UK UTR Validator
Validate UK Tax Reference
Enter a UK Unique Taxpayer Reference to verify its validity.
About this Validator
This tool validates UK Unique Taxpayer References according to HMRC requirements.
The validator checks if a given UTR follows the correct format and structure.
This validation only confirms if a UTR follows the correct format. It does not verify if the number is actually registered with HMRC.
What is a UK Unique Taxpayer Reference (UTR)?
UTR Structure: • 10 digits • All numeric • Fixed format • Unique to taxpayer • Permanent identifier
Validation Features: • Length verification • Format compliance • Digit validation • Pattern check • Structure verification
Used for: • Tax returns (SA100/CT600) • Tax notifications • Account statements • HMRC correspondence • Self-assessment • Corporate tax
Important Notes: • Not on ID documents • Private to holder • Not automatically issued • Only for tax returns • HMRC controlled
If you need to generate a UTR for testing purposes, here is a UK UTR Generator