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 firstname.lastname@example.org.
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 interest and penalties for tax years ended 5 April 2003 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
We have updated the form and guidance so that you can work out interest and penalties for tax years ended 5 April 2003 to 5 April 2021.
Guidance has been updated with 2020 to 2021 changes.
The 'Calculator for working out interest and penalties for tax years ended 5 April 1998 to 5 April 2019 inclusive' has been added.
Due to the recent reductions of the Bank of England base interest rate we are currently updating our interest calculators to reflect the changes (11 March & 19 March). We expect this to be completed by 20 April 2020.