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№ 77 Family Law

What Can a Marriage Agreement Include in British Columbia?

See which topics a British Columbia marriage agreement can cover, such as property, debt, business interests and spousal support, and which terms won't bind.

Family Law5 min readTSLBy the Treadstone Law Team · British ColumbiaUpdated November 1, 2026
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Key takeaways
  • Spouses can divide family property and debt equally or unequally, include or exclude items, and value them differently from the default rules.
  • A marriage agreement can set when spousal support changes or ends, and can release a spouse from spousal support, but a court may still intervene in limited cases.
  • Child support and parenting terms are generally not binding if made before separation is about to happen, and contact terms bind only if made among the guardians with decision-making authority over the child's associations.

If you and your partner are drafting a prenup, one of the first questions is what you can actually put in it. Some topics are well within your control. Others can be written down, but a British Columbia court will not treat them as binding.

This article sorts the common topics into what the Family Law Act allows, what it limits, and what it does not support. It is general information, so a lawyer can confirm how it applies to your situation.

This article covers the law of British Columbia.

Property and debt: the core of most agreements

Spouses may make agreements about dividing property and debt despite the usual property rules in Part 5 of the Act, subject to the court's power to set them aside. The default is that each spouse has a right on separation to an undivided half interest in family property, but that is expressly subject to an agreement that provides otherwise.

Business interests, homes and inheritances

These are among the most common reasons couples want an agreement. A business or a home that would otherwise be family property can be excluded, and a pre-marriage business interest or an inheritance can be brought in, if both spouses agree. Whether something is family property by default depends on the facts, so it helps to have a lawyer explain the starting position before you decide what to change.

Spousal support

An agreement about spousal support may provide for the circumstances under which support will change or end. A spouse may also agree to release the other from liability for spousal support, so a marriage agreement can waive it. One limit: a condition that a spouse abstain from sexual relations after separation is not binding.

A waiver is not untouchable. For a written agreement with each signature witnessed, the court can set aside or replace it if, when it was made, a spouse failed to disclose income, significant property or debts, took improper advantage of vulnerability, or did not understand it, or if other common law grounds apply. The court may decline to act on those grounds if it would not replace the agreement with an order substantially different from its terms. It can also act if the agreement is significantly unfair, taking into account changes since signing and how well it meets the objectives of spousal support.

If spouses have a written, witnessed spousal support agreement, the court may not make a spousal support order unless all or part of the agreement is set aside. A written spousal support agreement filed in the court is enforceable under the Act.

Children: what an agreement cannot do

TopicPosition under the Act
Child supportBinding only if made after separation, or when separation is about to happen and it is meant to take effect then
Parenting arrangementsBinding only if made after separation, or when separation is about to happen and it is meant to take effect then
Contact with a childBinding only if made among the guardians with decision-making authority over the child's associations
GuardianshipA person cannot become a guardian by agreement except in limited cases

Child support is determined under the child support guidelines. The court may order a different amount if the parties consent or have an agreement and it is satisfied that reasonable arrangements have been made for the child's support. Parenting terms that are not in the child's best interests can be set aside or replaced. In short, child support and parenting terms in a prenup are generally not binding unless they are made after separation, or when separation is about to happen and they are meant to take effect then.

Making it work: practical next steps

A written agreement is one that is signed by all parties. To fall within the court's set-aside regime for property, each signature must also be witnessed by at least one other person, and the same person may witness both. Spouses who are already married can also make a property agreement during the marriage.

Frequently asked questions

Can a prenup say I keep my business if we separate?

Generally yes. Spouses may agree to exclude items that would otherwise be included as family property, such as a business or a home. The agreement remains subject to the court's power to set it aside in limited situations.

Can we waive spousal support in a marriage agreement?

Yes, a spouse may agree to release the other from liability for spousal support. A court may still set aside or replace a waiver if it is significantly unfair or if a listed circumstance existed when it was signed.

Can a prenup decide parenting time or child support?

Not in a binding way. Both child support and parenting agreements are binding only if made after separation, or when separation is about to happen.

Does a prenup only work for married couples?

Not necessarily. The property agreement rules apply to spouses, and for the property rules a person is a spouse if married or after living with another person in a marriage-like relationship for a continuous period of at least 2 years. Once unmarried partners are spouses, the same agreement rules apply to them as to married spouses. How an agreement signed before you are spouses is treated depends on your situation, so it is worth confirming with a lawyer.

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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