When anxiety, depression, burnout or severe work-related stress starts affecting your ability to do your job, taking time away from work can be part of recovery. In the UK, the document commonly called a mental health sick note is officially a fit note. It records a healthcare professional’s assessment of how your health affects your fitness for work and can help start a practical conversation about absence, adjustments and returning safely.
The process is broadly the same for mental and physical health conditions. What matters is not simply the diagnosis, but how your symptoms affect your ability to work.
When do you need a fit note for mental health?
If you are off sick for seven calendar days or less, you can usually self-certify your sickness absence. Those seven days include weekends and bank holidays, not just days you would normally work. You should still follow your employer’s sickness-reporting procedure, such as contacting your manager within the required time.
If your absence lasts for more than seven calendar days, your employer can normally ask for a fit note. This is the point at which formal medical evidence is generally needed. If there is a delay getting an appointment, tell your employer what is happening and when you expect to provide the note.
A fit note can be issued after an appropriate assessment by a doctor, registered nurse, occupational therapist, pharmacist or physiotherapist. The professional must be suitably placed and competent to assess how your health is affecting work.
What can a mental health fit note say?
A fit note has two main outcomes: you are either considered not fit for work, or you may be fit for work if suitable support or changes can be agreed. For someone seeking a sick note for anxiety, the discussion might cover concentration, panic symptoms, sleep disruption, medication effects or difficulty managing particular workplace demands.
If the healthcare professional believes you may be able to work with support, the note can include advice such as a phased return, altered hours, amended duties or workplace adaptations. That advice helps you and your employer discuss what is realistic. If suitable changes cannot be agreed, government guidance says you should be treated as not fit for work for the period covered by the note.
Being signed off work with stress
People often talk about being signed off work with stress, but the assessment is based on how your health affects your ability to work. Stress may be linked to workload, conflict, caring responsibilities, bereavement, anxiety, depression or several pressures at once. You do not need to arrive at an appointment with a perfectly worded diagnosis. Explain what has changed, how long it has been happening and what you can no longer manage safely or consistently.
How to prepare for the healthcare appointment
Write down a few concrete examples before the appointment. For instance: “I am sleeping three hours a night, having panic symptoms before meetings and making mistakes in tasks I normally manage.” That gives the clinician a clearer picture than saying only that work feels overwhelming.
Also mention treatment you are receiving, medication side effects if relevant, and whether a temporary change at work might make a return possible. A fit note for mental health may support complete time away or recommend changes that could allow you to stay in or return to work.
What should you tell your employer?
Follow your workplace absence procedure and provide the fit note when required. You do not need to turn a conversation with your manager into a detailed account of your private life. It is often more useful to focus on the practical effect of your health: what you cannot currently manage, how long the fit note covers, what contact you are comfortable with during absence and whether any return-to-work adjustments have been suggested.
Mental health information should be handled sensitively. If you are concerned about privacy, ask who will see the information and how it will be stored or shared. You can also ask whether future conversations should go through your manager, HR or occupational health.
Related reading can include work-related stress, reasonable adjustments for mental health, and returning to work after sickness absence.
Could your mental health condition count as a disability?
Some mental health conditions can meet the definition of disability under the Equality Act 2010 if they have a substantial and long-term negative effect on normal day-to-day activities. This is not automatic for every period of anxiety, stress or low mood, but where the legal definition is met, an employer has a duty to consider reasonable adjustments.
Adjustments depend on the person and the job. They might include a phased return, different start and finish times, quieter working arrangements, modified duties, additional breaks or changes to how work is communicated. A fit note can support that discussion, but it is not the only route to requesting adjustments.
What happens when the fit note ends?
If you feel ready to return before the fit note expires, you do not normally need another appointment solely to be declared fit. Government guidance allows an employee to return earlier if they and their employer agree it is appropriate. If you are still unwell near the end of the period, contact the healthcare professional involved in your care to discuss whether another assessment is needed.
For longer mental health leave in the UK, an employer may also offer occupational health support or a return-to-work meeting. Use that conversation to agree practical details instead of assuming everything must be back to normal on day one. Recovery can be gradual, and a clear plan may make the return more sustainable.
FAQ
Can I get a fit note for anxiety in the UK?
Yes. If anxiety is affecting your fitness for work, an eligible healthcare professional can assess you and may issue a fit note. The decision is based on the impact of your health on work, not simply the label of the condition.
Do I need a fit note for the first seven days off?
Usually no. Employees can normally self-certify for the first seven calendar days of sickness absence. A fit note is generally needed when the absence continues beyond seven days.
What if my employer cannot make the recommended changes?
If a fit note says you may be fit for work but the suggested changes cannot be agreed or accommodated, you should be treated as not fit for work for the period covered by the note.
Can I go back to work before my fit note expires?
Yes. You can return before the end date if you feel able to do so and your employer agrees the return is appropriate. You do not normally need a separate fit note saying you are fully fit.
Conclusion
A mental health fit note is best viewed as a practical work-and-health document, not a judgement on whether your condition is “bad enough”. Self-certification normally covers the first seven calendar days, while longer absences may require a fit note from an eligible healthcare professional. The most useful conversations focus on how your health affects work, what support might help and what a safe return could realistically look like.