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Family

What Should a Cohabitation Agreement Cover in Ontario?

TSL Written by the Treadstone Law Team· Updated November 1, 2026

A cohabitation agreement in Ontario can cover your rights and obligations during cohabitation, on separation or on death. Under the Family Law Act, that includes ownership or division of property, support, the education and moral training of your children, and any other matter in settling your affairs. Two unmarried people who are cohabiting or intend to cohabit can make one.

A useful checklist starts with who owns what and how property and debts will be divided, how support will work if you separate, and what should happen on death. Debts, the family home and business interests are worth naming specifically, because the law allows an agreement to deal with any matter in settling your affairs. An agreement cannot fix decision-making responsibility or parenting time for children.

Some terms may not hold up. A court may set aside a support waiver where it results in unconscionable circumstances, and may disregard an unreasonable child support term. If you later marry, the agreement is deemed to be a marriage contract. A lawyer can help you tailor the list to your situation.

Key takeaways

  • A cohabitation agreement can set your rights and obligations during cohabitation, on separation or on death, including property and support.
  • It can also deal with the education and moral training of your children and any other matter in settling your affairs.
  • It cannot fix decision-making responsibility or parenting time for children.
  • A court may set aside a support waiver that results in unconscionable circumstances.
This is general information, not legal advice. It doesn’t create a lawyer–client relationship, and the rules can change. For advice on your situation, a Treadstone family lawyer can help.

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Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

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