What is a UTR (Unique Taxpayer Reference) and how do I get one?

UTR stands for Unique Taxpayer Reference. Your UTR is a unique 10-digit number that identifies you to HMRC.  It's sometimes referred to as "Taxpayer Number" or just “Tax Reference”. Everyone using Self Assessment should have one.

Note that you cannot submit a tax return without your UTR.  It's important! You can check the format of your UTR with untied here.

What do I need it for?

You need a UTR in order to complete your tax return.  You'll also need to quote this number if contacting HMRC.  When accessing HMRC online services, you’ll often also need your Government Gateway user ID – but that's a different reference! – see our related article below.

In order to submit your tax return from the untied app you will need to enter your UTR number along with your Government Gateway ID (but you can use untied express submit if you don’t have your Government Gateway/login details to hand).

Where do I get a UTR from?

Your UTR number is assigned automatically by HMRC when you register for Self Assessment. 

Once you get your UTR number it stays with you for life!

If you aren't yet registered for Self Assessment you will need to do so if you need to submit a tax return.  untied can register you with HMRC here, or you can do this by contacting HMRC directly.

I'm registered with HMRC. Where do I find my UTR?

If you're already registered you'll find it in one of the following places:

  • In your 'welcome to Self Assessment' letter (SA250)
  • In your Self Assessment tax return
  • In your notice to file a tax return
  • In your 'Statement of Account' and payment reminders

If all this fails and you have forgotten or lost your UTR, then you should contact HMRC.

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