THE BASICS

Income Determination

by Julie Stanchieri on Nov 25 2025

Simple Income Determination

Even if you’ve never been through a family law dispute before, you’ve probably heard of child support or spousal support (also known as “alimony”). To determine what someone will owe for support, we must first determine that spouse’s income. This is often easier said than done. For some payors, it could be a straightforward exercise. We simply refer to gross “Total income” on their tax return.[1] If a payor is an employee with an arms’ length employer, and there is no opportunity to reduce or defer income, or write off unnecessary expenses, it can be very quick and easy to determine that person’s income by looking at their tax return.

Income Determination is Not Always Straightforward

Many lengthy volumes can be written about problems that arise if the tax return isn’t a fair representation of a payor’s income. In many cases, it’s a major source of dispute. The legislation we turn to for income determination is the Federal Child Support Guidelines. Payors should know that even if both spouses agree on an amount of income, it’s possible that a Court will not accept that level of income for child support purposes if it can’t be supported by documents. This is because child support is the right of the child, not the recipient parent.

Self-Employed Payors

Disputes tend to arise more frequently with self-employed payors. If a payor is a shareholder, director or office of a corporation, the Court doesn’t have to accept that person’s declared income on their tax return as the amount that should be used for support purposes. It’s possible instead for a Court to look at the pre-tax corporate income and attribute some or all of it to the payor.[2]

Imputation of Income

It’s also possible for a Court to determine what amount of income should be “imputed” to the payor based on their experience, training and skill level. If a payor is intentionally under employed, income will be imputed. A Court may adjust income if the payor lives in a foreign jurisdiction with a lower rate of income tax. A further very common example of when income is imputed, is when a payor unreasonably deducts business expenses when those expenses are actually personal. Sometimes, payors can even be imputed income if they fail to provide reasonable disclosure. There are many other examples of when a court may impute income to a payor.

Financial Disclosure

Documents that are commonly expected to be produced in a family law dispute can include: personal and corporate income tax returns for the last 3 years and Notices of Assessment, as well as corporate financial statements. Depending on the circumstances and complexity of a payor’s income, there could be a much longer list of disclosure that must be provided.

Chartered Business Valuators

For more complex situations, family lawyers rely on Chartered Business Valuators to complete an Income Determination Report. This is another potentially large topic which will be described in a separate post.

About the Author

Julie Stanchieri is a family lawyer with more than two decades of experience representing clients in all areas of family law, in both court proceedings and out-of-court resolutions. She is the founding partner of Stanchieri Family Law, a boutique firm established in downtown Toronto in 2008. Julie holds a Master of Laws (LL.M.) in Family Law from Osgoode Hall Law School and a Bachelor of Laws (LL.B.) from the University of Toronto. In addition to her legal practice, she is an accredited mediator and arbitrator, and a frequent speaker and author on family law issues.

Footnotes
  1. Line 15000 of a Canadian T1 personal tax return represents total income from all sources before deductions.↩︎
  2. See s. 19 of the Federal Child Support Guidelines↩︎
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ARTICLE

Income Determination

by admin on Apr 10 2026

Income Determination in Family Law

Income determination in family law involves assessing a party’s income for the purpose of calculating support obligations, including child support and spousal support. In Ontario, income is not always limited to what is reported on a tax return. Where income is unclear, inconsistent, or does not reflect a party’s true financial circumstances, further review may be required. Income determination may arise in a range of situations, including where a party is self-employed, receives variable or non-traditional income, or has access to financial resources through a business or other arrangements. The determination of income can significantly affect financial outcomes and may influence the direction of the matter as a whole.

How the Law Approaches Income Determination in Ontario

Ontario courts rely on financial disclosure and statutory guidelines when determining income. The Federal Child Support Guidelines provide a framework for calculating income, but courts may depart from reported income where it does not accurately reflect a party’s earning capacity or available resources. In certain circumstances, income may be imputed to a party. This may occur where a party is intentionally under-employed or unemployed, where income is diverted or retained within a business, or where financial disclosure is incomplete or unreliable. The court’s role is to assess the available evidence and determine an income figure that is fair, reasonable, and consistent with the circumstances. In some matters, this may involve expert evidence, including reports or opinions from third-party professionals.

Legal Complications

Income determination often involves elevated levels of complexity and, in some cases, increased conflict. Disputes may arise where parties rely on different interpretations of financial information or where income is not easily identified from standard documentation. Complexity may increase where a party is self-employed, where income fluctuates over time, or where financial arrangements involve corporations, trusts, or other structures. In these situations, financial records may require closer review to determine what income is actually available. Competing positions may also arise regarding expenses, retained earnings, or non-cash benefits. Urgency may arise where support obligations depend on timely income determination, particularly where interim arrangements are required. Early assessment of the level of conflict, complexity, and urgency is important, as income-related decisions can significantly affect financial outcomes and the overall direction of the matter.

Legal Considerations

Income determination requires a careful and structured legal approach. Practical considerations include ensuring complete and reliable financial disclosure, identifying relevant sources of income, and assessing whether the reported income reflects the party’s actual financial circumstances. Where income is unclear or disputed, further review may be required, including review of financial statements, corporate records, or other supporting documentation. In some cases, independent financial professionals may be involved to provide expert evidence, including reports or opinions, to assist in determining income. The objective is to arrive at a clear and supportable income figure that can be applied consistently within the broader family law matter.

Implications in Family Law Matters

Income determination can have a direct impact on child support, spousal support, and related financial obligations. Even relatively small differences in income can result in meaningful changes to support calculations and long-term financial outcomes. Income findings may also influence negotiation strategy, interim arrangements, and the structure of any resolution. Where income is not addressed carefully, the risk of ongoing disputes or future variation may increase. Addressing income determination in a clear and consistent way helps support stable and predictable outcomes.

Our Role as Family Lawyers

Our role is to provide legal advice and representation in matters involving varying levels of conflict, complexity, and urgency, including matters involving income determination. Our approach reflects the particular circumstances of each matter and the practical needs of our clients, recognizing that income may require detailed review where it is unclear, variable, or disputed. We remain responsive to changing circumstances, ensuring the matter continues to progress efficiently toward resolution.

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