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

Spousal Support Advisory Guidelines Explained for Ontario Families

Find out what the Spousal Support Advisory Guidelines are, whether Ontario judges must follow them, and how the formulas set amount and length of support.

Family Law4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 1, 2026
← All articles
Key takeaways
  • The Spousal Support Advisory Guidelines are not law, but judges often base spousal support decisions on them.
  • They apply only after entitlement is established, and an income gap alone does not create entitlement.
  • There are two main formulas, one without child support and one with, and both allow exceptions.

If you are separating, you may have heard a lawyer or judge refer to 'the guidelines' for spousal support. They shape many negotiations, yet they are often misunderstood.

This article explains what the Spousal Support Advisory Guidelines (SSAG) are, whether they bind a court, and how they generally work in Ontario.

What the SSAG are, and whether they are binding

The SSAG are not law, but judges often base their spousal support decisions on them. They were designed for the federal Divorce Act, and courts and lawyers also often use them under provincial legislation such as Ontario's Family Law Act.

Think of them as a well-known reference point. They give a range for amount and length, and a judge or the parties can land inside or outside that range depending on the facts.

Entitlement comes first

The SSAG do not decide whether you are entitled to support. Entitlement must first be established under the applicable law. An income gap on its own does not create entitlement, and it must be proven or agreed before the formulas apply.

In Ontario, you may be eligible for spousal support if you were married, if you lived together as a couple for at least three years, or if you were in a relationship of some permanence and had a child together.

Entitlement has three possible bases:

The two main formulas

Which formula applies depends mainly on whether there is child support.

FeatureWithout child supportWith child support
Amount1.5% to 2% of the gross income difference for each year of cohabitation, capped at 50%Support that leaves the lower-income recipient with 40% to 46% of the couple's combined Individual Net Disposable Income, which is income after child support, taxes and deductions
Length0.5 to 1 year for each year of cohabitationIndefinite at first, with outer limits on review or variation

Under the without-child-support formula, the top of the range cannot exceed the amount that would equalize the spouses' net incomes. Support is indefinite if the marriage lasted 20 years or more, or under the 'rule of 65': the marriage lasted at least five years and the years of marriage plus the recipient's age at separation total 65 or more.

Under the with-child-support formula, the upper limit is the longer of the length of the marriage or the date the youngest child finishes high school. The lower limit is the longer of half the length of the marriage or the date the youngest child starts full-time school.

Exceptions and limits

The formulas do not apply mechanically. Above a payor income of $350,000, discretion is used, and incomes below $20,000/$30,000 require adjustments. Short marriages produce very limited awards, if there is entitlement at all, and the rule of 65 does not apply to marriages under 5 years.

Recognized grounds for going outside the ranges include:

There is also a compensatory exception for short and short-to-medium marriages without children, assessed individually. When a short marriage breaks down while a sponsorship agreement is in place, the sponsorship agreement may be an independent factor that leads to an amount or duration outside the formula ranges. A zero range under the with-child-support formula is not the same as no entitlement, since it may only reflect a current inability to pay.

The SSAG start from the definition of income in the Federal Child Support Guidelines. For a spouse who is not working but should be, a court can readily impute minimum-wage income, while imputing anything higher requires evidence. Ontario's spousal support page notes that the free online SSAG calculator it links to considers only employment income and simple calculations.

Changes, reviews and next steps

'Indefinite' support does not necessarily mean permanent. It means no time limit can be set when the order or agreement is made, and support stays subject to variation and review. A review is different from a variation: a variation requires a material change in circumstances, while a review is more like an initial application. The SSAG apply on both but should be used with considerable caution where complex entitlement issues arise.

The SSAG apply to interim orders as well as final orders, and where income evidence is thin, ranges can be estimated using alternative income figures. Any period of interim support, and informal voluntary support, counts toward the SSAG duration limits.

If an order or agreement says nothing about retirement, retirement is usually a material change that can support a variation, but courts closely examine early retirement. A recipient's remarriage or new relationship does not automatically end spousal support, though support is often reduced and sometimes ended.

Frequently asked questions

Do Ontario judges have to follow the SSAG?

No. The SSAG are not law, but judges often base their spousal support decisions on them.

Do the SSAG apply to unmarried couples?

They were designed for the Divorce Act, and courts and lawyers also often use them under provincial legislation such as Ontario's Family Law Act. Entitlement still has to be established first.

Does a high income gap mean I get support?

No. An income gap on its own does not create entitlement, which must be proven or agreed before the formulas apply.

Does 'indefinite' support last forever?

Not necessarily. It only means no time limit can be set when the order is made, and the support stays subject to variation and review.

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 →