Quebec stands apart from every other province in Canada when it comes to the legal treatment of unmarried couples. Unlike most jurisdictions, common-law partners in Quebec (known as de facto spouses) do not receive automatic rights to property division or spousal support upon separation, regardless of how long they have lived together or whether they have children.

This unique legal landscape makes cohabitation agreements, referred to in Quebec as contracts of cohabitation (contrat de vie commune), especially important. These agreements allow de facto spouses to create their own legal protections and obligations, since provincial legislation does not provide them by default.

This article explains how cohabitation agreements work in Quebec, outlines the statutory framework that supports them, and explores their enforceability and distinctive features under Quebec civil law.

Are Cohabitation Agreements Permitted in Quebec?

Yes. Although Quebec law does not impose legal rights or obligations on de facto spouses, it allows and encourages such couples to enter into cohabitation agreements to formalize their relationship and define their legal and financial obligations.

While there is no specific provision in the Civil Code of Québec that exclusively governs cohabitation agreements for unmarried spouses, these agreements are valid and enforceable under the general rules of contract law .

Thus, a cohabitation agreement in Quebec is treated as a civil contract between two consenting parties and is enforceable like any other private contract, provided it does not contravene public order or good morals.

Why Are Cohabitation Agreements Especially Important in Quebec?

The need for cohabitation agreements is more acute in Quebec than in any other Canadian province because common-law partners are excluded from key family law protections, including:

• No division of property upon separation: There is no legal regime like the partage du patrimoine familial (division of family patrimony) or matrimonial regime for unmarried couples.
• No automatic right to spousal support
• No automatic inheritance rights under the Civil Code, unless explicitly provided for in a will
• No legal obligation to provide for a partner upon separation or death, regardless of relationship length

What Can a Cohabitation Agreement Cover in Quebec?

A Quebec cohabitation agreement can cover virtually any aspect of the couple’s personal and financial relationship, including:

• Ownership and use of property acquired before or during the relationship
• Responsibility for household expenses and debts
• Division of assets upon separation
• Spousal support or financial assistance
• Right to remain in the family home after separation
• Gifts or financial contributions to each other
• Mutual obligations during the relationship
• Provisions upon death (though not a substitute for a will)

There are, however, some limitations:

• The agreement must not violate public order (e.g., clauses that waive child support, or that are punitive or immoral)
• The agreement cannot override statutory protections for children
• Any clauses related to death should be supported by a notarial will or estate planning documents, as cohabitation agreements do not control succession law

What Makes a Cohabitation Agreement Enforceable in Quebec?

Under the Civil Code of Québec, a contract—including a cohabitation agreement—is enforceable if it satisfies general conditions of validity. These include:

1. Consent

The parties must freely and voluntarily agree to the terms. If one party was misled, coerced, or lacked capacity, the agreement may be annulled.

2. Capacity

The parties must be legally capable of contracting. This includes being of the age of majority and having mental capacity.

3. Lawful Cause

The agreement must have a valid purpose. For example, parties may agree to divide property or pay support, but cannot contract for anything contrary to public order.

4. Object

The subject matter of the contract must be clear, lawful, and possible.

5. Form

There is no specific form requirement for cohabitation agreements in Quebec, they may be verbal or written, but written agreements are essential for enforceability. A notarial act (acte notarié) provides greater legal weight, especially if enforcement is required.

6. Good Faith and Public Order

Even if an agreement meets all formalities, it may be invalid if it:

• Was entered into in bad faith
• Contains provisions that are abusive or unconscionable
• Contravenes public order or the best interests of a child

Is Independent Legal Advice Required?

No, but it is strongly recommended.

Quebec law does not require independent legal advice (ILA) for cohabitation agreements to be valid. However, having both parties receive ILA:

• Strengthens the agreement’s enforceability
• Reduces the risk of future challenges
• Shows that each party understood the agreement’s consequences

If the agreement is notarized (via acte authentique), the notary must verify that both parties understand the contents and are entering into the contract freely.

Should the Agreement Be Notarized?

While notarization is not mandatory, it is highly recommended in Quebec for several reasons:

• A notarial act is an authentic act and carries presumptive evidentiary value
• It avoids disputes over whether the agreement was signed or understood
• It simplifies enforcement if litigation arises

A notarial cohabitation agreement is also more difficult to challenge on grounds of fraud, duress, or lack of understanding.

Can a Cohabitation Agreement Provide for Support or Division of Property?

Yes. Since Quebec law does not impose support or property division obligations on common-law partners, such terms must be expressly created by contract.

Examples include:

• A clause granting one party the right to remain in the home or receive financial assistance for a set period after separation
• A formula for dividing jointly acquired property
• Compensation for unpaid work, caregiving, or investments in the other’s property
• Agreement on the repayment of loans or sharing of debts

These types of clauses are enforceable, provided they comply with civil contract law and are not abusive.

Can a Cohabitation Agreement Waive Inheritance Rights?

In Quebec, de facto spouses do not have any legal inheritance rights under intestate succession rules in the Civil Code. Therefore:

• If a person dies without a will, their common-law partner inherits nothing, regardless of how long they cohabited
• A cohabitation agreement cannot substitute for a will, but it can reflect the parties’ mutual intentions and include promises to make a will, designate a beneficiary, or provide compensation upon death

To be legally effective, such provisions must be backed by an enforceable will or other estate planning measures (e.g., naming the partner as beneficiary of an RRSP, life insurance, etc.).

Unique Considerations in Quebec

Quebec’s civil law framework creates several distinctive considerations:

1. No Legal Regime for Common-Law Spouses

De facto spouses have no property rights, support rights, or succession rights under Quebec law unless they create them through contract.

2. Contractual Freedom Is Paramount

Unlike other provinces that have overriding statutory protections, Quebec couples must opt in to legal protections. This gives them great freedom but also places the burden on them to act.

3. Best Practice: Combine Cohabitation Agreement with Notarial Will

Because Quebec’s laws do not protect common-law partners by default, parties should pair a cohabitation agreement with a notarial will, mandate in case of incapacity, and appropriate beneficiary designations.

Best Practices for Drafting a Quebec Cohabitation Agreement

• Put the agreement in writing—verbal agreements are hard to enforce
• Use a notary to execute the agreement as a notarial act, if possible
• Be clear about:
  • Ownership of existing and future property
  • Division of property and support upon separation
  • Payment of debts or expenses
  • Compensation for contributions or caregiving
  • Death or incapacity provisions
• Exchange written financial disclosure to support fairness
• Consider including a clause on alternative dispute resolution (e.g., mediation before litigation)
• Coordinate the agreement with a notarial will and mandate

Conclusion

Quebec law provides de facto spouses with no automatic rights to property division, support, or inheritance, regardless of how long the couple has lived together. As a result, cohabitation agreements are not merely helpful, they are often essential to provide financial clarity and legal protection.

These agreements are enforceable as private contracts under Quebec civil law and can cover a wide range of financial and personal matters. For maximum certainty, couples should ensure the agreement is in writing, ideally notarized, and supported by complementary estate planning.

You’re Invited to Call or E-Mail!

If you’re considering a cohabitation agreement — or have already made your decision — you’re invited to call or email us. We’ll explain for free how you can protect your assets and plan your estate. You can call us toll-free at (800) 407-2570 or email us using our contact form here. We can help you anywhere in Ontario, including Ottawa, Toronto, Mississauga, Brampton, and Hamilton.