Calculate interest and penalties for tax years ending 5 April 2004 to 5 April 2023
Use this form to work out interest and penalties for tax years ending 5 April 2004 to 5 April 2023.
Before you start
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How to complete the form
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Download and save the form on your computer.
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Open it using the latest free version of Adobe Reader.
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Complete it on-screen.
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Email HMRC to ask for the form in Welsh (Cymraeg).
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Updates to this page
Last updated 26 January 2024 + show all updates
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The interest and penalty calculator has been updated to include the tax years ending 5 April 2003 to 5 April 2022.
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Title and form corrected to say 'for tax years ended 5 April 2002 to 5 April 2021'.
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The interest and penalty calculator for the tax years ending 5 April 2003 to 5 April 2021 has been updated.
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First published.