Separation Agreements
A separation agreement that lets everyone move forward
A good separation agreement gives you certainty without a courtroom. We help you reach terms that are fair, clearly written and built to hold up if they’re ever questioned.

No notary needed – in writing, signed and witnessed is the rule
Each person should get their own independent legal advice
Full financial disclosure protects the agreement later
What a separation agreement is
When a relationship ends, there are suddenly a lot of decisions to make – about the children, the home, money and debts. A separation agreement is a written contract where you and your former partner record the decisions you’ve made together, so you don’t need a judge to make them for you.
It can cover parenting arrangements, including decision-making responsibility and parenting time (what used to be called custody and access), as well as child support, spousal support and how property and debts will be divided. Married and common-law couples can both use one.
You don’t need to be divorced, or even living in separate homes, to sign one. Many couples are separated under the same roof for a while. A separation agreement doesn’t end a marriage on its own – only a court can grant a divorce – but it often makes the divorce itself simple.
Most separating families in Ontario never need a trial, and a well-made agreement is usually how they get there. It’s often faster, less expensive and far less stressful than asking a court to decide.
How we can help
Whether you’ve already worked out most of the details or don’t know where to begin, we meet you where you are. Our job is to make sure the agreement is fair, complete and something you can live with for years to come.
Explaining your rights first. Before you agree to anything, we walk you through what Ontario law says about support, property and parenting in your situation.
Gathering financial disclosure. We help you collect and organize the documents both of you need, so decisions are based on real numbers rather than guesses.
Negotiating calmly. We work with your former partner or their lawyer to reach terms – by letter, in meetings, through mediation or through collaborative family law.
Drafting clear terms. We write the agreement in plain, precise language that leaves little room for arguments later.
Reviewing an agreement you’ve been handed. If your former partner’s lawyer has prepared a draft, we review it with you and give you independent legal advice before you sign.
Planning for change. We build in ways to review support or adjust parenting schedules as children grow and circumstances shift.
How the process works
Every family is different, so timelines vary. A straightforward agreement can come together in a few weeks; one involving a business, pensions or a disagreement over parenting can take several months.
Free consultation. We listen, answer your first questions and explain your options. There’s no obligation to go further.
Financial disclosure. You both exchange financial information – usually tax returns, notices of assessment, pay stubs, bank and pension statements, and a sworn financial statement. This step often takes the longest, depending on how quickly documents arrive.
Negotiation. We help you work through each issue. Some couples settle everything in one or two meetings; others use mediation or collaborative law to get through the harder topics.
Drafting and review. We prepare the agreement, or review the other side’s draft, and go through it with you line by line. A few rounds of revisions are normal.
Signing. Each of you signs in front of a witness, ideally after getting independent legal advice from your own lawyer. We’ll explain your signing options and make sure the formalities are met.
After signing. If the agreement includes support, it can be filed with the court so the Family Responsibility Office can enforce it if payments stop.
Common mistakes to avoid
Signing without your own lawyer. Using the same lawyer as your former partner, or no lawyer at all, makes the agreement easier to challenge and leaves you unsure of what you gave up.
Skipping full financial disclosure. If someone leaves out a significant asset or debt, a court can later set the agreement aside.
Relying on a handshake or text messages. In Ontario, a separation agreement generally has to be in writing, signed and witnessed to be enforceable.
Agreeing to child support below the Guidelines. Child support is the child’s right. A court can disregard child support terms that are unreasonable under the Federal Child Support Guidelines.
Waiting too long on property claims. Time limits apply. For married spouses, an equalization claim generally has to be started within two years of a divorce or six years after separation, whichever comes first. Common-law partners face different limits, so get advice early.
Leaving out the details. Vague terms like “reasonable parenting time” or “shared expenses” can turn into future disagreements. Clear wording now saves conflict later.
What makes an agreement hold up
Ontario’s Family Law Act sets out what a separation agreement needs to be enforceable, and courts look closely at how an agreement was made. A few things make the biggest difference.
It’s in writing, signed and witnessed. Section 55 of the Family Law Act says a domestic contract is unenforceable unless it’s made in writing, signed by the parties and witnessed. A notary isn’t required.
Both people had independent legal advice. The law doesn’t strictly require it, but separate lawyers for each person is the best evidence that you both understood the terms and signed freely.
There was full financial disclosure. A court can set an agreement aside if one person failed to disclose significant assets, debts or other liabilities that existed when it was signed.
Nobody was pressured. Signing under pressure, or without understanding what the agreement means, can also be grounds to set it aside.
The terms put the children first. A court can disregard parenting or child support terms that aren’t in a child’s best interests or that fall short of the Guidelines.
None of this means an agreement is fragile. When it’s done properly, a separation agreement is a strong, lasting document – and that’s exactly what we aim for.
What to do next
If you’re thinking about a separation agreement – or you’ve been given one to sign – you don’t have to sort it out alone. A short conversation can help you understand where you stand and what a fair agreement might look like.
Book your free 30-minute confidential consultation, in person in Newmarket, by phone or by video. We’ll listen first, then help you plan your next step.
Your lawyer for this

Marcus Ashby
Partner & Family Mediator
Marcus helps families separate with less conflict through collaborative family law and mediation, keeping children’s needs at the centre of every agreement.
Talk it through with us
Your first 30-minute consultation is free and completely confidential.
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Common questions
Straight answers, in plain language
These are the questions we hear most often about this. Every situation is different, so treat these as a starting point, not legal advice.
Do separation agreements need to be notarized in Ontario?
Do we both need our own lawyers for a separation agreement?
Can a separation agreement be changed or set aside in Ontario?
Is a separation agreement the same as a divorce?
Can we live in the same house and still be separated in Ontario?
How much does a separation agreement cost in Ontario?
How much does a family lawyer cost in Ontario?
Do you offer flat fees?
What is a retainer?
Can I get legal aid for a family matter?
Can my ex be ordered to pay my legal fees?
How can I keep my legal costs down?
Related help
Often part of the same conversation

Child & Spousal Support
Clear, fair support arrangements based on Ontario’s guidelines, so children and spouses can plan with confidence.
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Property Division
Understand your rights, from the family home to pensions, and divide property fairly with less stress.
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Mediation
Work out parenting, support and property with a neutral mediator – often calmer, quicker and less costly than court.
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