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Child Support When an Adult Child Cuts Off Contact With a Parent

If your adult student child refuses contact, does support end? Learn how Ontario courts look at dependence, estrangement and proof, and what to do next.

Family Law4 min readTSLBy the Treadstone Law Team · OntarioUpdated October 28, 2026
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Key takeaways
  • An adult child can still qualify for support if they cannot withdraw from parental charge because of illness, disability or other cause, and school can be one such cause.
  • The parent claiming support for an adult child must prove the child remains under parental charge.
  • Justice Canada's review mentions stepparent cases where estrangement did not end a support obligation, but those cases do not settle what happens with an adult student.
  • Keep paying until a court order or written FRO confirmation says you can stop.

Your son or daughter is over 18, studying at college or university, and no longer speaks to you. You are still paying child support, and it feels unfair to fund a relationship that has ended. You may be asking whether the estrangement lets you stop.

The law does not treat contact and support as one package. This article explains how courts generally approach adult children, what estrangement may and may not change, and what steps protect you while you sort it out.

When an adult child can still receive support

Under the Divorce Act, a 'child of the marriage' can include an adult child who cannot withdraw from parental charge or obtain the necessaries of life because of illness, disability or other cause. Courts have read 'other cause' to include secondary and post-secondary studies, and support has often continued until a post-secondary degree was completed. Courts decide case by case whether older children qualify.

There is no single definition of 'charge'. The idea considers the child's financial dependency and the parents' control. How estrangement fits into that idea depends on the facts, so it is worth confirming with a lawyer.

How courts have treated estrangement

Whether estrangement ends support depends on the facts, and a lawyer can tell you how a court might see yours. Some useful guidance comes from decisions about stepparents and younger children. In one, post-separation estrangement between a paying stepparent and stepchildren was held not relevant to child support. In another, children were still entitled to support even though they disliked their stepfather. The Supreme Court of Canada has also held that a stepparent standing in the place of a parent cannot unilaterally end the obligation.

Those cases are not about adult students in Ontario, so they do not settle your situation.

Who has to prove what

A parent claiming support for an adult child must prove the child remains under parental charge. University enrolment can help meet that onus. If you are the payor asking the court to change an existing order, you must prove a material change.

Turning 18, or attending university, does not by itself prove a material change where the original order already contemplated support past 18 and university. A future motion should rest on a proper evidentiary foundation, not only on non-enrolment in full-time studies.

QuestionGeneral approach
Who must show an adult child still qualifies?The parent claiming support
Who must show a material change on a motion to change?The party seeking the change
Does turning 18 alone end the order?Not by itself where the order already contemplated support past 18 and university
Does estrangement alone end the obligation?Courts in the stepparent cases did not treat it that way, but facts vary

How much support is set for an adult child

For a child at or over the age of majority, the court first applies the table amount as if the child were a minor. It departs from that amount only if it finds that approach inappropriate. In that case it sets what it considers appropriate, having regard to the child's condition, means, needs and circumstances and each spouse's ability to contribute.

This means the child's own income, savings, scholarships and other resources may become part of the discussion, which can lead to a different amount rather than an end to support.

If you were never married, the Ontario child support rules under the Family Law Act may apply instead. The section numbers and wording can differ, so confirm this with a lawyer.

What to do next

Only a court can change the amount of support, and FRO cannot change what you pay. FRO tells payors to keep paying until it says in writing that they can stop. Support ends through a court order, a terminating event both parties agree on, or a written agreement between payor and recipient.

Frequently asked questions

Can I stop paying because my adult child won't speak to me?

Not on your own. How estrangement affects support depends on your situation, so it is worth confirming with a lawyer. FRO tells payors to keep paying until it says in writing that they can stop. A court decides based on the evidence.

Who has to prove the adult child is still dependent?

The parent claiming support must prove the child remains under parental charge, and university enrolment can help meet that onus. If you ask to change an order, you must prove a material change.

Is a child over 18 in school entitled to support?

Not automatically. Courts have read 'other cause' to include post-secondary studies and support has often continued until a degree was completed, but they decide case by case.

Will the amount be the same as for a minor child?

The court first applies the table amount as if the child were a minor. It departs only if that is inappropriate, looking at the child's means and needs and each parent's ability to contribute.

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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