Guidance
Check what your tax code means
Use this tool to find out what the numbers and letters in your tax code mean and how much tax you will pay.
Use this tax code checker to:
- find out what the letters and numbers in your tax code mean
- see how much Income Tax you’re due to pay
- update your records if something’s wrong
- understand the deductions included in your tax code
To use the tool, you will need your:
- tax code
- annual income, before any deductions
- company benefits details
- State Pension amount
Updates to this page
Published 25 July 2023
Last updated 11 September 2025
show all updates
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A section has been added to advise what information the tool will provide, and new tax code functionality has been added to improve the customer journey.
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Added translation