UTR (Unique Taxpayer Reference)
UK tax glossary · Last reviewed: April 2026
You receive a UTR when you register as self-employed or for Self Assessment. You need it to file returns and communicate with HMRC about your personal tax.
Allow up to 10 working days after registering for your UTR letter to arrive.
TaxHelper provides general information based on published HMRC rates and guidance. It is not regulated financial or tax advice. For decisions involving significant sums, complex circumstances, or if you are unsure, speak to a qualified accountant or HMRC directly.