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Child Support for Adult Children in School in New Brunswick

Does child support continue when a child turns 19 or starts university or college? See how New Brunswick treats school costs and what to confirm.

Family Law4 min readTSLBy the Treadstone Law Team · New BrunswickUpdated November 6, 2026
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Key takeaways
  • The Federal Child Support Guidelines let the court add post-secondary education costs to the table amount as a special or extraordinary expense.
  • Whether support continues for a child past high school depends on the facts and the wording of your order or agreement, so check both before assuming it ends.
  • Spouses can agree in writing on income if the court finds the agreement reasonable, and the court can look at income over three years if that is fairer.

Your child has turned 19, finished high school, or is heading to university or college. Whether child support stops, continues or changes is one of the most common worries for separated parents.

There is no single date that works for everyone. This article explains the rules we can point to, such as how school costs are treated, and what to confirm in your own order or agreement.

This article covers the law of New Brunswick.

Why there is no simple cut-off date

People often assume support ends on a birthday. Whether it does depends on the wording of your own order or agreement and on your family's circumstances, so it is worth confirming with a lawyer before you rely on any date.

The exact age rules and how they apply to your family are worth confirming with a lawyer. The wording of your own order or agreement is the best place to start, because many documents say when support ends or what must happen first.

How school costs are treated

The Federal Child Support Guidelines allow the court to add special or extraordinary expenses to the table amount. These include child care, the child's share of medical and dental insurance premiums, and post-secondary education.

The table amount itself is based on the paying parent's province of residence and income and the number of children. Post-secondary costs, such as tuition, are a separate question and are decided on the facts.

Income and the amount going forward

Annual income is determined using the Total income line of the T1 General tax return, adjusted under Schedule III. The court can look at the last three years if that is not the fairest measure. Spouses can agree in writing on income if the court finds the agreement reasonable.

If the child lives away at school part of the year, the parenting arrangement may look different. Where each parent has the child at least 40% of the time over a year, the court must consider the table amounts for each parent, increased shared-parenting costs and each parent's circumstances. It is not an automatic set-off.

The court can depart from table amounts in limited cases to avoid undue hardship. A claim must be denied if the claiming household would have a higher standard of living than the other.

Agreements about school and support

Many separated parents deal with school costs in a separation agreement. A domestic contract, including a separation agreement, must be in writing, signed by the parties to be bound, and witnessed. The Court may set aside a provision for support, or a waiver of the right to support, in an agreement where it results in unconscionable circumstances.

Independent legal advice matters before you sign. The court may disregard a domestic contract provision where a spouse signed without independent legal advice and applying it would be inequitable. Clear wording about when support ends, and how school costs are shared, can prevent disputes later.

What to do next

Because the answer depends on your family's circumstances and the wording of your documents, a short review with a lawyer can save you from a costly assumption.

Frequently asked questions

Does child support automatically stop when my child turns 19?

How this applies depends on the wording of your order or agreement and on your family's circumstances, so it is worth confirming with a lawyer. The table amount is based on the number of children and the paying parent's province of residence and income. Check your documents and confirm with a lawyer before changing any payments.

Can university tuition be added to child support?

The Guidelines let the court add special or extraordinary expenses to the table amount, and post-secondary education is one of the listed examples. Whether and how much is added depends on the facts.

Can we agree on income without going to court?

Spouses can agree in writing on income, if the court finds the agreement reasonable. Putting the agreement in a signed, witnessed domestic contract is worth discussing with a lawyer.

Does shared time change the amount?

It can. Where each parent has the child for at least 40% of the time over the year, the court must consider both table amounts and the increased costs of shared parenting, and it is not an automatic set-off.

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. New Brunswick 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 lawyer who practises in New Brunswick. Reach us at 1-844-900-1070 or send our Team a message.

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