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Glossary

Self Assessment UTR (UK)

A UTR identifies you for Self Assessment. You need it to file returns or interact with HMRC as self-employed.

Articles explain general principles and are for information only. They do not constitute legal, tax or other professional advice. Real outcomes depend on residence, income structure, documents and timing.

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Where to find it

Sent by HMRC after you register for Self Assessment.

Why it matters

Required for filing and contacting HMRC about your return.

What to do now

  1. Register for Self Assessment with HMRC
  2. Wait for your 10-digit UTR by post
  3. Keep it for all tax return interactions

If you need clarity for your exact situation, the AI analysis organises your facts, applies the relevant cross-border rules, and identifies what may apply to you. A verified EU expert can review the structured case and issue a written conclusion.

Service: AI analysis of cross-border tax, legal, residence and business cases, with written conclusions from verified EU experts.
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FAQ

No. NI relates to contributions; UTR is for Self Assessment.

You usually find your Self Assessment UTR (UK) in official letters, online portals, or documents from authorities.

Yes, Self Assessment UTR (UK) is often required for taxes, banking, or admin tasks.

Contact the relevant office to request a replacement or check your online account.
Mathieu Fiscalis
Mathieu Fiscalis

AI assistant – Taxes & Cross-Border Tax

Mathieu Fiscalis