How to manage the move from short to long-term sickness absence

Are you managing an employee whose short-term sick leave is tipping into long-term absence? The short answer is you should follow a clear, compassionate process that aligns with UK law, keeps communication open, and explores adjustments before any capability steps. In the UK, long-term sickness is usually four weeks or more, and there are distinct legal duties at this stage. This guide explains the steps, timelines, reasonable adjustments, medical advice, capability, and data protection, with links to official guidance and practical templates.

What counts as short-term versus long-term sickness absence in the UK?

Long-term sickness absence is usually any continuous absence lasting four weeks or more. You still manage every case individually, but the trigger point is a useful guide for process.

The advice from the Advisory, Conciliation and Arbitration Service (Acas) states that long-term sickness is normally four weeks or more. In practice, your sickness policy should explain how you treat short spells, cumulative patterns, and continuous long-term leave. The Health and Safety Executive notes that 1.8 million workers experienced work-related ill health in 2023/24, which shows why prevention and good management matter. Use clear triggers, keep notes from day one, and stay consistent with your policy.

When and how should you request medical or occupational health advice?

Request occupational health input once absence moves towards the long-term stage or if work adjustments may enable a return. Always get explicit consent and share clear referral questions.

The fit note is your starting point. The latest guidance for employers and line managers explains the “may be fit for work” option and how to act on it, as set out on GOV.UK. If the role is safety critical, or adjustments are complex, escalate to occupational health. Ask focused questions such as timelines, functional restrictions, prognosis, and recommended adjustments. Explain to the employee how you will use their information and handle it under UK GDPR.

What reasonable adjustments should you consider under the Equality Act 2010?

Reasonable adjustments remove or reduce barriers so the person can work. You should consider practical, timely steps that fit your organisation’s size and resources.

Examples that often help:

• Phased return to work, with reduced hours that scale up over four to eight weeks.

• Adjusted duties, such as fewer manual tasks, or moving away from lone working.

• Flexible start and finish times to manage fatigue or medication.

• Equipment or software, for example, ergonomic chairs or dictation tools.

• Training refreshers and a buddy system to rebuild confidence after absence.

The duty to make reasonable adjustments applies when an employee has a disability under the Equality Act 2010. Consider external support through Access to Work, which can fund adjustments and travel support. Document your assessment, decisions, and review points.

What timeline should you follow for long-term sickness management?

Use a clear timeline that sets expectations, reduces stress, and keeps you compliant. Adjust to the medical facts, but do not let cases drift.

Suggested timeline:

Weeks 1 to 4 (Days 1 to 28):

• Maintain regular and supportive contact with the employee.
• Confirm sick pay arrangements and obtain fit notes as required.
• Discuss any immediate support measures and consider reasonable adjustments where appropriate.
• An informal wellbeing meeting may be held during this period, particularly where the employee is experiencing stress, mental health concerns, neurodiverse conditions, or other circumstances where early intervention and support may assist recovery and return to work.

At 4 Weeks (28 Days): of Continuous Absence:

• The absence will normally be treated as long-term sickness absence.
• The organisation may arrange a First Formal Absence Review Meeting. This is the earliest point at which a formal review would normally be considered.
• The meeting will discuss the employee’s medical condition, likely prognosis, medical evidence received, support measures, reasonable adjustments, and whether an Occupational Health referral is required.

Weeks 4 to 8 (Days 29 to 56):

• Continue regular and proportionate contact with the employee.
• Obtain Occupational Health advice where appropriate.
• Consider temporary adjustments, phased return options and any recommendations which may support a return to work.

8 Weeks (56 Days):

• The organisation may arrange a Second Formal Absence Review Meeting.
• The meeting will review the employee’s ongoing fitness for work, Occupational Health advice, likely timescales for recovery, reasonable adjustments and any suitable alternative duties or redeployment opportunities.

Weeks 8 – 12 (Days 56 to 84):

• Continue monitoring the employee’s circumstances.
• Maintain appropriate contact and review whether any further support measures or workplace adjustments may facilitate a return to work.

12 Weeks (84 Days):

• The organisation may arrange a Third Formal Absence Review Meeting.
• The meeting will review all available medical evidence, Occupational Health reports, reasonable adjustments considered, the impact of the continued absence on the organisation, and any suitable alternative employment opportunities.
• The employee will be given the opportunity to provide any further information, medical evidence or representations regarding their circumstances and ability to return to work.
• Where a return to work is not foreseeable within a reasonable timeframe, and after consideration of all relevant medical evidence, reasonable adjustments and alternative employment options, the organisation may decide that continued employment is no longer sustainable.
• The outcome of the meeting may include a further review period, implementation of additional support measures, redeployment, or dismissal on the grounds of capability due to ill health.
• Any decision regarding the employee’s continued employment will be based on the individual circumstances of the case and communicated in writing, together with details of the employee’s right of appeal.

Please note that the timescales set out above are intended as a guide only and represent the earliest points at which review meetings would normally be considered. The Organisation reserves the right to vary these timescales where appropriate, taking into account the individual circumstances of the case, the availability of medical evidence, Occupational Health advice, treatment plans, reasonable adjustments under consideration and the likelihood of a return to work within a reasonable timeframe.

How do you run a fair capability process for long-term sickness absence?

You must consult, gather medical evidence, consider adjustments, and explore alternatives before any dismissal. Keep the door open to return-to-work at every stage.

A fair capability (formal review of attendance) sequence:

1. Invite to a formal capability meeting with reasonable notice, the right to be accompanied, and a clear agenda.
2. Share the evidence, including occupational health advice, fit notes, and your adjustments log.
3. Explore options such as a longer phased return, amended duties, or redeployment. Document why each is or is not viable.
4. Decide on an outcome. This could be further review, a final review, redeployment, or dismissal with notice due to capability.
5. Confirm the decision in writing and offer the right of appeal.

Courts look for fairness under the Employment Rights Act 1996, section 98. Following Acas guidance on long-term sickness helps show you acted reasonably and proportionately.

How do Statutory Sick Pay and company sick pay work during long absences?

SSP usually runs for up to 28 weeks if eligibility rules are met, and you may also offer contractual sick pay. Communicate entitlements clearly and review them at key milestones.

Explain SSP and any company scheme early. Share the end date of SSP so the employee can plan. Point them to GOV.UK guidance on Statutory Sick Pay. If your policy includes enhanced pay, state any conditions, such as engagement with occupational health or attendance at reviews. Apply policies consistently to avoid grievances or discrimination claims. Keep payroll aligned with fit notes and any agreed phased return.

What records can you keep and how does UK GDPR apply to health data?

Keep only what you need, for as long as you need it, and protect it. Health data is special category data and attracts higher safeguards.

The Information Commissioner’s Office explains how to handle sickness records under the UK GDPR and the Data Protection Act 2018. Limit access to HR and relevant managers. Use a lawful basis and an Article 9 condition for special category data, for example, employment and social protection law obligations. Share data with occupational health on a need-to-know basis and record consent where appropriate. Set retention periods that match your policy. Securely delete drafts, emails, and duplicates.

Next steps:

• Map what you collect, where it is stored, and who can access it.

• Update your privacy notice to cover health data and occupational health referrals.

• Train managers on confidentiality and note taking.

How should you plan a safe and sustainable return to work?

Co-create a written return-to-work plan that includes adjustments, timescales, and review points. Review progress weekly in the early stages and then taper.

A strong plan usually covers working hours, duties, productivity expectations, and check-ins. Use the “may be fit for work” notes from the fit note and any occupational health advice. If a phased return is not working, step back and reassess. You may need a longer ramp, different duties, or a temporary redeployment. Keep the plan under review for at least one month, then extend as needed.

What mistakes cause most long-term sickness disputes?

Most disputes stem from poor communication, inconsistent policies, or skipping steps. Avoid these common pitfalls.

• Letting cases drift without scheduled reviews, which looks unfair later.

• Ignoring occupational health advice without good reasons on record.

• Treating everyone the same where disability or pregnancy factors apply.

• Mishandling data or sharing health details too widely.

• Rushing to dismissal without exploring adjustments or redeployment.

• Setting unrealistic return-to-work targets without medical input.

For pregnancy-related sickness, adjust your triggers. Absence connected to pregnancy must not be used for disciplinary action or redundancy selection.

Can you share a real example of long-term sickness managed well?

Yes. Here is a brief anonymised case from our work with a values-led SME. It shows why early structure helps.

A social enterprise had two long-term absences following surgery. We introduced a standard four-week review, occupational health referrals, and a simple adjustments tracker. One employee returned on a six-week phased plan. The other moved into a lighter internal role after three months of absence. Long-term absence reduced by 38% within nine months, and employee engagement scores rose. This outcome came from consistent reviews, documented decisions, and a fair capability process held only when needed.

Where can you get expert, values-led help on sickness cases?

If you do not have capacity in-house, bring in expert HR support. We help you apply the law with empathy.

At Specialised HR, we support ethical and sustainable employers with practical, people-first advice. Explore our HR Services for policies, manager coaching, and case handling. Not sure if your policy is fit for purpose? Request a Free HR Docs Review and we will highlight gaps and risks. If you need immediate help on a live case, contact us.

Related Resources

• HR Services

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Further Reading

• GOV.UK: Statutory Sick Pay (SSP)

Eligibility, evidence and duration details for SSP, including employer responsibilities.

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