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Understanding the CT41G letter: A quick guide for companies

CT41G Corporation tax registration

Congratulations on setting up your limited company! The next step in the registration process is to register for Corporation Tax (CT). You will receive a CT41G letter within a month of opening your company. In this blog, we will unravel the purpose of this letter and what you need to do with it and address some common questions.

If you have any specific questions or concerns, why not book a free initial appointment with our accounting team to learn how to cut the cost of your Corporation Tax book an appointment here: https://calendly.com/duportaccountants

What is the CT41G letter?

The CT41G letter is sent out for various reasons:

  • Unique Taxpayer Reference (UTR): The letter provides your new company’s 10-digit UTR number, an essential Tax Identification Number for all tax matters.
  • Tax Office Number: A 3-digit code identifying your company’s Tax Office.
  • Corporation Tax Information: The CT41G includes Corporation Tax information and details on how to register whether your company is trading or dormant.

What to do with your CT41G letter:

When the letter arrives you need to read it fully and follow the instructions provided. It is good practice to keep the letter safe with your company documents for future reference.

In the past, the letter included a manual form to fill in and send back to HMRC. This form has now been phased out for limited companies and all information is to be provided online.

Decoding the letter’s instructions:

Different instructions are relevant depending on how your company was set up and its current trading status.

  • Companies Set Up via GOV.UK Service: If your company was set up directly with Companies House, not using an agent, and you registered for CT at the same time you can expect an activation code in the post for HMRC’s online services to the registered office address.
  • Trading companies set up not using the GOV.UK Service, (Duport customers fall into this category): The letter guides you to go to the Corporation Tax: trading and non-trading page, to register.
  • Non-trading or Dormant Companies not set up using GOV.UK service: If your company does not intend to trade yet (is dormant) the letter instructs you to visit the Tell HMRC your company is dormant for Corporation Tax page.
  • Authorisation of an Agent: If you wish to authorise an external agent or accountant to deal with Corporation Tax, follow the instructions to appoint an agent.

The CT41G letter should arrive at your company registered office address within 1 month of company formation. HMRC automatically send out the letter based on the information provided to Companies House at the company set-up.

If you’ve lost the CT41G letter you can request a copy of your company UTR directly from HMRC see: https://www.tax.service.gov.uk/ask-for-copy-of-your-corporation-tax-utr  To find out your office number you will need to contact HMRC directly see contact HMRC

Understanding the CT41G letter is pivotal for navigating your company’s tax responsibilities. Follow the instructions, keep the letter safe, and rest assured that you’re on the right track for a successful business journey. If you have any specific questions or concerns, why not book a free initial appointment with our accounting team to learn how to cut the cost of your Corporation Tax book an appointment here: https://calendly.com/duportaccountants