What your tax code means

Your tax code is made up of numbers and letters.

1257L is the tax code currently used for most people who have one job or pension.

HMRC will usually contact you to explain how they worked out your individual tax code if your tax code changes.

Check what your tax code means

You can use the tax code checker to find out:

  • what the numbers and letters in your tax code mean
  • how much tax you will pay
  • what you may need to do next

Depending on your circumstances, you may be asked about:

What the numbers mean

The numbers in your tax code tell your employer or pension provider how much tax-free income you get in that tax year.

HMRC works out your individual number based on your tax-free Personal Allowance and income you have not paid tax on (such as untaxed interest or part-time earnings). They also consider the value of any company benefits (such as a company car).

Example

You’re entitled to the standard tax-free Personal Allowance of £12,570, but you also get medical insurance from your employer. As this is a company benefit it lowers your Personal Allowance and changes your tax code.

The medical insurance benefit of £1,570 is taken away from your personal allowance, leaving you with a tax-free Personal Allowance of £11,000. This would mean your tax code is 1100L.

What the letters mean

Letters in your tax code refer to your situation and how it affects your Personal Allowance.

Letters What they mean
L You’re entitled to the standard tax-free Personal Allowance
M Marriage Allowance: you’ve received a transfer of 10% of your partner’s Personal Allowance
N Marriage Allowance: you’ve transferred 10% of your Personal Allowance to your partner
T Your tax code includes other calculations to work out your Personal Allowance
0T Your 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
BR All 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)
D0 All 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)
D1 All 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)
NT You’re not paying any tax on this income
S Your income or pension is taxed using the rates in Scotland
S0T Your 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
SBR All 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)
SD0 All 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)
SD1 All 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)
SD2 All 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)
SD3 All 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)
C Your income or pension is taxed using the rates in Wales
C0T Your 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 
CBR All 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) 
CD0 All 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) 
CD1 All 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)

If your tax code has ‘W1’ or ‘M1’ or ‘X’ at the end

These are emergency tax codes.

If your tax code has a ‘K’ at the beginning

Tax codes with ‘K’ at the beginning mean you have income that is not being taxed another way and it’s worth more than your tax-free allowance.

For most people, this happens when you’re:

  • paying tax you owe from a previous year through your wages or pension
  • getting benefits you need to pay tax on - these can be state benefits or company benefits

Your employer or pension provider takes the tax due on the income that has not been taxed from your wages or pension - even if another organisation is paying the untaxed income to you.

Employers and pension providers cannot take more than half your pre-tax wages or pension when using a K tax code.