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Undue Hardship Test: Which Debts and Costs Qualify in Ontario

Learn which debts, access costs and support duties can support an undue hardship claim on child support in Ontario, and how households are compared.

Family Law4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 1, 2026
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Key takeaways
  • Section 10 of the Federal Child Support Guidelines lets a court order a different amount than the Guidelines amount if you or the child would otherwise suffer undue hardship.
  • The Guidelines list circumstances that can support a hardship claim, such as unusually high debts, unusually high costs of exercising parenting time, or other legal support duties.
  • Even if hardship is shown, the claim must be denied if the claimant's household would have a higher standard of living than the other household.

Child support is normally set using the Guidelines amount. But some people are carrying heavy debts, paying a lot to see their children, or supporting other people, and the standard amount feels impossible or unfair.

The law has a narrow safety valve for these situations called undue hardship. This article explains which circumstances qualify, how the court compares the two households, and what a hardship order can look like.

What undue hardship means

Under section 10(1) of the Federal Child Support Guidelines, either spouse may ask the court to award child support in an amount different from the Guidelines amount if the spouse or a child would otherwise suffer undue hardship.

Notice that either side can ask. A payor can claim hardship to ask for less, and a recipient can claim it as well. Notice also the word "undue". Everyone has tight budgets after separation. Hardship has to go beyond the ordinary strain of running two households, and the Guidelines list specific circumstances, such as unusually high debts, unusually high parenting time costs or other legal support duties.

The circumstances that can qualify

Section 10(2) sets out the circumstances a court may consider. They are not a general invitation to argue that money is short.

CircumstanceIn plain words
Section 10(2)(a)Unusually high debts that were reasonably incurred to support the spouses and children before separation, or to earn a living
Section 10(2)(b)Unusually high expenses for exercising parenting time with a child
Section 10(2)(c)A legal duty under a judgment, order or written separation agreement to support any person
Section 10(2)(d)A legal duty to support another child who is not a child of the marriage
Section 10(2)(e)A legal duty to support anyone who cannot obtain the necessaries of life because of illness or disability

Two words recur in the debt category: "unusually" and "reasonably". Debt that was taken on for the family or for earning a living may qualify if it is unusually high. Ordinary spending or debt that was not reasonably incurred is a harder fit.

Examples of how these play out

These are general illustrations, not predictions. Whether a situation qualifies depends on the facts and the evidence.

The household comparison

Proving a listed circumstance is only the first step. Section 10(3) requires the court to deny the claim if the claimant's household would have a higher standard of living than the other spouse's household after child support is set.

To compare the households, the court may use the test in Schedule II of the Guidelines. The comparison is about how well off each household is, so the details of both households matter. A lawyer can explain how the Schedule II calculation would apply to your numbers.

Time limits and written reasons

A hardship order does not have to be permanent. The court may set a reasonable time for the hardship-causing obligation to be satisfied, and set the amount payable after that time. For example, a debt that will be paid off in a defined period may lead to a lower amount for now and a return toward the Guidelines amount later.

If the court awards a different amount, it must record its reasons for doing so. That makes it important to present clear evidence, because the decision has to explain itself.

What to do next

Frequently asked questions

Is having a lot of debt enough for undue hardship?

Not by itself. The debt has to be unusually high and reasonably incurred to support the spouses and children before separation, or to earn a living. Even then, the household comparison can still defeat the claim.

Can a recipient claim undue hardship?

Yes. Section 10(1) says either spouse may ask the court for a different amount if the spouse or child would otherwise suffer undue hardship.

Is a hardship reduction permanent?

It does not have to be. The court may set a reasonable time for the obligation to be satisfied and the amount payable after that time.

What if my household is better off than the other one?

The court must deny the claim if the claimant's household would have a higher standard of living than the other spouse's household after child support is set. The court may use the Schedule II test to compare them.

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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