What Does Tax Code 1257T Mean in 2026? Full Breakdown for UK Employees
You open your payslip — and there it is: “1257T” instead of the usual “1257L.” No extra notes. Just “T.” Suddenly, tax feels complicated. What does it mean? Should you worry? If your code ends with the letter T, it doesn’t automatically mean a mistake or penalty. Instead, it signals that HM Revenue and Customs

