What Happens If a Seller Breaches a Non-Compete After an Ontario Business Sale?

You bought a business, in part, because the seller agreed to walk away from the market for a defined period. Then a customer mentions they saw the seller opening a similar shop two towns over — or worse, calling your own client list. A breach of non-compete after a business sale is one of the more stressful discoveries a new owner can make, because the whole point of paying for goodwill was that the person who built it wouldn't immediately compete for it.

The good news is that non-compete clauses signed as part of a genuine business sale are treated very differently, and far more favourably for the buyer, than ordinary employee non-competes. This article explains why that clause is likely enforceable, what remedies are actually available if it's breached, and how to reduce the risk before you sign.

Why the Seller's Non-Compete Is Different From an Employee's

Since October 25, 2021, Ontario's Employment Standards Act, 2000 has generally prohibited employers from entering non-compete agreements with employees. That ban has a narrow business-sale exception: where a seller becomes an employee of the purchaser as part of selling the business, a non-compete tied to that sale can still be used. There's a separate exception for defined executive roles.

This matters because it means the non-compete you negotiated with a departing owner isn't automatically void the way a rank-and-file employee non-compete would be. But the exception is specific — it generally requires the seller to actually become an employee of the buyer. A non-compete signed only by a departing minority shareholder who never becomes your employee sits in a greyer area and deserves its own legal review before you assume it's enforceable on the same footing.

A properly drafted seller non-compete is also assessed differently by a court than a workplace restrictive covenant, because it was bargained for as part of the price paid for the business — including its goodwill — rather than imposed on someone with less bargaining power.

What Counts as a Breach

A breach isn't limited to opening an identical business next door. Depending on how the clause is worded, a seller might breach it by:

• Starting or joining a competing business within the restricted geographic area and time period.
• Soliciting the buyer's customers, clients, or employees (sometimes covered by a separate non-solicitation clause rather than the non-compete itself).
• Using confidential information — pricing, supplier terms, customer data — to help a new venture, which may also breach a separate confidentiality obligation.
• Acting as a consultant, silent investor, or informal advisor to a competing business, if the clause is drafted broadly enough to catch indirect involvement.

The exact scope depends entirely on how the non-compete, non-solicitation, and confidentiality clauses were drafted in your purchase agreement. This is why precise drafting at the time of sale matters more than almost anything else in this area — a narrow or ambiguous clause gives a departing seller room to argue their new venture doesn't technically breach it.

Remedies Available to the Buyer

1. An injunction

Because damages from lost customers and eroded goodwill can be difficult to measure precisely, a buyer facing an active or imminent breach often seeks an injunction — a court order requiring the seller to stop the competing activity. Courts can grant interim relief quickly in urgent cases, though the buyer generally has to show the harm is serious, that damages alone wouldn't fairly compensate them, and that they moved promptly once they learned of the breach.

2. Damages

A buyer can also sue for damages — the financial loss caused by the breach, which might include lost profits, lost customers, or a decline in the business's value. Proving the amount can be genuinely difficult, since it requires showing what the business would have earned absent the breach. Some well-drafted agreements include a liquidated damages clause instead — a pre-agreed formula for breach — though whether such a clause is enforced as written, or struck down as an unenforceable penalty, depends on the drafting and is a question for your lawyer.

3. Indemnification and holdback claims

If your purchase agreement included a holdback or escrow — funds withheld at closing to secure post-closing claims — a non-compete breach may let you make a claim against those funds directly, which is often faster and less expensive than starting a lawsuit from scratch.

Practical Steps If You Suspect a Breach

• [ ] Document what you've observed — dates, locations, communications, customer reports — before confronting anyone.
• [ ] Pull your purchase agreement and review the exact wording of the non-compete, non-solicitation, and confidentiality clauses, including their geographic scope and duration.
• [ ] Check whether a holdback or escrow is still held and what the claim procedure requires.
• [ ] Get legal advice quickly if you're considering an injunction — delay can weaken your case for urgent relief.
• [ ] Avoid confronting the seller informally in a way that could tip them off before you're ready to act, if litigation looks likely.

Reducing the Risk Before You Sign

The strongest position is the one you build at drafting stage, not after a breach. That means:

1. Defining the restricted activity, geography, and time period as precisely as the deal supports — vague clauses are harder to enforce.
2. Separating non-compete, non-solicitation, and confidentiality obligations into distinct, clearly worded provisions rather than one blended clause.
3. Confirming the seller will genuinely become your employee (or fits the executive exception) so the ESA business-sale exception clearly applies.
4. Considering a holdback tied specifically to post-closing covenant compliance, not just general indemnity claims.

Frequently asked questions