The Common-Law Myth: What Rights Do Ontario Couples Actually Have on Separation in 2026?
Book Consultation Book Consultation
24
MarThe Common-Law Myth: What Rights Do Ontario Couples Actually Have on Separation in 2026?
There is a financially damaging myth circulating in Brampton, Mississauga, and across Ontario: “If we live together long enough, we are basically married. If we break up, everything gets split 50/50.”
In 2026, this is false — and acting on it is one of the most expensive mistakes an Ontario resident can make at separation.
Common-law partners in Ontario do not have the same property rights as married spouses. There is no automatic equalization of assets, no statutory right to a share of a partner’s home, and no 50/50 split of wealth accumulated during the relationship. Property goes to whoever holds legal title — unless the other partner can prove an unjust enrichment claim in court.
This guide explains what rights common-law couples in Ontario actually have on separation in 2026 — on property, support, and children — and precisely when the complexity of those rights requires a family lawyer. For a direct comparison of how married and common-law rights differ across every category, see our guide to common-law vs. married property rights in Ontario.
How Long Do You Have to Live Together to Be Common-Law in Ontario?
This is one of the most searched questions in Ontario family law — and the answer depends on what you are trying to establish.
For tax purposes, the Canada Revenue Agency treats couples as common-law partners after one year of cohabitation, or immediately if they have a child together.
For spousal support under the Family Law Act, the threshold is higher. Section 29 of the Act defines a “spouse” eligible to claim support as someone who has cohabited continuously for at least three years, or who is in a relationship of some permanence and has a child together with the other person.
For property rights, there is no qualifying period at all — because common-law partners have no statutory property rights regardless of how long they lived together. The length of cohabitation is relevant only to an unjust enrichment claim, where it serves as evidence of the nature and extent of the contribution.
The practical result: a couple that lived together for two and a half years with no children has no right to spousal support and no statutory property claim under Ontario law. They are, legally, two individuals who shared accommodation.
Do Common-Law Partners Have Property Rights in Ontario?
No automatic rights — and this is the area where common-law partners are most vulnerable on separation.
When a legally married couple divorces in Ontario, they go through the equalization of net family property under Part I of the Family Law Act. The wealth accumulated during the marriage is calculated and shared; the matrimonial home is treated as a joint asset regardless of whose name is on the deed.
For common-law couples, none of that applies. Ontario property law applies what is sometimes called the rule of absolute ownership: property belongs to the person whose name is on title, the account, or the registration. If the house is solely in your partner’s name, it is their house. If the RRSP is in your name, it is your RRSP. If you bought a car and put it in your partner’s name, it is legally their car. On separation, each person takes the assets registered in their name, and the law imposes no obligation to share anything further.
This is true even after a decade of cohabitation. It is true even if one partner paid the mortgage while the other was on title. It is true even if the couple treated everything as shared throughout the relationship.
What Is Unjust Enrichment and How Does It Apply to Common-Law Separation?
Unjust enrichment is the legal doctrine that allows a common-law partner to claim a share of assets they do not legally own, by proving that the other partner was enriched at their expense without a legal justification for keeping that benefit.
The framework was confirmed by the Supreme Court of Canada in Kerr v. Baranow [2011] 1 SCR 269, which remains the leading authority on common-law property claims in Canada. To succeed in an unjust enrichment claim, the claimant must prove three things: that they provided a benefit to the other person (paying toward a mortgage, performing unpaid labour in a business, giving up employment to raise children), that they suffered a corresponding deprivation (depleted savings, forgone pension contributions, reduced earning capacity), and that there is no legal reason for the other person to retain the benefit without compensating them.
Where the relationship involved a true partnership — shared finances, joint decisions, intertwined economic lives — a court may find a Joint Family Venture and award a proportionate share of the wealth accumulated during the partnership. Where the claim is narrower, the remedy may be a monetary award rather than an interest in specific property.
The critical difference from marriage: a married spouse receives equalization automatically unless the court orders otherwise. A common-law partner must initiate litigation, bear the burden of proof, and establish every element of the claim on the facts of their specific relationship. It is not automatic, it is not cheap, and it is not guaranteed.
What Are Common-Law Spousal Support Rights in Ontario?
Spousal support for common-law partners who meet the section 29 threshold — three years of cohabitation, or a child in a relationship of some permanence — is calculated using the same Spousal Support Advisory Guidelines (SSAGs) that apply to married spouses. The marital status distinction largely disappears once the threshold is met.
Courts assess entitlement by looking at whether the relationship created an economic disadvantage for one partner (a career paused to raise children, a move that disrupted employment, a business supported at the expense of the other partner’s income growth). Amount and duration are calculated based on the income difference between the parties and the length of cohabitation, following the SSAGs ranges. A long relationship with a large income gap can produce support obligations comparable to those arising from a marriage of similar length.
The distinction that remains: the three-year cohabitation or child requirement. A couple below that threshold has no statutory support claim, regardless of the economic imbalance the relationship created. Our detailed guide to spousal support entitlement and duration in Ontario covers how courts calculate amounts and how long obligations typically run.
Do Common-Law Partners Have Equal Parenting and Child Support Rights?
Yes — completely. Parental status under Ontario family law is entirely separate from marital status.
Children of common-law relationships have the same rights as children of married couples in every respect. Child support is calculated identically under the Federal Child Support Guidelines, based on the payor parent’s income and the parenting schedule. Decision-making responsibility and parenting time (formerly custody and access) are determined solely on the best interests of the child under the Children’s Law Reform Act — the parents’ marital status is not a factor.
A common-law parent has the same right to apply for parenting time and decision-making responsibility as a married parent, and the same obligation to pay child support based on income. Our guide to child support calculation in Ontario covers the Guidelines calculation in detail.
When Do Common-Law Couples in Ontario Need a Family Lawyer?
Common-law couples who rented, kept finances separate, earned comparable incomes, and have no children can often separate without significant legal intervention. For most other situations, the complexity of asserting — or defending — common-law rights requires legal counsel. Contact a family lawyer immediately if any of the following apply:
One partner owns the home the couple lived in. A common-law partner whose name is not on title has no statutory right to remain in the property or to prevent a sale. Unlike married spouses who have automatic possession rights to the matrimonial home under the Family Law Act, a common-law partner can, in the absence of court intervention, be excluded from the property. A lawyer can move quickly to file an unjust enrichment claim and seek an injunction preventing disposition of the asset while the claim is resolved.
A cohabitation agreement was signed. Cohabitation agreements are not automatically bulletproof. If the agreement was signed without independent legal advice, without full financial disclosure, or under circumstances that amounted to undue pressure, it may be vulnerable to challenge. Do not assume a signed agreement forecloses all claims — have it reviewed before accepting its terms.
One partner was the primary caregiver. A partner who paused or permanently altered their career trajectory to manage the household or raise children is at a significant financial disadvantage on separation. There is no automatic pension-splitting or property equalization to offset that contribution. A lawyer is required to build the unjust enrichment or Joint Family Venture claim and to establish the support entitlement that compensates for the economic sacrifice the relationship created.
A business was built during the relationship. If one partner contributed to the other’s business — administratively, operationally, financially, or by freeing the other partner to focus on it — that contribution may ground a Joint Family Venture or unjust enrichment claim against the business’s value. Valuing a private corporation and extracting a share of that value requires specific legal and accounting expertise.
The relationship involved significant shared debt. Common-law partners are generally not automatically liable for each other’s debts, but jointly held debt, jointly guaranteed obligations, or debt arrangements that are intertwined with property claims all require careful legal analysis on separation.
Our family law team advises common-law partners in Brampton and across the GTA on property claims, support entitlement, and the full range of separation issues specific to unmarried couples.
Frequently Asked Questions
What property rights does a common-law partner have in Ontario?
None automatically. Common-law partners in Ontario have no statutory right to equalization of property or to a share of assets held in the other partner’s name. Property belongs to whoever holds legal title or registration. A claim to a share of the other partner’s assets must be made through unjust enrichment or constructive trust, which requires proving a specific contribution and corresponding loss in court.
How long do you have to live together to be common-law in Ontario?
For spousal support purposes under the Family Law Act, three years of continuous cohabitation — or a shorter period if the couple has a child together in a relationship of some permanence. For tax purposes under the Income Tax Act, one year. There is no cohabitation period that triggers automatic property rights — those do not exist for common-law partners regardless of the relationship’s length.
Can a common-law partner claim spousal support in Ontario?
Yes, if the three-year cohabitation threshold (or child requirement) under section 29 of the Family Law Act is met. Support is calculated using the same Spousal Support Advisory Guidelines that apply to married spouses, based on income difference and length of cohabitation.
What is a cohabitation agreement in Ontario and is it enforceable?
A cohabitation agreement is a domestic contract under Part IV of the Family Law Act that allows common-law partners to define their property and support rights in the event of separation. It is generally enforceable if both parties received independent legal advice, had full financial disclosure, and signed without duress. An agreement signed without independent legal advice is significantly more vulnerable to challenge.
Does a common-law partner have rights to the house if they are not on the title?
Not automatically. If the home is registered solely in the other partner’s name, the non-titled partner has no statutory possessory or ownership right. However, they may have an unjust enrichment or constructive trust claim if they contributed to the property’s acquisition, maintenance, or improvement — and a lawyer can seek interim court relief to prevent the home from being sold or encumbered while that claim is litigated.
Are child support and parenting rights the same for common-law couples in Ontario?
Yes, entirely. Parental rights and obligations under the Federal Child Support Guidelines and the Children’s Law Reform Act apply equally regardless of whether the parents were married or common-law. Child support is calculated the same way; parenting time and decision-making responsibility are determined by the same best-interests-of-the-child standard.
Final Takeaway
The rights of common-law partners in Ontario in 2026 are not zero — but they are not automatic, and they are not the same as married spouses’ rights. Assuming you have no claim is a mistake. Assuming you will automatically receive a fair share is an equally costly one. If your relationship involved a shared home, a business, a career sacrifice, or significant financial intertwining, the rights available to you require active legal assertion. Book a free consultation with GS Arora Law before you sign anything, vacate any property, or reach a settlement.
Disclaimer: The information provided in this blog is for general informational purposes only and should not be considered legal, tax, financial, or professional advice. Regulations and procedures may change over time and vary by jurisdiction. For guidance tailored to your specific situation, please consult a qualified professional.
GS Arora, Lawyer & Notary Public. Brampton, Ontario.