This file may not be suitable for users of assistive technology.
Request an accessible format.
If you use assistive technology (such as a screen reader) and need a
version of this document in a more accessible format, please email email@example.com.
Please tell us what format you need. It will help us if you say what assistive technology you use.
Use this form to work out income tax, Class 4 National Insurance contributions, interest and penalties for tax years ended 5 April 2011 to 5 April 2021
HMRC are creating new versions of their forms that do not depend on Adobe Reader. Whilst this work is in progress the following methods can be used to ensure the form will download or open in Adobe Reader:
whatever browser you are using, review your settings to make Adobe Reader the default program for opening PDF documents
Windows users should right-click on the form link then select ‘Save target as’ or ‘Save link as’
Mac users should right-click on the form link then select ‘Save linked file as’
save the form — the recommended place is in the documents folder
Guidance and form updated for 2021 to 2022 tax year.
Guidance updated for 2020 to 2021 tax year.
The calculator has been added for working out Income Tax, Class 4 National Insurance contributions, interest and penalties for tax years ended 5 April 2009 to 5 April 2019.
Due to changes in the Bank of England base interest rate, we are currently updating our interest calculators to reflect the changes. Until this is completed you can either calculate interest manually or wait until new calculators are updated.