1257L tax code refers to what, exactly?

You are entitled to get £12,570 as standard allowance each year, before your income is taxed, according to the1257l tax code meaning Many people use the standard deduction when they have only one job and no other taxable income or deductions. Having the letter "L" on your form means you are eligible for the basic tax-free amount. This code tells employers from HMRC the amount of tax that needs to be taken through PAYE. Full tax is taken off your earnings each time you get paid if your financial situation remains the same.