What is a UTR Number: Here’s Everything You Need to Know


Being self employed is full of lots of new concepts, including understanding your UTR number.

Here is everything you need to know about your UTR number, where you find it and why you need one.

utr number

What is a UTR number?

UTR stands for Unique Taxpayer Reference.  

It is a 10 digit number that HMRC issued to you when you registered successfully for self employment or any other reason that means you need to file a self assessment tax return.

Your UTR number is unique to you. HMRC use it to identify you, just like your passport number or national insurance number. For this reason it is really important you hold onto it and keep it confidential.

Every time you speak to HMRC on a self employment issue they will ask you to provide your personal details, including this 10 digit number. That way they know they are speaking to the right person


How To Find Your UTR number

Your unique reference number will be shown on any correspondence you receive from HMRC.

On HMRC Correspondence

Here are some of typical HMRC documents where you will be able to find it:

  • Your HMRC Tax Return;
  • HMRC Statement of Account;
  • HMRC Payment Reminders or Late Payment Letters;
  • Your SA250 which is a letter issued when you first registering for self assessment notifying of successful registration;
  • Online in your Government Gateway account (your online HMRC account which you set up when registering for self employment).


By Looking Online

Your UTR number can be found online in your Government Gateway account.

Here’s a quick video tutorial to show you how to find your UTR number online.

If you registered for self employment online, you will have been required to set up an online account to manage your registration process, personal tax returns, reminder and correspondence with HMRC.  

Call the HMRC UTR number helpline

The final way you can find your UTR number is to call HMRC.  Their phone number 0300 200 3310.

When you call you will be asked a series of questions to confirm your identity.


Due to the confidential nature of your UTR number, any reminders of it will need to be posted out to you. That means it will take up to 7 days to get to you.  Make sure you allow for this time, whatever your reason for trying to find your UTR number.

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