Instantly explains what your tax code means: standard, K codes, emergency codes, Scottish S prefix, Welsh C prefix and more.
Shows the estimated annual Income Tax based on your code and income so you can verify you're paying the right amount.
Flags codes like 0T, W1 and K codes that may mean you're overpaying or have an issue HMRC needs to resolve.
UK Tax Hero connects you with qualified tax specialists for filing, HMRC investigations, tax planning and more.
1257L is the most common tax code. 1257 means a personal allowance of £12,570 (1,257 × 10). L means you’re entitled to the standard tax-free personal allowance.
W1/M1 (or X) codes mean tax is calculated on a non-cumulative basis. This often results in paying too much or too little tax. Contact HMRC to correct it, especially after a job change or if you haven’t worked for part of the year.
One of our matched tax specialists will contact you within 1 business day.
