Dismissed while on sick leave? You may have a strong claim

Being ill is not a reason to dismiss someone unfairly. Employers regularly rush dismissals during sick leave without proper medical evidence, without exploring alternatives, and without giving the employee a real chance to respond. If that happened to you, the Employment Tribunal can award compensation.

Dismissed while on sick leave? You likely have a strong claim

Check your sick leave dismissal rights

Can I be dismissed while on sick leave?

Yes, but dismissal during sick leave is subject to the same legal standards as any other dismissal. After two years of continuous employment you have full unfair dismissal protection. Your employer must have a fair reason and follow a fair procedure — simply being absent through illness is usually not enough on its own.

Is dismissal while on sick leave automatically unfair?

Not automatically, but it is frequently unfair in practice. Tribunals look at whether the employer carried out a proper investigation, obtained medical evidence, considered alternatives to dismissal, and gave you the opportunity to make representations. Skipping any of these steps can make a dismissal unfair.

Can I claim disability discrimination if dismissed on sick leave?

Yes, if your illness amounts to a disability under the Equality Act 2010 (a physical or mental impairment with a substantial and long-term adverse effect on normal day-to-day activities). Dismissing a disabled employee without making reasonable adjustments is disability discrimination — and there is no compensation cap on discrimination awards.

What if my employer replaced me while I was off sick?

Replacing someone while they are on sick leave is a significant indicator of unfair dismissal. It can suggest the decision to dismiss was made before any proper process was followed. It is also potentially disability discrimination if your absence was related to a disability.

What is the time limit to claim if dismissed on sick leave?

3 months less one day from the effective date of termination (usually your last day of employment or the date notice expired). ACAS Early Conciliation must be started before filing at the Employment Tribunal.

How long does sick leave have to be before the Equality Act applies?

A condition qualifies as a disability under the Equality Act 2010 when it has a substantial and long-term adverse effect on normal day-to-day activities. "Long-term" means it has lasted or is likely to last 12 months or more. If your condition has lasted less than 12 months but is likely to recur or continue, it may still qualify. Cancer, HIV, and MS are automatically disabilities from the point of diagnosis regardless of duration.

What medical evidence do I need for a sick leave dismissal claim?

For an unfair dismissal claim: fit notes (sick notes), any occupational health reports your employer obtained or should have obtained, and GP or specialist letters confirming your diagnosis and prognosis. For a disability discrimination claim: evidence that your condition has or is likely to have lasted 12 months and that it substantially affects normal day-to-day activities. A consultant or specialist letter is stronger than a GP letter alone. Gather all medical evidence before the tribunal hearing — you cannot easily introduce new evidence afterwards.

What does the ACAS Code say about disciplinary proceedings during sick leave?

The ACAS Code of Practice on Disciplinary and Grievance Procedures applies to all disciplinary proceedings, including those that take place when an employee is on sick leave. The Code requires the employer to carry out a reasonable investigation, inform the employee in writing of the allegations, hold a disciplinary meeting, allow the employee to be accompanied, and offer a right of appeal. Following the Code is not optional — tribunals can uplift compensation by up to 25% where an employer unreasonably fails to follow it.

Dismissed on sick leave

Dismissed while on sick leave? You may have a strong claim

GOV.UK dismissal guidance

Last updated: April 2026

Service needed for unfair dismissal — day one for discrimination

Disability discrimination awards have no statutory limit

Time limit to start your ACAS Early Conciliation

What "automatically unfair dismissal" means when dismissed on sick leave

Under section 98 of the Employment Rights Act 1996, some dismissals are automatically unfair — meaning the tribunal does not need to consider whether the employer acted reasonably, and there is no two-year qualifying period required. Certain sick leave situations fall into this category.

A dismissal connected to pregnancy or maternity leave is automatically unfair. If you were on sick leave because of a pregnancy-related condition and your employer dismissed you, that dismissal is automatically unfair regardless of your length of service. The same applies if your employer dismissed you for taking, or asking to take, any form of family leave (paternity, shared parental, adoption).

Outside those specific protections, a dismissal during sick leave is not automatically unfair under the general unfair dismissal provisions — but it is frequently unfair in practice, because employers fail to follow the process that makes a capability dismissal fair. The distinction matters: an automatically unfair dismissal carries a minimum basic award and requires no qualifying period; a standard unfair dismissal requires two years of continuous service.

Less than two years service?

If you have been employed for less than two years, you do not have ordinary unfair dismissal rights — but you may still have a claim if your dismissal was connected to a protected characteristic (disability, pregnancy, race, sex, religion, age, sexual orientation). Discrimination claims do not require any minimum length of service. If your sick leave was caused by a disability or a pregnancy-related condition, you can bring a discrimination claim from your first day of employment.

What makes a sick leave dismissal unfair?

Tribunals apply the general unfair dismissal test: did the employer have a potentially fair reason (capability is the most common for sickness), and did they act reasonably in treating that reason as sufficient to dismiss? In the context of long-term or repeated sickness absence, tribunals look for the following steps:

Medical evidence must be obtained

The employer must obtain proper medical evidence — usually an occupational health report or a GP or specialist letter — before deciding to dismiss. Dismissing without any medical evidence is almost always unfair. An occupational health referral is not a box-ticking exercise: the report must be genuinely considered. If the employer received an occupational health report but ignored its recommendations (for example, a recommendation for phased return), that failure can make the dismissal unfair.

Prognosis and realistic return date

The employer must consider the prognosis: is there a genuine prospect of return to work and, if so, when? If the medical evidence suggests a return within a reasonable period, dismissal may not be justified at that stage. What is "reasonable" depends on the circumstances — the size of the business, the nature of the role, and the impact of the absence. A large employer with 500 staff has less justification for dismissing after three months than a small business of six people where the absent employee's role cannot be covered.

Genuine exploration of alternatives

Has the employer considered phased return (starting back part-time), adjusted duties (removing aspects of the role that the medical evidence suggests you cannot currently do), reduced hours, or a different role within the business? Dismissing without genuinely exploring these alternatives — especially where the employee is disabled — is a significant procedural failing. The word "genuinely" matters: asking "can you do any other job?" at the end of a meeting that was already heading towards dismissal is not genuine exploration.

Real consultation with you

The employer must consult with you before dismissing — explain the situation, share the medical evidence (including any occupational health report), and give you a genuine opportunity to respond. You should be told that dismissal is being considered and given a chance to make representations. A sham "meeting" with a dismissal letter already drafted is not proper consultation. You also have the right to be accompanied at a formal meeting by a colleague or trade union representative.

You must be offered a right of appeal against the decision to dismiss. Denial of an appeal right is a clear procedural failing that strengthens a tribunal claim. If you were offered an appeal and used it, the appeal outcome letter and any meeting notes should be in your tribunal bundle.

The ACAS Code and disciplinary proceedings during sick leave

The ACAS Code of Practice on Disciplinary and Grievance Procedures (the "ACAS Code") sets out the minimum fair process for disciplinary proceedings. It applies whether the disciplinary matter arose before your sick leave or during it. Tribunals take the Code seriously: failure to follow it allows the tribunal to uplift any compensation award by up to 25%.

The Code requires the employer to:

These requirements apply even if you are on sick leave. An employer cannot skip the formal process on the basis that you are not at work. The meeting can be held by video call or rescheduled to a time when you are well enough to attend. If you are too unwell to attend any form of meeting, the employer should wait a reasonable period before proceeding — dismissing while you are in hospital or immediately after surgery, without any meeting, is a serious procedural failure.

25% uplift for ACAS Code breach

If the tribunal finds that the employer unreasonably failed to follow the ACAS Code, it can increase the compensation award by up to 25%. This applies to both the compensatory award and any other element of the award that flows from the disciplinary process. It is one of the most commonly overlooked arguments in self-represented claims — always check whether the employer followed the Code step by step.

Disability discrimination — a separate and stronger claim

If your sickness absence was caused by a condition that amounts to a

under the Equality Act 2010, you have a separate — and potentially much stronger — disability discrimination claim. A disability is a physical or mental impairment that has a substantial and long-term adverse effect on normal day-to-day activities.

means the condition has lasted, or is likely to last, 12 months or more. It does not mean it has already lasted 12 months by the time you are dismissed. If your condition started four months before dismissal but medical evidence shows it is likely to continue for at least another eight months, it already qualifies as long-term. Conditions that recur are also covered — if a condition has recurred and is likely to recur, it counts as long-term even if it is not continuous.

means more than trivial. This is a low bar. If your condition makes daily activities — walking, concentrating, sleeping, managing stress — noticeably harder than they would be for a non-disabled person, it is likely to qualify.

Many conditions that employees do not think of as disabilities qualify under this definition: depression, anxiety disorder, chronic back pain, irritable bowel syndrome, fibromyalgia, ME/CFS, long COVID, ADHD, and many others. Cancer, HIV, and MS are automatically disabilities from the point of diagnosis regardless of how long they have lasted.

No compensation cap for disability discrimination

Disability discrimination claims carry no statutory cap on compensation. Awards include financial losses (past and future earnings) and injury to feelings — the Vento bands set the range for injury to feelings depending on the severity of the discrimination. The lower Vento band starts at £1,200; the upper band goes to £58,700 for the most serious cases. For comparison, ordinary unfair dismissal is capped at £123,543 for the compensatory award. Our free Vento bands calculator shows you which band applies to your situation.

What medical evidence do you need?

Medical evidence does two jobs in a sick leave dismissal claim. First, it establishes the nature of your condition and supports the argument that the employer should have done more before dismissing. Second, in a disability discrimination claim, it establishes that your condition meets the legal definition of a disability under the Equality Act 2010.

Fit notes (sick notes)

Fit notes from your GP are the baseline. They establish that you were medically signed off work and for how long. If your GP amended a fit note from "not fit for work" to "may be fit for work" with conditions (reduced hours, adjusted duties), that is significant evidence that the employer should have explored a phased return.

Occupational health reports

If your employer referred you to occupational health, that report is important evidence. It usually includes a diagnosis, a prognosis (expected recovery timeline), and recommendations about what adjustments might allow a return. If the employer ignored those recommendations and dismissed you anyway, that is strong evidence of unfair dismissal.

GP or specialist letters

A letter from your GP or a hospital specialist confirming your diagnosis, the duration of your condition, and its impact on your daily life is important evidence for a disability discrimination claim. It is stronger if it addresses the Equality Act criteria directly — substantial, long-term, adverse effect on day-to-day activities.

Psychiatric or psychological assessments

For mental health conditions (depression, anxiety, PTSD, OCD), a report from a psychiatrist or clinical psychologist carries more weight than a GP letter. If you were referred to talking therapies (IAPT/NHS Talking Therapies), records of those referrals and sessions can support your claim.

Gather all medical evidence before your tribunal hearing. You can also apply to the tribunal for permission to obtain a medical report from an independent expert — useful if your own GP records are incomplete or if you need a specialist opinion on whether your condition meets the Equality Act definition.

Common employer mistakes that make sick leave dismissal unfair

These are the most frequently cited employer failings in tribunal decisions about sick leave dismissal. If any of these apply to your situation, note them carefully — they are the building blocks of your claim.

Dismissing without any medical evidence

The starting point for any capability dismissal is medical evidence. Dismissing without an occupational health report or any medical input — relying solely on the absence record — is almost always unfair. The tribunal will ask: what did the employer know about the prognosis, and what did they do with that information?

Ignoring the occupational health report

Commissioning an occupational health report and then ignoring its recommendations is arguably worse than not commissioning one at all. It shows the employer went through the motions without engaging with the outcome. If OHR recommended a phased return and the employer dismissed instead, that is strong evidence of unfair dismissal.

Failing to consider reasonable adjustments

For disabled employees, failure to consider reasonable adjustments before dismissing is both unfair dismissal and a failure to make reasonable adjustments under the Equality Act. "Reasonable" depends on cost, practicality, and the size of the business — but the employer must at minimum have genuinely considered them and documented why each was impractical.

Dismissing after a short period of absence — particularly where the medical evidence shows a prospect of recovery — suggests the decision was driven by impatience rather than a genuine assessment. Tribunals look at whether the employer waited a reasonable time before concluding that the employment relationship could not continue.

Not consulting properly

Holding a meeting that is procedurally a consultation but substantively a notification of dismissal is not proper consultation. The employee must genuinely be told that dismissal is under consideration and given a real opportunity to influence the outcome — not just hear the decision read out.

Replacing the employee before dismissing

Advertising for or appointing a replacement before the dismissal meeting has taken place is strong evidence that the decision was made before the process. It undermines any argument that the meeting was a genuine consultation.

Failing to offer an appeal

The appeal is a mandatory step under the ACAS Code. Failure to offer one is a standalone breach that can result in a 25% uplift in any compensation award. Even if you are dismissed and offered an appeal, and the appeal upholds the dismissal, the fact that an appeal was held can slightly reduce any Polkey deduction.

Free calculators — estimate your compensation

Two free tools that are particularly relevant to sick leave dismissal claims. No sign-up, no card — results appear instantly.

Schedule of Loss calculator

Estimates your basic award, compensatory award, notice pay, and holiday pay using current statutory figures (April 2026: weekly cap £751, compensatory cap £123,543). The schedule of loss is a document you file at tribunal — this calculator gives you the numbers.

Vento bands calculator

If your claim includes disability discrimination, you may be entitled to an injury to feelings award on top of your financial losses. The Vento bands set the range — lower, middle, or upper — depending on the severity of the discrimination. This calculator shows which band applies to your situation and what the current 2026 figures are.

Sick leave dismissal — questions answered

Start My Claim is self-service software, not a law firm and not a regulated Claims Management Company. The information on this page is for general guidance only and does not constitute legal advice. If your situation is complex or you are unsure about your rights, consider consulting a qualified employment solicitor.

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