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Does Living Together Before Marriage Count After Separation in Ontario?

Learn how years of living together before marriage count for spousal support but not equalization in Ontario, and what happens to a cohabitation agreement.

Family Law4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 13, 2026
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Key takeaways
  • For spousal support, the years you lived together before the wedding can count, because courts look at how long the spouses cohabited.
  • For equalization, pre-marriage years do not count, because property owned on the date of marriage is deducted.
  • A cohabitation agreement is deemed to be a marriage contract if the parties marry each other.

Many couples live together for years before they marry. If you later separate, you may wonder whether those earlier years are treated as part of the relationship or as if they never happened.

The answer depends on what you are claiming. Spousal support and property equalization follow different rules, and an agreement you signed before the wedding may also change its legal character once you marry.

Spousal support: the earlier years can count

When a court decides spousal support, it must consider all the circumstances. For a spouse who is the dependant, these include how long the parties cohabited, and how caring for a child or taking on household work affected earnings and career. Under the federal Divorce Act, a court making a spousal support order must also consider the length of time the spouses cohabited.

Lawyers and judges often use the Spousal Support Advisory Guidelines to help set the amount and length of support, but they are only guidelines. Under the federal User's Guide, the length of cohabitation, not just the length of the marriage, sets the amount and duration of support under the without child support formula. That is how years spent living together before the wedding can count.

Support is still not automatic. You must show a basis for it, such as caregiving or career sacrifices during the relationship, need after separation together with the other spouse's ability to pay, or an agreement that provides for support.

Equalization: the earlier years do not count

Equalization of net family property applies to married spouses. On divorce, nullity, or separation with no reasonable prospect of resuming cohabitation, the spouse with the lower net family property is entitled to one-half of the difference.

Pre-marriage cohabitation does not count here. Net family property deducts the value of property, other than a matrimonial home, that a spouse owned on the date of the marriage, net of debts on that date. Growth during the years of living together before the wedding is therefore not shared through equalization.

There is one exception. The date-of-marriage deduction does not apply to a matrimonial home, so a home one partner owned before the wedding that becomes the family residence is not deducted.

IssueDo pre-marriage years count?
Spousal supportYes, the length of cohabitation is considered
Equalization of propertyNo, property owned on the wedding date is deducted
Matrimonial home owned before the weddingNot deducted, so the exception applies

If you had a cohabitation agreement before marrying

Two unmarried people who are cohabiting or intend to cohabit may make a cohabitation agreement. It can cover property, support and other matters, though it cannot fix decision-making responsibility or parenting time for children.

If the parties to a cohabitation agreement marry each other, the agreement is deemed to be a marriage contract. One consequence is that any provision in a marriage contract that tries to limit a spouse's matrimonial home rights is unenforceable.

An agreement that deals with a matter also covered by the Family Law Act generally prevails unless the Act provides otherwise. So what your agreement says about property and support can matter a great deal, which is why its exact wording is worth reviewing with a lawyer.

Rules that still apply to your agreement

Ontario's guidance advises that partners should speak to different lawyers and exchange financial information before signing.

Deadlines and what to do next

An equalization claim by married spouses must be brought by the earliest of two years after a divorce or nullity judgment, six years after separation with no reasonable prospect of resuming cohabitation, or six months after the first spouse's death. By contrast, there is no limitation period for a proceeding to obtain support under the Family Law Act.

Frequently asked questions

Do my common-law years count if we married and then separated?

They can count for spousal support, because courts consider how long the spouses cohabited. They do not count for equalization, because property owned on the wedding date is deducted.

Does the home I owned before the wedding get shared?

The date-of-marriage deduction does not apply to a matrimonial home, so a home you owned before the wedding that became the family residence is not deducted. Other property you owned on the wedding date is deducted.

What happens to my cohabitation agreement after we marry?

It is deemed to be a marriage contract. Any term limiting matrimonial home rights is unenforceable.

Is there a deadline to claim spousal support?

There is no limitation period for a proceeding to obtain support under the Family Law Act. Equalization claims do have deadlines, so it is worth getting advice early.

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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