You’ll automatically be sent a Unique Taxpayer Reference (UTR) when you:
- register for Self Assessment
- set up a limited company
It’s a 10-digit number. It might just be called ‘tax reference’.
Where to find your UTR
Your UTR is on previous tax returns and other documents from HMRC, for example:
- notices to file a return
- payment reminders
You can also find your UTR in your HMRC online account.
If you cannot find your UTR
Call the Self Assessment helpline to request your UTR if you cannot find any documents from HMRC.
If you have a limited company, you can request your Corporation Tax UTR online. HMRC will send it to the business address that’s registered with Companies House.