T Tax Code Explained 2025: What 1257T Means & How It Affects Your Pay
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

