HMRC Authorised Agent

UTR Number — What It Is & How to Register

A UTR (Unique Taxpayer Reference) is the 10-digit number HMRC assigns every UK freelancer, sole trader, and self-employed worker. Tax2u handles your HMRC registration from £24 + VAT — so you understand what a UTR is and have yours on record quickly.

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HMRC submission within 24 hours Interim confirmation letter Full application status tracking UTR stored securely in your account
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About UTR Numbers

What Is a UTR Number?

A Unique Taxpayer Reference (UTR) is the 10-digit number HMRC assigns to your tax record when you register as self-employed. Without it, you cannot file a Self Assessment tax return. Below is everything you need to know before applying.

10Digits in every UTR number
3–6wkHMRC delivery time after submission
£100Minimum HMRC penalty for late registration
24hTax2u typical HMRC submission time
UTR Number Format
Your UTR is always exactly 10 digits — for example, 1234567890. It may appear with a leading "K" on some HMRC letters (e.g. K1234567890) but the core reference is always numeric. Never confuse it with your National Insurance number, which contains letters.
Where to Find Your Existing UTR
If you've been registered before, find your UTR on any HMRC Self Assessment letter, your SA100 tax return, or by logging into your Personal Tax Account at gov.uk. It appears on all HMRC correspondence headed "Self Assessment."
UTR vs National Insurance Number
Your NI number (e.g. QQ 12 34 56 A) covers National Insurance contributions and employment records. Your UTR is separate — issued only by HMRC for Self Assessment — and is not visible to employers or the DWP.
What HMRC Uses Your UTR For
HMRC links your UTR to every Self Assessment return you file, every payment you make, and every piece of correspondence about your tax. You'll need it to register for VAT, set up a payment reference, and authorise a tax agent like Tax2u to act on your behalf.
Process

How Tax2u Gets Your UTR Number

Three steps — completed entirely online. No HMRC portals, no call queues, no paperwork to post.

1
Complete Our Online Form
Fill in your name, address, National Insurance number, and business start date. Attach photo ID and proof of address. Takes around 5 minutes.
2
Tax2u Submits to HMRC
As your HMRC Authorised Agent, we submit your Self Assessment registration within 24 hours. We manage all HMRC correspondence on your behalf.
3
UTR Arrives by Post
HMRC posts your UTR in a letter to your registered address — typically 10–15 working days from submission. We confirm receipt with you.
Common Questions

UTR Number FAQs

Do I need a UTR if I'm newly self-employed?
Yes. HMRC requires you to register for Self Assessment as soon as you begin self-employed work — even if your income is below the Personal Allowance. The registration deadline is 5 October in the tax year following the one you started trading.
How long does HMRC take to issue a UTR?
HMRC typically issues the UTR letter within 10 working days of processing your application. Tax2u submits within 24 hours of receiving your form, so the total time from order to delivery is usually 2–3 weeks.
Can I get my UTR number faster?
HMRC does not offer an expedited UTR service. All letters are sent by standard post. Tax2u ensures your application reaches HMRC within 24 hours so your wait starts immediately — and we provide a signed submission confirmation you can show clients in the meantime.
What if I've already lost my UTR number?
Check any HMRC Self Assessment letter, your SA100, or log into gov.uk/personal-tax-account. You can also call the HMRC Self Assessment helpline (0300 200 3310) to confirm it. If you have a Tax2u account, your UTR is stored securely there.
Trustpilot Reviews

8,000+ Self-Employed Workers Registered

★★★★★
"Got my UTR in just under 2 weeks. Filled in the form, Tax2u handled the rest. Brilliant — exactly what I needed as a new freelancer."
Mohammed A.
August 2025
★★★★★
"I had no idea how to get a UTR. Tax2u explained everything clearly and submitted the same day. Really professional service."
Sarah K.
July 2025
★★★★★
"As someone who just went self-employed, I was completely lost. Tax2u made it completely stress-free. The whole process took 5 minutes."
Daniel M.
June 2025

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