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№ 77 Family Law

Do You Need a Cohabitation Agreement in BC?

Thinking of moving in together? Learn what a cohabitation agreement can cover in British Columbia, and when a BC court may set one aside.

Family Law4 min readTSLBy the Treadstone Law Team · British ColumbiaUpdated November 1, 2026
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Key takeaways
  • Couples who live together in a marriage-like relationship for at least 2 years can face property division rules, and they can opt out of those rules by agreement.
  • Spouses may divide property and debt equally or unequally by agreement, and a witnessed written agreement can be set aside only on listed grounds.
  • Honest financial disclosure and understanding the agreement make it more likely to hold up.

Moving in together is exciting, and talking about money can feel awkward. Still, many couples wonder whether a written agreement is worth the effort.

In British Columbia, the Family Law Act already has default rules for people who live together. A cohabitation agreement lets you decide whether to follow them or set your own terms. This article explains what is at stake.

This article covers the law of British Columbia.

What the law does if you have no agreement

A person is a spouse if they are married, or have lived with another person in a marriage-like relationship for a continuous period of at least 2 years. Property division rules apply to unmarried couples who meet that test, and couples can opt out of those rules by agreement.

Spouses are generally equally entitled to and responsible for family property and family debt. Excluded property, such as property acquired before the relationship and inheritances, is kept out of that pool, although any increase in its value since the relationship began is generally shared.

Support works differently. A couple together less than 2 years who have a child together are still spouses outside the property and pension parts of the Act, so spousal support can apply sooner than property division.

What an agreement can cover

Spouses may make agreements dividing property and debt equally or unequally. A spouse may also agree in writing to release the other from spousal support.

What an agreement can say about parenting is a separate question, so raise it with a lawyer rather than assuming it works the same way.

When a BC court may set an agreement aside

The court can set aside a witnessed written property agreement only on listed grounds, such as a spouse failing to disclose significant property or debts, or not understanding the agreement.

For spousal support, where a witnessed written agreement exists, the court may not order support unless the agreement is first set aside under s. 164. It can be set aside for reasons such as non-disclosure of income, property or debts, or if it is significantly unfair.

Even without an agreement, the Supreme Court may order an unequal division of family property or debt if an equal division would be significantly unfair.

TopicWhat the Act says
Property and debtAgreement may divide equally or unequally; set aside only on listed grounds
Spousal supportWritten release possible; court may not order support unless the agreement is set aside
Opting out of property rulesCouples can opt out by agreement

Is an agreement worth it for you?

An agreement may be especially useful if one of you owns a home or has significant savings, a business or an expected inheritance, or if you want to avoid arguing later about who owns what. Without one, the default rules apply once you meet the two-year test.

An agreement is not a promise that every dispute is avoided. A witnessed written property agreement can be set aside if, for example, a spouse failed to disclose significant property or debts, or did not understand the agreement. Spousal support terms can also be set aside if they are significantly unfair.

What to do next

Each of you may wish to get your own legal advice, which can help show that you understood what you signed.

Frequently asked questions

Do we need a cohabitation agreement to be protected?

No agreement is required, but the default rules apply if you have none. Unmarried couples who have lived together in a marriage-like relationship for at least 2 years can face property division rules, and they can opt out by agreement.

Can an agreement stop spousal support?

A spouse may agree in writing to release the other from spousal support. Where a witnessed written agreement exists, the court may not order support unless the agreement is first set aside.

Can a court ignore our agreement?

A witnessed written agreement can be set aside only on listed grounds, such as non-disclosure of significant property or debts, or a spouse not understanding the agreement. Support terms can also be set aside if significantly unfair.

When should we make one?

Before or soon after you move in is a sensible time, since the relationship is counted from when you began living together once the 2-year threshold is met. A lawyer can help you decide what to include.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. British Columbia 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 lawyer who practises in British Columbia. Reach us at 1-844-900-1070 or send our Team a message.

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