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Find a Lawyer » Canada Legal Guides » Ontario Legal Guides » Family Law & Divorce Ontario » Divorce & Separation Guides Ontario » What Are Cost Consequences for Rejecting a Reasonable Settlement Offer in Ontario?

What Are Cost Consequences for Rejecting a Reasonable Settlement Offer in Ontario?

9 Jun 2026 5 min read No comments Divorce & Separation Guides Ontario
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Under Rule 18(14) of the Ontario Family Law Rules, rejecting a reasonable formal settlement offer can be financially devastating. If you reject an offer and receive a worse outcome at a trial, the Superior Court of Justice may order you to pay “substantial indemnity costs,” covering up to 90% of your ex-partner’s legal fees.

Going to trial in a family law dispute is incredibly expensive and drains judicial resources. 💰 To encourage couples to resolve their issues privately, the Ontario family justice system heavily incentivizes settlement. One of the most powerful tools a law firm can use is a formal “Offer to Settle.” If an offer is fair, rejecting it purely out of spite or stubbornness carries massive financial risks known as “cost consequences.”

Whether your case is being heard in Brampton, Hamilton, or London, judges in the Superior Court of Justice have broad discretion to penalize unreasonable behaviour. If you force your ex-partner to spend tens of thousands of dollars on a trial, only for the judge to award you less than what was originally offered to you in writing months ago, the court will likely make you foot the bill for their lawyer. This system is designed to punish those who use litigation as a weapon.

Step-by-Step Process for Settlement Offers and Costs in Ontario

Understanding how offers and costs work is crucial for assessing risk in your divorce. 📈 You should never proceed to trial without doing a deep cost-benefit analysis with your legal counsel. Here is how the process unfolds under the Family Law Rules.

Step 1: Drafting and Serving the Offer

A legally binding offer must meet specific criteria under Rule 18. It must be in writing, signed by the party or their lawyer, and clearly state the terms being proposed (e.g., specific amounts for spousal support or the division of the matrimonial home). To trigger the most severe cost consequences, the offer must be served on the opposing party at least seven days before the trial begins and must remain open until the trial starts.

Step 2: Evaluating the Risk of Rejection

When you receive an offer, you and your lawyer must carefully weigh the proposed terms against your absolute best-case scenario at trial. 🤔 You must factor in the unpredictable nature of judges and the guaranteed hourly fees of your own lawyer. If the offer is “close enough” to what you want, rejecting it is a massive gamble. If you reject it, the offer is confidentially set aside, and the judge will not see it during the actual trial.

Step 3: The Trial Decision

The trial proceeds normally, and the judge eventually releases their final decision (Endorsement or Judgment). Up to this point, the judge is completely unaware that a settlement offer even existed. This “blindness” ensures the judge decides the case purely on the legal facts regarding parenting time, support, and property division, rather than who offered what.

Step 4: The Costs Submission and Argument

Once the final decision is released, the “winning” party’s lawyer will immediately show the judge the previously hidden Offer to Settle. 📄 If the judge sees that the trial outcome is as good as or better than the offer that was rejected, Rule 18(14) is triggered. The lawyer will submit a Bill of Costs detailing all their hourly fees, and argue that the losing party should pay “partial indemnity” or “substantial indemnity” costs for wasting everyone’s time.

How Much Does it Cost in Ontario?

The cost consequences in Ontario family court are not mere slaps on the wrist; they are designed to sting. Depending on the judge’s ruling, you could be on the hook for tens of thousands of dollars. Here is how the courts typically categorize and award legal costs in CAD.

  • Partial Indemnity Costs: This is the standard award for a “successful” party. It usually covers about 40% to 60% of their actual legal fees. For a typical trial, this might equal $15,000 to $30,000.
  • Substantial Indemnity Costs: Triggered by Rule 18(14) when a good offer is rejected. This covers roughly 80% to 90% of the winning party’s legal fees. This can easily result in a devastating $40,000 to $80,000+ cost award against you.
  • Full Indemnity Costs: Extremely rare. Covers 100% of legal fees, usually only awarded when a party acts maliciously, fraudulently, or in complete bad faith during the litigation.
Type of Cost AwardPercentage of Fees CoveredEstimated Financial Risk (CAD)
No Costs Ordered0%$0
Partial Indemnity40% – 60%$15,000 – $30,000
Substantial Indemnity80% – 90%$40,000 – $80,000+

How Long Does the Process Take?

An Offer to Settle can be made at any point during your separation, even before formal court documents are filed. ⏱️ However, for strict Rule 18 cost consequences to apply at trial, the offer must be served no later than 7 days before the trial commences. The offer will typically state an expiration date, often exactly one minute before the trial begins.

The argument over costs happens after the trial is over. Once the judge releases their final decision, the parties are usually given 14 to 30 days to submit their written arguments regarding costs. The judge will then take a few more weeks to issue a final “Costs Endorsement,” officially ordering the losing party to pay.

Frequently Asked Questions (FAQ)

Can an Offer to Settle be withdrawn?

Yes. Unless the offer explicitly states that it is irrevocable until a certain date, a party can withdraw their offer in writing at any time before it is accepted by the other side. Once withdrawn, it cannot trigger Rule 18(14) cost consequences.

Does this rule apply to child support cases?

Yes, but with a major caveat. The court’s primary concern is the best interests of the child. If an offer proposed paying less child support than the mandatory Canadian guidelines require, a judge will generally not penalize you for rejecting an illegal or unfairly low support offer.

What if both sides were being unreasonable?

In cases involving “divided success”-where you win on some issues like property division, but lose on other issues like parenting time-the judge may decide that each party should simply pay their own lawyer, resulting in a “no costs” order.

How do I actually pay the cost award?

If a judge orders you to pay $30,000 in costs, it becomes a legally enforceable court debt. It can be deducted from your share of the matrimonial home sale, or the winning party can enforce it through wage garnishment or placing a lien on your property.

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