A non-compete clause is a restriction that may stop a seller from competing with the business after completion. Buyers ask for it to protect goodwill. Sellers should make sure it is reasonable and properly advised.
Quick Answer: What is a non-compete in a business sale?
A non-compete clause in a business sale is a contractual restriction preventing the seller from starting, joining or supporting a competing business for a defined period of time, within a defined geographical area, and in relation to defined activities.
The core purpose is to protect the buyer's investment. When someone buys a business, a significant part of what they are paying for is often intangible — the reputation of the business, its established customer relationships, its trading name in a local area, and the goodwill it has built up over time. A seller who immediately starts a competing business can damage or destroy that value, leaving the buyer with less than they paid for.
For buyers, a non-compete clause is therefore a standard and sensible protection. For sellers, it is a restriction that can have a meaningful impact on their ability to work and earn after the sale is done. A non-compete should always be specific, reasonable and proportionate — and it should always be reviewed by a solicitor before the seller agrees to it.
Contents
Why buyers ask for non-compete clauses
When a buyer acquires a business, they are often paying — at least in part — for things they cannot physically pick up and examine. The value of a business frequently lies in its reputation, its customer loyalty, its relationships with suppliers, and the goodwill that has been built through years of trading. These are things that belong to the business at the moment of sale, but they are things that a seller carries around in their head and their contacts book.
A buyer may be paying in particular for:
The goodwill and reputation the business has built over time
Established customer relationships and repeat trade
A local trading name or brand associated with a specific area
The knowledge and relationships of the seller, which the buyer is in effect acquiring
Supplier relationships and preferential terms
Referral networks and word-of-mouth revenue streams
If the seller is free to open a competing business the day after completion, they can begin to recapture that value — drawing customers back to them, leveraging the same supplier relationships, trading on the same reputation and local knowledge, and potentially undoing the benefit of the sale for the buyer.
The concern is not hypothetical. Without protection, a café owner could open next door. A hairdresser could reopen around the corner and invite their loyal clients to follow. A tradesmen could call their former customers directly. An accountancy or legal practice seller could take their client files and relationships to a new firm. A digital agency owner could offer identical services to the retained client base under a new name.
A non-compete clause is the buyer's primary contractual tool for preventing this. It is a reasonable expectation in any deal where goodwill is a meaningful part of the value being purchased.
What a non-compete may restrict
The scope of a non-compete clause varies from deal to deal, but it typically restricts one or more of the following:
Starting a competing business— operating as a sole trader, through a company, or in partnership in competition with the purchased business
Working for a competitor— taking employment or a consulting role with a business that competes with the one sold
Investing in a competitor— holding a financial stake in a competing business (though truly passive investment below a certain threshold is often carved out)
Advising a competitor— providing guidance, strategic support or professional services to a competitor
Trading within a radius— carrying on a competing business within a specified geographical distance of the business's trading location
Trading for a period— restrictions that apply for a fixed number of years after completion
Targeting specific customers— approaching, soliciting or dealing with customers of the sold business
Using a similar trading name— operating under a name similar enough to create confusion with the business being sold
Employing former staff— recruiting employees away from the business to work for the seller
Interfering with suppliers— seeking to disrupt or take over the business's supplier relationships
Using confidential information— applying knowledge of the business's clients, pricing, processes or strategies in a competing context
A well-drafted non-compete clause will define precisely what is restricted in each of these dimensions. The activities that are prohibited should be described clearly. The territory should be defined — whether that is a mileage radius, a list of postcodes, a region, or a national restriction. The time period should be stated with a specific start and end date. And any permitted exceptions should be spelled out.
Vague restrictions cause disputes. A clause that says the seller agrees "not to compete" without defining what competition means, where it applies, or for how long is a potential source of expensive litigation.
Non-compete vs non-solicitation vs confidentiality
Non-compete is the most commonly known restriction, but buyers and sellers should understand that several related but distinct types of restriction often appear in business sale agreements. These are not interchangeable.
Non-compete
A non-compete clause prohibits the seller from operating or being involved in a business that competes with the one sold. It is the broadest type of restriction and can prevent the seller from working in a whole sector or type of activity, not just from approaching specific people.
Non-solicitation
A non-solicitation clause is more targeted. It prevents the seller from actively approaching or soliciting the business's customers, employees or suppliers — but it does not necessarily prevent the seller from working in the same industry. A customer who independently seeks out the seller may be permitted to deal with them, depending on the drafting.
Non-dealing
A non-dealing clause goes further than non-solicitation. It prevents the seller from doing business with certain customers even if those customers approach the seller first, without any active solicitation.
Confidentiality
A confidentiality restriction prevents the seller from using or disclosing confidential information about the business — client lists, pricing, processes, strategies, and so on. This is separate from competitive activity and typically runs for longer than the non-compete restriction.
Non-poaching
A non-poaching clause specifically prevents the seller from recruiting employees from the business they have sold, whether to join a new competing venture or another employer.
A buyer may ask for more than one of these. A seller should understand each restriction separately, because they have different scopes and consequences. Agreeing to a non-compete does not automatically mean you have agreed to a non-dealing clause, and vice versa. The documents need to be read carefully.
How non-competes protect goodwill
Goodwill is the value attached to a business's reputation, its customer relationships, its brand and its expected future earnings. In many business sales — particularly in service-based, local or client-facing businesses — goodwill makes up a large proportion of the purchase price.
A buyer's argument for a non-compete is straightforward: "I am paying for the customer base, the reputation and the relationships this business has built. I need protection to ensure the seller cannot immediately take that value back."
The seller's counter position is equally legitimate: "The restriction should protect the value the buyer has paid for, but it should not go so far that I cannot earn a living or work in any capacity in my industry."
The balance between these two positions is where negotiation happens. A clause that is necessary to protect the value being transferred to the buyer is legitimate. A clause that goes beyond that — preventing the seller from doing entirely unrelated work, or covering the whole country when the business is purely local — is likely to be disproportionate and may face challenge.
The connection between the restriction and the goodwill being purchased is not just a matter of fairness — it is also relevant to whether the clause would be enforced in court. Restrictions that go beyond what is necessary to protect a legitimate business interest are less likely to be upheld as enforceable.
What sellers should check
Before agreeing to any non-compete or related restriction, sellers should work through a number of specific questions. Ideally this should be done with a solicitor who can advise on whether the restriction is reasonable and what practical effect it will have.
The questions to consider include: How long does the restriction last, and does that feel proportionate given the nature of the business? Where does it apply geographically, and is that area genuinely connected to where the business trades? What activities are restricted, and are they described clearly enough to know what you can and cannot do? Are truly passive investments — for example, holding shares in a listed company — excluded? Does the restriction prevent employment in the same sector, and would that affect your livelihood? Does it cover consultancy work as well as direct business operation? Is there an explicit carve-out for unrelated work that happens to be in the same broad industry? Are existing side businesses or other trading interests carved out from the restriction? Does the restriction extend to connected companies, family members, or business partners? Is the definition of competing customers or activities clear enough to be workable? Does the restriction cover online trading specifically, and if so, how is that defined? What happens if the buyer fails to complete or breaches the agreement?
Each of these questions can have a material impact on what the seller is able to do after completion. Sellers who agree to restrictions without fully understanding the answers to these questions often find themselves in difficult positions later.
Common negotiation points
Non-compete clauses are regularly negotiated between solicitors in business sale transactions. The outcome depends on the nature of the business, the level of goodwill involved, the seller's plans for life after the sale, and the relative bargaining positions of the parties.
Common areas of negotiation include the length of the restriction, the geographical territory to which it applies, whether specific named customers or a more general category of customers are covered, how the competing activity or sector is defined, whether existing trading interests or professional activities are excluded, whether the seller can hold a passive minority shareholding in a competitor, whether the restriction covers employment as well as ownership or self-employment, the scope of any non-solicitation clause, whether staff restrictions apply and to which employees, whether supplier relationships are included, how online trading is handled where geography is less relevant, and what remedy the buyer has for breach.
For a local business — a pub, café, salon or retail shop — the restriction often focuses on a geographical radius and a specific activity, and typically lasts between one and three years. For a service business where customer relationships are the main asset — an accountancy practice, recruitment agency, or marketing consultancy — the restriction may focus more on defined client lists and sectors, with geography being secondary. For a technology or online business where geography is largely irrelevant, the negotiation often focuses on sector definition and specific customer categories.
Examples
Local business example
A seller of a café agrees not to open, operate or be involved in any café, coffee shop or food service business within five miles of the sold business for a period of two years following completion. Passive investment below five percent in a listed company is excluded.
Client-based professional services example
A seller of an accountancy practice agrees not to solicit or provide services to any client who was a client of the sold practice in the twelve months before completion, for a period of three years. They are free to work in the accountancy profession generally, including for new clients who were not connected to the sold business.
Agency example
A seller of a marketing agency agrees not to provide similar services to any of the ten named retained clients for a period of two years, but is free to continue working in digital marketing for other clients and businesses.
Overly broad example
A seller is restricted from working in any capacity in any business anywhere in the United Kingdom for five years. This kind of clause is likely to be disproportionate and potentially unenforceable — and no seller should agree to it without detailed legal advice on what it means and whether it would stand up.
Red flags
Sellers and buyers alike should pause and seek advice if any of the following situations arise in connection with a non-compete clause.
The restriction is stated in very broad or sweeping language without specific definitions. The geographical territory is either undefined or far larger than the business actually operates in. The duration feels excessive relative to the nature of the business and its customer relationships. The activities being restricted are defined so broadly as to cover things unrelated to the business being sold. The clause would prevent the seller from earning any income in their area of professional expertise. Existing business interests or side activities have not been discussed and are not carved out. Online trading is included but not adequately defined. Family members or connected companies are potentially captured by the restriction but this has not been discussed. The buyer is unwilling to consider any reasonable exceptions. The clause appears to have been copied from another transaction without being tailored. And finally — the seller is being asked to sign a clause they do not fully understand, without having taken independent legal advice.
Non-compete checklist
Buyer checklist
The goodwill risk has been identified and the restriction is proportionate to it.
The restriction is clearly linked to the business and customer base being purchased.
Customer, staff and supplier protections have been considered and addressed.
The time period is reasonable and legally defensible.
The geographic territory reflects where the business actually operates.
The restricted activities are clearly and specifically defined.
Confidentiality obligations are covered separately.
A solicitor has been instructed throughout.
Seller checklist
The full restriction has been read carefully and understood.
The time period and its practical impact on future work have been assessed.
The geographic scope has been checked against where the seller plans to work.
The restricted activities have been assessed against the seller's planned future activities.
Exceptions for existing businesses, passive investment and unrelated work have been negotiated.
Existing interests that need to be carved out have been disclosed and addressed.
The impact of the restriction on future earnings has been fully considered.
A solicitor has been instructed and legal advice taken before signing.
FAQs
Are non-compete clauses enforceable in UK business sales?
They can be, but enforceability depends on whether the restriction is reasonable in scope, territory and duration, and whether it goes no further than is necessary to protect the legitimate business interest the buyer has acquired. Courts will not automatically enforce an overly broad clause simply because it was agreed in a contract. Both the reasonableness of the restriction and the circumstances of the deal are relevant. This is why legal advice before signing is essential.
Do all business sales need a non-compete clause?
Not always. The need for a non-compete depends on how much of the business value is tied to goodwill, customer relationships and the seller's personal involvement. For a business where the seller has little ongoing relationship with customers — perhaps a property business or a very passive investment — the risk to the buyer may be low. For a business where the seller's relationships, reputation and expertise are central to the value, a non-compete is very likely to be appropriate.
Is a non-solicitation clause alone enough?
Sometimes. A non-solicitation clause prevents the seller from actively approaching the business's customers but does not prevent the seller from working in the same industry or even from accepting business from customers who approach them. In some deals, this level of protection is sufficient. In others, where the risk of customer migration is higher, a buyer may need both a non-solicitation and a non-dealing clause, and possibly a broader non-compete.
Can a seller continue to work in the same industry after selling?
It depends on the wording of the restriction. Some non-competes prevent only the seller from starting or running a competing business, while allowing them to take employment in the same sector. Others are broader. Sellers should ensure the clause reflects what was discussed and agreed, and should negotiate clear carve-outs for any planned future activity before signing.
Should buyers always insist on a non-compete?
Where goodwill and customer relationships are a meaningful part of what is being purchased, some form of protection is almost always sensible. The appropriate form and scope depend on the specific deal. A solicitor can advise on what is reasonable and proportionate in the circumstances.
Key takeaways
Non-compete clauses are a standard feature of business sales where goodwill matters — and in most owner-managed businesses, it does. Buyers are right to ask for them. Sellers are right to scrutinise them carefully.
A good non-compete clause protects the buyer's real investment without going further than is necessary. It is specific about what is restricted, where, and for how long. It carves out activities that have nothing to do with the value being transferred. And it leaves the seller able to earn a living, just not by directly undermining the value the buyer has just paid for.
For buyers: link the restriction to the actual risk. A clause that is reasonable and proportionate is more likely to be enforceable and more likely to be agreed without unnecessary dispute.
For sellers: understand every element of the restriction before you sign. Know what you can and cannot do, and for how long. Negotiate exceptions where they are genuinely needed. And take legal advice — a restriction you sign without understanding is one that may affect your livelihood for years.
Related resources
Important disclaimer
Buy a Business Ltd is a marketplace, not a broker, corporate finance adviser, M&A adviser, law firm, accountant, tax adviser, lender, valuation firm, escrow provider, insolvency practitioner or investment adviser. Information, guides, checklists and examples on this site are for general guidance only and do not constitute legal, tax, financial, investment, lending, valuation, property, employment, data protection, brokerage, corporate finance, M&A or regulated advice.
Business sale terms such as exclusivity, warranties, indemnities, non-compete clauses, retentions, escrow arrangements and break-fee provisions can have legal and financial consequences. You should seek independent professional advice before signing heads of terms, paying money, granting exclusivity, agreeing restrictions or completing a business purchase.
Sources and useful references
GOV.UK: Business transfers, takeovers and TUPE
Acas: What a TUPE transfer is
ICO: Due diligence when sharing data following mergers and acquisitions
Companies House/GOV.UK: Get information about a company
GOV.UK: Business Asset Disposal Relief