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Offers to Settle in Ontario Family Court: Rule 18 Guide

Learn how a formal offer to settle works in Ontario family court, how to accept or withdraw it, and how it can affect who pays costs.

Family Law5 min readTSLBy the Treadstone Law Team · OntarioUpdated November 1, 2026
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Key takeaways
  • A formal offer must be signed personally by the party making it and by their licensed representative.
  • An offer can be withdrawn by serving a notice at any time before it is accepted, and the only valid way to accept it is to serve an acceptance.
  • If the timing and result conditions in rule 24(12) are met, the person who made the offer can recover full costs from the date it was served.

Most family cases end in an agreement, not a judgment. A formal offer to settle is one of the main tools for getting there, because it puts a clear proposal on the table in writing and gives the other side a reason to take it seriously.

This article explains how an offer under Rule 18 of the Ontario Family Law Rules works, how it is accepted or withdrawn, and how it connects to the rules about costs. It is general information, not advice on your own case.

What a formal offer to settle is

An offer to settle is a written proposal to resolve some or all of the issues in your case on stated terms. Casual messages and phone calls may help negotiations, but a formal offer follows the Family Law Rules so that it can carry costs consequences later.

Under Family Law Rules r. 18(4), an offer must be signed personally by the party making it and by their licensed representative. The making, withdrawal, acceptance and rejection of offers carry the costs consequences set out in r. 24.

Older guides may place the costs consequences of offers in a different part of the rules. The current provisions on this point are in r. 24(12) and (13).

Accepting, withdrawing and running out of time

The rules are specific about how an offer ends. The person who made it may withdraw it by serving a notice of withdrawal at any time before it is accepted. The only valid way to accept an offer is to serve an acceptance on the party who made it. A friendly reply or a verbal "we agree" is not the safe way to do it.

There is also a cut-off. An offer may not be accepted after the court begins to give a decision.

How an offer can affect costs

Costs are the money one side may be ordered to pay toward the other side's expenses of the case. There is a presumption that a successful party is entitled to the costs of a step in a case, and the court decides costs promptly after each step or reserves them for later.

An offer can strengthen a costs claim. Under r. 24(12), a party who made an offer is entitled to costs up to the date the offer was served, and full recovery of costs from that date, if all of the following apply:

ConditionWhat it means
Timing for a motionThe offer was made at least 1 day before the motion date
Timing for a trial or other hearingThe offer was made at least 7 days before the hearing date
Still openThe offer did not expire and was not withdrawn before the hearing started
Not acceptedThe other party did not accept it
ResultThe party obtained an order as good as or better than the offer

The party claiming this benefit has the burden of proving that the order is as good as or better than the offer. Even an offer that does not meet every requirement of r. 24(12) can still be considered by the court when it sets the amount of costs.

Except at a binding judicial dispute resolution (JDR) hearing, the judge sees the parties' offers only after deciding the issues. This means you can make a realistic offer without worrying that it will colour the decision on the merits.

Other rules that shape costs

An offer is only one part of the costs picture. The rules also include several situations that change the usual result:

When the court sets an amount, it may look at the reasonableness and proportionality of each party's behaviour, the time spent, written offers, legal fees and rates, and other properly paid expenses, all relative to the importance and complexity of the issues. Claims for fees and expenses must be backed by satisfactory documentation.

Before each step, the parties must confer about costs, or make real efforts to do so. This does not apply where a court order prohibits it or there is a risk of domestic violence.

What to do next

Offers are easy to get wrong, because small details such as signatures, dates and service decide whether they count. Getting advice before you sign or serve one is usually worthwhile. Judges and court staff cannot give legal advice. Legal Aid Ontario duty counsel and advice counsel at family courthouses may give 20 minutes of advice, whether or not you are eligible for legal aid, though availability varies by courthouse.

Frequently asked questions

Can I take back an offer after I serve it?

Yes, you can withdraw it by serving a notice of withdrawal at any time before it is accepted. After it is accepted, it is too late. Also, an offer that was withdrawn before the hearing started cannot support the full recovery rule in r. 24(12).

Will the judge see my offer during the trial?

Generally not. Except at a binding JDR hearing, the judge sees the parties' offers only after deciding the issues.

How do I accept an offer made to me?

The only valid way is to serve an acceptance on the party who made the offer. You cannot accept it once the court has begun to give a decision.

What if the final order is worse for me than my offer?

The full recovery benefit applies only if you obtained an order as good as or better than your offer, and you carry the burden of proving that. Your offer can still be one of the things the court considers when it sets costs.

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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