What Is a Non-Compete Clause?
A non-compete clause (also called a restraint of trade clause) restricts what you can do after leaving a job or ending a commercial relationship. Typically, it prevents you from working for a competitor, setting up a rival business, or approaching certain clients for a defined period after your contract ends.
In employment contracts, non-competes are the most contested type of restrictive covenant in UK law. They are enforceable — but only if they go no further than is reasonably necessary to protect a legitimate business interest.
Are Non-Compete Clauses Enforceable in the UK?
UK courts treat non-compete clauses with significant scepticism. The starting position is that any restraint of trade is void — the burden falls on the employer to justify why the restriction is reasonable. Courts will look at three things:
- Legitimate business interest: The employer must be protecting something real — typically trade connections, confidential information, or a stable workforce. A general desire to limit competition is not enough.
- Reasonable scope: The restriction must not be wider than necessary. A clause banning you from working in an entire industry globally is almost certainly unenforceable.
- Reasonable duration: Most enforceable non-competes run for 3 to 12 months. Anything beyond 12 months faces serious scrutiny, particularly for non-senior roles.
What Duration Is Considered Reasonable?
There is no fixed rule, but the following are generally accepted benchmarks for employment non-competes in the UK:
- Junior to mid-level roles: 3 to 6 months is typically the upper limit
- Senior or specialist roles: 6 to 12 months may be justified where genuine confidential information or customer relationships are involved
- Director or C-suite level: Up to 12 months, sometimes longer in specific industries such as financial services
Duration alone does not determine enforceability — a 6-month clause covering the entire UK market may be less enforceable than a 12-month clause limited to a specific region or client list.
Red Flags to Look For
- No geographic limitation — a nationwide or worldwide restriction for a locally-focused role
- No definition of "competition" — leaving scope dangerously open to interpretation
- Duration exceeding 12 months without clear justification
- No carve-out for businesses you had no contact with during employment
- No compensation offered in exchange for the restriction
- Clause applies even if you are made redundant or the employer terminates without cause
How to Negotiate a Non-Compete
Non-compete clauses are negotiable before you sign — courts look more favourably on restrictions that were genuinely agreed rather than imposed. Consider asking for a narrower geographic scope, a shorter duration, a defined list of named competitors rather than a broad category, and explicit carve-outs for clients you bring to the role.
If you have already signed and are considering breaching a non-compete, seek legal advice before acting. Injunctions are the typical remedy and can be obtained quickly.