When Do You Need A Doctor’s Note For Work Uk?
In the UK, the rules around doctor’s notes for work absence are more straightforward than many employees realise — but they are also frequently misunderstood by both employers and employees. Whether you need a note depends primarily on how long you have been off, not on why you were absent. This guide covers exactly when a doctor’s note is legally required, what form it takes, who can issue it, and what happens when your employer asks for more documentation than the law requires.
The 7-Day Rule: When a Doctor’s Note Is Required
First 7 days off sick
You can self-certify your absence. Your employer may ask you to complete a self-certification form (SC2 or the employer’s own form) when you return, but they cannot legally require a doctor’s note for absences of 7 days or fewer. The 7 days are calendar days, not working days — so a weekend counts.
After 7 days
If your absence continues beyond 7 consecutive calendar days, your employer can ask for a fit note (also called a Med 3 or statement of fitness for work) from a clinician. Fit notes issued as part of NHS care are free. Private fit notes have a fee that you pay yourself (your employer cannot require you to pay for documentation they request).
Fit Note vs. Sick Note: What’s the Difference?
The term “sick note” is commonly used but technically out of date. Since 2010, the official document is the fit note (Statement of Fitness for Work, form Med 3). The key difference is the focus: a fit note assesses what you can do, not just what you cannot.
| Feature | Old sick note (pre-2010) | Current fit note (Med 3) |
|---|---|---|
| Focus | Confirms you are unfit for work | Can say “not fit for work” OR “may be fit for work” with adjustments |
| Adjustments | Not included | May suggest phased return, amended duties, altered hours, or workplace adaptations |
| Who can issue | GP only | GP, hospital doctor, nurse, occupational therapist, pharmacist, or physiotherapist |
| NHS cost | Free | Free if issued as part of NHS care |
| Covers | Any absence | Absences over 7 calendar days (for first note) |
When Your Employer Can Request a Note Earlier
While the legal default is 7 days before a fit note is required, some employers have contractual policies that require documentation sooner — for example, after 3 days, or even for any single day’s absence. If your employment contract or staff handbook specifies an earlier trigger, your employer can legitimately request a note at that point.
However, your employer must pay for any medical certificates they require beyond what the law mandates. If they request a private certificate for an absence of 3 days, they should reimburse the cost. In practice, enforcement of this is inconsistent, but the principle is established in employment law guidance from ACAS.
Need a Sick Note or Fit Note Quickly?
GMC-registered UK doctors can issue a fit note online after a clinical assessment — same-day or next-day in most cases.
Statutory Sick Pay (SSP) and Doctor’s Notes
Statutory Sick Pay is the minimum level of sick pay that eligible employees must receive from their employer. The current SSP rate is £116.75 per week (2024/25), paid from the 4th day of absence. A fit note is not required to trigger SSP entitlement for the first 7 days — self-certification is sufficient. After 7 days, a fit note supports continued SSP payments.
| Absence duration | SSP status | Documentation needed |
|---|---|---|
| Days 1–3 | Waiting days — SSP not paid | None required (self-certification) |
| Days 4–7 | SSP begins (if eligible) | Self-certification only |
| Day 8 onwards | SSP continues (if eligible) | Fit note required |
| After 28 weeks SSP | SSP ends — may transition to ESA | Fit note required for ESA claim |
Employees who are not eligible for SSP (for example, those earning below the Lower Earnings Limit of £123/week, or self-employed workers) may be able to claim Employment and Support Allowance (ESA) from the Department for Work and Pensions. A fit note is required to support an ESA claim.
Can Your Employer Dismiss You for Being Off Sick?
Dismissal for sickness absence is possible but legally complex. An employer cannot simply dismiss you for being off sick — they must follow a fair process, which typically involves formal absence reviews, consideration of reasonable adjustments, occupational health referrals, and documented warnings. Dismissal for sickness absence without following a proper process may constitute unfair dismissal.
If your condition amounts to a disability under the Equality Act 2010 (a physical or mental impairment with a substantial, long-term effect on normal day-to-day activities), your employer has a duty to make reasonable adjustments before considering dismissal. A fit note that indicates “may be fit for work” with suggested adjustments strengthens your position considerably.
Frequently Asked Questions
Do I need a doctor’s note for 1, 2, or 3 days off work?
Can I get a private sick note for work if I can’t see my GP?
What if my employer refuses to accept my fit note?
Can my employer ask for a backdated sick note?
Does a fit note mean I cannot work at all?
Is a fit note required for mental health absence?
Need a Sick Note or Fit Note Online?
Get a fit note from a GMC-registered UK doctor after a clinical assessment. Valid for employer submission, SSP, and DWP purposes.
Related: Fit note guide · Statutory sick pay (SSP) · Private sick note