The tax code is a code used is by your employer or pension provider to figure out how much Income Tax they should deduct from your pay or pension (and then send over to the HMRC).
In the 2023/2024 tax year, the most common tax code is 1257L. If this is not your tax code and you believe you’re on the wrong one, you should call HMRC. Otherwise, you’ll pay the wrong amount of tax.
Check out our tax code checker to see what the letters in your tax code mean.
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