You can usually self‑certify sickness for up to 7 calendar days in the UK, after which your employer can ask for a “fit note” (sick note) from a doctor or other eligible healthcare professional.

Core rule: how long you can self certify

  • In most UK workplaces, you can self certify if you are off sick for 7 days or less , counting all days in a row you are ill (including weekends and bank holidays).
  • From day 8 of sickness onwards , your employer can require medical evidence, typically a fit note from a GP or other authorised professional.
  • This “up to 7 days” limit is a UK norm; in other countries or specific workplaces, self‑certification windows can range from 1–7 days or even longer in some systems.

What “7 days” actually means

  • The 7 days are counted consecutively from the first day you’re too unwell to work , not just work days.
  • Example: Sick from Friday to the following Thursday = 7 calendar days, all of which can normally be covered by self‑certification.
  • If you are still unwell on day 8 , you would usually be expected to obtain a fit note to remain on sick leave and to support Statutory Sick Pay (SSP) beyond self‑certification.

Any recent or temporary changes?

  • During parts of the COVID‑19 pandemic, the government temporarily extended self‑certification to 28 days to ease pressure on GP services, but this was a time‑limited measure that no longer applies.
  • Current guidance has reverted to the standard position: self certify up to 7 days, fit note after that , unless a specific new emergency rule is introduced in future.

How many times can you self certify?

  • There is no official legal limit on how many separate periods of self‑certified absence you can have in a year.
  • However, many employers set internal triggers (for example, if you self certify several times in a short period) that can lead to review meetings or a requirement for more evidence for future absences.
  • Repeated short self‑certified absences can prompt HR or managers to request occupational health input or additional documentation to prevent misuse.

Practical tips if you’re off sick

  • Always follow your employer’s sickness reporting procedure (who to contact, by when, and how: phone, email, portal, etc.).
  • Complete any required self‑certification form when you return, giving dates of sickness and a brief description of your illness (you usually don’t need detailed medical info).
  • If you expect to be off beyond 7 days, try to book a GP/healthcare appointment early so you are not left without a fit note when self‑certification ends.

Information gathered from public forums or data available on the internet and portrayed here.