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Find a Lawyer » Canada Legal Guides » Ontario Legal Guides » Family Law & Divorce Ontario » Child Custody & Support Ontario » How Long Must You Pay Child Support Under Ontario Law?

How Long Must You Pay Child Support Under Ontario Law?

26 Mar 2026 5 min read No comments Child Custody & Support Ontario
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In Ontario, child support does not automatically end on the child’s 18th birthday. You generally must continue paying support if your adult child is enrolled in a full-time post-secondary education program, has a severe disability, or remains financially dependent on their parents for the necessities of life.

One of the most persistent myths in family law is the belief that child support vanishes the exact moment a child cuts their 18th birthday cake. Many parents in Ontario simply stop paying on that date, only to have their wages severely garnished by the government months later. 📝

Under both the federal Divorce Act and Ontario’s Family Law Act, child support is considered the absolute right of the child. The law recognizes that a teenager finishing high school or starting university is rarely financially independent.

This guide will explain how to determine when a child is no longer a “child of the marriage,” how post-secondary expenses are calculated, and the proper legal steps to formally stop your payments through the Family Responsibility Office (FRO). We will also outline when consulting a local family law firm is necessary to adjust your obligations safely.

Step-by-Step Process in Ontario

Whether your support order was finalized in Hamilton, Brampton, or London, the Family Responsibility Office (FRO) enforces it strictly across the province. The FRO cannot change or cancel your support order on their own; they simply collect the money until a judge tells them to stop. 📍

To lawfully reduce or terminate your payments, you must take formal legal action. Stopping payments unilaterally will result in suspended driver’s licences and frozen bank accounts.

Step 1: Check Your Original Agreement or Court Order

First, read your original Separation Agreement or family court order. Some highly detailed agreements contain an explicit “terminating event” clause. ❗

For example, the order might say, “Support shall terminate when the child turns 18, unless they are enrolled in full-time post-secondary education, at which point support terminates upon graduation or their 22nd birthday.” If your order has a clear end date, follow those specific instructions.

Step 2: Assess the Child’s Dependency Status

If your order is silent on an end date, you must determine if the child is still legally dependent. A child over 18 is usually still entitled to support if they are attending college or university full-time, or if they have a severe illness or disability preventing them from working.

If the 19-year-old child has graduated high school, is not attending post-secondary school, and is working full-time (or actively seeking full-time work), they are generally no longer considered a dependent, and support can usually end.

Step 3: Negotiate with Your Ex-Partner

If you believe the child is no longer dependent, or if they are in university and the support amount needs to be adjusted (often under Section 3(2) of the Child Support Guidelines), contact your ex-partner. 💪

If you both agree that support should end, you can draft a “Consent Motion to Change.” This is a straightforward legal document that both parents sign, agreeing to terminate the support obligation. This is the cheapest and fastest way to resolve the issue.

Step 4: File a Form 15 (Motion to Change) and Notify FRO

If your ex-partner refuses to agree, you must file a Form 15 (Motion to Change) with the Superior Court of Justice or the Ontario Court of Justice.

A judge will review the child’s academic records or employment status and make a legally binding decision. Once the judge signs the new order terminating the support, you must immediately fax or mail a copy of that order to the Family Responsibility Office so they stop garnishing your paycheque.

How Much Does it Cost in Ontario?

Changing a child support order can be very inexpensive if both parents cooperate. However, if one parent insists the 24-year-old child still needs full support for a third university degree, litigation costs can climb. 💰

Here is a breakdown of typical costs associated with changing or ending child support:

Action / Service TypeEstimated Cost (CAD)Who Pays?
Consent Motion to Change$0 (No court filing fee)N/A
Contested Motion to Change$160 (Court Filing Fee)The Applicant
Lawyer (Drafting Consent Order)$1,000 – $2,500+ Flat FeeOften split 50/50
Lawyer (Litigating Contested Case)$5,000 – $15,000+Each parent pays their own

It is important to note that the Family Responsibility Office (FRO) does not charge user fees to collect or distribute standard child support payments, as the provincial government fully funds their operations.

How Long Does the Process Take?

If both parents agree that the child is independent, filing a Consent Motion to Change can be processed by a judge very quickly, often within 4 to 8 weeks. ⏱

If you must fight the issue in court, your Form 15 will enter the provincial family court backlog. Reaching a final decision through a contested motion typically takes 6 to 12 months.

While you wait for the court date, you are legally required to continue paying the original child support amount. If the judge eventually agrees that support should have ended months ago, they can order your ex-partner to reimburse you for the overpayment.

Frequently Asked Questions (FAQ)

What happens if my child takes a “gap year” after high school?

If a child takes a gap year to work and save money, they are generally considered independent for that year, and standard support may temporarily pause. However, if they return to full-time college the following year, the child support obligation will usually resume.

Does child support cover a second university degree?

It depends heavily on the family’s standard of living and the child’s career path. Judges expect parents to contribute to a first undergraduate degree or diploma. Ordering support for a Master’s degree, law school, or a second Bachelor’s is less common but still possible in high-income families.

How is support calculated for a university student living away from home?

When a child moves away for school, the standard “Table Amount” often changes. Under Section 3(2) of the Guidelines, judges typically order parents to contribute proportionally to the actual costs of tuition and residence, while paying a reduced base support amount for the months the child lives back at home during the summer.

Can I pay child support directly to my 19-year-old?

If both parents agree in writing, or if a judge orders it, child support can sometimes be paid directly to an adult child attending post-secondary school to help them manage their own budget. However, you cannot unilaterally decide to bypass your ex-partner and pay the child directly without a formal agreement.

Should I hire a law firm to end my child support?

If your ex-partner is cooperative, you may only need a lawyer to quickly draft the consent paperwork. However, if your ex-partner is demanding thousands of dollars for unnecessary college expenses or hiding the fact that the child dropped out, a local family law firm is crucial to file a contested Motion to Change and stop the unfair payments.

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