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HMRC letter codes · Corporation Tax (CT)

CT41GInformation for a newly incorporated company

Last reviewed 14 October 2026 · How Tax Letters checks its facts

In short

The CT41G is issued automatically the next day after Companies House accepts a company's incorporation, once details have been sent to HMRC and the company's record has been set up successfully, says HMRC's internal manual.

“When a company’s incorporation is accepted by Companies House, details are sent electronically to HM Revenue and Customs and a COTAX record is automatically set up. Where the COTAX record has been set up successfully, form CT41G is issued automatically the next day and the case does not require any manual action.”

HMRC COTAX Manual: COM40070, Case records: new company records: new cases in the CT responsible office · checked 14 October 2026

Information, not advice: this page reports what HMRC, GOV.UK and the bodies named publish about CT41G. Each fact has its source and the day it was checked beside it.

What it is

HMRC's internal manual lists the CT41G as the Corporation Tax information for new companies form.

“CT41G Corporation Tax information for new companies form.”

HMRC COTAX Manual: COM40021, Case records: new company records: forms · checked 14 October 2026

HMRC's internal manual forms index says the CT41G is issued to provide information to newly incorporated companies.

“Issued to provide information to newly incorporated companies. Note: issued by COTAX from April 2019.”

HMRC COTAX Manual: COM150, Forms index · checked 14 October 2026

When HMRC sends it

Until form CT41G is issued, HMRC's internal manual says the company does not know its Unique Taxpayer Reference (UTR) and cannot contact HMRC or register to use HMRC's online services.

“Until form CT41G is issued, the company does not know its Unique Taxpayer Reference (UTR) and cannot contact HMRC or register to use our online services.”

HMRC COTAX Manual: COM40070, Case records: new company records: new cases in the CT responsible office · checked 14 October 2026

What it asks

HMRC's internal manual says that if a company cannot supply all the information when it is formed because it does not intend to trade immediately, the CT41G asks it to supply the information through the Online Tax Registration Service.

“If a company is unable to supply all the information at the time of forming the company because they do not intend to trade immediately, the CT41G asks them to supply the information through the Online Tax Registration Service (OTRS).”

HMRC COTAX Manual: COM40070, Case records: new company records: new cases in the CT responsible office · checked 14 October 2026

How to send it or apply

For a company with a CT41G, GOV.UK's Corporation Tax page says you get the option to be set up for Corporation Tax at the same time as registering the company, and that if you do not, you need to add Corporation Tax services to your business tax account.

“You’ll get the option to be set up for Corporation Tax at the same time. If you do not set up Corporation Tax at the same time as registering your company, you’ll need to add Corporation Tax services to your business tax account.”

GOV.UK: Corporation Tax · checked 14 October 2026

Free help and HMRC contacts

For questions about the CT41G, GOV.UK's Corporation Tax general enquiries page says to have your 10 digit Unique Taxpayer Reference (UTR), which is on all letters from HMRC and HMRC online services. It says advisers cannot give you this reference over the phone, and that you can ask for a copy of your Corporation Tax UTR if you do not know it.

“You’ll need your 10 digit Unique Taxpayer Reference (UTR) that will be on all letters from HMRC and HMRC online services. Our advisers cannot give you this reference over the phone. You can ask for a copy of your Corporation Tax UTR if you do not know it.”

GOV.UK: Corporation Tax: general enquiries · checked 14 October 2026

For questions about the CT41G, HMRC's Corporation Tax enquiries line (GOV.UK) is 0300 200 3410, open Monday to Friday, 8am to 6pm and closed on bank holidays. GOV.UK has a “Find out about call charges” link.

“Call HMRC for help with general Corporation Tax enquiries. … Telephone: 0300 200 3410 … Opening times: Monday to Friday: 8am to 6pm. Closed bank holidays … Find out about call charges”

GOV.UK: Corporation Tax: general enquiries · checked 14 October 2026

Free help first

These routes are described by GOV.UK, TaxAid and Citizens Advice themselves.

  • HMRC's extra supportHMRC offers extra support if your health condition or personal circumstances make it difficult to contact HMRC, for example a mental health condition, financial hardship or being treated in hospital.
  • Someone to deal with HMRC for youYou can authorise a friend, relative or voluntary organisation to talk to HMRC for you and help you fill in forms.
  • TaxAidTaxAid helps people with tax problems who cannot pay for advice. Tax Help for Older People merged with TaxAid in July 2025.
  • Citizens AdviceCitizens Advice gives confidential advice online, over the phone and in person, for free.