Capability dismissal: your rights and what a fair process looks like

Capability is one of the five potentially fair reasons for dismissal under section 98 of the Employment Rights Act 1996. It covers your ability to do the job, judged by "skill, aptitude, health or any other physical or mental quality", plus whether you hold the qualifications the role needs.

Potentially fair is not the same as fair. Your employer still has to show it acted reasonably, and that almost always comes down to process. ACAS guidance is blunt: if it is a capability issue, employers should support you to improve first, and dismissal should be a last resort.

The three types of capability dismissal

• Poor performance. You are trying, but your work is not meeting the standard. This is different from misconduct, where you are choosing not to follow rules. Most employers manage it through a performance improvement plan.
• Ill health. Long-term sickness or frequent short absences mean you cannot do the job, or cannot do it reliably. See our guide to ill health dismissal.
• Qualifications. You lose a licence or professional registration the job legally requires, such as a driving licence for a delivery role.

What a fair performance process looks like

A tribunal will ask whether a reasonable employer would have dismissed in the circumstances. For poor performance, that normally means your employer:

• Told you clearly what the problem was, with examples, not vague comments about "attitude"
• Set a realistic standard and a fair timescale to reach it, usually weeks or months, not days
• Offered support, such as training, supervision, mentoring or reduced workload
• Reviewed progress in meetings, with notes, and warned you in writing of the consequences
• Held a formal hearing before dismissing, where you could respond and bring a companion
• Considered alternatives, like a different role or more time, before dismissing
• Offered an appeal

Most capability procedures run through warnings in the same way a disciplinary at work does: first written warning, then a final written warning, then dismissal if things still do not improve. ACAS suggests that if you improve but not to the agreed level, a final warning rather than dismissal is often the right next step.

When capability dismissals become unfair

The most common problems we see:

• Moving goalposts. Targets that shift each time you get close to meeting them.
• A plan designed to fail. Unachievable targets, two-week deadlines, or a PIP that appears straight after you raise a grievance.
• No support. You were told to improve but given nothing to help you do it.
• Ignoring the real cause. Performance dipped because of a health condition, workload, or bullying, and your employer never asked why.
• No warning. You were dismissed for performance without ever being told dismissal was on the table. See sacked without warning.

Where disability comes in

If your performance or absence is linked to a condition that counts as a disability, the Equality Act 2010 adds a separate layer of protection. Your employer must make reasonable adjustments, and dismissing you because of something arising from your disability is unlawful unless they can justify it. Discrimination claims have no qualifying period and no cap on compensation. Our guide to disability discrimination explains the tests.

Do you have enough service to claim?

Right now, ordinary unfair dismissal needs two years' continuous service. The Employment Rights Act 2025 cuts that to six months where the effective date of termination is on or after 1 January 2027. If you are close to either line, the exact dates matter, so check our qualifying period guide.

If you are still in your first months, or being let go at the end of a trial period, read dismissed during probation. Discrimination protection applies from day one regardless.

What a claim could be worth

A successful unfair dismissal claim has two parts:

• Basic award: based on age, service and weekly pay, with weekly pay capped at £751. The maximum is £22,530.
• Compensatory award: your actual losses, mainly lost earnings until you find similar work.

Worked example: Sam, 42, earned £650 a week and had six years' service. He was dismissed after a four-week PIP with no training and no warning. His basic award is 6 x 1 x £650 = £3,900. He took five months to find a job at the same pay, so lost earnings were roughly £14,000, plus loss of statutory rights. If his employer also ignored the ACAS Code, a tribunal can increase compensation by up to 25%.

Many capability cases settle before tribunal through an offered settlement agreement. The time limit is tight: you normally have three months less one day from dismissal to start ACAS early conciliation.

Capability or misconduct: why the label matters

Employers sometimes treat a performance problem as misconduct, because a disciplinary route can feel quicker. That is a mistake on their part. Misconduct is about deliberate behaviour; capability is about ability. If you are genuinely trying and struggling, being disciplined as though you were refusing to work is a sign the process is wrong, and a tribunal will look at whether the employer chose the right procedure. The reverse also happens: an employer may say "performance" when the real issue is a conflict with a manager, a protected characteristic or a complaint you made.

Your right to be accompanied

At a formal capability hearing that could lead to a warning or dismissal, you have a legal right to bring a colleague or trade union representative. Your companion can put your case, sum up and confer with you, though they cannot answer questions on your behalf. If your employer refuses, a tribunal can award up to two weeks' pay (capped at £751 a week). Ask for any meeting to be rearranged if your companion cannot attend, and request the evidence in advance so you are not ambushed.

Common questions

Can I be dismissed for performance with no PIP? Possibly, but a dismissal without any warning or chance to improve is usually hard to defend for an employee with qualifying service. Senior staff are sometimes expected to know the standard without a formal plan, but they still need to be warned.

Can my employer rely on old warnings? Usually only live warnings within the period the policy sets, often 6 to 12 months.

What to do now

• Ask for the performance concerns, targets and any capability policy in writing
• Keep your own record of meetings, support promised and support actually given
• Tell your employer in writing about any health issue affecting your work
• Appeal any dismissal, in writing, within the deadline

If you think the process is unfair or the real reason is something else, get advice before the time limit runs. Match My Solicitor matches you with an employment solicitor who handles capability dismissals regularly, and the first conversation is free. Tell us what happened and we will match you within 24 hours, or read more about our unfair dismissal service.