You’ve been with your partner for years. You share a home, maybe kids, finances — a whole life together. But you never officially tied the knot. Does the law treat you the same as a married couple?
The answer might surprise you — and it could have serious consequences if you don’t know where you stand. Across Ontario, from Toronto and Brampton to Sault Ste. Marie and Elliot Lake, many couples are caught off guard by the legal differences between common law relationships and legal marriage. Those differences directly affect your rights to property, inheritance, benefits, and what happens if the relationship ends.
What Is a Common Law Relationship?
A common law relationship — sometimes called a de facto relationship or domestic partnership — exists when two people live together in a committed, marriage-like relationship without a formal ceremony or marriage license.
Here’s where it gets complicated: the rules vary depending on where you live and what legal rights are at stake. In Ontario, common law partners who have lived together for at least three years — or who have a child together and have cohabited in some permanence — may acquire certain rights under the Family Law Act. However, these rights are more limited than those afforded to married spouses, and many Ontario couples in cities like Brampton, Mississauga, and Sault Ste. Marie are unaware of the gaps in their protection.
This inconsistency is why so many couples are caught off guard when a relationship ends or a partner passes away.
What Is Legal Marriage?
Legal marriage is a formal contract between two people, recognized by the state. It requires a license, a ceremony — civil or religious — and registration with the government. In return, married couples receive a clear, well-defined set of legal rights automatically.
Those rights include spousal inheritance, tax benefits, medical decision-making authority, access to a spouse’s pension or social security, and straightforward property division if the marriage ends. For couples in Ontario — whether in Toronto, Brampton, or smaller communities like Elliot Lake — marriage provides a legal safety net that common law status simply doesn’t replicate.
Key Differences Between Common Law and Marriage in Ontario
While the day-to-day of both relationships may look identical, the legal differences can be significant — particularly under Ontario law:
- Property rights — Married spouses in Ontario have automatic rights to equalization of net family property upon separation. Common law partners have no such automatic right; they must prove their financial contribution to claim a share of what they helped build, often through complex constructive trust claims.
- Inheritance — Without a will, a married spouse is first in line to inherit under Ontario’s Succession Law Reform Act. A common law partner may receive nothing, regardless of how long the relationship lasted.
- Separation — Married couples go through a formal divorce with legal protections for both parties. Common law couples in Ontario — from Toronto to Sault Ste. Marie — often have far fewer protections when splitting shared assets.
- Benefits and taxes — Marriage unlocks spousal tax benefits, health insurance, and government benefits. Common law couples may qualify for some of these after a period of cohabitation, but the rules are inconsistent.
- Children and parenting — Both married and common law parents have equal rights and responsibilities toward their children under Ontario’s Children’s Law Reform Act.
Does Living Together Long Enough Make You Common Law Married?
Most people assume that after a certain number of years — seven is the number you’ll hear most often — you’re automatically common law married. That’s largely a myth.
In Ontario, living together does not create a “common law marriage” in the traditional sense. While cohabiting couples may acquire some rights under the Family Law Act (particularly around spousal support), they do not gain the same automatic property rights as married spouses. This is a critical distinction that surprises many couples across the province — from downtown Toronto to communities like Elliot Lake and Brampton.
How to Protect Yourself If You’re Not Married
If you’re in a long-term relationship in Ontario but not legally married, here are practical steps to protect yourself:
- Draft a cohabitation agreement outlining property ownership and financial responsibilities
- Update your will to name your partner as a beneficiary
- Add your partner to insurance policies and financial accounts where possible
- Consult a family lawyer familiar with Ontario law to understand your specific rights
This is especially important in communities like Sault Ste. Marie and Elliot Lake, where access to legal resources may feel limited — but where the consequences of being unprotected are just as real as anywhere else in the province.
The Bottom Line
Common law and legal marriage may feel the same on the surface, but the legal protections they offer are often worlds apart under Ontario law. Assuming you’re covered just because you’ve been together for years is a mistake that can cost you — financially and emotionally — when it matters most.
Whether you choose to marry or not is personal. But understanding your legal standing isn’t optional. Atlantis Law Professional Corporation serves clients across Ontario, including Toronto, Brampton, Mississauga, Sault Ste. Marie, and Elliot Lake. Talk to a family law attorney and make sure your relationship — and everything you’ve built — is properly protected.
Disclaimer: This blog is for informational purposes only and does not constitute legal advice. Laws vary by jurisdiction. Consult a licensed family law attorney for guidance specific to your situation.
