Non-Solicitation Clauses in Ontario: How to Protect Your Customer List When a Salesperson Leaves
The call almost always comes on a Friday. A founder has just watched a top salesperson resign, and the first question is never about the pipeline or the handover. It is this: "He is going to take the client list with him. Can I stop him?"
I understand the reflex. When you have spent years and real money building a book of business, the idea that one departing rep can walk it across the street feels like theft. So the instinct is to reach for the contract, find the non-solicitation clause, and treat it as the answer. It works, at least on paper. It is cheaper than a lawsuit. And now that Ontario has banned most non-competes, it is often the only restrictive covenant you have left.
I have leaned on that clause as the answer too. What I have learned, from both the HR side and the search side, is that a non-solicitation clause in Ontario does far less than most owners think, that a surprising number of the clauses sitting in your contracts right now would not survive a judge, and that even a perfectly drafted one will not stop a customer who has decided to follow a person they trust. The real protection is built long before the resignation letter lands, and it is not a paragraph.
Are non-solicitation clauses enforceable in Ontario?
Yes, a non-solicitation clause is enforceable in Ontario, but only when it is drafted narrowly and protects a genuine business interest. That last part is where most clauses come apart.
Start with the ground that shifted underneath everyone. Since October 25, 2021, the Working for Workers Act amendments to the Employment Standards Act, 2000 have prohibited most employee non-compete agreements in Ontario. A non-compete that catches an ordinary sales rep, a sales manager, or a VP of sales is void, with narrow exceptions for a genuine C-suite executive and for the sale of a business. Crucially, the ESA did not touch non-solicitation clauses. So the non-solicit is now carrying the entire weight of protecting your customers, and it is being asked to do a job it was never built to do alone.
Courts start from a position of suspicion. A restrictive covenant is treated as a restraint of trade and is presumptively unenforceable unless the employer can show it is reasonable. The framework comes from the Supreme Court of Canada in Elsley v. J.G. Collins Insurance Agencies Ltd., and it asks three things: does the covenant protect a legitimate proprietary interest, is it reasonable in scope between the parties (in the customers it covers, the time it runs, and the activity it bans), and is it reasonable in the public interest. Elsley also set a hierarchy that owners tend to miss: the courts prefer the least restrictive tool that still protects the interest, which is why a non-solicitation clause is favoured and a non-compete is reserved for exceptional cases. The clause has to be the smallest thing that does the job.
Why do so many non-solicitation clauses fail in court?
Because they are drafted to feel strong rather than to hold. Four failure patterns show up again and again in Ontario decisions.
The first is the "accept" trap. In Donaldson Travel Inc. v. Murphy, the clause said the employee would "not solicit or accept business" from the employer's accounts. That one extra word was fatal. The Court of Appeal held that a clause barring an employee from accepting business, not just from chasing it, is not a non-solicit at all. It functions as a non-compete, because it stops the former employee from serving a customer even when the customer came to them freely. Courts look at what a covenant does, not what it is labelled. Add "accept" and you have quietly written a non-compete, which for a sales rep is now void.
The second is overbreadth. In H.L. Staebler Company Limited v. Allan, the Court of Appeal struck down a covenant that swept too widely, with no meaningful limit on the clients or territory it covered. A clause that reaches every customer the company has ever had, forever, protects nothing the law recognizes and gets nullified in full.
The third is ambiguity. In Shafron v. KRG Insurance Brokers (Western) Inc., the Supreme Court refused to enforce a covenant whose geographic term was unclear, and it declined to rewrite the clause to make it work. This is the point owners find hardest to accept: a judge will not fix your bad drafting. There is no reading down a vague clause into a reasonable one. If it is ambiguous or too broad, it is gone, and you are left with nothing.
The fourth is the missing interest. In MEDIchair LP v. DME Medequip Inc., the Court of Appeal refused to enforce a covenant because the party trying to rely on it no longer had a genuine interest to protect in that market. The lesson is blunt: use it or lose it. A covenant exists to protect real goodwill and real customer relationships, not to punish a former employee or to fence off ordinary competition.
Put those four together and the pattern is clear. The clauses that fail are the aggressive ones. The clauses that hold are narrow: a defined list of customers the rep actually dealt with, a defined and recent look-back period, solicitation only (never "accept"), and a sensible time limit, most often six to eighteen months.
What a non-solicitation clause can and cannot do
Here is the harder truth, and it is behavioural, not legal. Even the perfect clause does not stop the thing you are actually afraid of.
Peer-reviewed research on business-to-business selling has a name for your real exposure: salesperson-owned loyalty. In a study of 362 buyer-seller relationships, Palmatier, Scheer and Steenkamp found that customers often feel more loyalty to their salesperson than to the firm behind them, and that this personal loyalty is the loyalty that most directly drives sales and revenue. It is also the loyalty that walks out the door with the rep. When the person leaves, the customer's instinct is to follow the relationship, not the logo.
A non-solicitation clause can stop your former rep from calling that customer. It cannot stop the customer from calling the rep. And if the customer reaches out first, of their own accord, most well-drafted clauses do not even apply, because the rep has not solicited anyone.
There is a second trap, and it is one I have fallen into. We reach for the covenant reflexively, as if signing it solves the problem. The research on how these agreements are actually used should give every owner pause. Starr, Prescott and Bishara, in the Journal of Law and Economics, found that restrictive covenants are widespread even in places where they are legally unenforceable, that only about one in ten employees ever negotiates one, and that roughly a third are handed the agreement after they have already accepted the job. In other words, these clauses are often signed without thought on either side, which is exactly why so many of them are unreasonable, and why leaning on one gives you a false sense of security while the real relationship risk goes unmanaged.
How to actually protect your customer list when a salesperson leaves
Protection is a system, not a sentence. Here is the order I work through it, and none of it depends on a lawsuit.
Draft the clause to hold, not to intimidate. Limit it to customers the employee actually dealt with in a defined recent window, say the last twelve months. Restrict solicitation only, and delete any language about "accepting" or "servicing" business, which converts it into a void non-compete under Donaldson. Set a defined term, commonly six to eighteen months. Narrow beats broad every time, because an overbroad clause is struck in full, not read down.
Pair it with confidentiality and your own property. Your customer list, pricing, and pipeline data are protectable as confidential information and trade secrets in their own right, separate from the non-solicit. A tight confidentiality clause, plus clear ownership of CRM records and contacts, often does more real work than the non-solicit, because it protects the information rather than trying to control the person.
Institutionalize the relationship before you need to. This is the one that actually moves the needle on salesperson-owned loyalty. Make sure no single rep is the only human your customer knows. Bring a manager, a technical contact, or a second rep into key accounts. Keep contact history, notes, and commitments in a shared system the company owns, not in one person's inbox and head. A customer who trusts your company, not just your rep, is far less likely to follow anyone out the door.
Manage the exit deliberately. When a rep resigns, move quickly and professionally on the handover: introduce the successor, communicate with key accounts on your terms, and document the transition. A warm, well-run handoff protects far more revenue than a cold threat ever will.
Confirm the drafting with employment counsel. Restrictive covenants are one of the areas where small wording choices decide whether you have protection or nothing, and where a clause valid in one role is void in another. This is general HR information, not legal advice, so have your covenants reviewed by Ontario employment counsel before you rely on them.
When I run a retained search for a sales leader, protecting the existing book is half the brief. Selection is the other half: hiring the kind of leader who builds loyalty to your company, not just to themselves, is a better long-term defence than any covenant. That is the work I do as a Fractional VP of Sales and HR and as a retained search partner, and it is why the customer-book conversation and the hiring conversation are really the same conversation.
The clause matters. Get it drafted narrowly and it will do its job. But if the only thing standing between you and losing your customers is one paragraph in a contract nobody read, the clause was never the protection. The relationship was.
Work with Ashley
Ashley Wesley (MA, CHRL, CIM) is a Fractional VP of Sales and HR and a retained and executive search partner based in Guelph, Ontario, Canada. He helps owners and leaders at Ontario small and mid-sized businesses (roughly 20 to 500 employees) protect their teams and their customer relationships, design sales compensation and restrictive covenants that actually hold, and run a rigorous selection process so they hire the right sales leader the first time. Learn more or start a conversation at ashleywesley.com.
In short
A non-solicitation clause is enforceable in Ontario only when it is narrow: limited to customers the employee actually served, restricted to soliciting (never "accepting") business, and capped at a reasonable term. Since Ontario banned most non-competes in 2021, the non-solicit carries the full load, but it still cannot stop a customer who chooses to follow a departed rep. The durable protection is a system: a tight clause, strong confidentiality and CRM ownership, and multi-threaded relationships so customers are loyal to your company, not just one person.
Key takeaways
Non-solicitation clauses are enforceable in Ontario when they protect a legitimate business interest and are reasonable in scope, customers, activity, and time (usually six to eighteen months).
Since October 25, 2021, most employee non-competes are void under Ontario's Employment Standards Act; non-solicitation and confidentiality clauses are not restricted.
The word "accept" turns a non-solicit into a void non-compete (Donaldson Travel v. Murphy); overbroad clauses are struck in full (Staebler); courts will not rewrite ambiguous ones (Shafron); and you need a real interest to protect (MEDIchair).
Peer-reviewed research shows customers are often loyal to the salesperson, not the firm, so a clause cannot stop a customer who follows the rep voluntarily.
The strongest protection is built before anyone resigns: institutionalize relationships, own your data, and hire leaders who build company loyalty.
Frequently asked questions
Are non-solicitation clauses legal in Ontario?
Yes. Ontario's 2021 ban on non-compete agreements did not restrict non-solicitation clauses. A non-solicit remains legal and enforceable if it protects a legitimate business interest and is reasonable in scope and duration.
What makes a non-solicitation clause unenforceable in Ontario?
Common defects include barring the employee from "accepting" as well as soliciting business (which makes it a void non-compete), covering too many customers or too long a period, using vague or ambiguous language, having no time limit, or trying to protect an interest the employer no longer has. Courts strike defective clauses in full rather than rewriting them.
Can I stop a former salesperson from taking my clients?
You can stop them from actively soliciting the customers they dealt with, if your clause is drafted properly. You generally cannot stop a customer who chooses to follow the salesperson on their own initiative, because that is not solicitation. This is why owning the relationship and the data matters more than the clause.
How long can a non-solicitation clause last in Ontario?
There is no fixed statutory limit, but Ontario courts assess reasonableness case by case. Terms of roughly six to eighteen months are common for sales roles; longer periods need specific justification tied to the role and the sales cycle.
Is a non-solicitation clause the same as a non-compete?
No. A non-solicit stops a former employee from soliciting your customers or staff. A non-compete stops them from working in a competing business at all. Most employee non-competes are now void in Ontario, so drafting a non-solicit that accidentally behaves like a non-compete will make it unenforceable.
References
Elsley v. J.G. Collins Insurance Agencies Ltd., [1978] 2 S.C.R. 916. https://scc-csc.lexum.com/scc-csc/scc-csc/en/item/2687/index.do
H.L. Staebler Company Limited v. Allan, 2008 ONCA 576. https://www.canlii.org/en/on/onca/doc/2008/2008onca576/2008onca576.html
Shafron v. KRG Insurance Brokers (Western) Inc., 2009 SCC 6. https://scc-csc.lexum.com/scc-csc/scc-csc/en/item/2586/index.do
Donaldson Travel Inc. v. Murphy, 2016 ONCA 649. https://www.canlii.org/en/on/onca/doc/2016/2016onca649/2016onca649.html
MEDIchair LP v. DME Medequip Inc., 2016 ONCA 168. https://www.canlii.org/en/on/onca/doc/2016/2016onca168/2016onca168.html
Ontario Ministry of Labour. Your guide to the Employment Standards Act: Non-compete agreements. Government of Ontario. https://www.ontario.ca/document/your-guide-employment-standards-act-0/non-compete-agreements
Palmatier, R. W., Scheer, L. K., & Steenkamp, J. E. M. (2007). Customer loyalty to whom? Managing the benefits and risks of salesperson-owned loyalty. Journal of Marketing Research, 44(2), 185-199. https://journals.sagepub.com/doi/10.1509/jmkr.44.2.185
Starr, E. P., Prescott, J. J., & Bishara, N. D. (2021). Noncompete agreements in the US labor force. The Journal of Law and Economics, 64(1), 53-84. https://www.journals.uchicago.edu/doi/10.1086/712206
