We use some essential cookies to make this website work.
We’d like to set additional cookies to understand how you use GOV.UK, remember your settings and improve government services.
We also use cookies set by other sites to help us deliver content from their services.
You have accepted additional cookies. You can change your cookie settings at any time.
You have rejected additional cookies. You can change your cookie settings at any time.
Departments, agencies and public bodies
News stories, speeches, letters and notices
Detailed guidance, regulations and rules
Reports, analysis and official statistics
Consultations and strategy
Data, Freedom of Information releases and corporate reports
Register to vote Register by 18 June to vote in the General Election on 4 July.
What tax codes are, how they're worked out, and what to do if you think your code is wrong.
Your tax code is used by your employer or pension provider to work out how…
Your tax code is made up of numbers and letters. 1257L is the tax code…
If your tax code ends in ‘W1’ or ‘M1’ or ‘X’ you’re on an emergency tax…
HMRC may update your tax code if: you start to get income from an…
In most cases, HMRC will automatically update your tax code when your…
Understand the letters and numbers in your employee's tax codes, know when to update someone's tax code
You put an employee’s tax code into your payroll software to work out how…
The numbers in an employee’s tax code show how much tax-free income they…
Letters in an employee’s tax code refer to their situation and how it…
Usually someone’s tax code changes if their tax-free income (Personal…
HM Revenue and Customs (HMRC) will tell you between January and March…
Use this tool to find out what the numbers and letters in your tax code mean and how much tax you will pay.
The types of tax you will pay as an employee and how this could affect any benefits your claim.
Find out why HMRC may contact you if your tax code changes due to a change in employment.
Use P9X to find out which PAYE tax codes to change, how to change them and which codes to carry forward ready for the new tax year.
Find out what makes a person an enabler of tax avoidance, and what to do about legally privileged communications.
This Tax Information and Impact Note explains the new measure that will increase the amount of debt which can be recovered by coding it out.
Complete a tax check to renew a taxi driver, private hire or scrap metal licence, or apply for the same type of licence with a different licensing authority.
Work out your new employee's tax code and starter declaration to set them up on your payroll software and register them with HMRC.
Don’t include personal or financial information like your National Insurance number or credit card details.
To help us improve GOV.UK, we’d like to know more about your visit today. Please fill in this survey (opens in a new tab).