TREADSTONE LAW · ONTARIO · DIGITAL LEGAL SERVICES · EST. MMXXI ·TSL
Licensed by the Law Society of OntarioFlat fees published upfrontWe reply to messages within 1 business daySign in
№ 77 Family Law

Financial Disclosure Before Signing a Prenup in British Columbia

Learn what financial information to share before signing a prenup in British Columbia, and what can happen if assets or debts were hidden from you.

Family Law5 min readTSLBy the Treadstone Law Team · British ColumbiaUpdated November 6, 2026
← All articles
Key takeaways
  • A British Columbia court can set aside or replace all or part of a witnessed property agreement if a spouse failed to disclose significant property or debts.
  • Even where nothing was hidden, the court may step in if an agreement is significantly unfair, looking at time passed, the wish for certainty and reliance on its terms.
  • Before you sign, ask for a full picture of the other person's assets, debts and income, and get legal advice, even though the Act does not make advice a condition of validity.

If your partner has handed you a prenup and a pen, one of your first questions should be: do I actually know what they own and owe? An agreement that divides property and debt is only as fair as the information behind it.

This article explains how British Columbia's Family Law Act treats disclosure, what you can reasonably ask for, and what may happen later if the other side left something out. It is general information, not advice on your situation.

This article covers the law of British Columbia.

What the Family Law Act says about disclosure

The Act lets spouses make agreements about dividing property and debt, despite the usual rules in Part 5. It also lets them divide family property and family debt equally or unequally. That freedom is the reason disclosure matters: you may be agreeing to give up a share you would otherwise have.

Without an agreement, spouses are presumptively entitled to family property and responsible for family debt, with each having a right on separation to an undivided half interest in family property, subject to an agreement or order that provides otherwise.

The Act does not set out a disclosure form. What it does is give the court power to act later if a spouse failed to disclose significant property or debts, or other information relevant to the negotiation of the agreement.

What information is worth asking for

The Act speaks of significant property and debts and of information relevant to the negotiation. In practice, that points to anything that would change how you view the deal. Common items to ask about include:

Why this matters in detail: spouses may agree to exclude items that would otherwise be included, such as a business or a home, or to include items that would not otherwise count, such as an inheritance or a pre-marriage asset. They may also agree to value property differently than the default valuation would. Each of those choices depends on knowing what the asset is worth.

If the other side hid assets or debts

For a written property agreement with each spouse's signature witnessed by at least one other person, the Supreme Court may set aside or replace all or part of it on a spouse's application, but only if one of the listed circumstances existed when the agreement was made. Failure to disclose significant property or debts, or other relevant information, is one of those circumstances.

Non-disclosure is not the only route. The court may also act where a spouse took improper advantage of the other's vulnerability, or where a spouse did not understand the nature or consequences of the agreement. Hidden information can overlap with these.

There is a limit. Even if a ground is proven, the court may decline to act if, on all the evidence, it would not replace the agreement with an order substantially different from the agreement's terms. A hidden asset that would not have changed the result may not lead to a different outcome.

If nothing was hidden but the deal turns out badly unfair, the court may still set aside or replace all or part of the agreement if it is significantly unfair. It considers the time since the agreement was made, the spouses' intention to achieve certainty, and how much they relied on its terms.

Spousal support, children and disclosure

A spouse may agree to release the other from spousal support. For a witnessed spousal support agreement, the court may set it aside or replace it if, when it was made, a spouse failed to disclose income, significant property or debts. Income disclosure is therefore especially relevant if a support waiver is in the draft.

Child-related terms are different. An agreement about child support is binding only if made after separation, or when the parties are about to separate and intend it to take effect on separation. Parenting arrangements follow a similar rule. Terms about children in a prenup should not be treated as settled.

What to do before you sign

If you have already signed and think something was hidden, collect the documents and speak to a family lawyer promptly. Whether a particular omission is significant, and whether a court would change the result, depends on the facts.

Frequently asked questions

Does BC law require a prenup to come with financial disclosure statements?

The sections of the Family Law Act on property agreements do not set out a required disclosure form. Instead, failure to disclose significant property or debts, or other relevant information, is a ground on which the court may set aside or replace a witnessed agreement. In practice, exchanging documents protects both sides.

Is a lawyer required for the prenup to be valid?

The Act's requirements are a written agreement signed by the spouses, with each signature witnessed by at least one other person. A lawyer or independent legal advice is not a condition of validity, although the Province advises getting legal advice.

Can the agreement be changed if my partner hid a debt?

The court can set aside or replace all or part of a witnessed agreement where significant debts were not disclosed. It may decline to act if the result would not be substantially different from the agreement. A lawyer can assess what applies to you.

Do the same rules apply if we are not married?

The same sections apply to spouses, and a person can be a spouse by living in a marriage-like relationship for at least 2 years. Whether you are a spouse at a given point depends on your facts.

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.

This is a family law question

An uncontested divorce with us is from $2,126.88, tax included. Third-party fees are extra.

ContactStart a File →