Non-Compete Clauses in UK Employment Contracts: Are They Enforceable?

A non-compete clause is a type of post-termination restrictive covenant. It is a term in an employment contract that limits what someone can do once their job ends — usually by preventing them from working for a competitor or running a competing business in a defined area for a set period.

Non-competes are the strongest restrictive covenant available, so employers often combine them with narrower covenants. The table below compares the main types.

Because non-solicitation and non-dealing covenants restrict less, courts find them easier to justify. An employer relying only on a broad non-compete may be left with no protection if that clause fails.

These clauses are not limited to senior roles in finance or technology. The government's working paper reports them in over 20% of accommodation and food services jobs and over 10% of teaching and retail roles.

A non-compete clause is enforceable if the employer can prove two things: that it protects a legitimate business interest, and that it is no wider than reasonably necessary to protect it. If either part fails, the whole clause falls away — and the legal burden of proving both sits with the employer.

Reasonableness is judged at the date the agreement was made, not the date the person leaves. A clause that was excessive when a junior employee joined does not become valid because they were later promoted. That is why businesses should refresh restrictive covenants when someone moves into a more senior role.

The law recognises a limited set of interests that justify a restriction:

• Confidential information. Trade secrets, pricing, strategy and other sensitive know-how that could help a competitor.
• Client connections. Relationships with clients and suppliers built up at the firm's expense.
• Workforce stability. Protection against a departing manager taking key colleagues with them.

Simply wanting to avoid competition is not enough. Employees are entitled to use their general skills and experience wherever they work next.

Once an interest is established, the court looks at the detail. The key factors are:

• Duration. The government's working paper puts the typical length at six months, while YouGov polling found 71% of non-competes run longer than three months. Some have lasted up to 24 months, but anything beyond 12 months is hard to justify for most employees.
• Geographic scope. A radius around an office can be reasonable for a local business, but for companies that trade online or nationally it often means little.
• Activities. The restriction should cover the specific work the person did, not the whole sector.
• Seniority. A sales director with the full client list justifies more than a junior administrator.

The leading modern case is the Supreme Court's decision in [Tillman v Egon Zehnder Ltd [2019] UKSC 32](https://supremecourt.uk/cases/uksc-2017-0182). Ms Tillman had been a senior executive in the firm's financial services recruitment practice. Her clause stopped her being "interested" in a competing business, which on its face would have banned even a small shareholding. The Supreme Court removed the words "interested in" and enforced the rest.

This process, known as severance, only works if the offending words can be deleted without adding or rewriting anything, and the remaining clause still makes sense. Courts will not redraft an unfair covenant to save it.

Non-compete clauses given by the seller of a company are treated differently. When a buyer pays for goodwill, both sides usually have more equal bargaining power and have taken legal advice, so longer restrictions are more likely to be upheld than in employment agreements. The restriction must still relate to the business that was sold.

Commercial agreements between businesses — such as supplier or joint venture agreements — can also contain non-competes, which are assessed under both contract and competition law.

The same logic often applies between co-founders and shareholders, who should also take advice from solicitors.

Reform has been the subject of more than one consultation. In 2023, the previous government said it would limit non-compete clauses to three months, but no legislation followed. On 26 November 2025, the Department for Business and Trade published a working paper setting out four options:

• A statutory limit. Capping non-competes, with three months as the main proposal.
• A full ban. Removing non-compete clauses from employment altogether.
• A salary threshold. A ban for workers earning below a set threshold.
• A combined approach. A ban below the threshold and a time limit for higher earners.

The consultation on these options closed on 18 February 2026. Until any reform becomes law, the common law test above continues to apply. The paper cites Competition and Markets Authority research showing non-competes appear in 20% to 30% of agreements for workers earning under £99,000. The CMA's Competing for Talent guidance, published in September 2025, also warns that no-poach deals between rival businesses can break competition law.

In practice, a statutory limit would still allow short non-competes, while a full ban would push businesses towards garden leave and longer notice periods. A salary threshold would help protect lower-paid workers, but no threshold figure has been confirmed.

The debate in Britain sits within a broader global shift against broad non-compete agreements:

• California (USA). Non-compete clauses are almost entirely unenforceable under Business and Professions Code §16600, with very narrow exceptions relating to the sale of a business. California's approach is frequently cited as a model by reform advocates worldwide.
• United States (FTC). The Federal Trade Commission attempted a nationwide ban on non-competes in 2024, but a federal district court in Texas struck it down before it was due to take effect on 4 September 2024. The debate continues at state level.
• Australia. After a Treasury consultation in 2023 on restricting post-employment restrictions, the Australian government announced in its March 2025 Budget its intention to ban non-compete clauses for workers earning below the high-income threshold (approximately AUD 175,000). Draft legislation was introduced in September 2026, with the ban expected to take effect from 2027.
• Austria and other EU member states. Several European countries already require employers to pay compensation during the restricted period — at least 30% of the employee's last salary in Austria — an approach the UK government explicitly ruled out in its working paper.

Employers reviewing their templates should assume that any UK statutory cap is likely to be short, and rely more on garden leave, confidentiality terms, and non-solicitation clauses in the meantime.

If you are asked to sign a non-compete, or your employer tries to enforce one, you have more options than many people realise.

• Negotiate before signing. Ask for a shorter period, a narrower scope, or a list of named competitors instead of a blanket ban.
• Ask for it to be removed. When changing jobs or being promoted, it is reasonable to request that an old restriction is deleted or released in writing.
• Check enforceability. Compare the clause with your actual role, access to confidential information, and client contact.
• Get legal advice early. Employment solicitors regulated by the Solicitors Regulation Authority (SRA) can review the clause and help you respond before you accept a new job.
• Be transparent. Tell a prospective employer about any restrictions — a new company that knowingly hires someone in breach can be drawn into a dispute.

If a letter arrives threatening legal action, do not ignore it. Many disputes settle through undertakings — such as agreeing not to contact certain clients for a limited time — often with help from solicitors on both sides.

A well-drafted restriction is narrow, specific, and tailored to the individual role.

An employer cannot simply insert a non-compete into an existing agreement. The employee has to agree, and the change should be supported by something of value — such as a pay rise, a bonus, or a promotion. Without that, the restriction may fail for lack of consideration, so record it in a written variation signed by both parties.

Garden leave deserves particular attention. It keeps someone on full pay during their notice while stopping them from working, which keeps them out of the market without relying on a post-termination restriction.

Our guide to the permanent employment contract in the UK covers the other terms to include, and our article on signing employment contracts electronically shows how to get them signed quickly.

An employer that believes a former employee is breaching a non-compete usually starts with a letter setting out their obligations. If that fails, it can apply for an injunction to stop the competing activity — often on an urgent basis — and claim damages for any losses.

To succeed, the employer must also be able to prove that the employee signed and understood the restriction. Using an electronic signature platform such as Youtrust means every signed document carries a timestamped audit trail: the employer can show exactly who signed, on which device, and when — making enforcement proceedings significantly cleaner.

Employees facing a claim should speak to solicitors straight away, because injunction proceedings move quickly.

Non-compete clauses can protect a business, but only when they are carefully drafted. Identify a real interest, keep the restriction short and narrow, back it up with non-solicitation and confidentiality terms, and refresh them when roles change. With reform still under discussion, employers who rely on proportionate restrictions will be best placed whatever the government decides.

Every covenant also needs clear evidence that the employee agreed to it. Youtrust records who signed each document and when — giving your employment terms the legally valid, tamper-proof audit trail they need if you ever have to enforce them.