Fit note guide (UK)

The 'Fit Note' (formal name: Statement of Fitness for Work) replaced the old 'Sick Note' in 2010. It's issued by a GP, nurse, occupational therapist, pharmacist, or physiotherapist. It can say you're 'not fit for work' or 'may be fit for work' with certain adjustments. Since July 2022 the eligible issuer list was expanded. This guide covers when needed, who can issue, and how employers should respond.

Verified against 2 official sources · Last reviewed 14 June 2026
On this page
  1. When needed
  2. Who can issue (since July 2022)
  3. Options on the fit note
  4. Phased return
  5. Duration
  6. Employer duties
  7. What if you disagree with the fit note?
  8. In short

When needed

  • Days 1-7: self-certification sufficient
  • Day 8 onwards: fit note required for continued SSP / OSP

Who can issue (since July 2022)

  • GP (registered)
  • Hospital doctor
  • Registered nurse
  • Occupational therapist
  • Pharmacist
  • Physiotherapist

Expanded 2022 to relieve GP appointment pressure.

Options on the fit note

Option 1 — Not fit for work - Standard for typical sickness - Employee should not work

Option 2 — May be fit for work with adjustments - Details recommended adjustments (phased return, altered duties, workplace changes) - Employee + employer can discuss - If employer agrees: return to work with adjustments - If employer disagrees: treat as 'not fit for work'

Phased return

Common adjustments: - Reduced hours (build up over 2-4 weeks) - Altered duties (avoid heavy lifting, screen time, etc.) - Working from home - Delayed shift start

Duration

Fit notes typically: - 1-2 weeks initially - Up to 3 months maximum per note

If ongoing, request renewal from health professional.

Employer duties

  • Accept fit note
  • Discuss any 'may be fit' adjustments
  • Reasonable adjustments if disability under Equality Act 2010
  • Cannot dismiss for taking sickness leave unfairly

What if you disagree with the fit note?

  • Employee: request second opinion
  • Employer: cannot override; may request Occupational Health referral for independent view

In short

Fit note from day 8 of sickness. Now issued by GP, nurse, OT, pharmacist, physio. 'May be fit' enables phased return.

Frequently asked questions

Do I need a fit note for days 1-7 of sickness?

No — self-certification is sufficient. Fit note required from day 8 of continuous sickness.

Can any GP issue a fit note?

Any GP, hospital doctor, registered nurse, occupational therapist, pharmacist, or physiotherapist since July 2022.

What does 'may be fit for work' mean?

You could return with specific adjustments (phased hours, altered duties, workplace changes). Discuss with employer.

Can my employer reject my fit note?

Cannot reject a 'not fit for work' note. Can decline the adjustments in a 'may be fit' — then treated as 'not fit for work'.

How long does a fit note last?

Typically 1-2 weeks initially, up to 3 months maximum per note. Renew via health professional if needed.

Sources

All figures on this page are sourced from official UK government publications. We don't cite secondary commentary or other calculator sites.

  1. GOV.UK - Statutory Sick Pay (SSP)
  2. GOV.UK - Fit notes

All tax figures on this page use the same configuration that powers our calculators — see our editorial standards for the review process.

Last reviewed: 14 June 2026. Next review due 14 December 2026.

Disclaimer: This page provides general information based on published HMRC and gov.scot figures. It is not personal tax or financial advice. For your specific situation, please consult a qualified accountant or contact HMRC directly.