Understanding Marriage and Cohabitation Agreements
A practical guide to planning, drafting and enforcing marriage and cohabitation agreements so couples can manage property, debt and support with clarity.
Marriage agreements and cohabitation agreements are powerful planning tools that allow couples to set their own rules about property, debts and support rather than relying only on default family laws. They are especially important in British Columbia, where the Family Law Act gives courts authority to enforce or set aside these domestic contracts when certain conditions are met.
1. What Are Marriage and Cohabitation Agreements?
At their core, a marriage agreement or cohabitation agreement is a private contract between two people in a romantic relationship. These agreements record promises about how financial and property issues will be handled while they are together and if they later separate or one partner dies.
In British Columbia and most of Canada, these contracts are often referred to as domestic contracts or marriage contracts in family law statutes. Although terminology can vary, the underlying idea is the same: the couple defines rights and obligations by agreement rather than leaving everything to provincial rules.
1.1 Marriage Agreements
A marriage agreement is used by people who are already married or who plan to marry. It can be signed before the wedding (similar to a prenuptial agreement) or after the wedding (sometimes called a postnuptial contract). In many provinces, including British Columbia, there is no legal requirement to have such an agreement; it is entirely optional.
- Can be signed before or after the wedding.
- Sets out rules about property, debts and sometimes spousal support.
- Cannot override certain statutory protections, such as core rights related to children.
1.2 Cohabitation Agreements
A cohabitation agreement is the equivalent contract for couples who live together but are not married. In Canada, these couples are often described as being in a common-law relationship once they meet specific criteria such as living together for a minimum period. The agreement allows them to set out how property and debt will be shared or divided, and may also address spousal support if the relationship ends.
- Used by unmarried couples who live together or plan to live together.
- Often mirrors the topics covered in marriage agreements, tailored to common-law rules.
- Can later be converted or supplemented by a marriage agreement if the couple marries.
2. Why Couples Use These Agreements
The main motivation for entering a marriage or cohabitation agreement is predictability and conflict prevention. Instead of leaving future disputes to be resolved by courts applying general statutes, couples can establish customized arrangements suited to their particular circumstances.
2.1 Managing Property and Debt
Provincial family laws, including British Columbia’s Family Law Act, contain default rules about what counts as family property, how increases in value are shared and how debt is divided when spouses separate. A marriage or cohabitation agreement allows couples to clarify or alter these defaults within the limits permitted by law.
- Define which assets are shared and which remain separate.
- Specify how the family home and other significant property will be treated at separation.
- Allocate responsibility for existing debts and future borrowing.
2.2 Addressing Spousal Support
Another common topic is spousal support (sometimes called alimony). Agreements often state whether support will be paid, in what circumstances, and potentially in what amounts or for how long. Courts may enforce these clauses if they are fair and consistent with legal principles, but can modify them if they lead to serious hardship or conflict with statutory obligations.
2.3 Protecting Pre-Existing Assets and Businesses
People entering second marriages, those with significant savings, or those who own businesses frequently use marriage agreements to protect their pre-existing property from unexpected claims if the relationship ends. For example, a business owner might want to ensure that business shares remain separate property and are not divided as family assets.
2.4 Providing Emotional Security
Beyond financial planning, these agreements can provide emotional and psychological security. By discussing difficult topics such as money, support and possible separation in advance, couples may reduce anxiety and strengthen mutual trust. The process of negotiation itself can reveal expectations and values that would otherwise remain unspoken.
3. What Can and Cannot Be Included
While marriage and cohabitation agreements can cover a wide range of financial matters, there are important limits on their scope. In British Columbia and other provinces, certain topics remain governed by legislation and cannot be fully contracted out of.
3.1 Common Topics Covered
Typical agreements address the following issues:
- Ownership and division of property acquired before and during the relationship.
- Allocation of debts, including credit cards, lines of credit and mortgages.
- Spousal support rights or waivers, within legal limits.
- Financial arrangements during the relationship, such as how expenses will be shared.
- How gifts, inheritances and business assets will be treated if the couple separates.
3.2 Legal Limits and Child-Related Matters
There are clear restrictions on what these agreements can accomplish. In Ontario, for example, marriage contracts cannot determine decision-making responsibility or parenting time for children, nor can they waive a child’s right to support. Similar principles apply in British Columbia, where child-related issues are governed by the Family Law Act and the best interests of the child standard.
As a general rule:
- Agreements cannot finalize custody or parenting time arrangements for children.
- Agreements cannot remove a child’s right to adequate financial support.
- Clauses clearly contrary to public policy or significantly unfair may be set aside by the court.
3.3 Comparison of Permitted and Restricted Topics
| Topic | Usually Allowed in Agreement | Usually Not Allowed or Limited |
|---|---|---|
| Division of property | Yes, within statutory limits on family property. | Cannot override certain core protections (e.g., matrimonial home rules in some provinces). |
| Allocation of debts | Yes, parties can decide how to share debts at separation. | Third-party lenders are not bound; they can still pursue either borrower. |
| Spousal support | Yes, agreements can include support or waivers. | Court may change terms if they cause serious unfairness or hardship. |
| Child support and parenting | Limited; parents may express intentions. | Cannot remove statutory rights; courts apply child-focused standards. |
4. Legal Requirements for Valid Agreements
To be enforceable, a marriage or cohabitation agreement must satisfy basic formal requirements and meet standards of fairness. In British Columbia, these contracts are recognized under the Family Law Act, but similar requirements are found across Canadian provinces.
4.1 Formal Execution Requirements
Most Canadian jurisdictions, including British Columbia, require the following for a domestic contract to be valid:
- It must be in writing, not just an oral understanding.
- It must be signed by both parties.
- The signatures must be witnessed by at least one person who is legally capable.
Some provinces impose additional requirements. In Quebec, for example, a marriage contract must be drawn up by a notary and signed in their presence. Elsewhere in Canada, couples generally sign in front of a witness and often have the agreement notarized to strengthen evidentiary reliability.
4.2 Full Financial Disclosure
Courts place significant emphasis on full and frank financial disclosure. Each party should provide accurate information about their income, assets and debts at the time the agreement is signed. Without such disclosure, a court may find that one partner could not properly assess the consequences of the agreement and may set it aside.
4.3 Voluntariness and Fairness
Equally important is that the agreement be entered into voluntarily, without pressure, manipulation or duress. If someone is coerced into signing or given very little time to review complex terms, the agreement is vulnerable to challenge. Courts may disregard or modify provisions that are oppressive or were obtained through unfair bargaining tactics.
4.4 Independent Legal Advice
While not always strictly mandatory, independent legal advice for each party is strongly recommended and often treated as a practical requirement. When each spouse has their own lawyer:
- They can understand exactly what rights they are gaining or giving up.
- Lawyers can ensure the agreement complies with local statutes and case law.
- The record of advice helps defend the agreement against later challenges.
5. Enforcing and Challenging Agreements
Once properly executed, a marriage or cohabitation agreement is normally binding between the parties. However, courts retain the power to review and, in some cases, set aside or vary these contracts. In British Columbia, the Family Law Act governs how judges assess domestic agreements when they are challenged.
5.1 When Courts Enforce Agreements
Courts are likely to enforce an agreement when:
- Both parties had full financial disclosure.
- Each party had (or was offered) independent legal advice.
- The agreement was voluntary and signed with adequate time for review.
- The terms are not unconscionable or drastically unfair.
5.2 Reasons Courts May Set Aside or Modify Agreements
Judges may refuse to enforce all or part of an agreement in situations such as:
- Lack of proper financial disclosure by one or both parties.
- Evidence of pressure, threats or significant power imbalance.
- Clauses that conflict with child support obligations or important statutory protections.
- Arrangements that lead to serious unfairness when applied years later.
5.3 Amending or Cancelling an Agreement
Couples’ circumstances can change, so agreements can be amended or revoked by mutual consent. Provincial family law statutes usually require similar formal steps for amendments as for original execution: written terms, signed by both parties, and witnessed. Updating the agreement can be appropriate when:
- Children are born or adopted.
- One partner starts or sells a business.
- The couple relocates to another province or country.
- Financial situations change substantially.
6. Practical Steps to Create an Agreement
For couples in British Columbia considering a marriage or cohabitation agreement, a structured approach can make the process smoother and more effective.
6.1 Discuss Goals and Expectations
The first step is an open conversation between partners about financial expectations and long-term plans. Topics might include:
- How you will share day-to-day expenses.
- Saving and investment strategies.
- Views on supporting each other if the relationship ends.
- Concerns about existing debts or business risks.
6.2 Prepare a List of Assets and Debts
Each person should assemble a clear list of their assets and liabilities, including real estate, vehicles, savings, pensions, loans and credit card balances. This information forms the basis of financial disclosure and helps the couple and their lawyers design fair terms.
6.3 Obtain Legal Advice
After outlining general ideas, partners usually consult family-law lawyers to draft the agreement. In British Columbia, organizations like People’s Law School provide public legal education about marriage and cohabitation agreements, but they recommend that each party receive independent legal advice before signing.
6.4 Sign and Store the Agreement Safely
Once finalized, the agreement should be signed following local formalities (including witnessing and, where applicable, notarization). Couples should keep original copies in a secure place and inform their lawyers of any planned changes.
7. Frequently Asked Questions
7.1 Do we have to sign a marriage agreement before getting married?
No. There is no legal requirement to have a marriage agreement in British Columbia or elsewhere in Canada. It is an optional planning tool, not a mandatory step in getting married.
7.2 Can I be forced to sign a cohabitation agreement?
No. A valid agreement must be voluntary. If someone is pressured or coerced into signing, a court may later set the contract aside or decline to enforce it.
7.3 Are prenups and marriage contracts really enforceable in Canada?
Yes. Properly drafted and executed prenups and marriage contracts are generally enforceable under Canadian family law. However, courts can intervene when disclosure was inadequate, there was duress, or terms are extremely unfair.
7.4 Can we write our own agreement without lawyers?
Couples technically can draft their own agreements. But without legal advice, there is a risk that the contract will later be found invalid or unenforceable. Independent legal advice for each party is strongly recommended.
7.5 What happens if we do not have any agreement?
If there is no marriage or cohabitation agreement, provincial family laws apply by default. In British Columbia, this means the Family Law Act governs division of family property and debt, and rules about spousal and child support.
References
- Marriage agreements and cohabitation agreements — People’s Law School (Dial-A-Law). 2023-06-01. https://dialalaw.peopleslawschool.ca/marriage-agreements/
- Premarital agreements 101: basics under Canadian law — Lexpert. 2023-02-15. https://www.lexpert.ca/news/legal-faq/premarital-agreements-101-basics-under-canadian-law/390745
- Marriage Contracts in Ontario — Stephen Durbin & Associates. 2022-10-10. https://www.stephendurbinandassociates.com/blog/marriage-contracts-in-ontario/
- Marriage contracts: Our advice — National Bank of Canada. 2022-09-01. https://www.nbc.ca/personal/advice/taxes-and-income/marriage-contracts.html
- Misconceptions about Marriage Contracts in Canada — CBES Law. 2021-11-05. https://cbelaw.com/misconceptions-about-marriage-contracts-in-canada/
- Marriage Contracts & Cohabitation Agreements — Heft Law. 2022-04-20. https://heftlaw.ca/practice-areas/family-law/marriage-contracts-and-cohabitation-agreements/
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