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

Imputed Income and Child Support in Ontario: When a Judge Assumes More

Learn when an Ontario court may impute income for child support, including under-employment, business write-offs, and the exceptions that apply.

Family Law4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 13, 2026
← All articles
Key takeaways
  • A court may impute income, meaning treat a parent as earning more than they report, where that parent is intentionally under-employed or unemployed or unreasonably deducts expenses.
  • Income is not imputed where under-employment is required by a child's needs or by the parent's reasonable educational or health needs.
  • Child support is built on income, so full and honest financial disclosure is the best protection whether you are paying or receiving.

Child support under the federal tables depends mainly on the paying parent's income. That raises an obvious question: what if a parent is out of work, or earning much less than they could, and it looks deliberate? Or what if you are that parent, and your circumstances have a good explanation?

This article explains in plain language when a court may impute income, what it looks at, and the limits on that power. The rules below come from the federal Child Support Guidelines. Unmarried parents are dealt with under Ontario law, which generally follows the same approach, so a lawyer can confirm how it applies to you.

What imputing income means

Income for child support is normally a parent's annual income, which starts from the Total income line on the T1 General tax return and is then adjusted. Imputing income means a court uses a higher figure than the one on paper because it finds the real earning capacity or real income is greater.

The table amount depends on the paying parent's annual income, the number of children and the province where the paying parent lives. So even a modest change to the income figure can change the monthly amount.

When a court may impute income

The Guidelines allow a court to impute income on several grounds. Two of the most common are where a parent is intentionally under-employed or unemployed, and where a parent unreasonably deducts expenses from income, such as business write-offs.

SituationWhat a court may do
Parent intentionally under-employed or unemployedImpute income
Self-employed parent with unreasonable write-offsImpute income
Shareholder, director or officer of a corporationCount all or part of the corporation's pre-tax income, or an amount for services provided, as the parent's income
Corporation pays family members or others not at arm's lengthAdd the pay back to pre-tax income unless shown to be reasonable
Income that varies, such as seasonal workLook at income over the last three years

For corporations, this can capture earnings kept inside the company rather than paid out to the owner.

Exceptions: when income should not be imputed

A court does not impute income for under-employment or unemployment where it is required by the needs of a child, or by the parent's reasonable educational or health needs. For example, a parent who has reduced work hours because of a real health condition is in a different position from a parent who simply chooses not to work.

Whether a situation fits the exception depends on the facts and the evidence. Medical records, school enrolment and job-search records often matter, and a lawyer can help you decide what to gather.

Disclosure and proof of income

A parent whose income is in issue must provide personal income tax returns for each of the three most recent tax years. A self-employed parent must also provide three years of financial statements and a breakdown of payments to people not at arm's length.

If you were unemployed in the last three years, Ontario guidance says you must also file a Record of Employment or other proof, and a statement of any benefits still owed, such as severance. On written request, no more than once a year, the paying parent must provide updated income documents within 30 days, or 60 days if living outside Canada and the U.S..

Gaps in disclosure make it harder to explain your situation. A parent who hides or delays income information gives the other side and the court more reason to doubt the figures.

What to do next

In court, Ontario uses Form 8 to set up child support, Form 15 to ask for a change without the other parent's consent, and Form 15D where both consent, along with a Form 13 financial statement and a Form 13A certificate of financial disclosure. The online Child Support Service is not available where the order involved imputed income, or where the payor is self-employed or a partner or majority shareholder in a business.

Frequently asked questions

Can a judge assume I earn more if I lose my job?

Not automatically. Imputing income applies where a parent is intentionally under-employed or unemployed. A genuine job loss is different, and a drop in the payor's income after a job loss can be a change of circumstances for variation.

Can income be imputed if I am in school or have health problems?

Income is not imputed where the under-employment is required by a child's needs or by your reasonable educational or health needs. Whether your situation qualifies depends on the evidence.

Can a business owner be treated as earning more than their salary?

Yes, it can happen. A court may count all or part of a corporation's pre-tax income as a shareholder, director or officer's income. It may also impute income where business expenses are unreasonably deducted.

Can I ask for a change if income was imputed unfairly?

A court may vary a child support order after it is satisfied that a change of circumstances has occurred since the order was made or last varied. A lawyer can tell you whether your facts fit.

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 →