Logging into your Government Gateway Account is the simplest way to find your UTR number online.  Although there are a few other places you can check.

Your UTR (Unique Taxpayer Reference) Number is a 10 digit number that HMRC issued to you when you registered for self-employment.

A UTR number is unique to you and highly confidential, just like your National Insurance Number.

How to Find Your UTR Number Online

You can find your UTR number online in your Government Gateway account.  This is the online account you set up when you registered for self-employment online.

When you login to your HMRC account you’ll be able to see your tax returns, receive reminders and correspondence with HMRC.

Once inside your Government Gateway account, you’ll be able find your UTR number either:

  • Within the Self Assessment section;
  • The top right hand corner of your account summary.

Here’s How To Find Your UTR Number Online

Find Your UTR Number on HMRC Correspondence

As well as being able to find your UTR number online, you’ll find it on any correspondence you have from HMRC. 

Your UTR number is the way that HMRC identify you on their systems to access your personal information.

This means they use it as your reference number on all correspondence.

If you have correspondence from HMRC then you can find your UTR number on your:

  • Your HMRC Tax Return;
  • HMRC Statement of Account;
  • Payment Reminders or Late Payment Letters;
  • Your SA250 which is a letter issued by HMRC when you first registered as self-employed.

Find Your UTR Number By Phone

If you are struggling to find your UTR number online, then the best bet is to call HMRC on 0300 200 3310.

You can then request your UTR number over the phone.  Remember when you call HMRC you’ll need to confirm your identity.

Given the confidential nature of your UTR number, HMRC will need to post your UTR number out to you. It can take up to 7 days to arrive.

When Do You Get a UTR Number

You only get a UTR number if you are registered as self-employed.

Being self-employed means that:

  • You must send in a self-assessment tax return;
  • You’re responsible for calculating your own taxes;
  • You do not have the same rights as someone who is employed eg: redundancy, holiday pay or sick pay.

Being self-employed brings with it certain legal and reporting responsibilities, so you should make sure you understand these before registering.

Sharing Your UTR Number

Your UTR number is a highly confidential piece of information so you should never share it unless you’re certain it’s for the right reasons. For example:

  • You are a subcontractor and your contractor has requested it to confirm how much tax they should withhold;
  • They are a professional such as an accountant with the authority to act on your behalf.

If you are unsure whether your UTR number is valid or you need to check it, then always contact HMRC first on 0300 200 3310.


Anita is a Chartered Accountant with over a decade of experience taking self employed business owners from financially confused to business savvy.
She is the creator of the ‘Go Self Employed’ website, which her corner on the internet where she makes self employment less terrifying.