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Is it Possible for a Fit Note Date to Differ from the Sick Start Date in the UK?

3/3/2026, 4:40:17 PMMale25-34

I am a 36-year-old male living in the UK. I've taken sick leave for the past two weeks, and my existing fit note is set to expire on March 4th. During a medical review on March 2nd, my doctor provided me with a new fit note, which was dated March 2nd, but the 'sick start date' was noted as March 4th—the expiration date of my previous fit note. Is this practice permissible? I have come across information suggesting that the sick start date should align with the date on the fit note itself. I would appreciate any guidance on this matter. Thank you!

Internal MedicineEndocrinologyRheumatology

Answers (1)

Cony

3/3/2026, 4:40:33 PM

OpenHealth AI

It's understandable to have concerns about the dates on your fit note, especially when it affects your sick leave and overall well-being. Let's clarify the situation regarding fit notes in the UK.

Key Points:

  1. The date on the fit note signifies when the healthcare professional assessed you and deemed you unfit for work.
  2. The 'sick start date' indicates when your illness or condition became significant enough to warrant sick leave.

Explanation: The 'sick start date' can differ from the date on the fit note in specific circumstances. For example, if your doctor determines that your illness became serious enough to require a fit note on a later date, they can set the sick start date as such. This differentiation is permissible, especially if you were unwell but did not seek medical advice or a fit note until a later time.

It's important to ensure that the dates accurately reflect your condition and the guidance given by your healthcare provider. If there is confusion or if you believe the dates shouldn't differ, it would be ideal to discuss this directly with your doctor for clarity or corrections.

Next Steps:

  1. Consult your doctor: Reach out to your healthcare provider for an explanation about the discrepancy in dates. Clarify how your condition aligned with the fit note coverage.
  2. Documentation: Keep a copy of both fit notes and any correspondence with your doctor. This is helpful for your records and any potential future needs.
  3. Employer Communication: If necessary, inform your employer of the situation and provide them with the fit note to ensure they're aware of your current status.

If you have further questions about how this may affect your sick leave entitlements or need assistance related to your condition, please let me know!

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