By Navdeep Dhindsa – Brampton Child Custody Lawyer

Child support is one of the most common and important questions parents ask during separation or divorce. As a Brampton Child Custody Lawyer, I often hear: “When does child support actually stop?”

The answer depends on several factors under Canadian law, particularly the federal Divorce Act and Ontario’s Family Law Act. In this blog, I’ll break down how child support works in Canada and when it legally comes to an end.

What Is Child Support Under Canadian Law?

Under the Divorce Act and the Family Law Act, child support is a parent’s legal obligation to support their child financially. It is the right of the child rather than of either parent.

Under the Divorce Act and the Family Law Act, child support is the legal obligation of a parent to financially support their child after separation or divorce.

Support payments are typically calculated using the Federal Child Support Guidelines, which consider:

  • The paying parent’s income
  • The number of children
  • The parenting arrangement
  • Special or extraordinary expenses (Section 7 expenses)

Child support is a right of the child, not the parent receiving the payments. That’s an important distinction many people overlook.

Does Child Support End at the Age of Majority?

In Ontario and most Canadian provinces, child support usually continues until the child reaches the age of majority. Reaching that age does not by itself terminate the obligation.

In Ontario and most Canadian provinces, child support usually continues until the child reaches the age of majority, which is 18 years old in Ontario.

However, turning 18 does not automatically mean child support ends.

When Does Child Support Continue Past 18?

Support may continue past 18 where the child remains in full-time education, or where illness, disability or another cause means the child cannot withdraw from parental charge.

Under Canadian law, support may continue if the child is:

1. Enrolled in Post-Secondary Education

If a child is attending college or university full-time, support can continue beyond age 18. Courts look at:

  • Whether the child is seriously pursuing education
  • The child’s academic performance
  • Whether the child contributes financially (e.g., part-time work)

2. Living with a Disability or Illness

If a child is unable to become financially independent due to physical or mental disability, support may continue indefinitely.

3. Still Dependent and Not Withdrawn from Parental Care

If a child has not withdrawn from parental control and is still dependent (for example, finishing high school after turning 18), support may continue.

As a Brampton Child Custody Lawyer, I often advise parents that child support is tied more to dependency than strictly to age.

When Does Child Support Actually End?

Child support typically ends when the child withdraws from parental charge, completes their education, becomes self-supporting, or a court order or agreement specifies an end date that has been reached.

Child support typically ends when:

  • The child reaches 18 and is financially independent
  • The child completes post-secondary education and becomes self-supporting
  • The child marries or enters into a common-law relationship and becomes independent
  • The child permanently withdraws from parental control

Sometimes a separation agreement or court order clearly states an end date. In other cases, a court application may be required to formally terminate support.

Do Child Support Payments Stop Automatically at 18?

No. Child support does not automatically stop when a child turns 18. The existing order or agreement remains enforceable until it is varied or terminated through the proper process.

No. Child support does not automatically stop when a child turns 18.

If payments are enforced through Ontario’s Family Responsibility Office, the paying parent must obtain a court order or agreement confirming termination. Otherwise, enforcement may continue.

This is where legal guidance becomes crucial.

Can Child Support Be Changed Before It Ends?

Yes. Support can be varied where there is a material change in circumstances, such as a change in either parent’s income, a change in parenting time, or a change in the child’s needs.

Yes. Support can be varied if there is a material change in circumstances, such as:

  • A significant income change
  • A child no longer living with the recipient parent
  • A change in parenting time

A motion to change may need to be filed with the court.

Frequently asked questions

1. I’m paying child support. Can I just stop when my child turns 18?

No. You should never stop payments without a formal agreement or court order. Doing so can result in arrears and enforcement action.

2. My child is 20 and in university. Do I still have to pay?

Possibly, yes. If your child is enrolled full-time and remains dependent, support may continue.

3. What if my child drops out of school?

If your child withdraws from school and becomes financially independent, you may have grounds to terminate support. Legal advice is strongly recommended before taking action.

4. Does shared parenting affect when support ends?

Shared parenting affects the amount of support but not necessarily the duration. Dependency remains the key factor.

5. Do I need to go to court to end child support?

Often, yes—especially if payments are being enforced through the Family Responsibility Office or if the other parent disagrees.

What Should You Take Away About When Does Child Support End?

Child support does not end automatically at a specific age in Canada. The key question courts ask is whether the child remains dependent. Every family situation is unique, and small details can significantly affect your legal obligations.

If you are unsure whether child support should continue or end in your case, it is important to seek professional legal guidance. As a Brampton Child Custody Lawyer, I help parents understand their rights and responsibilities under Canadian law and work toward practical, fair solutions.

For trusted legal advice regarding child support matters, contact Dhindsa Law today.

Can child support be changed or ended early?

Support is not fixed for life. It can be varied on a material change in circumstances — a significant change in either parent's income, a change in the parenting arrangement, or the child's circumstances changing.

What you cannot do is stop paying unilaterally. Arrears accumulate, the Family Responsibility Office enforces collection, and a court asked to vary support later will take the non-payment into account. If the basis for support has ended, apply to change the order or the agreement.

What if support is set out in an agreement rather than an order?

The same principle applies, but the route differs. A Separation agreement can be varied by a new written agreement, or a court can be asked to change it. Section 56(1) of the Family Law Act also allows a court to disregard a provision about a child where doing so is in the child's best interests — you cannot contract out of that.

Where do you get this right?

The two questions that cause most disputes are whether an adult child is genuinely still dependent, and what the paying parent's income is. Neither is answered by the calendar. See our pages on Child custody and parenting and Spousal support, which frequently runs alongside child support and is calculated differently.