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