HM Revenue and Customs: disclosure service

Use this service to make a disclosure if you, your company or client haven't declared all income or gains.


Make your disclosure online

Make your company's disclosure online

Make a disclosure online for your client if you're an agent


Use the online form service if you’re:

  • an individual
  • a nominated partner
  • a trustee of a trust
  • an officer of a company
  • an agent

You, your company or client will also need to:

You can also use the online form service if you do not qualify for a current HMRC campaign, but have not declared the right amount of income or tax for one or more of the following:

  • Income Tax
  • Capital Gains Tax
  • National Insurance contributions
  • Corporation Tax

You’ll need to sign in to, or set up a Government Gateway user ID and password to use the service.

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

Tax, interest and penalty calculators

You can use one of the following calculators to help you work out the tax, interest and penalties you owe if your tax affairs are straightforward, and you’re only entitled to basic personal allowances:

Before you start

If you’re using an older browser (for example, Internet Explorer 8) you’ll need to update it or use a different one to use the calculators. Find out more about browsers.

Published 5 September 2016
Last updated 10 April 2018 + show all updates
  1. The tax, interest and penalty calculators have been updated to include the year 2017.
  2. The agents online service has been added
  3. Temporary instructions added for agents to submit disclosures on behalf of their clients.
  4. First published.