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Where to find your Company Registration Number

What is your Company Registration Number (CRN)?

A Company Registration Number (CRN) is a unique number issued by Companies House when a limited company is formed. It will be displayed on your certificate of incorporation and any statutory company mail sent from Companies House.

Your CRN will consists of eight number or two letters followed by six numbers.


Where can I find my CRN?

Luckily your CRN is public information and can be found on the Companies House Register when you input your company name.


When will I use the CRN?

You must display your company registration number on all forms of business correspondence, including:

  • Official letters, faxes and emails
  • Order forms
  • Invoices and Receipts
  • Websites

You will also need to provide your CRN when are you trying to do the following:

  • File Annual Accounts
  • Pay Corporation Tax
  • File Company Tax Returns
  • File Annual Returns
  • Change your company name
  • Change your registered office address
  • Add or remove a company director or secretary
  • Change the details of directors or secretaries
  • File copies of resolutions
  • Increase share capital
  • Issue share certificates
  • Issue dividend vouchers
  • Change your accounting reference date (ARD)


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