Check My Tax Code
Enter your tax code and we'll explain what it means in plain English — and flag the common reasons a code goes wrong, like emergency codes, BR or 0T on a main job, or a reduced allowance you didn't expect.
How to use it
- Enter your code. Type the tax code from your payslip or coding notice (e.g. 1257L, BR, K475).
- Add a little context. Optionally add your salary and whether it's your only job for a sharper check.
- See what it means. PayGlance decodes it, flags anything that looks off, and shows the tax versus the standard code.
FAQs
What does my tax code mean?
The number is your tax-free allowance with the last digit removed (1257L = £12,570 tax-free). The letters and any prefix change how it's applied — BR taxes everything at 20%, 0T gives no allowance, K codes add to your taxable pay, and an S prefix means Scottish rates.
How do I know if my tax code is wrong?
Common signs: an emergency W1/M1 code that hasn't updated, BR or 0T on your only job (you may be overpaying), a full allowance on a second job (you may underpay), or a reduced allowance with no benefits to explain it. The checker flags each of these.
What should I do if it's wrong?
Check your P2 coding notice in your Personal Tax Account, then contact HMRC to correct your estimated income or remove a benefit that has ended. This tool is guidance, not a substitute for your coding notice.