Tell HMRC your tax avoidance scheme reference number

Use form AAG4 to tell HMRC of a scheme reference number given to you for a tax avoidance scheme you have used.


Use the online AAG4 form to tell HMRC your tax avoidance scheme reference number

Use the postal AAG4 form to tell HMRC your tax avoidance scheme reference number

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Use this form if you expect to have an Income Tax, Capital Gains Tax, Corporation Tax, National Insurance contributions or Apprenticeship Levy advantage and have received an 8-digit scheme reference number from any of the following:

  • HMRC
  • a scheme promoter
  • a person involved in the supply of the arrangements
  • the client of a scheme promoter

You can tell HMRC the scheme reference number by either completing the online or postal version of the form.

Email HMRC to ask for this form in Welsh (Cymraeg).

Before you start

The postal form is interactive (one that you complete on screen) and you must use Adobe Reader to complete it.

Contact the Online Services Helpdesk if you have problems opening or saving the form.

Published 2 October 2014
Last updated 14 July 2022 + show all updates
  1. The form has been updated to clarify when it should be completed. It also includes a new address where you should send the completed form to.

  2. First published.