If you’re in a common-law relationship in Ontario — or planning to move in together — it’s a good idea to enter into a cohabitation agreement. It might not sound romantic, but it’s one of the smartest things a couple can do to protect themselves financially if the relationship ends or one partner passes away. It’s a smart move to talk to a family law lawyer about creating this legal document to protect both partners financially and avoid future conflict.
Reasons to Make a Cohabitation Agreement
Common-law couples don’t have the same legal protections as married couples.
In Ontario, married spouses have specific rights to share in the value of property gained during the marriage. Common-law partners don’t have those automatic rights unless they make a legal agreement.
A cohabitation agreement protects your financial interests.
Without an agreement, if the relationship ends, one partner could walk away with everything in their name, even if the other contributed financially. A family law lawyer can help put clear protections in place.
You get legal clarity about who owns what.
Whether it’s a house, car, savings, or furniture, an agreement can say who brought what into the relationship and how new purchases will be divided. A family law lawyer can help draft an agreement that clearly outlines ownership and division of property.
It helps avoid legal battles if the relationship ends.
Breakups are hard enough. A cohabitation agreement lays out what happens to money and property, so you don’t end up in court arguing about who paid for what. Breakups are tough and the last thing anyone wants is a court fight. A properly drafted cohabitation agreement, backed by legal advice and financial disclosure, gives both parties a clear roadmap in case things don’t work out.
A cohab agreement clarifies what happens if one of you contributes to the other’s property.
If one partner pays for renovations on the other’s home, is that considered a gift, or does it give them a stake in the property? The agreement can make this clear. A lawyer can ensure the agreement addresses these kinds of situations in a legally sound way.
It can include financial details about children, retirement, and future plans.
While parenting time and decision making can’t be included, the agreement can deal with things like spousal and child support, contributions to savings, retirement plans, and what happens if one partner passes away.
A cohabitation agreement reflects your unique relationship.
Whether you want to keep everything separate or share everything equally, the agreement can be tailored to your personal situation.
If you get married later, a cohabitation agreement can carry over into a marriage contract
If you tie the knot down the road, your cohabitation agreement can become your marriage contract unless you specifically say otherwise in the original document.
It’s easier to talk about money before you move in.
Having the conversation upfront, before signing a lease or mortgage, helps set expectations and makes the process smoother. A lawyer can help guide the conversation and make sure everything is addressed before cohabitation begins.
Common Mistakes to Avoid With Your Cohabitation Agreement
Not getting legal advice.
DIY templates can be tempting, but they often don’t hold up in court. Each person should get independent legal advice to ensure the agreement is fair and enforceable. A one-sided or unclear agreement, or an agreement without the relevant financial disclosure, might not hold up in court.
Waiting too long.
It’s tempting to say “we’ll figure it out later,” but the longer you wait, the harder the conversation can become — especially once emotions and finances are tangled together.
Assuming common-law = married.
It doesn’t. In Ontario, common-law couples don’t automatically share property rights. The law doesn’t treat unmarried couples the same, so it’s important to put everything in writing. A lawyer can explain exactly what the law does and doesn’t cover.
Being too vague.
If one partner is paying the mortgage and the other is paying for groceries, spell that out. Clarity now avoids confusion later. Agreements need to be specific. A lawyer will ensure nothing is left open to interpretation.
Not providing full and relevant financial disclosure.
If either partner withholds important financial information — like debts, assets, or income — the agreement could be challenged in court later. Transparency is key to making it fair and enforceable.
Not updating the agreement when things change.
Life events like having children, receiving an inheritance, or buying property together should trigger a review. A lawyer can help revise the agreement to reflect your current reality.
Call Scharff Nyland Chambers LLP to Find Out What Your Rights Are and How To Protect Them in a Cohabitation Agreement
Even if you’re not ready to sign an agreement, a consultation with a family law lawyer can give you a better understanding of what your rights are and how to protect them.
A cohabitation agreement is about more than just preparing for a breakup; it’s about building trust, setting expectations, and giving both partners peace of mind. With the help of a family law lawyer, you can create an agreement that protects both of you and reflects the reality of your relationship.
At Scharff Nyland Chambers LLP, we help common law couples across Barrie, Collingwood, Wasaga Beach, and the GTA put together cohabitation agreements. Our family law lawyers are here to support you with legal advice and representation. Call 1-866-721-5851 or book a consultation today to get started on your agreement today.
***The information provided in this blog is for general informational purposes only and should not be construed as legal advice. If you have legal questions, we strongly advise you to contact us.
