Cohabitation Agreement Toronto

Moving in with a partner is one of the most significant commitments you can make — and one that carries real financial and legal consequences in Ontario. Common-law couples do not have the same automatic property rights as married spouses, but they may develop rights depending on the situation.

At Soica & Associates, our family lawyers help common-law couples create clear, fair, and legally enforceable cohabitation agreements that protect both partners and prevent costly disputes.

What Is a Cohabitation Agreement in Ontario?

A cohabitation agreement is a legally binding written contract between two people who are living together — or planning to live together — in a conjugal relationship. It sets out how property, finances, and other matters will be handled both during the relationship and if the relationship ends. It is sometimes described as a ‘prenuptial agreement for common-law couples,’ and a prenuptial agreement lawyer Toronto can prepare one for you whether you plan to marry in the future or not.

Unlike married spouses, common-law partners in Ontario are not automatically entitled to an equalization of property accumulated during the relationship under the Family Law Act. A cohabitation agreement gives common-law couples the ability to define their own financial arrangement — providing the legal clarity and protection that Ontario’s default rules do not automatically offer.

What Can a Cohabitation Agreement Cover?

A well-drafted cohabitation agreement can address:

• Property owned before the relationship. Confirming which assets each partner owned before moving in together and ensuring they remain separate property if the relationship ends.
• Property acquired during the relationship. Defining how property accumulated together — including a jointly purchased home, shared savings, or jointly titled assets — will be divided on separation.
• The shared home. Addressing what happens to the home you share — whether owned by one partner, purchased jointly, or rented — including possession rights and financial arrangements on separation.
• Spousal support. Establishing or limiting spousal support obligations between common-law partners, or defining the circumstances under which support would be appropriate.
• Financial contributions and expenses. Clarifying how household expenses, shared purchases, and financial contributions will be handled during the relationship.
• Debt Planning. Addressing how existing and future debts will be treated and who is responsible for what.
• Business interests. Protecting a business owned by one partner from claims by the other if the relationship ends.
• Estate planning. Given that there are no automatic property rights, it is important to address estate planning in a Cohabitation Agreement.

Does a Cohabitation Agreement Convert to a Marriage Contract?

Yes — and this is an important and often overlooked provision of Ontario’s Family Law Act. A cohabitation agreement automatically becomes a marriage contract if the parties subsequently marry, without requiring any additional steps. This means the protections you put in place before or during cohabitation continue to apply after the wedding.

However, it is always advisable to review your cohabitation agreement prior to the wedding date to ensure it still reflects your current circumstances and intentions. Life changes — new assets are acquired, financial situations evolve, and the terms that made sense at the beginning of cohabitation may need updating.

Requirements for a Valid Cohabitation Agreement in Ontario

• Must be in writing — verbal agreements between cohabiting partners are not legally enforceable in Ontario
• Signed and witnessed — both partners must sign the agreement in the presence of a witness
• Full financial disclosure — both partners must disclose their financial circumstances — assets, debts, and income — before signing. Inadequate disclosure is a primary basis for challenging an agreement.
• Independent legal advice — each partner should have their own lawyer review the agreement and provide independent legal advice before signing. This significantly strengthens enforceability and ensures both parties fully understand what they are agreeing to.

It is never too late to put a cohabitation agreement in place. Even if you have been living together for years, an agreement can still address current and future arrangements and prevent costly disputes if the relationship ends.

Why Common-Law Couples Need a Cohabitation Agreement

Many people mistakenly believe that after living together for a certain number of years, they automatically acquire the same rights as married spouses — sometimes called ‘common-law marriage.’ This is a myth in Ontario. Common-law partners do not automatically share in each other’s property, regardless of the length of the relationship, financial contributions, or whether they have children together.

Without a cohabitation agreement, if the relationship ends, a common-law partner who contributed financially to property owned in the other’s name may need to pursue a trust claim or unjust enrichment claim through the courts to recover anything. These claims are expensive, uncertain, and emotionally exhausting. A cohabitation agreement eliminates this risk by defining each partner’s rights from the outset.

For a full overview of property rights for common-law couples in Ontario, see our Common Law page.

Cohabitation Agreements vs. Marriage Contracts

A cohabitation agreement and a marriage contract serve the same general purpose — defining the financial relationship between partners — but apply to different relationship statuses. A cohabitation agreement applies to common-law couples; a marriage contract applies to married or soon-to-be married couples. As noted above, under Ontario law, a cohabitation agreement automatically converts to a marriage contract on marriage.

Both types of agreements require the same essential elements: they must be in writing, signed, witnessed, supported by full financial disclosure, and each party should have independent legal advice. A prenuptial agreement lawyer Toronto can advise on which type of agreement is appropriate for your situation and draft an agreement that provides complete protection.

Costs and Timelines

Timeline: A straightforward cohabitation agreement can be finalized in 2–4 weeks.

Complex agreements (joint property purchases, business interests, significant assets): 3–8 weeks.

Legal costs: Typically $1,500–$2,500 per party for drafting, execution and providing you with an Independent legal Advise Certificate.

→ A cohabitation agreement costs far less than litigation if the relationship ends without one.