UK Tax Code Decoder & Lookup

UK tax codes look confusing, but each one has a clear meaning. Enter your tax code, like 1257L or BR, to see exactly what it means for your pay.

This tool explains common codes such as K codes, 0T, D0, D1, NT, and Scottish S-prefix codes. It also shows how much tax-free personal allowance each code gives you.

Check your tax code here if it has changed on a recent payslip.