Guidance

What to do if your tax agent business is changing

What you need to tell HMRC if you're a tax agent and your business is changing in some way.

From:
HM Revenue & Customs
Published
17 October 2022
Last updated
19 September 2023 — See all updates

If your business is changing legal entity

Your tax agent firm is a legal entity if it has any legal rights and responsibilities, including tax filings. If your business is changing legal entity for any reason, such as changing from a sole trader to a limited company, there are some things you must do.

If you’re using an agent services account

You’ll need to:

You must not try to move agents codes from your old legal entity to your new agent services account. This breaches the HMRC standard for agents and UK General Data Protection Regulation (UK GDPR).

If you’re using HMRC online services for agents

For Self Assessment and Corporation Tax you’ll need to:

  • write to the Agent Compliance Team to request new agent codes
  • ask the Agent Compliance Team to remove any agent codes for legal entities that are no longer trading or supervised for anti-money laundering

For other duties, request new agent codes.

HMRC may ask for more information when you change your agent contact details. This is to make sure the new legal entity still meets the registration requirements, like supervision for anti-money laundering.

If your agency firm is merging with another one

If your agency firm is merging with one or more other agency firms, you must let HMRC know about the new business set up.

If a new legal entity has been created, you must:

  • register it as a business
  • follow the steps for what to do if your business is changing legal entity
  • apply for new agent codes if you’re using HMRC online services for agents

If one agency firm has merged into an existing firm which does not change legal entity, you do not need to do anything with the clients of the existing firm.

For the clients of the merged firm, you must:

If you want to move clients between client lists

When you need to get new authorisation from your client, you do not need to remove your current authorisation first. This will automatically remove the old one.

If you want to move clients between client lists, you must:

HMRC will not move clients between client lists for you.

If your agency is de-merging from another one

If your agency firm is separating into 2 firms, you’ll need to:

Any firm that’s not changing legal entity does not need to:

  • create a new agent services account
  • obtain new agent codes
  • get new client authorisations

Write to the Agent Compliance Team

If you need to write to the Agent Compliance Team to let them know your business is changing, send your request to:

Agent Compliance Team
HM Revenue and Customs
United Kingdom
BX9 1ZE

Updates to this page

Published 17 October 2022
Last updated 19 September 2023 + show all updates

  1. Information has been added about requesting new agent codes if you’re using HMRC online services for agents.

  2. The address for the Agent Compliance Team has been updated.

  3. First published.

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