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Do sole traders get a company registration number?

Profile picture of Rachel Craig.

Senior Technical Writer

Last Updated: | 4 min read
Last updated: 5 Mar 2025

Upon registering as a sole trader, some individuals expect to be allocated a company registration number (CRN). However, sole traders do not receive this. In this article, we explain why they do not get a CRN and look at what they receive instead.

What entities receive a company registration number?

Only business entities registered with Companies House are given a company registration number in the UK. This includes:

  • Private companies limited by shares
  • Private companies limited by guarantee
  • Limited liability partnerships
  • Public limited companies
  • Private unlimited companies

The sole trader business model is not a type of company, and so it does not receive a CRN.

What do sole traders receive instead of a company registration number?

There is no sole trader equivalent of the company registration number.

After a person has registered as a sole trader with HMRC, they will automatically receive a unique taxpayer reference (UTR). This is a 10-digit number that is typically formatted in the following way: 9876543210 (sometimes a ‘K’ is included at the end of the number).

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  • It would be inaccurate to say that the UTR is the sole trader version of the CRN. They serve wholly different functions, and companies actually receive their own UTRs anyway (this means some company directors will have two UTRs; a personal one and a company one).

    The only similarity that the company registration number and unique tax reference share is that they’re both automatically assigned upon registration.

    The CRN and UTR must be handled differently

    Individuals should only share their UTR with their accountant, financial advisor, HMRC, and sometimes with their bank. It should not be passed on to anyone else or published on a business’ website, letterheads, stationery, or invoices.

    In the wrong hands, the UTR can be used to commit identity fraud. If the confidential status of a UTR is compromised, HMRC should be contacted immediately. If a sole trader is uncertain about handing over their UTR, they should check with HMRC first.

    On the other hand, the CRN is made publicly available on the Companies House register from the moment a company is registered, and as this indicates, no harm can be done with the CRN by itself.

    What is the unique taxpayer reference used for?

    The UTR is used to identify a self-employed person for tax purposes. This means it needs to be provided to HMRC (or an accountant) when dealing with any tax matters, such as:

    The company registration number is used when a company:

    • Deals with HMRC, such as reporting dormant status, registering for Corporation Tax, and registering for VAT
    • Files anything with Companies House, such as a confirmation statement, annual accounts, or a director appointment form
    • Completes general admin tasks, such as sending invoices, opening a business bank account, and creating share certificates

    What other reference numbers and codes do sole traders receive?

    As well as the unique taxpayer reference, a sole trader may have a:

    • Government Gateway ID (and password) to use HMRC’s online tax services. A sole trader may not have this if an accountant handles their tax affairs.
    • Employer PAYE reference if the business employs other people.
    • VAT registration number if the business has registered for VAT. This is compulsory if a business’ turnover exceeds the £90,000 VAT threshold and optional if it doesn’t. If a sole trader has registered for VAT, they must include the VAT registration number on their invoices.

    How can a sole trader get a company registration number?

    A sole trader can only obtain a CRN by converting their business into a company by registering with Companies House. There are several benefits to be had from doing this, which we cover in more detail in ‘Sole trader or limited company?’. However, to summarise, by switching from a sole trader business structure to a limited company, a business owner can:

    Protect their finances

    When operating as a sole trader, there is no distinction between the individual and the business; they are the same entity. If debts are accrued, the business owner must pay out of their own finances. In a limited company, the shareholders (who own the company) are only liable for the unpaid nominal value of their shareholding.

    Impress with an esteemed business structure

    A limited company is more likely to secure new business and investment because of the professional image that the structure provides. By comparison, the sole trader business model, rightly or wrongly, is often associated with a level of amateurism.

    Take advantage of tax efficiency

    While this depends on a business’s specific circumstances, the general consensus is that limited companies are more tax efficient when compared to the sole trader model.

    Wrapping up

    Sole traders do not receive a company registration number, as these are the domain of businesses (companies) registered at Companies House. Sole traders receive a unique taxpayer reference, but other than the fact that this is automatically issued upon registration, this has no real similarity to the company registration number

    If you are a sole trader who wishes to convert to a limited company, we can help you make the switch with our company registration services. The company registration process is simple and prices start from only £2.99 (not including the Companies House filing fee of £50.00). All you need to do is pick your company name, choose your package, make payment, and then provide some details about your new company.

    It’s entirely online and you’ll typically be in possession of a company registration number (and Certificate of Incorporation) within 24 hours.

  • Take a look at our company registration packages now
  • Thanks for reading. Please leave a comment if you have any questions and we’ll get in touch as soon as possible.

    Please note that the information provided in this article is for general informational purposes only and does not constitute legal, tax, or professional advice. While our aim is that the content is accurate and up to date, it should not be relied upon as a substitute for tailored advice from qualified professionals. We strongly recommend that you seek independent legal and tax advice specific to your circumstances before acting on any information contained in this article. We accept no responsibility or liability for any loss or damage that may result from your reliance on the information provided in this article. Use of the information contained in this article is entirely at your own risk.

    About The Author

    Profile picture of Rachel Craig.

    Rachel is a Senior Technical Writer with Rapid Formations and is responsible for the successful delivery and development of our products. Joining the company in 2013, Rachel is recognised as an expert in this industry and is highly knowledgeable in company formation, corporate compliance, and company law.

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