Glossary · UK
What is UTR (Unique Taxpayer Reference)?
10-digit HMRC reference number for self-employed, landlords, and Self Assessment filers.
Full Definition
A UTR (Unique Taxpayer Reference) is a 10-digit personal identifier issued by HMRC when you register for Self Assessment, set up a limited company, or otherwise need to file a tax return outside PAYE. Required for: filing Self Assessment, accessing your Personal Tax Account, contacting HMRC about Self Assessment matters, partnership tax returns. Find your UTR on previous Self Assessment correspondence, your HMRC online account, or the «Welcome to Self Assessment» letter from when you registered. Don't confuse with your National Insurance number (used for PAYE/employment) — both can apply to one person.
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Disclaimer: Definitions are for guidance only. For decisions about your tax, savings, property or pension situation, always consult a qualified professional or refer to gov.uk.