Long-Term Sick Leave UK (2026): SSP, Rights & Dismissal

Last updated: April 2026

Taking time off due to a long-term illness or extended absence from work in the UK can feel overwhelming. Between managing your health, appointments, and finances, understanding your rights is essential.

Long-term sickness can affect your income and job security, but UK law gives you important protections many people don’t realise.

This guide explains long-term sick leave rights in the UK, including sick pay, benefits, and what happens if your absence continues.

Quick Summary

• Long-term sick leave usually means 4+ weeks off work
• SSP (2026) is paid from day one with no earnings threshold
• You continue to build annual leave while off sick
• Employers must follow a fair process before dismissal
• Disability laws may provide additional protection

What Is Considered Long-Term Sick Leave in the UK?

There is no strict legal definition of long-term sick leave in UK law.

However, in practice, it is commonly understood as:

• An absence lasting 4 weeks or more, or
• Repeated periods of sickness over time

Statutory Sick Pay (SSP) in the UK (2026)

Statutory Sick Pay is the minimum legal sick pay that eligible employees must receive from their employer during a period of incapacity for work. Following the Employment Rights Act 2025, SSP underwent its most significant reform since the 1980s.

Key SSP Rules (2026)

• Waiting days abolished: SSP is now payable from the first qualifying day of sickness. Previously, the first three days were unpaid, meaning short illnesses often fell entirely outside SSP coverage.
• Lower Earnings Limit removed: All employees qualify for SSP regardless of how much they earn. Previously, workers had to earn at least £125/week (2025/26 threshold) to be eligible. The government estimates up to 1.3 million additional workers are now covered, particularly part-time, agency, and variable-hours staff.
• New rate calculation: SSP is now paid at £123.25 per week (the flat rate from 6 April 2026) or 80% of average weekly earnings, whichever is lower. Average weekly earnings are based on the 8-week period before absence began.

Many employers offer enhanced sick pay schemes, check your contract.

Explore our full guide on SSP changes 2026 UK.

Do You Build Up Annual Leave While on Sick Leave?

Under UK law, your statutory annual leave entitlement, a minimum of 5.6 weeks per year for most workers, continues to accrue throughout any period of sick leave, regardless of how long the absence lasts. Employers cannot deduct or reduce holiday entitlement for time taken off due to illness..

• You can carry over unused leave if you are unable to take it due to illness
• Sick days cannot be counted as annual leave if medically certified
• If you fall ill during pre-booked holiday, you may reclassify those days as sick leave, but you should notify your employer and provide appropriate evidence
• You can request to take your unused paid holiday during a period of sick leave if you choose to do so

What Happens When Illness Lasts Longer?

Once SSP or company sick pay ends, two main areas become important:

Employer Sick Pay & Workplace Process

Employers may have internal procedures for managing long-term sickness, such as:

• Ongoing medical evidence (fit notes)
• Regular contact with HR
• Occupational health assessments
• Return-to-work planning

Employers must:

• Act reasonably
• Follow a fair procedure
• Consider medical evidence
• Communicate with the employee

Benefits & State Support in the UK

If you cannot work due to illness, you may be able to claim:

• Universal Credit

Learn more about fit note and Universal Credit UK.

• Employment and Support Allowance (ESA)

These benefits depend on your circumstances and eligibility.

Can You Be Dismissed While on Long-Term Sick Leave?

Yes, dismissal during long-term sick leave is legally possible in the UK. However, it is only lawful if handled fairly. Ill health capability falls under the Employment Rights Act 1996 as a potentially fair reason for dismissal, but the procedural requirements are strict.

Employers must:

• Obtain medical evidence
• Consult with you
• Consider your ability to return
• Follow a fair process

There is no fixed length of absence that automatically justifies dismissal.

Employers can dismiss for long-term sickness, but only after a fair process. This includes:

• Warning you that dismissal is being considered
• Reviewing medical evidence
• Considering your chances of returning to work
• Exploring adjustments or alternative roles

Dismissal is more likely if your absence is prolonged and significantly impacts the business.

Tribunals assess factors such as business impact, likelihood of recovery, length of service, and employer size.

If your condition qualifies as a disability under the Equality Act 2010, additional protections apply.

Alternatives Employers Must Consider Before Dismissal

Before dismissing, employers should consider:

• Phased return to work
• Adjusted duties
• Flexible working arrangements
• Workplace adjustments
• Alternative roles within the organisation

Failure to consider these may make dismissal unfair or discriminatory.

Legal Rights & Protections in the UK

Unfair Dismissal

• Usually requires 2 years’ service to claim
• Employers must still follow a fair process

Disability Protection Under the Equality Act 2010

Long-term sick leave frequently overlaps with disability protection under the Equality Act 2010. This is critically important because disability discrimination claims do not require any minimum service period and compensation is uncapped.

When Does a Condition Qualify as a Disability?

A person is disabled under the Equality Act 2010 if they have a physical or mental impairment that:

• Has a substantial adverse effect on their ability to carry out normal day-to-day activities, and
• Is long-term, meaning it has lasted, or is likely to last, for at least 12 months, or for the rest of the person’s life.

Mental health conditions (including anxiety, depression, and stress-related illness) can qualify as disabilities if they meet this definition. The following conditions are automatically treated as disabilities under the Act, without any duration requirement:

• Cancer
• HIV infection
• Multiple sclerosis (MS)

Progressive or recurring conditions can also qualify even if their effects are not always substantial, for example, if episodes are unpredictable or severe when they do occur.

Employer Duties Where Disability Is Involved

If an employee’s condition qualifies as a disability, the employer has additional legal obligations:

• Duty to make reasonable adjustments: The employer must take steps to remove or reduce any disadvantage caused by the employee’s disability. Failure to do so is itself a form of discrimination.
• Disability-related absence: Employers should consider discounting disability-related absences when applying absence management triggers or thresholds. Applying standard sickness triggers to disability-related absences without adjustment can constitute disability discrimination.
• Dismissal risk: Dismissing a disabled employee without exhausting all reasonable adjustments significantly increases the risk of an uncapped disability discrimination claim. Even where dismissal is ultimately justified, the process must be impeccable.

Examples of Reasonable Adjustments

Whether an adjustment is “reasonable” depends on factors including its cost, practicality, and effectiveness relative to the employer’s resources. There is no exhaustive list. ACAS guidance recommends that employers consult with the employee and, where appropriate, with occupational health to identify the most effective options.

What Can Your Employer Ask For?

Employers can request:

• Fit notes from a GP or NHS
• Occupational health reports
• Return-to-work assessments

They must:

• Handle your medical data confidentially
• Only request information that is necessary
• Obtain your consent before requesting a medical report from your own GP or specialist under the Access to Medical Reports Act 1988.

Practical Steps to Protect Yourself

• Review your employment contract
• Keep your employer informed (preferably in writing)
• Keep medical evidence (fit notes)
• Check your entitlement to SSP or benefits
• Request reasonable adjustments if needed
• Seek advice if issues arise

Need Advice About Your Situation?

If you’re unsure about your rights or how your employer is handling your sickness, you can contact the ACAS helpline.

They provide free, confidential advice on employment rights, including long-term sick leave and dismissal.

Understanding your rights can help you protect your income, your job, and your long-term position if your situation becomes complex.

If you’re dealing with workplace anxiety about taking sick leave, you may also find this helpful: What is sick note paranoia and how to overcome it?