Tax codes explained

What every tax code means, in GOV.UK's words. Check your own with the tax code checker.

CodeWhat it means
1257LYou're entitled to the standard tax-free Personal Allowance.
S1257LYou're entitled to the standard tax-free Personal Allowance.
C1257LYou're entitled to the standard tax-free Personal Allowance.
BRAll your income from this job or pension is taxed at the basic rate (usually used if you've got more than one job or pension).
SBRAll your income from this job or pension is taxed at the basic rate in Scotland (usually used if you've got more than one job or pension).
CBRAll your income from this job or pension is taxed at the basic rate in Wales (usually used if you've got more than one job or pension).
0TYour Personal Allowance has been used up, or you've started a new job and your employer does not have the details they need to give you a tax code.
S0TYour Personal Allowance (Scotland) has been used up, or you've started a new job and your employer does not have the details they need to give you a tax code.
C0TYour Personal Allowance (Wales) has been used up, or you've started a new job and your employer does not have the details they need to give you a tax code.
D0All your income from this job or pension is taxed at the higher rate (usually used if you've got more than one job or pension).
D1All your income from this job or pension is taxed at the additional rate (usually used if you've got more than one job or pension).
CD0All your income from this job or pension is taxed at the higher rate in Wales (usually used if you've got more than one job or pension).
CD1All your income from this job or pension is taxed at the additional rate in Wales (usually used if you've got more than one job or pension).
SD0All your income from this job or pension is taxed at the intermediate rate in Scotland (usually used if you've got more than one job or pension).
SD1All your income from this job or pension is taxed at the higher rate in Scotland (usually used if you've got more than one job or pension).
SD2All your income from this job or pension is taxed at the advanced rate in Scotland (usually used if you've got more than one job or pension).
SD3All your income from this job or pension is taxed at the top rate in Scotland (usually used if you've got more than one job or pension).
NTYou're not paying any tax on this income.
KThe numbers show how much untaxed income or deductions are being collected through this job, with the last digit dropped.
W1, M1 and X (emergency)You're on an emergency tax code: your tax is worked out on what you're paid in that week or month only, as if you were paid that every week or month of the year.

From GOV.UK: what your tax code means.