Cohabitation Agreements in Ontario: Essential Tips & Advice.
Moving in together? Don't leave your financial future to chance. Learn how a 'Common Law Prenup' protects your property and automatically evolves if you decide to marry.
Draft Your Cohabitation AgreementLegal Review: This contract guide was reviewed by Deepa Tailor, Senior Family Lawyer, to ensure compliance with Part IV of the Family Law Act regarding domestic contracts.
The Quick Answer: Why Do I Need One?
A Cohabitation Agreement is a legal contract for unmarried couples that dictates how assets, debts, and spousal support will be handled if they separate. Since common law couples in Ontario do not have automatic property rights, this agreement is crucial for protecting your home and business from 'Unjust Enrichment' claims. A key benefit is that if you later marry, the Cohabitation Agreement automatically becomes a Marriage Contract, providing long‑term protection.
Top 3 Reasons to Sign
House Ownership.
If only one person is on the title, the agreement clarifies that the other person gains no equity, even if they contribute to bills/repairs.
Income & Assets.
Protects your business or pension from "Joint Family Venture" claims where an ex demands a share of the value growth.
Spousal Support.
You can pre-determine or waive spousal support obligations, providing certainty if the relationship ends.
The "Conversion" Clause
Moving In (Common Law)
When you move in together, you are considered "Common Law." During this phase, Ontario law is vague on property rights for unmarried couples. A Cohabitation Agreement fills that gap, clearly defining who owns what and preventing expensive Constructive Trust litigation if the relationship ends.
Getting Married
Under the Family Law Act, a valid Cohabitation Agreement transforms into a Marriage Contract (Prenup) the moment you wed. You do not need to sign a new document. This makes it a smart long‑term investment that evolves with your relationship automatically.
How to Make It Enforceable
In Writing & Witnessed
It cannot be an oral agreement. It must be signed by both parties and witnessed.
Financial Disclosure
You must attach a schedule of all assets and debts (Form 13.1). Hiding money voids the contract.
Independent Legal Advice (ILA)
This is non‑negotiable. If your partner doesn’t have their own lawyer explain the “bad deal” they might be signing, a judge will throw it out.
No Duress
Do not sign it the day you move in or the day of the wedding. Sign it well in advance.
Cohabitation Contract FAQs
Deepa Tailor
Senior Family Lawyer
Deepa Tailor drafts robust cohabitation agreements that provide clarity and security for unmarried couples, preventing expensive 'constructive trust' litigation down the road.
View Full BioMoving In? Protect Your Assets First.
A Cohabitation Agreement is the smartest investment you can make before sharing a home. Get it right the first time.
Draft Your Cohabitation Agreement