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Indefinite Spousal Support After a Long Marriage in Ontario

After 20 or more years of marriage, can spousal support continue without an end date? Learn how the Rule of 65 and indefinite support work in Ontario.

Family Law4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 1, 2026
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Key takeaways
  • Under the guidelines, support is indefinite if the marriage lasted 20 years or more, or under the rule of 65.
  • Indefinite does not mean permanent, because support stays subject to variation and review.
  • Retirement, a recipient's new relationship and self-sufficiency can all affect an indefinite order, depending on the facts.

After a long marriage, many people expect support to last for life, or fear it will. The reality is more nuanced. The Spousal Support Advisory Guidelines (SSAG) often point to support with no set end date, but that is not the same as support that can never change.

This article explains the rule of 65, what indefinite really means, and the events that commonly lead to a change.

When support is indefinite under the guidelines

The SSAG are not law, but judges often base their spousal support decisions on them. Under the without-child-support formula, duration is generally 0.5 to 1 year for each year of cohabitation. Support is indefinite in two situations:

The rule of 65 does not apply to marriages under 5 years. Entitlement must still be established first. An income gap alone does not create it.

Indefinite does not mean permanent

Indefinite support does not necessarily mean permanent support. It only means no time limit can be set when the order or agreement is made, and the support stays subject to variation and review.

A court can vary, rescind or suspend a spousal support order, retroactively or prospectively, on an application by either or both former spouses. Before varying, it must be satisfied that either former spouse's circumstances have changed since the order or the last variation, and it must take that change into account.

A review is different from a variation. A variation requires a material change in circumstances, while a review is more like an initial application, and the terms of the review clause should limit what is reviewed.

How much support after a long marriage

Under the without-child-support formula, support ranges from 1.5% to 2% of the difference between the spouses' gross incomes for each year of cohabitation. The cap is 50%, and the top of the range cannot exceed the amount that would equalize the spouses' net incomes.

The formulas do not apply mechanically at the extremes. Above a payor income of $350,000, discretion is used, and incomes below $20,000 or $30,000 require adjustments. Recognized grounds for going outside the ranges include illness and disability, debt payments, property division, and basic needs or hardship.

What can change or end indefinite support

What to do next

If you are negotiating or facing a change, the details of your order or agreement matter, including any review clause or retirement wording. If your situation has changed, only a court can change an order, through a motion to change. After it is issued, you must serve the other spouse within 30 days and file an Affidavit of Service (Form 6B), and the other spouse has 30 days to respond, or 60 days if they live outside Canada or the United States.

The Family Responsibility Office cannot change support terms, and it does not pay when a payor misses a payment.

Frequently asked questions

What is the rule of 65?

It makes support indefinite when the marriage lasted at least five years and the years of marriage plus the recipient's age at separation total 65 or more. It does not apply to marriages under 5 years.

Is support after 20 years automatically for life?

No. A marriage of 20 years or more points to indefinite support, but indefinite only means no time limit is set at the start, and the support stays subject to variation and review.

Does remarriage end spousal support?

Not automatically. Support is often reduced and sometimes ended, and courts weigh factors such as the length of the first marriage, the recipient's age, and the new household's stability.

Can I stop paying when I retire?

Retirement is usually a material change that can support a variation if the order is silent on it, but voluntary early retirement may be found not to be a material change. Only a court can change an order, so get advice first.

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.

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