How to Find Your UTR Number (The Easy Way)
Your Unique Taxpayer Reference — Found in Minutes
Your Unique Taxpayer Reference (UTR) is essential for filing your Self Assessment, yet it’s surprisingly easy to misplace. If you’re staring at your tax return form with a blank space where your 10-digit UTR should go, don’t panic.
This guide walks you through the quickest and easiest ways to find your UTR number, from using the HMRC app to checking your old paperwork. Follow these steps, and you’ll have your UTR in minutes.
Before You Start: Your UTR is a 10-digit number (e.g., 1234567890) and may appear with a ‘K’ at the end on some documents. It is not your National Insurance number, which is a 9-character mix of letters and numbers.
📱 The Quickest Way — Use the HMRC App
HMRC actively promotes its app as the fastest way to find your UTR. It’s free, secure, and available 24/7.
HMRC’s Advice: “You can use the app at any time to find your unique taxpayer reference, so you won’t need to call us once you’ve used the app.”
💻 Use Your HMRC Online Account
If you prefer using a computer, your HMRC online account is another excellent option.
This is often the quickest method if you already have your login details to hand and don’t have the app installed.
📄 Check Your Paperwork
Your UTR appears on almost every official document HMRC sends you. Check these common sources:
- The Welcome Letter (SA250): When you first registered for Self Assessment, HMRC sent you a “Welcome to Self Assessment” letter. Your UTR is printed clearly at the top.
- Previous Tax Returns: Look at any Self Assessment tax returns you’ve filed in the past.
- SA302 Tax Calculations: This official tax calculation document includes your UTR at the top.
- Payment Reminders or Statements: HMRC includes your UTR on any reminders to file a return, payment statements, or notices to file.
💡 Pro Tip: Your UTR stays with you for life, so once you find it, make a note of it and store it securely alongside other important tax documents.
🖥️ Check Your Tax Software or Ask Your Accountant
If you use accounting software or have an accountant, your UTR may be readily available there.
- Tax Software (e.g., TaxCalc, FreeAgent): Your UTR is often displayed in your profile or on generated documents like the SA302 summary.
- Your Accountant: As a registered HMRC Agent, we have your UTR on file if you have used our services before. You can also ask any other tax professional you’ve worked with.
Need to find your UTR quickly? Contact our team →
What If You Still Can’t Find Your UTR?
If you’ve tried all the methods above and your UTR is still nowhere to be found, you have two options:
📞 Option 1: Contact HMRC Directly
You can call the HMRC Self Assessment helpline on 0300 200 3310. Be prepared:
- You’ll need to pass security checks (have your National Insurance number and personal details ready).
- HMRC will not give you your UTR over the phone for security reasons. They can only send it by post to your registered address.
- This process can take 10 to 15 days, so it’s not ideal if you’re on a tight deadline.
⚡ Option 2: Let Us Find It For You (The Fast-Track Option)
As a registered HMRC Agent, we have a dedicated Agent Support Line. This means we can often retrieve your UTR for you much faster than you can on your own.
We can:
- Contact HMRC on your behalf using our secure agent channels
- Verify your identity through our systems
- Retrieve your UTR without you having to wait on hold or wait for a letter
This is especially useful if you’ve recently moved, changed your name, or are facing an imminent filing deadline.
Your UTR Number: A Quick Summary
Here’s a recap of the key points to remember about your UTR:
| Question | Answer |
|---|---|
| What format is it? | A 10-digit number (e.g., 1234567890). It may be followed by a ‘K’ in payment references. |
| Does it change? | No. Your UTR stays with you for life, even if you move or change jobs. |
| Can I get it by phone? | No. HMRC will not give it to you over the phone; they will only post it to your registered address. |
| Is it the same as my NINO? | No. Your NINO is for National Insurance and state benefits. Your UTR is for your tax bill. |
Related guide: What is a UTR Number? (And Why Every UK Taxpayer Needs One) →
Frequently Asked Questions
How can I find my UTR number online?
You can find your UTR online by logging into your HMRC Personal Tax Account via the Government Gateway, or by using the official HMRC app. Both methods display your 10-digit UTR clearly in the Self Assessment section.
Is my UTR the same as my National Insurance number?
No. Your National Insurance number (NINO) is a 9-character mix of letters and numbers used for state benefits and employment. Your UTR is a 10-digit number used specifically for Self Assessment tax returns.
Can I get my UTR over the phone from HMRC?
No. For security reasons, HMRC will not give you your UTR over the phone. They can only send it by post to your registered address, which can take 10-15 days.
What do I do if I’ve lost my UTR and need it urgently?
Contact us as a registered HMRC Agent. We have a dedicated Agent Support Line and can often retrieve your UTR much faster than you can on your own — without you waiting on hold or for a letter.
Does my UTR expire or change?
No. Your UTR is for life. It stays with you even if you change jobs, move abroad, or stop filing for a while. However, if you don’t use it for several years, HMRC may mark it as ‘dormant’ — you’ll need to contact them to reactivate it.
Where can I find my UTR on old tax returns?
Your UTR appears at the top of every Self Assessment tax return you’ve filed, as well as on SA302 tax calculation documents and HMRC payment reminders.
Next Steps: Get Your Tax Documents Organised
Now that you know how to find your UTR, the next step is to gather all the other documents you need for a smooth Self Assessment filing.
Having everything organised before you start will save you time and stress. From P60s and expense receipts to records of untaxed income, being prepared is half the battle.
Get started with our complete checklist: What Documents Do You Need for Tax Return UK? →
Ready to file your Self Assessment? Our fixed-fee service handles everything for you, from finding your UTR to submitting your return.
Fixed fee from £99 for standard Self Assessment — with seasonal offers available on our pricing page.
How it works: Simply complete our enquiry form and our ACCA team will handle everything, including retrieving your UTR if needed.