Medical Capability Dismissal: The Process That Stands Up

An employee has been off work for five months. The occupational health report came back last week and it is not the clear answer anyone was hoping for: some improvement is possible, the timescale is uncertain, and a return to the full role looks unlikely inside the next six months. The team has absorbed the work. He has eleven years' service and nobody has a bad word to say about him.

So the managing director reads the report a third time and asks the only question that matters, which is whether to start a formal process now or whether waiting another two months would be the fairer thing to do. It is a real question and it deserves a straight answer. Waiting is very rarely the fairer option, and the reason has less to do with commercial pressure than most people assume.

Long-term sickness is one of the few areas of employment where the kind instinct and the legally safe one pull in different directions. Every month an absence runs without a process, the medical picture ages, the informal cover hardens into precedent, and the range of decisions the business can still defend gets narrower. An employer who finally acts at fourteen months is judged against fourteen months of having behaved as though the situation was acceptable.

What medical capability means, and where employers get it wrong

Capability is one of the potentially fair reasons for dismissal in UK employment law, and it covers the situation where an employee is unable to perform their job duties because of ill health. The phrase employers reach for is medical capability dismissal. The important word in it is capability, because this is a decision about whether the work can be done, and effort and conduct belong in a different process entirely.

Which of the two you are actually dealing with is worth settling before anyone books a meeting, because the processes diverge almost immediately and the wrong one cannot be corrected halfway through.

Acas puts the starting position plainly. An employer should, in its words, take steps to avoid dismissing an employee on capability grounds, which means a process that opens with support and adjustment and only arrives at dismissal once the alternatives have been worked through and found wanting.

Where a dismissal is challenged, the tribunal asks whether the employer acted reasonably in all the circumstances, and it assesses that against the size and administrative resources of the business. A forty-person fabrication company is not held to the standard of a national employer with an in-house occupational health function. That allowance is real and smaller businesses should use it. It gets read, far too often, as permission to run a thinner process, which is a different thing altogether.

A fit note will not tell you what you need to know

Four things have to be understood before any decision is contemplated: the nature of the condition, the realistic prognosis, the effect on the specific duties of this role, and whether the condition is likely to meet the definition of disability under the Equality Act 2010. A GP fit note answers almost none of that. It records that the employee is unfit for work, which the business already knew.

Occupational health closes the gap, and the value of the report depends almost entirely on the quality of the referral. Ask whether the employee is fit to work and you get an answer nobody can act on. Set out what the role actually demands, the lifting, the hours, the concentration a full shift requires, then ask which of those the employee can meet now, which might become possible with adjustment, and on what realistic timescale, and you get a report a decision can be built on.

What a fit note can and cannot tell you about a long-term absence is worth understanding on its own, because an employer who treats it as medical evidence is building a decision on nothing.

One further point on evidence. Where the prognosis is genuinely uncertain, that uncertainty is itself information, and it does not entitle the employer to wait indefinitely for it to resolve. A tribunal asks what the employer knew at the point of decision, and not what became clear later.

When the condition is a disability

Where the condition meets the legal definition of disability, the Equality Act 2010 imposes a duty to make reasonable adjustments, and the range of what counts is wider than employers tend to assume. Acas gives an example that rarely occurs to anyone: not counting some or all disability-related absence towards the trigger points in an absence policy. Alongside that are the more familiar changes to duties, hours, equipment and phased returns.

Reasonable has limits. Where no suitable alternative work exists, and where the adjustments being asked for would fundamentally change what the job is, the employer is not required to invent a role the business has no need of. What it is required to do is consider the options seriously and be able to show that it did.

That evidential point is where most claims against smaller employers are lost. An adjustment weighed up in a manager's head and dismissed as impractical is worth nothing when it is challenged eighteen months later. The same adjustment discussed with the employee, costed, and recorded with a reason behind it is a defence. The work is identical. Only the record differs, and the record is the part a tribunal actually reads.

Businesses without an HR function rarely fail this because they do not care. They fail it because nobody owns the paperwork while the situation is still developing, and by the time an absence has run past the point where anyone is comfortable, the record that should exist does not.

Consultation is where these cases are won and lost

Consultation in an ill health capability procedure carries more weight than any other stage, and it is the stage employers most often compress. Before any meeting at which dismissal could be decided, the employee should understand what the concern is, what the medical evidence says, and what has been considered and ruled out. He should also know that dismissal is a possible outcome. Being told that in the room is too late.

Surprise is what makes a process feel unfair even where the underlying decision was reasonable. An employee who walks into a meeting expecting a review and walks out dismissed has a claim that does not depend on the medical position at all.

The ill health capability meeting itself deserves separate treatment, because the note taken in it is the document a tribunal reads years afterwards, and most such notes record that a meeting happened without recording a single thing that was said in it.

Alternative work, and what a small business does not have to invent

Where suitable alternative employment exists it should be offered, and the search has to be genuine and not a paper exercise run after the decision has effectively been taken. But the obligation has edges. Nobody has to be displaced to make the vacancy, and no business has to maintain a permanent light duties role when it has no light duties to give.

In a company of forty this is frequently the whole case. There may simply be no adjusted role available. Where that is the position it has to be evidenced at the time, with the roles considered and the reason each one was unsuitable written down, because a list reconstructed after the claim arrives never reads the way a contemporaneous one does.

Where the absence began with an injury at work

An absence that started with a workplace incident carries a second set of obligations, and they run alongside the capability process rather than behind it. The original incident should have been investigated, the risk assessment reviewed, and the control measures changed where the investigation showed they needed to be.

Returning someone to duties that could aggravate the injury creates a fresh exposure on top of the one already being managed. Where a business is running a capability process on an absence that began with an incident nobody fully investigated, it has two problems, and they will eventually be examined together.

There is also a balance to hold between the employee's own wish to get back to work and the medical advice on whether they should. The wish is usually sincere. On its own it is not evidence of fitness.

What changes on 1 January 2027

The risk arithmetic changes at the start of next year. From 1 January 2027 the qualifying period for unfair dismissal falls from two years to six months, and employees who already have six months' service on that date are protected immediately. And the ceiling comes off. The statutory cap on the compensatory award is removed at the same time, so compensation will be assessed against actual financial loss with nothing above it.

Two consequences follow for anyone currently managing a long-term absence. Somebody hired this summer will be able to bring a claim by January, where today they could not. And a capability dismissal that would have been an awkward but bounded risk becomes one with no upper limit attached to it. Any business running these processes on the quiet assumption that most of its staff cannot claim anyway is running them on an assumption with a date on it.

The cost of waiting

None of the above is why most capability situations go wrong. They go wrong through deferral, and deferral is the failure least likely to be recognised while it is happening, because each individual month of waiting looks defensible on its own terms.

The pattern is consistent. The medical picture ages and has to be refreshed, the team's informal cover becomes the way things are done, and the employee reasonably reads the absence of any process as a signal that his position is secure. Then the business, having behaved for a year as though the arrangement worked, has to explain why it suddenly does not. This is the same shape as every difficult call a company puts off, and the decision that keeps almost being made is usually the most expensive item on the list.

The test a tribunal applies

The question is narrower than employers expect. Did the employer understand the medical position, consider what could reasonably be changed, consult openly, and reach a conclusion that was available to a reasonable employer on the evidence it held at the time? Kindness is not part of the test, and neither is the outcome.

Run with that discipline, a medical capability dismissal can be lawful and humane at once, and the employee usually knows the conversation is coming well before the employer raises it. Run by drift, it becomes a grievance, then a discrimination claim, then a hearing about a note nobody wrote.

If you have an absence that has passed the point where waiting feels like a decision in itself, a short message gets a direct read on where the process stands and what has to happen before any meeting is booked. It comes back from Nick or the team, usually the same day.

Common questions

Can you dismiss someone for being off sick too much?

Yes, in principle, where the absence has reached the point at which the employee can no longer perform the role and the employer has followed a fair process. What makes it lawful is the established inability to do the job, supported by medical evidence and tested against reasonable adjustments, and not the number of days recorded on the absence sheet.

What does medical capability mean?

Medical capability describes the situation where an employee is unable to perform their job duties because of ill health or injury. It is one of the potentially fair reasons for dismissal in UK employment law, and it is assessed against the requirements of the specific role and not against general fitness for work.

When does capability dismissal due to ill health become fair?

Broadly, where the medical position has been established on adequate evidence, reasonable adjustments have been considered and either made or shown to be unworkable, suitable alternative work has been looked for, the employee has been consulted, and the employer has acted reasonably given its size and resources. Missing any one of those is usually enough to make the dismissal unfair.

What if the employee cannot perform their duties but is not disabled?

The Equality Act duty to make reasonable adjustments does not apply, and the fairness test under unfair dismissal law still does. Consultation, medical evidence and a genuine search for alternative work all remain necessary, and from 1 January 2027 the employee will need only six months' service to bring the claim.