Dismissing an employee for poor performance is a sensitive process. It requires careful adherence to UK employment law to ensure fairness.
Many employers ask: can an employee be dismissed for poor performance?
The answer is yes, but only if you follow a fair procedure.
Poor performance falls under “capability,” one of the potentially fair reasons for dismissal. Failing to handle this correctly can lead to unfair dismissal claims.
This guide explores how to dismiss an employee for poor performance in the UK. It covers legal requirements, best practices, how to follow ACAS guidelines on performance management and common pitfalls.
Understanding Poor Performance as a Fair Reason for Dismissal
Capability is a recognised fair reason for dismissal under UK law. This includes situations where an employee cannot perform their job to the required standard.
It differs from misconduct, which involves behaviour issues. Poor performance might stem from lack of skills, training, or other factors.
Employers must show they genuinely believed the employee was incapable. This belief must be based on reasonable grounds.
Evidence is crucial here. Without clear documentation, defending a claim becomes difficult.
Can I dismiss an employee for poor performance without warnings? Generally, no. You must give opportunities to improve first.
Instant dismissal for poor performance is rare and risky.

Identifying and Documenting Poor Performance Early
Early intervention is key when addressing how to dismiss an employee for poor performance. Start with informal discussions and raise concerns promptly.
Provide specific examples of where performance falls short. Set clear expectations and document these conversations.
This builds a paper trail. Regular appraisals help spot issues early.
Compare performance against objective standards. Consider underlying causes, such as health problems or personal issues.
If linked to disability, reasonable adjustments are required. Failing to investigate causes can make dismissal unfair.
Implementing a Performance Improvement Plan (PIP)
A formal PIP is essential in most cases. This gives the employee a structured chance to improve.
Outline specific, measurable targets. Set realistic timescales and provide support, such as training or mentoring.
Review progress regularly. Hold meetings to discuss advancements and adjust the plan if needed.
A typical PIP lasts several weeks or months, depending on the role and issues. Warn that failure to improve may lead to further action, including potential dismissal.
Employees have the right to be accompanied at formal meetings.

Following a Fair Disciplinary Procedure
Follow the Acas Code of Practice on disciplinary and grievance procedures. This is vital for fairness.
Investigate fully before any formal action. Inform the employee in writing of the concerns.
Invite them to a formal meeting and allow them to respond. Consider their input carefully.
Issue warnings if improvement is insufficient. Typically, a first written warning, then a final written warning.
Each warning should state consequences of no improvement. Provide appeal rights at each stage.
Dismissing an employee for poor performance usually requires warnings first.
How to Dismiss an Employee for Poor Performance UK: The Formal Dismissal Process
If improvement does not occur after warnings, hold a final meeting. Warn that dismissal is possible and give the employee chance to respond.
Decide based on all evidence. If dismissing, provide notice or payment in lieu.
Confirm in writing, with reasons. Offer right of appeal.
A different manager should handle the appeal. This ensures impartiality.
Special Considerations: Health, Disability, and Protected Characteristics
If poor performance links to health, explore adjustments thoroughly. Long-term sickness may require separate procedures, but overlapping with capability is common.
For disabilities, failure to adjust can lead to discrimination claims. Pregnancy or maternity-related issues need careful handling.
Avoid automatic unfair dismissal risks. Consult experts if unsure.

Risks of Getting It Wrong: Unfair Dismissal Claims
Unfair dismissal claims arise if procedure is flawed, even with genuine poor performance. Tribunals consider if you acted reasonably.
Compensation can be awarded, plus uplifts for not following Acas Code. Employees with sufficient service can claim.
Wrongful dismissal may also apply for notice breaches. Mitigate risks by documenting everything and seeking advice early.
Alternatives to Dismissal
Explore redeployment where possible. Consider demotion or role changes.
These might resolve issues without dismissal. Mutual agreement can help, but forced changes risk claims.
How Emberscale Can Support Your HR Needs
Navigating how to dismiss an employee for poor performance can be complex. Many businesses lack in-house expertise.
This is where outsourced solutions help. Emberscale specialises in outsourcing business solutions for multiple B2B services.
We provide expert support to streamline processes. Our services include:
HR Services
Our HR services encompass compliance advisory, policy development, and employee relations management.
We handle everything from onboarding to exit processes, ensuring adherence to UK employment law.
This proactive approach substantially reduces tribunal exposure by embedding best practices.
Custom audits identify gaps, while ongoing support keeps your team aligned.
Recruitment
Emberscale’s recruitment solutions deliver efficient talent acquisition without the overheads.
We source, screen, and onboard candidates tailored to your needs.
Our methods prioritise diversity and fairness, minimising bias claims.
Partnering with us means accessing a vetted pool, faster than in-house efforts.
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Elevate your team’s performance through our bespoke sales training programmes.
We cover negotiation, objection handling, and closing techniques.
Delivered via workshops or online modules, these sessions boost revenue while fostering ethical selling.
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Contact Emberscale
If you’re looking for expert support, Emberscale is here to help.
UK contact number: 020 3432 2025
US contact number: 888-400-9953

Q&As on How to Dismiss an Employee for Poor Performance UK
Q1: Can an employee be dismissed for poor performance without any warnings?
No. In almost all cases, UK law requires employers to follow a fair process, including informal discussions, a Performance Improvement Plan, and formal warnings before dismissal. Instant dismissal for poor performance is rarely fair and could lead to an unfair dismissal claim.
Q2: How long should a Performance Improvement Plan last when dismissing an employee for poor performance?
The length varies depending on the role and issues, but it is typically between 4 and 12 weeks. It must be realistic and give the employee a genuine opportunity to improve, with regular reviews and support.
Q3: Can I dismiss an employee for poor performance if it’s linked to a health condition?
You must proceed with extreme caution. If the poor performance relates to a disability or long-term health issue, you have a duty to make reasonable adjustments. Failing to do so could result in a disability discrimination claim alongside any unfair dismissal claim.
Q4: What happens if an employee improves during a PIP but then performance drops again?
You can restart or extend the capability procedure. Issue a further warning or move to the next stage, ensuring you document the relapse and give another clear opportunity to sustain improvement.
Q5: Is it possible to dismiss an employee for poor performance during their probation period?
Yes, probationary periods usually allow simpler processes with shorter notice and fewer formal steps. However, you must still act reasonably, provide feedback, and avoid discrimination.











