Long-term sickness absence is one of the most legally and operationally demanding situations an employer faces. It sits at the intersection of employment law, occupational health, disability discrimination, contractual obligations, and straightforward human complexity. Handled well, it protects both the employee and the business. Handled badly, it creates tribunal claims, reputational damage, and — often — the same outcome you were trying to avoid, but at far greater cost.
Defining long-term absence
There is no statutory definition of "long-term" sickness absence. Most HR practitioners and employment tribunals treat four weeks as a working threshold — at that point, the nature of the management task changes materially and different processes apply.
The first four weeks — what you should be doing
Many employers make the mistake of leaving the employee alone in an attempt to be considerate — and then finding, weeks later, that there has been no meaningful communication, no understanding of the prognosis, and no process in place. Welfare contact is not harassment. It is good management.
- Make welfare contact within the first week — a phone call or message, not a formal letter. The tone should be genuinely supportive, not administrative.
- Continue regular contact throughout the absence — typically fortnightly, depending on the condition and the employee's wishes.
- Keep brief, factual records of every contact: date, medium, what was discussed, what was agreed.
- Ask whether there is anything the business can do to support an earlier or phased return — but do not pressure the employee towards a date.
- Ensure the employee knows what their contractual and statutory sick pay entitlement is, and when it will expire.
Getting medical evidence
Fit notes tell you that an employee is unfit for their current role. They do not tell you what the prognosis is, whether adjustments could enable a return, or how long the absence is likely to continue. For managing long-term absence, you need more.
- Occupational Health (OH) referral. An OH assessment considers the employee's condition in the context of their job and working environment. OH can advise on return timescales, reasonable adjustments, and fitness for specific duties. If you do not have in-house OH, use an external provider — this is not optional for long-term absences.
- GP or specialist report. You can request a report under the Access to Medical Reports Act 1988. The employee has the right to see the report before it is sent and can refuse permission. If they refuse, you manage on the information available — but document that a request was made and declined.
Reasonable adjustments — what the duty requires
If the employee's condition qualifies as a disability under the Equality Act 2010 — and many long-term conditions will — you have a positive duty to consider and implement reasonable adjustments. Common adjustments include:
- Phased return to work over an agreed period.
- Temporary reduction in hours or amended start/finish times.
- Reallocation of specific tasks or responsibilities that the employee cannot currently perform.
- Remote or hybrid working arrangements.
- Redeployment to a different role within the business where suitable alternatives exist.
- Equipment or workspace modifications.
Document that you considered adjustments, what you considered, why each was or was not appropriate, and what you decided. The paper trail matters enormously if the situation later becomes contentious.
The capability process — when and how
Where absence is prolonged with no reasonable prospect of return within a timescale the business can sustain, a formal capability process may be appropriate. This is not a disciplinary process — the absence is not the employee's fault, and the process must reflect that.
Dismissal for capability — the legal test
Dismissal for long-term ill health is a potentially fair reason under the Employment Rights Act 1996 — specifically, capability relating to health. A tribunal will ask whether dismissal fell within the range of reasonable responses available to a reasonable employer. The factors that determine reasonableness include:
- Whether adequate medical evidence was obtained and considered.
- Whether the employee was consulted and given a genuine opportunity to contribute.
- Whether reasonable adjustments were considered.
- Whether alternatives to dismissal were genuinely explored.
- The nature of the business and how long the absence can practically be sustained.
- Whether the employee was given fair warning that dismissal was being considered.
Disability and the Equality Act 2010 — the risks you must not ignore
A condition is a disability under the Equality Act if it has a substantial and long-term adverse effect on the ability to carry out normal day-to-day activities. Many conditions that cause extended absences — depression, anxiety, cancer, MS, Crohn's disease, back conditions — will meet this test. The relevant claims are:
- Direct discrimination: Treating an employee less favourably because of their disability.
- Discrimination arising from disability (s.15): Treating an employee unfavourably because of something arising in consequence of their disability — for example, dismissing for absence where that absence is caused by the disability.
- Failure to make reasonable adjustments.
- Indirect discrimination: Applying a policy that puts disabled employees at a particular disadvantage.
Process checklist
- Welfare contact within week one; regular, documented contact throughout.
- OH referral or GP/specialist report at the four-week mark.
- Consider whether the Equality Act 2010 applies — err on the side of caution.
- Identify and document reasonable adjustments considered and their outcome.
- Hold a capability meeting before any dismissal decision; right to accompaniment applies.
- Genuine consideration of all alternatives to dismissal.
- Written outcome letter with appeal rights.
- Retain all documentation — medical evidence, correspondence, meeting notes, decision records.
Managing long-term absence well requires process discipline, genuine care for the individual, and a clear understanding of where the legal lines are. It is not easy. But it is manageable — with the right framework and the right support.