Quebec is the only Canadian province governed by civil law rather than common law, and its rules for marriage contracts (contrats de mariage) differ fundamentally from the prenuptial agreements used in the other provinces. Quebec marriage contracts must be signed before a notary and registered in a public register. They can modify the matrimonial regime, set rules for the family patrimony, and make donations of property — but they cannot override the protective provisions of the Civil Code of Québec.
What is a Civil Code regime and notary requirements?
A Quebec marriage contract is a notarial deed entered into before or during marriage that modifies the default matrimonial regime applicable to the spouses. The default regime under Civil Code of Québec (CCQ) Article 432 is partnership of acquests. Spouses may opt for separation as to property (séparation de biens) or community of property (communauté de biens) by marriage contract. The marriage contract may also include donations between spouses, modifications to inheritance rules, and other arrangements. Critically, the marriage contract cannot derogate from the rules on family patrimony (CCQ Articles 414-426) or the obligation of support — these apply regardless of contract.
Red flags to watch for
Articles 414-426 CCQ establish the family patrimony — the residence, household furnishings, motor vehicles for family use, and pension assets accrued during marriage — which is divided equally on divorce regardless of the matrimonial regime. Any clause purporting to exclude these assets is null.
Article 585 CCQ imposes a duty of support between spouses. A marriage contract cannot waive this prospectively — courts may award support irrespective of the contract.
Marriage contracts must be in notarial form under Article 440 CCQ. A private writing or even a notarised contract from another jurisdiction may not be valid in Quebec.
Donations between spouses under a marriage contract must comply with formality rules. An improperly drafted donation may be revocable or unenforceable.
While the Civil Code does not explicitly require disclosure as common-law prenups do, courts have set aside marriage contracts where one spouse made material misrepresentations. Insist on full and documented disclosure.
An Ontario or BC prenup may not be recognised in Quebec, especially if the spouses establish their domicile in Quebec. The applicable matrimonial regime is determined by the law of the first common domicile of the spouses (CCQ Article 3123).
Children's matters cannot be predetermined by marriage contract. Courts retain jurisdiction to determine custody and child support based on the best interests of the child at the relevant time.
While Quebec notaries are officers of the state and act impartially, the parties should still consider independent legal advice — particularly where the regime change has substantial economic consequences for one party.
Your legal rights
Quebec marriage contracts are governed by the Civil Code of Québec, particularly Articles 431-442 (general rules on marriage contracts), 414-426 (family patrimony), 432-491 (matrimonial regimes — partnership of acquests, community of property, separation as to property), 585-596 (obligation of support), and 3088-3123 (private international law). The Notaries Act (RLRQ c N-3) regulates notarial practice. The Civil Marriage Act (Canada, S.C. 2005, c 33) sets federal marriage requirements. The Divorce Act (Canada, R.S.C. 1985, c 3 (2nd Supp.)) governs divorce, spousal support and parenting matters federally and applies in Quebec.
Questions to ask before you sign
- 1Which matrimonial regime are we adopting — partnership of acquests, separation as to property, or community of property — and what does each mean for our assets?
- 2Does the contract clearly preserve the family patrimony, and have we discussed which assets are in it?
- 3Are donations between us properly drafted and registered?
- 4Have we both received full financial disclosure, and is it documented?
- 5Is the contract being signed in notarial form by a Quebec notary?
- 6If we have an existing common-law prenup from another province, how does Quebec law treat it?
- 7Have we both had the opportunity for independent legal advice?
- 8If we move out of Quebec, what private international law rules will govern our regime?
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.