Common Law Property Division Ontario: Why You Don't Get Equalization

If you've been living with your partner for years and assume you'll get the same property rights as a married couple when you separate — you won't. Ontario's Family Law Act equalization system applies exclusively to legally married spouses. Common-law partners are shut out entirely.

This surprises people, especially those who've lived together for a decade or more, raised children, and built what feels like a shared financial life. But the legal reality is stark: in Ontario, there's no automatic right to split property when a common-law relationship ends.

What Common-Law Partners Don't Get

Under the Family Law Act, the Net Family Property equalization system — where each spouse calculates the growth of their net worth during the relationship and the wealthier spouse pays half the difference — does not apply to common-law couples. Period.

This means:

• No automatic right to share in property appreciation during the relationship
• No matrimonial home protections (neither partner has an equal right to stay in the home based solely on relationship status)
• No formal equalization payment mechanism
• No statutory requirement for financial disclosure

Each partner keeps what's in their name. If your partner's name is on the house, the investments, and the vehicles — and yours isn't — you walk away with nothing unless you can establish a claim through the courts.

The Legal Routes That Do Exist

Common-law partners aren't completely without options, but the available remedies are significantly harder to establish than the automatic equalization married couples receive.

Constructive trust. If you contributed financially or through labour to a property held in your partner's name — paying the mortgage, renovating the home, contributing to the down payment — you can argue that a constructive trust should be imposed, giving you a beneficial interest in the property proportional to your contribution.

Unjust enrichment. If your partner was enriched (their wealth grew), you were correspondingly deprived (your wealth didn't grow because your resources went to the relationship), and there was no legal reason for that imbalance, a court can order compensation. This is the most common claim in common-law property disputes.

Resulting trust. If you provided the purchase money for a property but title was put in your partner's name, you may be able to argue that your partner holds the property in trust for you.

All three of these remedies require you to go to court, prove your case with evidence, and bear the litigation costs. There's no streamlined administrative process — each claim is fact-specific and outcome-uncertain.

What About Child and Spousal Support?

Property division is the area where the gap between married and common-law is widest. For support, the rules are more equal:

Child support applies the same way regardless of marital status. Both biological parents owe child support under the federal Divorce Act (if married) or Ontario's Family Law Act (if common-law), using the same Child Support Guidelines tables.

Spousal support is available to common-law partners who have lived together continuously for at least three years, or who have a child together and are in a relationship of "some permanence." The Spousal Support Advisory Guidelines (SSAG) apply the same formulas as for married couples.

Protecting Yourself in a Common-Law Relationship

The most effective protection is a cohabitation agreement — a written contract that addresses property division, support obligations, and the home if the relationship ends. Like separation agreements, cohabitation agreements should be reviewed with independent legal advice by each partner.

If you're already separating, documenting your financial contributions to jointly used assets — mortgage payments from your account, receipts for renovations, records of your down payment contribution — is essential for any constructive trust or unjust enrichment claim.

Understanding Your Options

Whether you're married or common-law, understanding what you're entitled to is the first step. For married spouses navigating Ontario's NFP equalization system, the Ontario Divorce Financial Split Guide provides structured worksheets and step-by-step calculation templates to map out the property division process.

See more Ontario guides →