Long-Term Sickness Absence: Definition & Management

Long-term sickness absence is any period of absence from work due to illness or injury that extends beyond the duration of standard sick pay entitlements — typically four weeks or more. It is one of the most complex HR challenges because it sits at the intersection of employment law, employee wellbeing, and operational planning.

Managing long-term absence well protects the employee’s dignity and recovery while safeguarding the employer’s legal position. Managing it poorly leads to tribunal claims, lost talent, and a demoralised team picking up the slack.

Key Takeaways

• Long-term sickness absence is typically defined as four or more consecutive weeks of absence due to illness or injury.
• UK employers must follow a fair process before considering dismissal on capability grounds — this includes occupational health referrals and reasonable adjustments.
• Statutory Sick Pay (SSP) lasts 28 weeks; after that, the employer has no further statutory obligation to pay.
• Regular, compassionate contact with the absent employee is essential — both for wellbeing and to maintain a management trail.
• A return-to-work interview should be conducted after every period of sickness absence.

What Counts as Long-Term Sickness Absence?

There is no single legal definition of “long-term” sickness absence in the UK. However, the ACAS Code of Practice and most employer policies treat any absence exceeding four consecutive weeks as long-term.

Common causes include:

• Serious illness — Cancer, heart conditions, autoimmune disorders
• Surgery and recovery — Orthopaedic, cardiac, or other major procedures
• Mental health conditions — Depression, anxiety, burnout, PTSD
• Injury — Accidents, fractures, rehabilitation
• Chronic conditions — Fibromyalgia, ME/CFS, long COVID

The cause matters because it affects the employee’s statutory protections. For example, conditions that qualify as a disability under the Equality Act 2010 — where the condition has a substantial and long-term adverse effect on the ability to carry out normal day-to-day activities — trigger additional obligations on the employer, including the duty to make reasonable adjustments.

Managing Long-Term Sickness Absence: A Step-by-Step Framework

Step 1: Record the Absence Accurately

From day one, record the absence and the expected return date. If the employee cannot provide a return date, record the last known information and set a review date.

Step 2: Maintain Contact

Stay in touch with the absent employee, but be proportionate. ACAS recommends contact at least every two weeks. The purpose is to:

• Show concern for the employee’s wellbeing
• Keep them informed about workplace changes
• Discuss potential return-to-work options
• Gather medical updates

All contact should be documented. Record the date, who made contact, what was discussed, and any actions agreed.

Step 3: Obtain Medical Evidence

Request medical evidence to understand the nature of the illness, the expected duration, and any adjustments that might facilitate a return. Common approaches include:

Medical Evidence	When to Use
GP fit note	Initial evidence for absence up to 28 weeks
Occupational health referral	Complex or prolonged cases requiring specialist assessment
Specialist medical report	When the condition may qualify as a disability under the Equality Act 2010

Step 4: Refer to Occupational Health

For absences extending beyond two weeks, an occupational health (OH) referral is strongly recommended. An OH assessment provides:

• A prognosis and expected return date
• Recommendations for workplace adjustments
• Guidance on whether the condition qualifies as a disability
• Advice on whether alternative roles or modified duties are feasible

Organisations such as FOM (Facility of Occupational Medicine) and BOHS (British Occupational Hygiene Society) maintain directories of accredited OH providers.

Step 5: Consider Reasonable Adjustments

If the employee’s condition is a disability under the Equality Act 2010, you have a legal duty to make reasonable adjustments. These might include:

• Phased return to work (reduced hours for a defined period)
• Modified duties or a temporary role change
• Adjusted working hours or flexible working arrangements
• Equipment or workspace modifications
• Additional break periods

Failure to consider reasonable adjustments before dismissing a disabled employee is one of the most common grounds for successful tribunal claims.

Step 6: Assess Capability

If the employee cannot return to their role within a reasonable timeframe, you may need to commence a capability procedure. This must be a last resort — only after you have:

• Explored all return-to-work options
• Obtained and considered medical evidence
• Made or considered reasonable adjustments
• Consulted with the employee at each stage

ACAS expects a minimum of three formal capability meetings before dismissal is considered.

Step 7: Return to Work

When the employee returns, conduct a return-to-work interview. This should be a supportive, structured conversation covering:

• Confirmation of fitness to return
• Any ongoing adjustments needed
• Phased return arrangements if applicable
• Confirmation that the absence record is updated

Statutory Sick Pay and Long-Term Absence

In the UK, Statutory Sick Pay (SSP) is paid for up to 28 weeks at a flat weekly rate (currently £116.75 per week in 2026/27). After 28 weeks, SSP ends. At that point, the employee may be entitled to:

• Employment and Support Allowance (ESA) — A government benefit for those with limited capability for work.
• Personal Independence Payment (PIP) — For those with long-term health conditions or disabilities.
• Company sick pay — If your policy provides enhanced pay beyond the statutory minimum.

Some employers offer enhanced sick pay schemes that continue beyond 28 weeks. These are a valuable retention tool, particularly for senior employees or those with rare skills.

The Financial Impact of Long-Term Absence

Long-term sickness absence affects more than just the absent employee’s team. The costs include:

Cost Category	Typical Impact
SSP payments	Up to 28 weeks at £116.75/week per employee
Temporary cover	Agency or overtime costs to cover the role
Lost productivity	Reduced output from the team and the absent employee
Management time	HR and line manager hours spent on the case
Potential tribunal costs	If dismissal is challenged and goes to tribunal

According to the CIPD Health and Wellbeing at Work survey (2024), the average cost of sickness absence to a medium-sized UK employer is approximately £500 per employee per year — with long-term cases driving a disproportionate share of that cost.

Frequently Asked Questions

How long does sick pay last in the UK?

Statutory Sick Pay lasts 28 weeks. It is paid at a flat weekly rate (currently £116.75 per week in 2026/27). After 28 weeks, SSP stops and the employee may need to claim ESA or other government benefits. Some employers offer enhanced sick pay that lasts longer.

Can I dismiss an employee on long-term sick leave?

You can, but only as a last resort after following a fair capability procedure. This includes obtaining medical evidence, considering reasonable adjustments, consulting with the employee, and following ACAS guidelines. Dismissing a disabled employee without exploring adjustments is a high tribunal risk.

What is an occupational health referral?

An occupational health referral is a request for a specialist medical professional to assess an employee’s fitness for work, prognosis, and any adjustments needed to facilitate their return. It provides the employer with actionable medical advice while protecting the employee’s medical confidentiality.

Do I have to hold an employee’s job while they are on long-term sick?

There is no absolute legal obligation to hold a specific role open indefinitely. However, the Equality Act 2010 requires you to make reasonable adjustments for disabled employees, and ACAS expects employers to explore all options before considering dismissal. Holding the role for a reasonable period — typically 6–12 months — is standard practice.

What is a phased return to work?

A phased return to work is a gradual transition back to full duties after a period of long-term absence. It typically involves reduced hours, lighter duties, or both, increasing over a defined period (e.g., 4 to 8 weeks). It is one of the most common and effective reasonable adjustments recommended by occupational health.