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Does a Separation Agreement Make Us Legally Separated in Ontario?

Find out what being separated means in Ontario, whether signing an agreement changes your status, and why your date of separation matters.

Family Law4 min readTSLBy the Treadstone Law Team · OntarioUpdated October 28, 2026
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Key takeaways
  • For divorce purposes, spouses are treated as separate and apart when they live apart and at least one intends to live separately.
  • A separation agreement is not a divorce and is not a step the Divorce Act requires.
  • Your date of separation can affect property, spousal support and deadlines.
  • Whether people living under one roof count as separated depends on the facts, so ask a lawyer.

Couples often ask whether signing a separation agreement is what makes them legally separated. The short answer is that the agreement records your arrangements, but it is not the thing that starts or ends your separation, and it is not a divorce.

What tends to matter more is the date you separated. That date can feed into support calculations, property and deadlines. This article explains how separation is described in Ontario law and why the date is worth pinning down.

What separation means in law

Separation is mainly about how you live, not about a document. For divorce purposes, spouses are deemed to live separate and apart for any period when they lived apart and at least one of them intended to live separately. So the intention of even one spouse is part of the picture.

A separation agreement is a contract between spouses and is one of five kinds of domestic contract. It is not a divorce and is not a step the Divorce Act requires. In other words, you can be separated without an agreement, and signing an agreement does not end a marriage.

Separation, separation agreement and divorce compared

TermWhat it meansSource of the rule
Separation (for divorce purposes)Spouses are deemed separate and apart when they live apart and at least one intends to live separatelyDivorce Act s. 8(3)
Separation agreementA contract setting out your arrangements; not a divorceDomestic contract
DivorceGranted by a court on breakdown of the marriageDivorce Act s. 8

For a divorce, breakdown is generally established by living separate and apart for at least one year before the divorce is determined, with the spouses still separated when the proceeding began.

Trying again and living under one roof

If you try to reconcile, the one-year period is not interrupted by resumed cohabitation of up to 90 days that was aimed mainly at reconciliation. Longer periods of living together again may raise different questions.

Many couples cannot afford to move out right away. Whether spouses who share a home can be treated as living separate and apart depends on the facts, and for divorce purposes the Divorce Act looks at whether at least one of you intends to live separately. Because this turns on your circumstances, a lawyer can confirm how it applies to you.

Why your date of separation matters

The separation date is not just a formality. It can affect several things:

The Spousal Support Advisory Guidelines are often used in Ontario but are only guidelines. Because so much can turn on the date, it helps to agree on it in writing with your spouse, and to have the agreement state it.

Married and common-law couples

The Divorce Act applies to married spouses. Spousal support may be available to a spouse who was married, who lived with the other as a couple for at least three years, or who had a relationship of some permanence and a child together.

Property is treated differently. Married spouses must generally split property acquired during the marriage equally when it ends. Common-law couples are not legally required to split property acquired during the relationship, and each generally keeps what they bought. A cohabitation or separation agreement can set out property rights.

What to do next

Frequently asked questions

Is there a form I file to become legally separated?

Separation is mainly about how you live, and the Divorce Act counts spouses as separate and apart when they live apart and at least one intends to live separately. A separation agreement is optional and is not required for divorce. A lawyer can confirm what steps suit your situation.

Does signing a separation agreement end our marriage?

No. A separation agreement is not a divorce, and only a court can grant a divorce.

Can we be separated while living in the same house?

It can depend on the facts. The Divorce Act looks at whether spouses lived apart and whether at least one intended to live separately. A lawyer can tell you how that applies to your household.

What if we got back together for a while?

The one-year separation period is not interrupted by resumed cohabitation of up to 90 days aimed mainly at reconciliation. Longer periods are worth discussing with a lawyer.

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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