Probationary Periods: Do You Need a Formal Process?

Probation period UK: a plain-English guide for small employers

Picture this. The hire looked perfect on paper. Three weeks in, you are not so sure. This is exactly why the probation period UK employers rely on exists. You put time and hope into recruitment. Now there is a nagging question. Settle in slowly, or not the right fit at all? A simple, written probation process turns that feeling into a fair decision.

A probationary period is not red tape. Done well, it is your lightest, clearest tool to make a call based on evidence. Yes, you do need a process. No, it does not need to be heavy.

Quick Answer Box

• Do this: set a clear probation length in the contract, give objectives and honest reviews, and write down what you decide.
• Avoid this: treating probation as a free pass to dismiss anyone, or doing nothing then panicking at the end.
• Write down: the probation length, the objectives, each review, and the final decision with the reasons behind it.

Probation period UK: what the law actually says

Here is the bit most people get wrong. Probation is not a legal concept. There is no statutory probation period in UK employment law. It is contractual, a clause that creates a defined window to assess a new hire.

That has two big consequences:

• You decide the rules. Length, any right to extend, and what notice applies. Put it in the contract.
• Statutory rights do not switch off during probation. This is the part many employers misunderstand.

So probation gives you a structured internal process. It does not create a rights-free zone.

> "During a probation period, employees should get training, support and feedback to help them do their job well." - ACAS guidance

Source: ACAS, Probation periods

How long should a probation period be?

There is no legal minimum or maximum. In practice, most employers use three to six months.

• Three months suits roles where you can judge core tasks quickly.
• Six months suits senior or complex roles where impact takes longer.

Pick a period you can defend. Write it into the contract. Then back it up with clear expectations and real reviews. A date with no objectives is useless.

Tip from the HR Queen Bee: book review dates on day one. Calendar invites beat good intentions every time.

Which rights still apply during probation?

Read this twice. During probation, employees and workers can still be entitled to:

• Protection from discrimination, which applies from day one under the Equality Act 2010 guidance
• Statutory Sick Pay, if they meet the qualifying conditions
• Statutory minimum notice, once service triggers it
• Pension auto-enrolment, subject to eligibility rules

Probation tweaks your internal review process and sometimes the contractual notice. It does not remove core legal protections. Treating probation as "anything goes" is how small businesses stumble into a discrimination claim.

What about notice during probation?

Shorter notice in probation can be sensible if it is not working for either side. Two rules:

• The contract must say so. If it does not, normal contractual notice applies.
• It cannot go below the statutory minimum once that minimum applies.

Check your contract wording before you rely on shorter notice, and confirm any notice in writing. For the statutory minimums that sit under all of this, see our guide to UK rates and thresholds: UK statutory pay rates for 2026 to 2027 and GOV.UK notice periods.

An important change on the horizon

For years, the rough rule was ordinary unfair dismissal protection kicked in after around two years' service. That is expected to change.

The Government has trailed plans to make unfair dismissal protection a day-one right, paired with a statutory approach to probation handling. The detail is still being finalised and is not yet law. Treat this as forthcoming, and check current status before you act.

Suggested source to monitor: GOV.UK King's Speech background briefing notes

Practical point: the old "we can let them go easily in the first two years" mindset is fading. A fair, documented probation process protects you, now and later.

How to run a probation process that actually works

You do not need a thick policy. You need a few steps, done well.

Step 1: Set clear expectations up front

Before they start, agree what good looks like. Use the job description. The new starter should know the key tasks, the standards, and how you will assess them. No surprises.

Step 2: Build an induction plan

List what they need to learn and by when. Use a simple sign-off sheet for training with dates. That turns "they should be getting it by now" into visible progress.

> "Clear objectives and regular reviews improve new starter performance and retention." - CIPD Onboarding factsheet

Source: CIPD, Onboarding and induction factsheet

Step 3: Hold regular reviews

Schedule short check-ins. Week one, month one, and the midpoint works well. Give honest feedback, listen to theirs, and note agreed actions. Most issues are fixable if raised early. Most disasters come from silence.

Step 4: Offer support

If someone is struggling, ask what would help. Training, clear priorities, buddying, or a bit more time. Show you tried to help. That is part of a fair process and part of a good culture.

Step 5: Make a clear decision

At the end, look at the evidence and decide: confirm, extend, or end. Whatever you choose, write it down with reasons. Confirm it in writing.

Extending or failing probation

• Extending: only if the contract allows it. If someone is close, an extension can be fair. Explain what must improve and set a firm date. Give a meaningful period, not a token week. If the contract is silent on extensions, you may not be able to extend, so fix the clause now, not at the deadline.
• Failing: base the decision on evidence, not gut feel. Discrimination protection still applies, and day-one unfair dismissal is expected to arrive. If a tough chat could escalate, refresh your rights to companions at meetings: who can accompany an employee at a meeting.

Mini-drama from the hive: a café manager forgot to include an extension clause. They tried to extend a failing probation by email anyway. The employee refused, then later claimed the review was unfair. A one-line clause in the contract would have saved weeks of stress. Kettle on, clause added.

A short script for a probation review

To open an honest mid-probation check-in:

"I wanted us to take stock of how the first few weeks have gone. There is a lot you have picked up well, and I want to flag a couple of areas to focus on, so you have a clear run at the rest of your probation. Let us talk through what would help, and I will put a short note in writing so we are both clear."

Honest, supportive, and on the record. That is the goal.

What to write down

Keep a simple paper trail:

• The probation length and any right to extend, stated in the contract
• The objectives and standards shared at the start
• Notes from each review, including feedback and concerns
• Any support or training offered
• The final decision, the reasons, and the written confirmation sent to the employee

If you ever need to justify ending employment, this file is the difference between a clear decision and an argument you cannot win.

Mythbuster parade

• "Probation lets me dismiss with no process." No. Be fair, document reviews, and follow your contract.
• "Under two years is low risk." That thinking is expected to change. Build your process now.
• "I can extend any probation." Only if your contract says you can.
• "Rights pause during probation." They do not. Day-one discrimination protection applies.

FAQs

• What is a fair length for a probation period in the UK?

Three to six months is common. Pick a length you can justify for the role and put it in the contract.

• Can I end employment during probation without a reason?

You still need a fair, non-discriminatory reason and a basic process. Keep notes of objectives, reviews, support, and your decision.

• Can I extend probation if the contract does not mention it?

Usually no. Add an extension clause now for future hires. For the current case, take advice.

• What notice applies during probation?

Whatever the contract says, subject to the statutory minimum once it applies. Check: GOV.UK notice periods

• Do employees get sick pay and holiday during probation?

Yes. Statutory rights apply if they meet the conditions. Contractual extras depend on your policy.

• Should reviews be monthly or more often?

Early and often. Week one, month one, midpoint, and end. Add extras if support is needed.

Helpful links and resources

• ACAS guidance on probation periods
• Equality Act 2010 guidance
• GOV.UK notice periods
• CIPD Onboarding factsheet

Need a hand tightening your process?

• Get a free sense check: our HR Health Check spots missing clauses and messy reviews.
• Want ongoing support while you grow? Our HR Protect plan covers contracts, handbooks, and advice.
• Scaling fast or need hands-on help with reviews and onboarding? Meet our HR Business Partner service and our Breathe HR setup to keep everything tracked.
• Prefer to talk it through? Book a quick discovery call. We will help you build a probation process that is fair to your people and safe for your business.

As we wrap up, keep it human, keep it fair. Kettle On, Standards Up. Until next time, keep buzzing and take care of your people!