Is a non-compete clause enforceable in the UK?

Your employer cannot stop you taking another job just because a clause is in your contract. The restriction must protect a legitimate business interest and go no further than reasonably necessary. Before your next shift or start date, save the signed agreement and write down the deadline in any threat or court paper. If an injunction is threatened, act today.

Is a non-compete clause enforceable in the UK?

A restrictive covenant limits what you can do after leaving. A restraint of trade is unenforceable unless reasonable between the parties and in the public interest. The employer bears the burden of justifying it.

The government’s November 2025 working paper cites an earlier estimate of around 5 million GB employees with non-competes, typically lasting six months. Earlier polling found 71% lasted over three months. These figures describe contracts, not enforceability.

What the employer must prove

The employer needs both a legitimate interest and a restriction proportionate to protecting it.

A legitimate business interest

The usual interests are trade secrets, genuinely confidential information and customer connections developed through your work. The employer must identify what needs protecting and why your role puts it at risk.

Preventing competition or suppressing your general skills is not a legitimate aim. Herbert Morris v Saxelby [1916] and Faccenda Chicken v Fowler [1986] underpin that distinction. An engineer can use their expertise elsewhere, but not their former employer’s secret designs.

No wider than reasonably necessary

Courts examine duration, geographical reach and activities, including whether a narrower promise would protect the employer adequately.

Duration. How long will secrets stay sensitive or a successor need to rebuild client relationships? Six months is common, not a legal ceiling. Even short clauses can fail. The government says periods over 12 months are likely to be reasonable only exceptionally.

Geography. The area must fit the interest. A UK-wide ban for someone handling only local accounts needs justification. A global business may justify wider reach. Some clauses define their limits through clients or activities instead.

Activities. A restriction covering unrelated work for a competitor may go too far. In Tillman v Egon Zehnder [2019], the words “or interested” caught even a minority shareholding. The Supreme Court found that wording too wide, but removed it and allowed the remainder of the non-compete to stand.

Non-compete is not the only restraint

Read each promise separately. An invalid non-compete does not necessarily invalidate a properly drafted restriction on taking clients.

A former client calling you first does not bypass a non-dealing clause. Check both promises before accepting work. Separately, the Trade Secrets Regulations 2018 allow injunctions and damages for misuse without a valid non-compete.

Will yours hold? Five checks

1. Find the agreement date. Reasonableness is assessed when agreed. An unreasonable junior-level clause is not cured by promotion alone, as PatSystems v Neilly [2012] shows. Check later agreements too.
2. Check the dismissal. An employer’s repudiatory breach, such as wrongful dismissal without required notice or valid pay in lieu, can release the restraints. General Billposting v Atkinson [1909] is the leading authority.
3. Identify the interest. The employer must establish one, even if the clause does not name it.
4. Test the limits. Compare duration, area and activities with your duties and access when agreed. Your final job title does not settle the issue.
5. Check severance. Under Tillman, offending words may be deleted without adding or changing words, provided there is no major change to the overall effect of all post-employment restraints. Courts cannot rewrite “nine months” as “six months”.

Breach, costs and getting out

Enforcement belongs in civil courts, not employment tribunals. England and Wales use the county court or High Court; Scotland uses the sheriff court or Court of Session, with interdict rather than injunction. Northern Ireland also uses its civil courts.

An interim injunction, sometimes sought within days, can stop restricted work before the final trial. Employers may claim damages and sue a new employer that knowingly induces breach. A valid clause does not guarantee every remedy. If an injunction is threatened, treat the deadline on the papers as urgent; do not wait for negotiations to finish.

A “springboard” injunction can remove a head start gained through misuse of confidential information even without a valid non-compete, as QBE v Dymoke [2012] illustrates. A badly drafted covenant does not make copied client records safe to use.

The loser generally pays the winner’s legal costs. We cannot give you a reliable flat litigation price. Ask about your own costs, adverse costs and legal-expenses cover.

1. Take advice before starting. Supply the clauses, agreement dates, termination letter and proposed duties. Act immediately on an injunction application; obey court orders.
2. Check employer breach. See notice periods and wrongful dismissal. Being sacked does not itself release you.
3. Negotiate in writing. Seek a shorter period, excluded clients or consent to unrestricted duties. Record the release precisely.
4. Consider a declaration. Ask the court to declare the covenant unenforceable, or resist enforcement. An over-wide clause alone creates no general damages entitlement. Full costs recovery is not guaranteed.

Ask your union for legal help: Unite for hospitality or logistics, UNISON for care or NHS work, and USDAW for retail. Citizens Advice and law centres can help you find advice too. Acas early conciliation is for a separate employment tribunal claim, not a decision on whether a covenant is enforceable. If you may have another claim, contact Acas promptly; do not assume covenant negotiations stop its time limit.

Garden leave, notice and the executive exit

Garden leave and the restriction period

Garden leave keeps you employed and paid during notice. A post-employment non-compete usually starts at termination. Courts can consider the combined restriction, but garden leave is not automatically deducted.

If the contract expressly credits three months’ garden leave against a six-month non-compete, three months remain after termination. Without that wording, get advice. See garden leave.

Notice and pay in lieu

In Great Britain, section 86 of the Employment Rights Act 1996 requires employers to give at least one week after a month’s service and before two years. From two years, it is one week per complete year, capped at 12 weeks. You owe at least one week after a month. Contracts can require longer.

A valid payment-in-lieu-of-notice clause, or PILON, can allow immediate termination with payment instead. The employer must follow it. Gross misconduct can justify dismissal without notice.

The tax treatment of the exit payment

Since 6 April 2018, notice pay attracts income tax and Class 1 National Insurance regardless of a contractual PILON right. Calling it “ex gratia” does not change that. See HMRC’s PILON guidance.

The £30,000 income-tax threshold covers qualifying termination awards, not salary, holiday pay or notice pay. Aggregate relevant awards and benefits before applying it. The excess attracts income tax and employer Class 1A National Insurance.

An eligible former employee’s £20,000 notice-pay claim may go to the employment tribunal under its £25,000 GB contract award cap. Covenant enforcement cannot. The tribunal time-limit extension is below. Check your claim’s transitional rules and early conciliation requirements; tribunal deadlines do not govern a civil covenant dispute.

Secrets, NDAs and what already voids clauses

Under Faccenda Chicken, trade-secret duties can survive without an express covenant. Other post-employment confidentiality generally needs an express clause. Neither protects the employer from your general experience.

Terms blocking protected whistleblowing disclosures are void. Not every public allegation qualifies.

In England and Wales, since 1 October 2025, section 17 of the Victims and Prisoners Act 2024 protects specified disclosures by victims or people reasonably believing they are victims, including to police, lawyers and support services. Disclosures primarily intended to put information into the public domain are excluded.

The Employment Rights Act 2025 workplace NDA measures are separate. Regulation-making provisions have commenced, but substantive harassment and discrimination NDA measures are scheduled for 2027, not yet in force.

Settlements, shareholders and agency work

A settlement can release, repeat or introduce covenants. Statutory waiver of employment claims requires independent advice and other legal conditions; advice does not make every restraint enforceable.

Business-sale covenants may receive more latitude because buyers pay for goodwill. Shareholder, partnership and LLP restraints need their own assessment. Holding shares does not automatically make an employee a business seller. Agency-worker restraints also face scrutiny; transfer-fee arrangements are a separate issue.

Who the rules catch, and where

A “consultant” label does not establish equal bargaining power or justify a wider restraint. See employee, worker or self-employed.

Scotland applies the same broad principles with different civil procedure. Northern Ireland’s employment law is devolved, so the GB reform timetable does not automatically apply. Ordinary unfair dismissal there generally requires one year’s service, subject to exceptions. See Northern Ireland differences.

Property covenants are different. In England and Wales, some land-use restrictions can be discharged or modified by the Upper Tribunal’s Lands Chamber under section 84 of the Law of Property Act 1925.

Probation is contractual, not a test of covenant validity. The abandoned day-one unfair dismissal plan created no statutory probation period.

What is in force and what is proposed

The government’s timetable separates implemented measures from future dates, which remain subject to parliamentary processes.

1. 26 November 2025Non-compete options published

   Proposals include a length limit, outright ban, salary-threshold ban and combinations. Responses closed 18 February 2026. The three-month cap announced in May 2023 was not legislated.

2. 18 December 2025Employment Rights Act received Royal Assent

   Surrounding rights change in phases. No non-compete cap was introduced.

3. 1 October 2026Tribunal time-limit extension in force

   The timetable records three months increasing to six. Scotland’s employment-contract claims follow on 9 November 2026. Covenant enforcement remains outside tribunals.

4. 1 January 2027Unfair dismissal changes scheduled

   The GB qualifying period is scheduled to fall from two years to six months for dismissals from this date, with the compensatory cap removed.

5. 2027, date unconfirmedWorkplace NDA measures scheduled

   Harassment and discrimination NDA regulations are scheduled, not in force. See our Employment Rights Act guide.

Questions people ask

Is a non-compete clause enforceable in the UK?

Yes, but only if justified. A signature or contractual declaration of reasonableness is not enough. See GOV.UK and Acas.

How long can a non-compete last?

There is no statutory maximum as at 1 October 2026. Six months is common, not a ceiling. Every period needs justification.

What if a former client contacts me first?

A non-dealing clause may still prevent accepting the business. Check the wording, even if you did not approach them.

How do I get out of a non-compete?

Test its reasonableness and termination circumstances, negotiate a written release, or seek a court declaration. Get costs advice first.

Does it apply if I am sacked or made redundant?

Lawful dismissal and redundancy do not release you automatically. The employer’s repudiatory breach can. Lawful summary dismissal for gross misconduct is different.

Does garden leave shorten the ban?

A contractual deduction can do so automatically. Otherwise, courts assess the combined restriction; do not assume month-for-month credit.

Sources

1. Working paper on options for reform of non-compete clauses, Department for Business and Trade, published 26 November 2025, updated 19 February 2026
2. Plan to Make Work Pay and Employment Rights Act: timeline update, GOV.UK, updated 25 September 2026
3. Employment Rights Act 2025, legislation.gov.uk
4. Tillman v Egon Zehnder [2019] UKSC 32, Supreme Court judgment, The National Archives, especially paragraphs 85 to 88
5. Competition and market power in UK labour markets, Competition and Markets Authority, 25 January 2024
6. How work visa design is driving exploitation of migrant care workers, Citizens Advice, 11 March 2024
7. Employment Rights Act 1996, section 86, minimum notice, legislation.gov.uk
8. Employment Tribunals Extension of Jurisdiction Order 1994, England and Wales, legislation.gov.uk
9. Employment Tribunals Extension of Jurisdiction Order 1994, Scotland, legislation.gov.uk
10. Trade Secrets Regulations 2018, legislation.gov.uk
11. Employment Rights Act 1996, section 43J, protected disclosures, legislation.gov.uk
12. Victims and Prisoners Act 2024, section 17, permitted disclosures, legislation.gov.uk
13. EIM13500: termination payments and the £30,000 threshold, HMRC
14. NIM02520: payments in lieu of notice and National Insurance, HMRC
15. Handing in your notice: restrictive covenants, GOV.UK
16. Terms restricting a worker’s actions, Acas