An initial period for assessing a new employee's suitability for a role.
A probation period is an opening phase of employment, created by the employment contract, during which an employer assesses a new hire's suitability and either side can usually end the contract on shorter notice than normal. It is a contractual arrangement rather than a legal status: employees do not lose their statutory rights during it.
Nothing in employment law creates a probation period. It exists because the contract says it does: the contract fixes its length, what happens when it ends, and whether it can be extended at all. That last point catches employers out. Where the written terms say nothing about extension, there is no right to extend, and telling a new starter their probation is being carried on for a few more months is a variation of contract rather than an administrative decision.
Failing probation is likewise not a legal category. What actually happens is a dismissal, and it is judged by the same rules as any other dismissal. The probation label governs the internal process and the notice the contract specifies; it does not change what the event is.
The most common drafting error is a probation clause setting notice below the statutory floor, or removing notice altogether for the opening months. Statutory minimum notice from an employer starts once an employee has one month of service: at least one week's notice for an employee employed between one month and two years, one week's notice for each year between two and twelve years, and twelve weeks' notice at twelve years or more. GOV.UK is explicit that an employer may give more than the statutory minimum but cannot give less.
A probation notice clause is therefore only doing real work where the standard contractual notice runs to months and the clause pulls it back towards the statutory minimum. Pulling it below that minimum for someone past their first month is unenforceable, and the statutory entitlement applies instead of the clause.
| Length of continuous service | Employer's statutory minimum notice |
|---|---|
| 1 month to 2 years | At least one week |
| 2 to 12 years | One week for each year |
| 12 years or more | 12 weeks |
Probationers are employees. Pay must meet the national minimum wage, statutory holiday accrues from the first day worked, health and safety duties apply in full, and protection from discrimination and from dismissal for a protected reason such as whistleblowing or asserting a statutory right requires no qualifying service at all. A dismissal presented as not passing probation is no defence where the real reason was one of those.
Pension auto-enrolment is a recurring confusion. The duty is triggered by a worker's age and earnings, not by their probation status, and the statutory postponement mechanism is a separate device with its own notice requirements. Not eligible until probation ends is not one of the available options.
The reason probation feels legally decisive is the qualifying period of continuous service attached to an ordinary unfair dismissal claim. But that is a rule about length of service, not about probation. It runs on the calendar whether or not the contract calls the opening months a probation, and extending probation does not extend it. The qualifying period is also subject to legislative change, so confirm the current position against official guidance rather than a figure someone remembers.
Most probation periods end in silence. The review date passes, nobody books the meeting, and the employee is confirmed in post by default. That is the legally correct outcome, because the contractual probation term has simply expired, but it is a poor one where concerns were live and unresolved. Any decision to extend or to dismiss has to be made and communicated before the end date, which means the reminder needs to sit weeks earlier rather than on the day itself.
The other half is evidence. Where probation does end in dismissal, the useful record is not the final meeting but the trail leading to it: objectives set at the start, concerns raised in writing as they arose, the support or training offered, and what changed afterwards. That record is what separates a genuine judgement about capability from one a departing employee can characterise as something else.
Not once the employee has a month's service. From one month of service an employer must give at least one week's notice, and GOV.UK states an employer may give more than the statutory minimum but cannot give less — so a probation clause promising less than that is unenforceable and the statutory entitlement applies instead. Longer contractual notice, if the contract gives it during probation, is what governs.
Only if the contract reserves the right to extend it. Probation is a contract term, so extending it without that right is a variation of contract that needs the employee's agreement. Any extension must also be decided and communicated before the original end date, otherwise the probation term has expired and the employee is confirmed in post. An extension changes nothing statutory: continuous service keeps running throughout.
Statutory holiday accrues from the first day of employment regardless of probation, and a policy can restrict when leave is taken but not whether it builds up. Purely contractual extras — enhanced sick pay, private medical cover, some allowances — can be made conditional on passing probation, but only where the contract or policy says so clearly. Anything statutory, including auto-enrolment duties driven by age and earnings, applies on its own terms.
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