In Canada, a prenuptial agreement (often called a marriage contract or domestic contract) is a legal document signed before marriage that sets out how you and your partner will divide assets, property, and support if the relationship ends. Unlike some countries, Canadian prenups are generally enforceable—but only if they meet strict statutory requirements. The most critical requirement is that both parties had independent legal advice from separate lawyers before signing. This is not optional; if either party signed without their own lawyer advising them, the contract is highly vulnerable to being set aside by a court. Additionally, family law is primarily provincial jurisdiction in Canada, meaning the rules for Ontario differ from British Columbia, Alberta, Quebec, and other provinces. A marriage contract that's valid in Ontario may not be enforceable in British Columbia, or vice versa, particularly if you move between provinces during your marriage. The purpose of independent legal advice is to ensure both parties genuinely understand what they're agreeing to, that they're not under duress or undue influence, and that they've had a fair opportunity to negotiate. Judges have set aside marriage contracts where one party didn't have proper independent advice, or where one party failed to disclose significant assets. Understanding your province's specific Family Law Act (or civil code in Quebec) is essential because the rules vary, particularly regarding what can and cannot be contracted out of (like spousal support requirements).
What is a Independent Advice & Provincial Requirements?
A Canadian marriage contract (prenuptial agreement) is a binding legal agreement signed before marriage (or after, though called a domestic contract post-marriage) that sets out how the parties will divide property, assets, debts, and spousal support if the relationship ends. It is governed by provincial Family Law Acts (or the Civil Code in Quebec) and is enforceable if executed properly. The most critical requirement is that both parties must have obtained independent legal advice from separate lawyers before signing. 'Independent' means each party's lawyer has no conflict of interest and is not representing both parties. The lawyer must explain the legal implications of the contract, the parties' legal rights without it, and the consequences of signing. Both parties must provide full financial disclosure before signing. The contract must be signed (typically dated and witnessed, though witness requirements vary by province). Once properly executed, a marriage contract is binding and the court will generally enforce its terms unless it is manifestly unconscionable at the time of enforcement, or unless one party obtained it through misrepresentation or duress. A properly drafted marriage contract can address property division, spousal support, and sometimes custody arrangements (though custody terms may be subject to change based on children's best interests).
Red flags to watch for
Under all Canadian provincial Family Law Acts (Ontario s.56, BC s.93, Alberta s.45, etc.), a marriage contract is unenforceable if a party did not obtain independent legal advice. Courts have consistently set aside contracts where one party was unrepresented. Even if signed, lack of independent advice is grounds for the contract to be declared void.
If a lawyer was consulted only days before the wedding, it suggests one party felt pressured and may not have had meaningful time to consider, consult, and negotiate. Courts look suspiciously at last-minute independent advice.
Both parties must make complete and honest disclosure of all assets, debts, income, and liabilities before signing. If one party concealed a property, business, or investment account, the contract can be set aside for material non-disclosure.
Canadian courts can refuse to enforce a marriage contract if it is 'manifestly unreasonable' or unconscionable at the time of enforcement. If one party received almost nothing and the other got nearly everything, courts may intervene.
If one party was threatened, pressured, or unduly influenced into signing (e.g., 'sign this or I won't marry you'), the contract is invalid. This is often difficult to prove but any evidence of coercion is relevant.
A marriage contract valid in Ontario may not be enforceable in BC if you move or if you were married in a different province. You should have a family lawyer in your current province review enforceability.
Your legal rights
Canadian marriage contracts are governed primarily by provincial Family Law Acts. In Ontario, the Family Law Act, R.S.O. 1990, c. F.3, Part IV govides domestic contracts. Section 56 provides that a domestic contract is unenforceable unless both parties received independent legal advice from a separate lawyer before signing. British Columbia's Family Law Act, S.B.C. 2011, c. 25, Part 5, section 93 imposes similar requirements. Alberta's Family Law Act, R.S.A. 2000, c. F-4.1, section 45 also requires independent legal advice. Quebec, under its Civil Code, Articles 431-432, allows marriage contracts but with specific formality requirements. All provinces recognize that material non-disclosure of assets, duress, or unconscionable terms may render a contract unenforceable. Courts in all provinces have the power to refuse enforcement if the contract would be manifestly unreasonable at the time of enforcement (e.g., if it would leave one spouse in hardship). The Divorce Act (Canada), R.S.C. 1985, c. 3 (2nd Supp.), allows couple to contract out of some default rules, but spousal support terms in a marriage contract can be varied by a court if there has been a material change in circumstances.
Questions to ask before you sign
- 1Did I have my own independent lawyer review this marriage contract, and was it a different lawyer from my spouse's?
- 2Did my lawyer explain what my legal rights would be without the contract?
- 3What was the date of my independent legal advice, and how much time did I have between obtaining advice and signing?
- 4Did my spouse make full financial disclosure of all assets, investments, property, and income before we signed?
- 5Does the contract address property division, spousal support, and/or other matters, and are the terms fair to both parties?
- 6In which province was this contract created, and where are we currently living? Do the laws of my current province apply?
- 7Has there been a material change in circumstances since the contract was signed (e.g., significant change in income, major assets acquired, children born)?
Disclaimer: This guide is for educational purposes only and does not constitute legal advice. Contract law varies by jurisdiction and individual circumstances. Always consult a qualified legal professional before making decisions based on this information.