What is a Separation Agreement? A Complete Guide

Sep 11, 2026

When you’re considering separation in Ontario, you are facing a lot of challenges. Separation is an emotional time, and you may be worried about both your present and future life. If you have children, you want to provide the best life for them. They might want to know what their lives will look like after you separate.

You may have property you want to keep, and you may be concerned about support. This is where a separation agreement in Ontario can be advantageous.

At Kelly Jordan Family Law, we support many clients with the preparation of separation agreements, from simple divorce cases to high-net-worth divorces involving businesses, investments and complex financial arrangements. We help clients understand their rights and work towards practical agreements for their families.

Creating a Separation Agreement is often the first step when a marriage breaks down. You can create an agreement on your own, negotiate with lawyers or work together through mediation.

A properly prepared Separation Agreement is a legal document that outlines your agreement with respect to parenting, child and spousal support and property division.

Difference between Separation and Divorce

Separation is when a married or cohabiting (common law) couple’s relationship ends, and they begin living separate and apart. There is no formal process for separating in Ontario; you simply choose to live “separate and apart.” If you are cohabitating, separation effectively ends the relationship.

If you are married, you need a Divorce Order to legally end the marriage.

Divorce is covered by federal laws in Canada. Under the Divorce Act, living separate and apart for at least one year is the most common basis for divorce.

While there is a legal process to end a marriage (Divorce), a Separation Agreement can resolve issues that may otherwise need to be addressed during divorce proceedings. You do not have to divorce simply because you separate, but you must be divorced before remarrying. Divorce can affect property claim deadlines and other rights, so obtain advice before deciding when to proceed.

Separation In Ontario

Here are a few facts about separation in Ontario:

You do not need to “file for separation” – you simply need to begin living separate and apart, which can sometimes happen under the same roof.
There are important definitions of separation between Ontario Family Law and Federal Tax Regulations that could affect your finances.
Separation does not have a time limit – you can be separated indefinitely. You can be separated while married, but only a divorce ends the marriage.
You can be separated and live in the same house.
A Separation Agreement is not required, though it is strongly recommended.

When you separate – especially after a long relationship – there are many issues that need to be resolved. Working with an experienced lawyer can raise points you may not have even considered, and family mediation or negotiation can help you come to an agreement to move forward.

How To Get Separated In Ontario

If you are wondering how to get separated, signing an agreement is not what establishes your separation. One partner can decide to end the relationship without the other’s agreement, but this decision must be communicated to the other partner.

Being legally separated in Ontario depends on your circumstances, including whether you are living separate and apart. Record your separation date, gather financial documents and seek advice about immediate parenting, housing and support arrangements.

What Should A Separation Agreement In Ontario Include?

An Ontario separation agreement should explain both what you have agreed to and how those arrangements will work.

The issues that should be addressed in a separation agreement depend on your circumstances. Some examples of issues that may be addressed in a separation agreement include:

Parenting: Parenting time, holidays, decision-making responsibility, communication and travel arrangements.
Child support: Payments under the applicable guidelines, special or extraordinary expenses, and income updates.
Spousal support: Whether support is payable, its amount and duration, and any review terms.
Property: The family home, investments, pensions, business interests and any equalization payment.
Debts: Responsibility for mortgages, loans, credit cards and other liabilities.
Future disagreements: A process for reviewing arrangements and resolving disputes.

Parenting arrangements must reflect the children’s best interests. Child support is the child’s right, and an enforceable agreement cannot simply remove that entitlement.

For married spouses, property division usually involves equalizing net family property, and is not as simple as dividing every asset in half. Read our guide to property division in divorce in Ontario for more detail.

Advantages of a Separation Agreement for Cohabiting Couples (Common Law Relationships)

Common-law relationships are recognized for certain purposes in Ontario, but unlike marriage, there is no official process for either beginning or ending the relationship.

For purposes of spousal support, unmarried partners may qualify as spouses if they have lived together continuously in a conjugal relationship for at least three years, or have a relationship of some permanence and are parents of a child by birth or adoption.

Because there is no formal process to end a common-law relationship, a Separation Agreement can be the final step in resolving the issues arising from f your separation, including parenting, support and any property issues.

Since it is a legal document, a separation agreement can be enforced and used to avoid confusion when facing family law issues.

Common-law partners do not have the same automatic property equalization rights as married spouses. Ownership and potential property claims need individual consideration. Entitlement to spousal support is not automatic. Whether you qualify for support depends on your relationship and financial circumstances.

Financial Disclosure Before Signing

Both partners should exchange complete financial information before agreeing to financial terms. Relevant records may include, but are not limited to, tax returns, income statements, bank balances, debts, property valuations and pension information.

For business owners and families with substantial assets, corporate records and professional valuations may also be needed. Our high-net-worth divorce guide explains how these financial issues can affect settlement.

Disclosure helps you understand what you are agreeing to. Missing assets, understated income or overlooked debts can change whether a proposed settlement meets your needs.

Seek Legal Help with Your Separation Agreement

It’s advisable to have legal help when setting up your Separation Agreement. Each partner should retain their own lawyer to protect their individual rights.

You can build a Separation Agreement yourselves, or through a more formal process like mediation or negotiation.

If you create it yourselves, or use a template as a starting point, it is a good idea to have it reviewed by your lawyers before finalizing and signing. No family follows a template. A lawyer can help you customize your document to ensure it meets your unique family needs.

Remember that separation agreements are legally binding, so errors or mistakes could cause legal problems. Seeking legal advice before signing a separation agreement can help avoid these issues.

A separation agreement lawyer can explain proposed terms, identify missing provisions and assess the consequences of waiving rights. Read more about preparing a separation agreement without a lawyer.

What Makes The Agreement Legally Binding?

Ontario’s Family Law Act requires domestic contracts to be written, signed by both parties and witnessed. A court may set aside an agreement or provision for significant financial nondisclosure, failure to understand its nature or consequences, or other contractual grounds.

Independent legal advice helps each person understand their obligations before signing.

Enforcing Your Separation Agreement

A separation agreement does not need to be filed in court to be binding, but may need to be filed in court if there are issues with enforcement.

Support provisions can be filed with the court and registered with the Family Responsibility Office (FRO) for enforcement. FRO enforces child and spousal support, not parenting arrangements or every property provision. Ontario’s child and spousal support guidance explains the process.

Common Questions About Your Separation Agreement In Ontario

Can We Change The Agreement Later?

Agreed changes should be documented in a properly prepared written amendment. If you disagree, legal options depend on the provision and circumstances. Property settlements are intended to provide finality; support and parenting arrangements may require later review.

How Long Does It Take, And What Does It Cost?

Timing and cost depend on financial disclosure, the issues involved and how readily you reach agreement. Ask your lawyer about the work your circumstances require.

What If My Spouse Will Not Sign?

You cannot force a signature. Further negotiation or mediation may help, or court orders may be necessary to resolve outstanding issues.

Separating or Seeking Divorce? Contact the Kelly D. Jordan Family Law Firm

Whether you are considering mediation or want legal advice when you are separating or divorcing, the experienced family law team at the Kelly D. Jordan Family Law Firm is here to help. Contact us today, or start your family law case online.