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Property Clauses in a Separation Agreement in Ontario

Learn what the property section of an Ontario separation agreement should cover: equalization, the matrimonial home, debts, excluded property and releases.

Family Law6 min readTSLBy the Treadstone Law Team · OntarioUpdated October 28, 2026
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Key takeaways
  • The default rule is that the spouse with the lesser net family property is entitled to one-half the difference between the two net family properties.
  • Net family property is the value of what a spouse owns on the valuation date, less debts and liabilities, with certain excluded property left out.
  • A matrimonial home is treated differently from other property, both for exclusions and for the marriage-date deduction.
  • Your agreement should say clearly what each spouse keeps, who pays which debts, and what each spouse is giving up.

When a couple separates and wants to settle things themselves, the property section of the separation agreement is usually the heart of the deal. It sets out who keeps what, who pays what, and whether anyone owes the other an equalization payment.

A vague or incomplete property section is a common source of later disputes. This article walks through what that section generally needs to cover, so you can go into negotiations knowing the questions to ask and when to get a lawyer to review the wording.

Start with the default rule: equalization

Ontario's Family Law Act sets a starting point for married spouses. The spouse with the lesser net family property is entitled to one-half the difference between the two net family properties. Your agreement can follow that rule, change it, or deal with it in some other way, but you should know what the default would be before you negotiate.

Net family property is the value of all the property a spouse owns on the valuation date, except excluded property, less debts and liabilities. So each spouse's figure is built from the same pieces: what they own, what is excluded, and what they owe.

A good property clause usually states the valuation date used, lists the assets and debts counted for each spouse, shows the resulting net family property figures, and states the equalization payment, if any, and when it is to be paid.

Excluded property and the marriage-date deduction

Some property is left out of the calculation. Property acquired by gift or inheritance from a third person after the date of marriage is excluded, but that exclusion does not apply to a matrimonial home. Property the spouses have agreed in a domestic contract is not to be included is also excluded. Be precise about any property you agree to leave out.

A spouse can also deduct the value of property, other than a matrimonial home, that they owned on the date of marriage. One trap is counting the same asset twice. The same property cannot be both an excluded amount and a marriage-date deduction, because counting it in both places double-counts it in that spouse's favour.

If the agreement relies on an exclusion, it should say what the property is, why it is excluded and what value, if any, is being claimed. Whether a particular asset qualifies can turn on the facts, such as where the money came from and where it went, so this is worth confirming with a lawyer.

Dealing with the matrimonial home

A matrimonial home is property in which a person has an interest and which the person and spouse ordinarily occupied as their family residence at separation. It gets special treatment. If property a spouse brought into the marriage is still the matrimonial home at separation, that spouse cannot deduct its marriage-date value. If it was sold before separation, the marriage-date value is deductible.

Money from a gift or inheritance can also be treated differently depending on whether it went into the home. In one Court of Appeal decision, depositing such money into a joint bank account did not by itself make it lose its excluded character, and the court treated that differently from money put into a matrimonial home.

Your agreement should say clearly what happens to the home. Common options are:

Be careful with open-ended arrangements. If joint owners cannot agree later, a joint tenant has a prima facie right to force a sale under s. 2 of the Partition Act, and the party resisting a sale must show the other is acting in a malicious, vexatious or oppressive fashion. Writing the plan down avoids relying on that.

Debts, accounts and releases

Debts reduce a spouse's net family property, so the agreement should list them and say who is responsible for each one. Naming the debt is not always enough, so think about how each debt will be paid off, refinanced or transferred. How a lender is affected depends on your situation, so it is worth confirming with a lawyer.

TopicWhat the clause should say
Bank and investment accountsWhich accounts each spouse keeps, and the values being used
Pensions and retirement savingsHow each is valued and whether any transfer is part of the deal
Vehicles and household goodsWho keeps what, and whether values are counted
Credit cards, loans, lines of creditWho pays, and whether joint accounts will be closed
Business interestsHow the value is determined and who gets a copy of the valuation
ReleasesWhat each spouse gives up, and which claims remain open

A release is a statement that a spouse gives up certain claims against the other. Releases are powerful, so they should match what you actually agreed. Check the wording closely and ask what is and is not covered.

Fairness, disclosure and what to do next

Courts can vary the equal share under the Act only if equalizing would be unconscionable. That threshold is high, and mere unfairness is not enough. Courts can also set aside a domestic contract in certain circumstances, but that is a two-step process and not automatic. The practical lesson is to get the agreement right at the start rather than count on fixing it later.

Time limits, tax consequences and how to value certain assets depend on your facts, so a lawyer or accountant can confirm them for your situation.

Frequently asked questions

Does a separation agreement have to follow the equalization rule?

No. The Act's default is that the spouse with the lesser net family property is entitled to one-half the difference. Spouses can agree to something different, but a lawyer should explain what you are giving up before you sign.

Is an inheritance included in the property split?

Property acquired by inheritance from a third person after the date of marriage is generally excluded, but not if it is a matrimonial home. Whether it can still be traced and excluded depends on what happened to the money.

What happens to the house if we cannot agree?

A joint tenant has a prima facie right to force a sale under the Partition Act, and the other owner must show the request is malicious, vexatious or oppressive. Putting a clear plan for the home in your agreement avoids that fight.

Can I change the agreement after I sign it?

Setting aside a domestic contract is a two-step process: you must show a statutory circumstance applies, and then the court decides whether to exercise its discretion. It is not automatic, which is why reviewing the draft first matters.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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