What is a UTR number? UTR Registration by KPN Accounting Ltd

What is a UTR number?

A UTR number, or Unique Taxpayer Reference, is a 10-digit code assigned to you when you register for Self-Assessment or operate a limited company. Issued by HMRC (Her Majesty’s Revenue and Customs), it typically appears as a sequence like 9876543211, though in some cases it may end with the letter “K”.


The UTR number serves as a Tax Identification Number for self-employed individuals or sole traders. Once issued, you can use your UTR to file your self-assessment with HMRC, enabling you to either claim a tax rebate or pay any tax owed.

We assist individuals and businesses who frequently ask, “How do I register as a sole trader?”, “What’s involved in becoming a sole trader?”, and “How do I complete the sole trader registration process?”.

How to apply for a UTR number?

If you’re planning to work as self-employed, you’ll need to apply for a UTR number from HMRC.

This Unique Tax Reference number is used to identify you for tax purposes.

At KPN Accounting, we can handle the application process on your behalf, submitting it directly to HMRC.

Once submitted, HMRC typically issues your UTR number within 10 working days.

What information is needed to apply for a UTR number?

To apply for a UTR number, you need the following information ready

  • Your Full name
  • Your Phone number and Email address
  • Your present resident address
  • Your Date of Birth
  • Your National Insurance
  • Date started working as self-employed
  • Type of work you are going to start as self-employed

Once you have all the above information you are ready to submit the UTR application. We may also require verifying your identification to complete the application. Types of Identification documents required are:


Photo ID: UK Passport or Driving License
Address ID: Recent bank statement or recent utility bill (within the last 3 months)

Who needs a UTR number?

In the UK, individuals working as employees under PAYE (Pay As You Earn) typically don’t need to file a self-assessment, as their employer deducts and pays their tax directly to HMRC. However, when you become self-employed, operate as a sole trader, or register a limited company, you must apply for a Unique Taxpayer Reference (UTR) and submit annual tax returns to HMRC.

You are also required to apply for a UTR number if:

  • You want to claim your tax back through a Self-Assessment Tax Return
  • Your earnings are more than £100,000 during a tax year
Who needs a UTR number?

How long does it take to get a UTR number?

Once you’ve applied for a UTR number, it typically takes 6-8 weeks to receive it. However, if you register through us at KPN Accounting, we’ll submit your application within 24 hours, and HMRC will assign your UTR number within 10 working days.

As a specialist HMRC agent, we handle the entire process on your behalf, ensuring smooth registration for self-employment.

Additionally, we offer Yearly Accounting Support, assisting with your Self-Assessment Tax Return should you choose to partner with us for ongoing tax management.

How to find a lost UTR number?

If you have lost your UTR. KPN Accounting can help you find it.

Your UTR number can be found on any of your reminder letters from HMRC to Submit your Self-Assessment Tax Return, or on your last Tax Return documents.

You can always call HMRC 0300 200 3310 to ask for your UTR number.

Why choose KPN Accounting Ltd to help you apply for a UTR number?

Carrying out your UTR registration through us rather than other companies is the simplest and most convenient way to become UTR registered and Self-Employed.

The UTR application can be completed in a couple of minutes online and will be submitted to HMRC within 24hrs.

If you would like KPN Accounting to be able to speak to the HMRC and handle the management of your UTR number online application, you will need to sign the client authorisation form (64-8 form) that we will email to you once you have signed up.

All we ask is that you consider using our company’s professional accountancy team to support you through the year and to file your end-of-year Tax Returns.

We know that applications for UTR numbers can be confusing, but we simplify the entire process for you, giving you the confidence to know that you will not overpay income tax throughout the year.

Why choose KPN Accounting Ltd to help you apply for a UTR number?

KPN Accounting is a privately owned, independent company.

We are not HMRC, we are an authorised agent of HMRC, which means we can speak to them on your behalf; but we are not, nor do we give the impression that we are endorsed by HMRC.

For further questions, please contact us using the button below.