TREADSTONE LAW · ONTARIO · DIGITAL LEGAL SERVICES · EST. MMXXI ·TSL
Licensed by the Law Society of OntarioFlat fees published upfrontWe reply to messages within 1 business daySign in
Home/Articles/Family Law
№ 77 Family Law

Undue Hardship and Child Support in Ontario: Can the Amount Be Lowered?

Find out what undue hardship means for child support in Ontario, which causes may count, why the bar is high, and what to do if you are struggling.

Family Law4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 6, 2026
← All articles
Key takeaways
  • A court may order a different amount of child support if a spouse would otherwise suffer undue hardship.
  • A hardship claim must be denied if the claimant's household would have a higher standard of living than the other household.
  • A drop in income can support a change to an order, but the amount stays in place and arrears keep building until a judge changes it.

If child support is more than you can manage, it is natural to wonder whether the law allows a reduction. There is a rule for it, called undue hardship, but it is an exception and the bar is high.

This article explains what undue hardship means, what may count as a cause, when a claim fails, and what other options may be more realistic. It describes the federal rules under the Divorce Act. If you were never married, Ontario's own legislation applies, and a lawyer can confirm how it works for you.

Why the table amount is the starting point

The Federal Child Support Guidelines aim to set a fair standard of support for children and to reduce conflict between spouses. The basic amount is the table amount for the number of children plus any special or extraordinary expenses. The table amount depends on the payor's annual income, the number of children and the province where the payor lives.

Courts do not reduce that amount just because it is difficult to pay. Undue hardship is one of several narrow exceptions.

What undue hardship means

A court may order a different amount if a spouse would otherwise suffer undue hardship. The Guidelines list possible causes:

The word unusually matters. Ordinary debts and everyday living costs are unlikely to be enough on their own. Whether your circumstances qualify depends on the facts, and a lawyer can help you assess them.

Why the bar is high

Even if one of the causes applies, the claim must be denied if the household of the spouse claiming hardship would have a higher standard of living than the other spouse's household. The comparison is between the two households' standards of living, not just between the two incomes.

Because hardship changes the amount away from the normal table figure, you should expect to need clear financial evidence. In Ontario, court financial disclosure involves a Form 13 financial statement and a Form 13A certificate of financial disclosure, with three years of tax returns, notices of assessment and proof of current income. Gathering complete records early makes it easier to show your real situation.

Other routes that may fit better

Many parents who feel squeezed are not really in an undue hardship situation, but they may have another option.

SituationPossible route
Your income dropped, for example after a job lossAsk for a variation based on a change of circumstances
The order or agreement has special provisions that benefit the childA court may depart from the Guidelines amount if the Guidelines amount would be inequitable because of them, and it must record its reasons
You and the other parent agree on a different amountA court may award a different amount with both spouses' consent if satisfied reasonable arrangements have been made for the child's support
Each parent has at least 40% of parenting timeSupport is set by considering both table amounts, the increased costs of shared parenting and each spouse's circumstances

Parents cannot simply contract out of child support. The court must be satisfied that the arrangements are reasonable. A payor with an income below $12,000 does not owe table child support under the federal tables.

What to do next

Do not stop paying and wait. The Family Responsibility Office cannot change the amount owed, only a judge can, and arrears keep building under the existing order until it is changed. A payor who loses their job should contact the Family Responsibility Office immediately.

Frequently asked questions

What counts as undue hardship for child support?

The Guidelines mention unusually high debts reasonably incurred to support the family, unusually high costs of exercising parenting time, and legal duties to support other children or persons. Whether your situation qualifies depends on the facts.

Can I claim hardship if I earn less than the other parent?

Not necessarily. A hardship claim must be denied if the household of the spouse claiming hardship would have a higher standard of living than the other spouse's household. The comparison is between households, not just incomes.

Will the court lower my support if I lost my job?

A drop in income after a job loss is an example of a change in circumstances that can support a variation. A court may vary an order if it is satisfied that a change of circumstances has occurred since the order was made or last varied.

Can the Family Responsibility Office reduce what I owe?

No. The Family Responsibility Office cannot change the amount owed, only a judge can, and arrears keep building under the existing order until it is changed.

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.

This is a family law question

Start a file online — flat, published fees, reviewed by a licensed lawyer before a dollar is owed.

ContactStart a File →