Fair Dismissal: What Employers Need to Know in the UK

Dismissing an employee is one of the tougher parts of running a small business. Done well, it’s a necessary step to protect your team and your business. Done poorly, it can lead to costly claims, low morale and reputational damage.

So what is “fair dismissal” in the UK? In short, it’s about having a fair reason and following a fair process. In this guide, we’ll walk you through what that means in practice, when dismissal is likely to be fair, and how to avoid common pitfalls.

If you’re unsure how to proceed with a specific situation, don’t stress - with the right approach and documentation, you can make confident, compliant decisions.

What Does “Fair Dismissal” Mean Under UK Law?

Under the Employment Rights Act 1996, a dismissal will usually be considered fair if:

• You have a fair reason for dismissal; and
• You follow a fair procedure in reaching that decision.

There are five potentially fair reasons:

• Conduct (e.g. misconduct, repeated rule breaches)
• Capability or performance (e.g. not meeting role requirements, long-term ill health)
• Redundancy (role no longer needed)
• Statutory restriction (it would be illegal for the employee to continue in their role)
• Some other substantial reason (SOSR) (e.g. business reorganisation, breakdown in trust)

Having a fair reason isn’t enough by itself - you also need to act reasonably. That typically means investigating, holding a meeting, considering the employee’s response, and making a balanced decision. Following the ACAS Code of Practice on disciplinary and grievance procedures is a good benchmark for reasonableness.

Note: some reasons for dismissal are automatically unfair (for example, dismissing for whistleblowing, pregnancy/maternity, trade union membership or for asserting a statutory right). Discrimination is also unlawful at any stage of employment, including dismissal.

When Is Dismissal Likely To Be Fair? (Employer Checklist)

Tribunals look at whether you acted like a reasonable employer in the circumstances. As a small business, you won’t be expected to run a complex process - but you should cover the essentials:

• Identify a fair reason (conduct, capability, redundancy, statutory ban, SOSR).
• Gather facts first - run a proportionate workplace investigation.
• Inform the employee in writing about the concerns and possible outcomes.
• Hold a meeting, allow a companion, and give the employee a fair chance to respond.
• Decide on appropriate action (e.g. warning, PIP, redeployment, or dismissal) and confirm the decision in writing with reasons.
• Offer the right to appeal.

For conduct issues, make sure your rules and expectations are clear in your Staff Handbook and that sanctions are consistent across your team. For performance, a structured Performance Improvement Plan (PIP) is usually the first step unless the failings are very serious.

Fair Reasons Explained: Conduct, Capability, Redundancy And SOSR

Conduct (Including Gross Misconduct)

Conduct covers behaviour such as lateness, breaches of policy, insubordination, dishonest conduct and more. For serious breaches, you may be dealing with gross misconduct, which can justify dismissal without notice. However, even where conduct appears obvious, you should still investigate and hold a hearing before deciding on any sanction.

If the misconduct is so serious that it destroys trust and confidence in the employment relationship, summary dismissal (without notice pay) can be fair - but only if you had a genuine belief in the employee’s guilt based on a reasonable investigation and you followed a fair process.

Capability Or Performance

Capability is about the employee’s ability to do the job, including performance and health. Where performance is the issue, a fair approach is to set clear, measurable targets, offer support/training, and monitor progress during a PIP. Dismissing for poor performance without prior warnings is rarely fair unless the failings are extreme.

Ill health capability dismissals require careful handling. You should obtain medical evidence, consider reasonable adjustments (especially where a disability may be involved), and explore alternatives before dismissal. Document your reasoning at each step.

Redundancy

Redundancy is fair when the role genuinely isn’t needed due to business changes (e.g. downturn, restructure, or adopting new systems). To keep a redundancy fair, consult meaningfully, use objective selection criteria, consider suitable alternatives, and pay any statutory or contractual redundancy pay. A “sham” redundancy to exit a performance issue is likely to be unfair.

Statutory Restriction And SOSR

If it becomes illegal for the employee to continue in the role (for example, loss of a necessary licence), that can be a fair reason. “Some other substantial reason” (SOSR) is a catch-all that can cover business reorganisations, third-party pressure, or an irretrievable breakdown of working relationships. A fair process still applies: consult, hear representations, consider alternatives, then decide.

What Does A Fair Procedure Look Like? Step-By-Step

A fair process is about being even-handed, transparent and reasonable - not about creating red tape. Here’s a practical sequence most small businesses can follow.

1) Investigate The Facts

Start with a proportionate, unbiased fact-finding exercise. Collect relevant documents, speak to witnesses, and keep notes. If needed to protect the business or the integrity of the process, consider employee suspension on full pay while you investigate. Suspension isn’t a sanction - explain that clearly in writing.

2) Send A Written Invite To A Hearing

Set out the allegations or performance concerns, the possible outcomes (including dismissal, if applicable), the evidence you’re relying on, and the right to be accompanied by a colleague or trade union representative. Give reasonable notice so the employee can prepare.

3) Hold The Meeting Fairly

Keep an open mind. Ask questions, consider new evidence, and adjourn if you need time to reflect or to gather more information. With performance cases, discuss realistic targets, timeframes, and support. For conduct allegations, focus on whether you have a reasonable belief based on the information available.

4) Decide On A Proportionate Outcome

Only jump to dismissal where lesser sanctions won’t work. Consider whether a first warning, final written warning, training, redeployment, or a formal PIP might be more appropriate. If dismissal is justified, decide whether it’s with notice (or payment in lieu) or, in gross misconduct cases, without notice.

5) Confirm In Writing And Offer An Appeal

Send a letter summarising the issues, the findings, your reasoning, and the sanction, plus the right and deadline to appeal. Where possible, a different manager should hear any appeal to ensure independence.

6) Keep Records

Good notes and letters are your best defence if the decision is challenged. Record what you considered, who you spoke to, what policies apply, and why alternatives weren’t suitable. This documentation shows you acted reasonably.

Common Mistakes That Make A Dismissal Unfair

Even where you have a fair reason, process errors can tip the balance. Watch out for these pitfalls:

• Skipping the investigation or failing to share evidence before the meeting.
• Predetermining the outcome or not genuinely considering the employee’s response.
• Inconsistent treatment compared to similar cases without a good reason.
• Not following your own policies in your Staff Handbook (e.g. timeframes, stages, right to appeal).
• Using redundancy to manage performance concerns (risk of unfair dismissal and protective awards for lack of consultation).
• Overlooking reasonable adjustments where disability may be relevant (risk of discrimination claims).
• Failing to consider length of service, live warnings and mitigating factors when choosing a sanction.
• Dismissing for a first offence where a warning would have been reasonable (unless gross misconduct).

If you need to move quickly, remember that “quick” and “fair” aren’t mutually exclusive. A focused investigation and a prompt, well-structured hearing can still be fair and defensible.

Do Different Rules Apply For Short Service Or Probation?

Employees generally need two years’ continuous service to bring an ordinary unfair dismissal claim. That means for short-service employees (including those on probation), the risk of an unfair dismissal claim is lower. However, day-one rights still apply:

• Automatically unfair reasons (e.g. health and safety complaints, whistleblowing, family leave) don’t require two years’ service.
• Discrimination claims don’t require any qualifying service.
• You should still pay notice (or PILON) and accrued holiday, unless a genuine gross misconduct dismissal applies.

While the legal risk profile is different, following a simplified fair process is still good practice. It protects your culture and reduces disputes.

Essential Documents To Keep Your Process Fair

Clear documents make it easier to act consistently and defend your decisions. At a minimum, have:

• Employment Contract - set out duties, conduct standards, notice periods, and a right to suspend and to make payment in lieu of notice (PILON).
• Staff Handbook - include disciplinary, grievance and capability procedures, absence management, and standards of conduct.
• Performance frameworks - use a structured Performance Improvement Plan for capability issues.
• Investigation documents - terms of reference, interview notes, evidence lists, and an investigation report to support any disciplinary steps.
• Warning and outcome letters - clear, consistent templates for first written, final written, and dismissal outcomes.

Where there’s a serious allegation, plan your workplace investigations carefully. In some cases, you may also need to consider interim steps such as employee suspension.

Real-World Scenarios: What Fair Dismissal Looks Like

Scenario 1: Repeated Lateness And Warnings

Your café manager has been repeatedly late despite an initial verbal and then written warning. You invite them to a hearing, present timekeeping records, and they don’t provide good reasons. You issue a final written warning with clear expectations and monitoring. They improve for a while, then lapse again. After another hearing, you dismiss with notice. In this scenario, the reason (conduct) and the incremental, documented process are likely to be viewed as fair.

Scenario 2: Data Theft (Gross Misconduct)

An employee emails a customer list to their personal account. You investigate quickly, secure IT evidence, and interview the employee. After a disciplinary hearing, you find gross misconduct and dismiss summarily. Because you investigated and followed a fair procedure, a tribunal is more likely to find the dismissal fair, despite the lack of notice. If in doubt, sanity-check your approach against the principles in gross misconduct and summary dismissal.

Scenario 3: Underperformance In A New Role

Your sales hire isn’t meeting targets after three months. You set a PIP with support and review points. Performance still falls short. You hold a capability hearing and consider redeployment but none is suitable. You dismiss with notice and confirm reasons in writing with an appeal right. With that trail of support and reasonableness, the dismissal is more likely to be fair. If you need a structured approach, use a Performance Improvement Plan.

Practical Tips To Reduce Risk And Cost

• Stick to your policies. Consistency is key to fairness.
• Keep it proportionate. Match the process and sanction to the seriousness of the issue.
• Communicate clearly. Employees should understand the concerns, the process and potential outcomes.
• Offer an appeal. It corrects errors and shows fairness.
• Consider alternatives. Warnings, training, or redeployment may be more appropriate than dismissal in some cases.
• Use good templates. Clear contracts and policies reduce ambiguity and disputes when you need to end an employment contract.
• Move at the right speed. Don’t rush, but don’t let issues drift - timely action supports fairness and business continuity.

Key Takeaways

• “Fair dismissal” requires a fair reason and a fair process. The usual fair reasons are conduct, capability, redundancy, statutory restriction and SOSR.
• A reasonable investigation, a hearing with proper notice, a balanced decision, and a right of appeal are the core elements of a fair procedure.
• Reserve dismissal for when lesser sanctions won’t work; in gross misconduct cases, summary dismissal may be fair if you’ve investigated and followed process.
• Well-drafted documents do the heavy lifting: an Employment Contract, a robust Staff Handbook, and consistent warning and outcome letters are essential.
• Avoid common pitfalls: inconsistent treatment, skipping investigations, ignoring reasonable adjustments, or disguising performance issues as redundancy.
• If a situation is complex or high-risk, get tailored advice before acting - it’s usually far cheaper than dealing with a claim after the fact.

If you’d like help planning a fair process or reviewing your contracts and policies, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.