In the medical field, there are various types of documents that serve crucial purposes. Two common documents that people often confuse with each other are medical letters and medical certificates.
When you’re unwell and unable to work, understanding the rules surrounding UK sick notes and fit notes can be essential. Whether you’re an employee, employer, or self-employed worker, knowing your rights and responsibilities regarding sick leave, medical certification, and workplace adjustments can help you navigate time off due to illness more effectively.
In this guide, we’ll cover everything you need to know about UK sick notes and fit notes, including when you need one, how to get one, and what your employer can expect from you.
A sick note, officially known as a fit note (Statement of Fitness for Work), is a document provided by a doctor (GP or hospital doctor) to confirm that an individual is unfit for work due to a health condition. It can also include recommendations on how an employee may return to work with adjustments.
The fit note was introduced in the UK in 2010, replacing the traditional sick note system. The purpose of a fit note is not only to confirm an employee’s illness but also to help employers and employees discuss possible work modifications to support a return to work when appropriate.
You are not required to provide a sick note for the first seven calendar days of illness. During this time, you can simply self-certify your sickness, meaning you inform your employer that you are unwell without the need for medical evidence.
However, if you are off work for more than seven consecutive days (including weekends and non-working days), you will need a fit note from a doctor to confirm your illness and provide details about your condition.
If you have been unwell for more than seven days, you can book an appointment with your GP (General Practitioner) or, if you were treated in a hospital, the hospital doctor. The doctor will assess your condition and decide whether to issue a fit note.
Many GP practices now offer telephone or online consultations. If your condition does not require a physical examination, the doctor may issue a fit note digitally or allow you to collect it from the surgery.
If you are seen by a private doctor, they can provide a sick note, but it may not always be accepted by employers. Employers typically require a fit note from an NHS doctor rather than a private healthcare provider.
If you are admitted to a hospital, the hospital staff can issue a fit note upon discharge if you need time off work.
A fit note includes the following details:
A doctor can either confirm that you are “not fit for work” or that you “may be fit for work” with certain adjustments.
A fit note may suggest that you can return to work with adjustments, such as:
Employers are encouraged to consider these recommendations, but they are not legally required to implement them. If adjustments are not feasible, the employee will remain signed off as unfit for work.
Yes, UK employers are legally required to accept a valid fit note issued by a doctor. However, they do not have to agree to the suggested work adjustments if they believe they are impractical.
Employers cannot force an employee to return to work if they have a valid fit note stating that they are unfit to work.
Self-employed individuals do not qualify for SSP but can apply for:
A fit note may be required to claim these benefits.
If a doctor has stated that you are “not fit for work”, you should not work until the fit note expires or your condition improves.
However, if a doctor has stated that you “may be fit for work” with adjustments, you can discuss with your employer whether returning under modified conditions is possible.
If you remain unwell beyond the period stated on your fit note, you must obtain a new fit note from your doctor. It is your responsibility to provide updated medical evidence to your employer.
In rare cases, an employer may challenge the validity of a fit note. If this happens:
Understanding the rules surrounding UK sick notes and fit notes can help ensure a smooth process for both employees and employers, making it easier to manage sickness absences fairly and efficiently.
