- Minutes of settlement, a settlement letter, or a signed settlement agreement all create binding contractual obligations, even though they arose out of a legal dispute rather than a…
- Path 1 — A Motion Within the Existing Case If a lawsuit was already underway when the parties settled, and the court file is still technically open, or was only recently closed, it's…
Reaching a settlement is supposed to end a dispute — but what happens when the other side simply doesn't follow through? A breach of a settlement agreement in Ontario doesn't leave you starting from zero, but it does put you at a decision point: how do you actually make the other side comply, and does it matter whether the original lawsuit is still technically open?
This guide walks through what a settlement agreement legally is, the two main paths available when one is breached, and the practical factors that point toward one path over the other.
A Settlement Agreement Is Still a Contract
Minutes of settlement, a settlement letter, or a signed settlement agreement all create binding contractual obligations, even though they arose out of a legal dispute rather than a commercial deal. When one side doesn't pay, doesn't deliver what they promised, or otherwise doesn't follow through, that's a breach of contract — the settlement itself becomes the thing that was broken, layered on top of whatever the original dispute was about.
Two Main Paths When a Settlement Is Breached
Path 1 — A Motion Within the Existing Case
If a lawsuit was already underway when the parties settled, and the court file is still technically open, or was only recently closed, it's often possible to ask the same court to enforce the settlement by motion, rather than starting an entirely new lawsuit. This route can be faster because it avoids re-filing a claim, serving a new defendant, and starting the litigation process over.
Path 2 — A Fresh Lawsuit for Breach of the Settlement
Alternatively, the non-breaching party can start a new claim treating the settlement agreement itself as the contract that was breached. This is often the necessary route where the original court file is fully closed, where enforcement by motion isn't practically available, or where the remedy sought goes beyond what a motion in the original file can achieve.
Comparing the Two Paths
| Motion to Enforce in the Existing File | Fresh Lawsuit on the Settlement | |
|---|---|---|
| Starting point | Only available if the original proceeding is still open, or was recently closed | Available regardless of the status of the original file |
| Speed | Often faster — no new claim to file and serve | Follows the normal claim process, including service and response deadlines |
| What's at issue | Whether the settlement's terms were met | Whether the settlement contract was validly formed and breached, and what remedy follows |
| Court and filing choice | Same court as the original action | Determined by the amount and complexity of the new claim — Small Claims Court, Simplified Procedure, or ordinary Superior Court process |
What You Can Generally Seek
- Payment of the amount actually owed under the settlement, if the breach was a failure to pay
- An order compelling performance of a specific promise in the settlement, such as delivering a document or transferring property, depending on the remedy available
- Damages flowing from the breach of the settlement contract itself
- Costs, since Ontario's general "loser pays" costs principle applies to a motion or lawsuit to enforce a settlement much as it does to any other civil proceeding
Practical Factors That Affect Which Path Fits
- [ ] Is the original lawsuit's court file still open, or was it formally closed or dismissed?
- [ ] Is the breach a straightforward failure to pay, or something more complex requiring fuller evidence?
- [ ] Does the settlement agreement itself specify how disputes about its performance are to be resolved?
- [ ] Has enough time passed that a fresh claim could raise a limitation period concern?
- [ ] Would starting over with a new claim actually be simpler than trying to revive the old file?
Don't Forget: The Limitation Clock Still Runs
A settlement agreement doesn't pause Ontario's general limitation period for a claim based on its breach — the clock generally starts running again once the settlement itself is broken. Ontario's basic limitation period is two years from discovery, as of mid-2026 — verify this still applies, since some claim types carry shorter special periods. Waiting too long to act on a breached settlement carries the same risk as delaying any other civil claim.
Frequently asked questions
Do I need a new lawsuit if the other side just pays late?
Not necessarily. If payment eventually arrives, even late, there may be nothing left to enforce, though you could still consider whether the delay caused you a separate, recoverable loss depending on the settlement's terms.
What if the settlement was never actually signed, just agreed to verbally or by email?
A settlement can potentially be binding even without a single formal signed document, if the essential terms were clearly agreed to, but proving the existence and terms of an informal settlement is harder than pointing to a signed agreement — get advice on your specific situation.
Can I go back to court on the original dispute instead of enforcing the settlement?
Generally no. A valid settlement and release typically bar reviving the original claim; your remedy is usually to enforce the settlement itself, not to relitigate what it resolved.
Is a motion to enforce cheaper than a new lawsuit?
It's often faster and can involve fewer procedural steps, but "cheaper" depends on the specific facts and how contested the enforcement motion becomes — it isn't automatically the low-cost option in every case.
This is a litigation question
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