Common-law separation in Ontario requires no court filing — it is simply a factual state of living separate and apart with no reasonable prospect of reconciliation. What needs resolving is spousal support (available once you meet the Family Law Act's "spouse" definition), parenting and child support (identical rules regardless of marital status), and any property claims, typically through a separation agreement or, failing agreement, a family court application.
- There is no formal process to become separated as a common-law couple — it is a factual determination (living separate and apart, no reasonable prospect of reconciliation), not a court filing.
- Ontario's Family Law Act treats you as a “spouse” for support purposes after 3 years of continuous cohabitation, or sooner if you have a child together and a relationship of some permanence.
- That 3-year threshold is about support eligibility only — it has nothing to do with property rights, which follow a completely different, less favourable framework for common-law partners.
- Once you meet the “spouse” definition, you can be entitled to spousal support on the same general framework used for married spouses — compensatory, needs-based, or contractual entitlement, with the Spousal Support Advisory Guidelines as an advisory (not binding) tool.
- Parenting and child support are completely unaffected by marital status — the same best-interests standard and the same Child Support Guidelines apply whether or not the parents were ever married.
- The usual next step is negotiating a separation agreement covering support, parenting, and property — or, if that fails, applying to family court for the specific orders you need.
- Property is the one area where common-law partners are genuinely worse off than married spouses — see our dedicated guide on that topic rather than assuming the rules are the same.
The Short Answer
There is no “common-law divorce” process in Ontario, because there was no marriage to legally end. Separation for a common-law couple is simply a factual state — you are separated once you are living separate and apart with no reasonable prospect of reconciliation. No court filing, application, or certificate marks the moment it happens.
That doesn't mean nothing needs to be resolved. Depending on your circumstances, you may still need to sort out spousal support, parenting arrangements and child support if you have children together, and any property or debt claims between you. This guide focuses on the process of separating and on support and parenting specifically — the questions that are genuinely different (and often misunderstood) for common-law couples compared to married ones.
When You're “Common-Law” for Support Purposes
Ontario's Family Law Act generally recognizes a couple as “spouses” for support purposes once they have cohabited continuously for three years, or sooner if they have a child together and are in a relationship of some permanence. This is the threshold that determines whether a common-law partner can even make a claim for spousal support in the first place.
It's easy to assume that meeting this three-year mark gives you the same rights as a married spouse across the board. It doesn't. This threshold governs support eligibility only. Property division for common-law partners is a separate and much less automatic question, governed by different legal doctrines entirely — our guide on whether common-law partners split property when they break up covers that distinct topic in depth, so we won't repeat it here.
Spousal Support for Common-Law Partners
Here is the part that surprises a lot of people in a good way: once you meet the “spouse” definition above, a common-law partner can be entitled to spousal support in Ontario — assessed using essentially the same general framework used for married spouses. That is a meaningfully different, and more favourable, position than common-law partners occupy on property.
Entitlement to spousal support generally falls into one or more of three categories, regardless of whether the couple was married:
- Compensatory — support that addresses economic disadvantage arising from the relationship or its breakdown, such as leaving the workforce to raise children or support a partner's career.
- Non-compensatory / needs-based — support based on one partner's need and the other's ability to pay, independent of any specific economic sacrifice.
- Contractual — support arising from an agreement between the partners, such as terms set out in a cohabitation agreement.
If your relationship also involved an inheritance, a business, or other property one partner wants to keep clearly separate, a full and honest financial disclosure from both partners is just as important here as it is for married spouses negotiating a separation agreement.
The SSAGs are commonly used as an advisory tool to gauge a reasonable range for the amount and duration of spousal support. They are not a binding formula — a court is not required to follow them, and the actual outcome depends on the specific facts of the relationship, including its length, the presence of children, and each partner's income and circumstances.
A couple lives together for six years and has one child. One partner reduces their work hours significantly to care for the child while the other advances their career. On separation, the partner who scaled back working hours may have a compensatory support claim — the same type of claim a married spouse in the identical situation could raise, because entitlement here does not depend on marital status, only on meeting the cohabitation threshold.
Parenting and Child Support
This is one of the most important reassurance points in the entire topic: whether a child's parents were married has no bearing on parenting rights or child support. The legislation and the legal standard are identical either way.
- Decision-making responsibility and parenting time — governed by the Children's Law Reform Act, applying the same best-interests-of-the-child standard regardless of whether the parents were married, common-law, or never cohabited at all. Our guide on decision-making responsibility and parenting time in Ontario walks through how that standard is applied.
- Child support — calculated under the Federal and Provincial Child Support Guidelines based on income and the parenting arrangement, again applying identically regardless of marital status. See our guide on how child support is calculated in Ontario for the mechanics.
In other words, a parent who was never married to their child's other parent has exactly the same parenting rights and child support obligations as one who was. Nothing about the support or property discussion above changes this.
What Actually Needs to Happen
Because separation itself requires no filing, the real work starts with resolving the issues that are actually in dispute. There are generally two paths:
- Negotiate a separation agreement — a written contract covering spousal support, parenting arrangements, child support, and any property or debt issues between you. For it to hold up later, both partners should generally receive independent legal advice and provide full financial disclosure to each other, the same enforceability principles that apply to any domestic contract. See our guide on separation agreements for what a well-drafted one covers.
- Apply to family court — if the parties cannot agree, either partner can apply for a support order, a parenting order, or both. Mediation or other out-of-court approaches are also worth considering before litigation; our overview of mediation, arbitration, and litigation compares the options.
If you are at the very start of a common-law separation and not yet sure what you need, our general guide to first steps after separation covers the practical groundwork — documents, finances, and immediate decisions — that applies whether or not you were married.
What About Property?
Property is deliberately kept brief here because it is a genuinely distinct legal question with its own dedicated guide. In short: the Family Law Act's automatic equalization of net family property applies only to married spouses, and the special protections that apply to a matrimonial home in a marriage don't extend to common-law partners either. Common-law partners pursuing a share of property rely on different equitable doctrines rather than an automatic entitlement. Our article on whether common-law partners split property when they break up in Ontario covers that framework in full — read it if property is part of your situation, rather than assuming the support rules above extend to it.
Common Mistakes
Wrong, and potentially costly. Support rights and parenting rights for common-law partners and their children are real and substantial — don't walk away from a claim you may actually have.
Also wrong, in the other direction. Property division works very differently for common-law partners — see our dedicated property guide rather than assuming equalization applies to you.
An informal understanding about support, parenting, or property is difficult to enforce and easy to dispute later. A written separation agreement, ideally reviewed by independent lawyers, is the safer route.
If you left the workforce or scaled back for the relationship, delaying a support claim can weaken your position over time. Raise it with a lawyer promptly rather than assuming it will resolve itself.
When to Get Legal Advice
Because common-law separations raise genuinely different questions than married-couple divorces — a support threshold to confirm, a parenting framework that is reassuringly unaffected by marital status, and a property framework that is not — it is worth getting legal advice early rather than guessing at which rules apply to you. This is especially true if there are children involved, a significant income disparity between partners, or any property that one partner contributed to without being on title.
Separating from a common-law partner and not sure where you stand on support, parenting, or property? Call our Toronto separation lawyers at 416-274-2222 for a free consultation.
Frequently Asked Questions
No. Divorce is a legal process that ends a marriage, and there was no marriage to end. Separation for a common-law couple is simply a factual state — living separate and apart with no reasonable prospect of reconciliation. No court filing, application, or certificate is required to become separated.
For support purposes, the Family Law Act generally treats a couple as spouses once they have cohabited continuously for three years, or sooner if they have a child together and are in a relationship of some permanence. This threshold applies specifically to spousal support eligibility, not to property division rights.
Yes, once the "spouse" threshold is met. Support is assessed using the same general framework as married spouses — looking at compensatory, needs-based, or contractual entitlement — and the Spousal Support Advisory Guidelines can be used as an advisory tool. This is a meaningfully different, and generally more favourable, position than common-law partners have on property.
No. The SSAGs are an advisory tool that courts and lawyers commonly reference to gauge a reasonable range for amount and duration, but they are not a binding formula. The actual outcome depends on the specific facts of the relationship and is assessed case by case.
No. Decision-making responsibility and parenting time are governed by the Children's Law Reform Act using the same best-interests-of-the-child standard regardless of whether the parents were ever married. A child's parents have the same parenting rights and responsibilities either way.
No. Child support is calculated under the Federal and Provincial Child Support Guidelines based on income and parenting arrangement, and this applies identically whether the parents were married, common-law, or never lived together at all. Marital status is not a factor in the calculation.
Not necessarily. Many common-law couples resolve support, parenting, and property matters through a negotiated separation agreement without ever filing a court application. Court becomes necessary mainly when the parties cannot agree and one side needs an enforceable order.
No, and this is one of the most common and costly misunderstandings in this area. The Family Law Act's equalization of net family property applies only to married spouses. Common-law partners pursue property claims through different equitable doctrines, which is a separate topic from support — see our dedicated article on common-law property for how that works.
It can. Economic disadvantage arising from the relationship, including time out of the workforce, is one of the recognized bases for compensatory spousal support, assessed under the same general framework used for married spouses once you meet the "spouse" definition for support purposes.
Relying on a verbal understanding instead of a written separation agreement leaves both partners exposed — support, parenting, and property terms that were only discussed informally are difficult to enforce and easy to dispute later. Formalizing even a basic written agreement, ideally with independent legal advice, substantially reduces that risk.
There are time limitations that can apply to support claims, and they depend on the specific circumstances, so this is not something to assume about on your own. Waiting too long, especially after a significant period out of the workforce, can weaken your position — raising the issue promptly with a lawyer is generally the safer course.