Probation Period Guide
How long a UK probation period can run, what notice applies, which rights kick in from day one, and what changes for everyone on 1 January 2027.
How Probation Periods Work
A probation period is a trial window at the start of a job, set out in the employment contract, during which the employer assesses whether someone is right for the role. It has no special status in UK law — there’s no statute that creates or governs it — so almost everything about it, including whether one exists at all, depends on what the contract says.
It’s a contractual tool, not a legal status
There is no UK legislation that defines a probation period, sets its length, or gives employers special dismissal powers during it. Everything comes from the contract: whether probation applies, how long it lasts, what notice applies, and whether it can be extended.
Length is whatever the contract says
Three and six months are the most common lengths in practice, but there’s no statutory minimum or maximum. An earlier government proposal for a formal nine-month statutory probation window was dropped from the final Employment Rights Act 2025, so the position remains entirely contractual.
Statutory rights still apply throughout
Probation doesn’t pause or reduce employment rights. National Minimum Wage, discrimination protection, working time rules and statutory holiday all apply from day one, whether or not someone is “on probation”. A probation clause can never lawfully remove these.
Dismissal still needs to be handled properly
Most probationary employees can’t currently bring an ordinary unfair dismissal claim, because that requires two years’ continuous service. But certain dismissals are automatically unfair regardless of length of service, and discrimination claims have no qualifying period at all — so a fair, documented process is still the safest approach.
Probation Quick Facts
The essentials, at a glance
Rights During Probation
Some rights apply the moment employment starts. Others build up with continuous service, and probation doesn’t change that timeline either way.
| Right | When it applies | Affected by probation? |
|---|---|---|
| Written statement of employment particulars | Day one | No |
| National Minimum / Living Wage | Day one | No |
| Protection from unlawful discrimination | Day one | No |
| Working time protections (rest breaks, max hours) | Day one | No |
| Statutory holiday entitlement (5.6 weeks pro rata) | Day one, accrues from start | No |
| Whistleblowing protection | Day one | No |
| Statutory minimum notice (1 week) | After 1 month of continuous service | No — starts at 1 month regardless of probation |
| Statutory Sick Pay | From day one, subject to eligibility rules | No |
| Ordinary unfair dismissal claim | Currently 2 years’ service; 6 months from 1 Jan 2027 | No — probation length doesn’t change the threshold |
| Written reasons for dismissal on request | Generally requires qualifying service (exceptions apply) | No |
| Automatically unfair dismissal grounds (e.g. pregnancy, whistleblowing) | Day one, no qualifying period | No |
“Affected by probation?” means whether being formally on probation changes when the right applies. In every case it doesn’t — these thresholds run from the start of continuous employment, not from the end of probation.
The Road to January 2027
The Employment Rights Act 2025 reshapes the unfair dismissal landscape without creating a statutory probation period. Here’s the sequence of events.
Probation FAQ
Answers to the questions people most often ask about how probation periods actually work in the UK.
There is no statutory maximum or minimum length for a probation period in the UK. It is set entirely by the employment contract. Three months and six months are the most common lengths, though some roles use shorter or longer periods, and contracts often allow an extension if more time is needed to assess performance.
The statutory minimum notice period is one week once an employee has been continuously employed for one month or more, and none at all before that. Many contracts set a shorter contractual notice period during probation, such as one week throughout, provided it never falls below the statutory minimum once that minimum applies.
Several rights apply immediately regardless of probation status: a written statement of employment particulars, protection from unlawful discrimination, the National Minimum Wage or National Living Wage, working time protections including rest breaks, statutory holiday entitlement, and protection for whistleblowing. Probation does not suspend or reduce any of these — a probation clause has no power to override them.
In most cases yes, in the sense that an ordinary unfair dismissal claim currently requires two years of continuous service, so most probationary employees cannot bring one on procedural grounds alone. However, certain dismissals are automatically unfair regardless of length of service — including those related to pregnancy, whistleblowing, trade union activity, or asserting a statutory right — and discrimination law also applies from day one with no qualifying period.
From 1 January 2027, the qualifying period for ordinary unfair dismissal reduces from two years of continuous service to six months, under the Employment Rights Act 2025. An earlier proposal for a formal nine-month statutory probation period was not included in the final Act. Probation itself remains a contractual arrangement with no set length, but the window in which an employer can dismiss without unfair dismissal risk becomes much shorter.
Only if the contract allows it. Most probation clauses include a right for the employer to extend the period, often by up to three months, typically where performance needs more time to assess properly or where absence has interrupted the review process. Without a contractual right to extend, an employer cannot simply prolong probation unilaterally, and doing so without agreement could itself be a breach of contract.
No. Statutory holiday entitlement of 5.6 weeks (pro rata for part-time staff) starts accruing from the first day of employment, whether or not someone is on probation. Some employers restrict when holiday can be taken during probation, or require manager approval, but they cannot reduce the entitlement itself below the statutory minimum.