Spousal Support Law in Ontario: What You Need to Know

A comprehensive guide to spousal support law in Ontario, including who qualifies, how amounts are calculated using the SSAG, and how long support is paid.

06/02/2026 Guides
Spousal Support Law in Ontario: What You Need to Know

Spousal support is a payment made by one spouse to the other after separation or divorce to address the economic consequences of the relationship breakdown. Understanding how spousal support works in Ontario can help you make informed decisions about your financial future.

Is Spousal Support Automatic in Ontario?

No. Spousal support is not automatically owed in every separation. There must be an entitlement to support before the amount and duration are considered. Entitlement may be based on compensatory grounds (addressing economic disadvantage suffered due to the marriage), non-compensatory grounds (addressing need), or contractual grounds (where the parties agreed to support).

Who Is Entitled to Spousal Support?

Either spouse may be entitled to spousal support — there is no gender distinction in the law. Courts look at factors such as the length of the relationship, the roles each spouse took on during the marriage, the economic advantages and disadvantages of the marriage and its breakdown, and each spouse’s financial circumstances.

The Spousal Support Advisory Guidelines (SSAG)

The Spousal Support Advisory Guidelines (SSAG) are a non-binding but highly influential framework used by lawyers and courts across Canada to determine ranges for spousal support amounts and duration. They do not create entitlement — that must first be established — but they provide a principled basis for determining what support should be paid once entitlement exists.

Without Child Support Formula

Where there are no dependent children, the SSAG use the income difference between the spouses and the length of the marriage to calculate ranges for monthly support and its duration. Longer marriages generally produce higher and longer-lasting support obligations.

With Child Support Formula

Where child support is also being paid, the SSAG use a different formula that takes into account the sharing of child-related costs. This formula is more complex but produces a range of support based on the net disposable income of each spouse after child support and taxes.

How Long Does Spousal Support Last?

The duration of spousal support depends on the length of the marriage, the basis for entitlement, and whether the recipient can become financially self-sufficient. Short marriages may produce time-limited support. Long marriages or those where one spouse sacrificed career opportunities may result in indefinite support obligations.

Can Spousal Support Be Changed?

Yes. Spousal support can be varied if there is a material change in circumstances. This could include a change in either spouse’s income, the recipient remarrying or entering a common law relationship, or the recipient achieving financial self-sufficiency. Variation can be agreed upon by the parties or ordered by a court.

Lump Sum vs. Periodic Spousal Support

Spousal support can be paid as a regular monthly payment (periodic support) or as a one-time lump sum. A lump sum provides finality and avoids ongoing financial ties between the spouses, but it must be carefully calculated to account for taxes and future contingencies. Periodic support allows for adjustments over time.

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