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№ 77 Family Law

Can a Court Impute Income for Child Support in Alberta?

Learn how Alberta courts set income for child support, and when a judge can impute income if a parent quits, under-reports or pays a low company salary.

Family Law4 min readTSLBy the Treadstone Law Team · AlbertaUpdated November 1, 2026
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Key takeaways
  • Child support starts from the paying parent's income, taken from the Total income line of the T1 General tax return and adjusted under Schedule III.
  • A court may impute income for intentional under-employment or unemployment, or for unreasonable deductions of expenses.
  • Income documents must be disclosed, and a parent who does not provide them risks a court imputing income.

You may suspect that the other parent has quit a job, cut back hours, or arranged their company pay to look small. Because child support depends heavily on the payer's income, that can feel unfair and worrying.

The law gives courts tools for these situations. This article explains how income is normally set, when a judge can look past the numbers on paper, and what disclosure rules help you find out what is really going on.

This article covers the law of Alberta.

How income is normally set

Table child support is driven by the paying parent's annual income, the number of children, and the payer's province. Income is generally taken from the Total income line of the T1 General tax form, adjusted under Schedule III.

Parents can also agree in writing on what the income is, and the court may accept the agreed figure if it is reasonable. An agreement is not automatic, so a figure that looks badly out of line may still be questioned.

The same approach applies whether you are divorcing or not. Divorcing spouses are under the Divorce Act, and the Federal Child Support Guidelines apply unless both are habitually resident in a province designated by order. Unmarried, separated-but-not-divorced, and adult interdependent partners proceed under Alberta's Family Law Act and the Alberta Child Support Guidelines. Those Alberta guidelines adopt the Federal Child Support Guidelines, so the table amounts are the same.

When a court can impute income

To impute income means the court treats a parent as earning a certain amount, even if their tax return shows less. The court may impute the income it considers appropriate, for example for intentional under-employment or unemployment, or for unreasonable deductions of expenses.

Situations where parents commonly raise this include:

Whether a particular choice counts as intentional, and what figure is appropriate, depends on the facts. A lawyer can help you judge how strong your situation is.

Fluctuating income and company pay

If a parent's income this year would not fairly reflect their real income, the court may look at their income over the last three years. Fluctuating income and one-time amounts are examples.

For a shareholder, director or officer of a corporation, the court may attribute all or part of the corporation's pre-tax income to that parent where the salary figure does not fairly reflect the money available for support.

SituationTool the court may use
Income goes up and down, or includes one-time amountsLook at the last three years
Owner's salary does not fairly reflect the money available for supportCourt may attribute all or part of the corporation's pre-tax income
Intentional under-employment or unreasonable expense deductionsImpute income

Disclosure: how you find out

When someone applies for child support, the applicant must include every personal income tax return filed by the other spouse for each of the three most recent taxation years, plus every notice of assessment and reassessment for those years. If the spouse is an employee, pay information is included too.

A respondent who is served with an application must provide the same income documents within 30 days if in Canada or the United States, or 60 days if elsewhere, unless the court sets another deadline.

If a spouse does not comply, the other spouse may apply for a hearing or judgment, or for an order requiring the documents. The court may also impute income.

After the order, and what to do next

Disclosure continues once an order is made. While the child is a child under the Guidelines, a spouse must provide updated income documents on written request, not more than once a year, within 30 days (Canada or the United States) or 60 days (elsewhere).

If you think income is being understated, practical steps include:

Frequently asked questions

Can a court impute income if a parent quits their job on purpose?

It can. A court may impute the income it considers appropriate for intentional under-employment or unemployment. Whether a particular decision qualifies depends on the facts.

What if the other parent will not provide tax documents?

You may apply for a hearing or judgment, or for an order requiring the documents, and the court may impute income. A respondent served with an application must provide the income documents within 30 days if in Canada or the United States, or 60 days if elsewhere, unless the court sets another deadline.

Does this apply if we were never married?

Yes. Unmarried and separated-but-not-divorced parents proceed under Alberta's Family Law Act and the Alberta Child Support Guidelines, which adopt the Federal Child Support Guidelines.

What if a parent owns a company and pays themselves little?

The court may attribute all or part of the corporation's pre-tax income to a shareholder, director or officer where the salary does not fairly reflect the money available for support. How much depends on the facts, so an accountant or lawyer can help.

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. Alberta 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 Alberta. Reach us at 1-844-900-1070 or send our Team a message.

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