Can I dismiss an employee for being off sick too long

The short answer is yes, in some circumstances. But the distance between "yes, you can" and "yes, you should" is where most employers get into trouble.

Long-term sickness absence is one of the hardest situations for a small business to manage. You care about the person. You want to be supportive. You've told them to take all the time they need. But three months in, six months in, the work isn't getting done. The team is stretched. You're paying for cover, or the work's just falling on everyone else's shoulders. And you don't know when, or if, they're coming back.

The instinct is either to wait indefinitely or to move to dismissal too quickly. Both create problems.

When dismissal is potentially fair

Employment law recognises that a business can't hold a role open forever. Capability, which includes health, is one of the five potentially fair reasons for dismissal. So yes, you can dismiss someone because they're no longer capable of doing the job due to ill health.

But "potentially fair" is doing a lot of heavy lifting in that sentence. A tribunal won't just ask whether you had a reason to dismiss. It will ask whether you acted reasonably. And reasonable, in this context, means following a process.

The process that protects you

Before you get anywhere near a dismissal decision, you need to have done several things.

Maintained regular contact. Not surveillance. Not pressure. Genuine welfare check-ins that show you care about the person while also keeping lines of communication open. How often depends on the situation, but monthly at minimum. Document every conversation.

Obtained medical evidence. An occupational health referral is essential. You need an up-to-date picture of the person's condition, their prognosis, whether they're likely to return to work, when, and whether any adjustments could facilitate a return. You can't make informed decisions without medical input, and a tribunal will want to see that you sought it.

Explored reasonable adjustments. This is where the Equality Act comes in. If the employee's condition meets the legal definition of a disability, and many long-term conditions do, you have a duty to make reasonable adjustments. That might mean a phased return, amended duties, different hours, or workplace modifications. What's reasonable depends on the size and resources of your business, but you need to show you considered it.

Held a formal meeting. Before making any decision about the person's employment, you should hold a meeting with them (or their representative) to discuss the situation, the medical evidence, any further adjustments, and the potential outcomes, including dismissal. They need the chance to put their case.

The disability question

This is where it gets legally complex. The Equality Act defines a disability as a physical or mental impairment that has a substantial and long-term adverse effect on a person's ability to carry out normal day-to-day activities. "Long-term" means lasting, or likely to last, at least 12 months.

If someone's been off sick for several months with a condition that's likely to continue, there's a reasonable chance it meets the definition. Cancer, HIV, and MS are automatically classified as disabilities regardless of their effect.

Why does this matter? Because if you dismiss someone whose absence is related to a disability without making reasonable adjustments and following a proper process, you're not just facing an unfair dismissal claim. You're facing a discrimination claim. And discrimination claims have no cap on compensation.

This isn't designed to make you feel paralysed. It's designed to make you take the process seriously. The process exists to protect the employee, but it also protects you. An employer who can show they maintained contact, obtained medical evidence, explored adjustments, and gave the employee a fair hearing before making a decision is in a strong position, even if the outcome is dismissal.

What to do if you're in this situation right now

If you've got an employee who's been off sick for a prolonged period and you're not sure what your options are, the worst thing you can do is either ignore it or act impulsively. Get advice. Understand the medical position. Understand your legal obligations. Then make a decision from an informed position rather than a frustrated one.

A 30-minute conversation at the right point can save months of difficulty and significant legal cost.

Book a free discovery call with King HR Advisory.