. Under Divorce Act s. 2(1)(b), full-time post-secondary enrollment qualifies as "other cause" keeping a child dependent. Courts rarely fund second degrees. The child must be making meaningful academic progress and remain financially dependent on the parents.

What does it cost to file a motion to terminate child support in Ontario?

Filing a Motion to Change in the Superior Court of Justice costs $214 for the application as of March 2026. The Ontario Court of Justice charges no filing fees for family matters. Additional costs may include $171 for an answer if the other parent contests, $33 for a witness summons, and $25 for certified document copies. Fee waivers are available for those who cannot afford court costs. Verify all fees with your local clerk.

Can I stop paying child support if my child drops out of school?

A child dropping out of post-secondary education may constitute a material change in circumstances justifying termination of child support in Ontario. However, the paying parent cannot unilaterally stop payments. The parent must either obtain a signed agreement from the other parent or file a Motion to Change (Form 15) with the court. Temporary breaks such as gap years or medical leaves do not necessarily end the obligation. Courts examine whether the withdrawal from school is permanent.

Does child support end if my child gets married?

Marriage terminates child support obligations in Ontario regardless of the child's age. Under FLA s. 31(1), the support obligation applies only to "unmarried" children. Once a child marries, the spouse assumes the primary support obligation. The paying parent should still obtain a formal order or agreement to stop FRO enforcement, but marriage is one of the clearest grounds for termination.

What happens to child support arrears when my child turns 18?

Child support arrears remain fully enforceable in Ontario even after the child turns 18 or otherwise ceases to be a dependent. There is no limitation period for collecting child support arrears in Ontario. The Family Responsibility Office will continue enforcement through wage garnishment, bank seizure, license suspension, and passport denial. Arrears can only be reduced or eliminated through a court order, and courts are reluctant to forgive arrears without compelling reasons such as fraud or a fundamental change in the paying parent's ability to pay.

Can child support be extended for a child with a disability in Ontario?

Child support continues indefinitely for a child with a disability who cannot become self-supporting. Under Divorce Act s. 2(1)(b), there is no age limit when illness or disability prevents a child from withdrawing from parental charge. Ontario courts have ordered support for disabled adult children well into their 30s and 40s. The amount may be adjusted to account for provincial benefits such as ODSP, which provides up to $1,368 per month for a single person in 2026.

How do the 2025 child support tables affect my existing order?

The 2025 Federal Child Support Tables, effective October 1, 2025, do not automatically change existing support orders. The income floor rose from $13,000 to $16,000 per year, meaning parents earning below $16,000 now have zero table obligation. For incomes between $16,000 and $45,000, the 2025 tables generally produce lower monthly amounts than the 2017 tables. A parent must file a Motion to Change and demonstrate that the table update creates a material change in the support amount to modify an existing order.

What is the difference between provincial and federal child support laws in Ontario?

The Family Law Act (Ontario) applies when parents were never married or are separated but not divorced. The Divorce Act (Federal) applies when married parents divorce. Both laws extend support past 18 for dependent children, but use different language. The FLA refers to children "enrolled in a full-time program of education." The Divorce Act uses "unable to withdraw from their charge" due to illness, disability, or "other cause." Both the Federal Child Support Guidelines (SOR/97-175) apply to calculate amounts in either case.

Can my child apply for child support directly in Ontario?

An adult child aged 18 or older can apply for child support directly against a parent in Ontario. Under FLA s. 33, a dependant may apply for a support order. The adult child must demonstrate continued dependency, typically through full-time enrollment in a recognized educational program or an inability to support themselves due to illness or disability. Courts require the child to provide full financial disclosure, including income from employment, scholarships, student loans, and RESP withdrawals.