If you have tried filing a tax return or setting up a limited company, you will know how important your Unique Taxpayer Reference (UTR) number is. This 10-digit code is more than just a formality as it acts as the key to all your dealings with HMRC. The problem is that many people struggle to locate it when they need it most. You might be a sole trader trying to check a UTR number for your Self Assessment, or a company director facing difficulty finding a company UTR number.
Whatever your situation, the process can be frustrating. This guide explains exactly where to find your UTR, how to recover it if it is missing, and how to keep it safe so you are never caught out again.
When and How Do You Get a UTR Number?
Registering for Self Assessment
If you earn money as a sole trader, from renting out property, or through side income that is not taxed at source, you must register for Self Assessment. Once you register, HMRC automatically issues your UTR number and sends it to you by post.
Most people receive their UTR within 10 to 15 days. If you are based overseas, it can take longer. To avoid delays, register well before the deadline of 5 October, following the end of the tax year in which you became self-employed.
Setting Up a Limited Company
When you form a limited company with Companies House, HMRC will send a UTR number to your registered office address. This number identifies your company for Corporation Tax purposes. It will be needed for filing company accounts, paying Corporation Tax, and dealing with other HMRC obligations.
Keep this letter safe. Many directors run into difficulty finding a company’s UTR number because the letter is misplaced or sent to an address they no longer use.
Where to Find UTR – For Individuals and Sole Traders
If you are an individual or sole trader, you can find your UTR in several places:
HMRC correspondence: Check any letters about Self Assessment, payment reminders, or notices to file a tax return. Your UTR will be printed near the top, often labelled as “Tax Reference”.
Personal Tax Account: Log in to your Personal Tax Account online, where your UTR is shown in the Self Assessment section.
HMRC app: If you use the official app, you can view your UTR on your smartphone whenever you need it.
Government Gateway account: After logging in, your UTR appears under the Self Assessment section of your account summary.
If you want to check a UTR number you already have, these online services are the quickest and most reliable way to confirm it is correct.
Where to Find UTR – For Companies and Organisations
For companies, partnerships, or trusts, your UTR can be found on official HMRC documents linked to Corporation Tax. This includes letters about payment deadlines, tax returns, and reminders.
Directors and authorised agents can also log into the Corporation Tax online service to view the company’s UTR.
If you are having difficulty finding a company’s UTR number, the best steps are:
- Search through the company’s HMRC correspondence, especially the letter issued shortly after incorporation.
- Ask the company’s accountant, if one is appointed, as they may have stored the UTR securely.
- Contact HMRC directly if you cannot locate it through these methods.
What to Do if You Cannot Find Your UTR Number
Losing your UTR can feel stressful, but it is simple to recover it. Here are the steps to follow:
1. Check your online accounts
Log in to your Personal Tax Account, HMRC app, or Government Gateway. Your UTR will always appear under the Self Assessment or Corporation Tax sections.
2. Search your HMRC correspondence
Look at letters and emails from HMRC. Your UTR is usually displayed at the top and may appear as “Reference” or “Tax Reference”.
3. Contact HMRC directly
If you cannot find your UTR anywhere, call or write to HMRC. They will confirm your identity before sending your UTR by post. For security reasons, they will not provide it over email or text.
By following these steps, you can resolve any issue with a missing UTR and avoid delays when filing your tax return.
How to Check a UTR Number for Accuracy?
Sometimes people are unsure whether the number they have is correct. To check a UTR number, confirm that:
- It has 10 digits only.
- It was issued directly by HMRC.
- It appears consistently across your official documents or online accounts.
Do not rely on numbers provided by third parties. If in doubt, always log into your HMRC account or call HMRC to verify it. This ensures that you are using the right reference when filing taxes or contacting HMRC.
The Bottom Line
Finding your UTR number does not need to be difficult. Whether you are self-employed and need to check a UTR number for your Self Assessment, or you are a company director facing difficulty finding a company UTR number, the solutions are straightforward. Start by checking your HMRC correspondence and online accounts, and if all else fails, contact HMRC directly.
Your UTR is the gateway to managing your taxes, so keep it safe and accessible. With the right approach, you will always know exactly where to find your UTR when you need it most.
Frequently Asked Questions
Q: Is a UTR the same as a Company Registration Number?
Ans: No. A UTR is issued by HMRC for tax purposes, while a Company Registration Number comes from Companies House. They serve different functions.
Q: Can I apply for a UTR online?
Ans: Yes. You receive one when you register for Self Assessment online. Limited companies automatically receive one when registered with Companies House.
Q: How long does it take to receive a UTR?
Ans: Usually, 10 to 15 days if you live in the UK. It may take longer if you live overseas.
Q: What happens if I do not have a UTR when filing taxes?
Ans: You cannot file a tax return without it. Missing the deadline can result in penalties from HMRC, so always secure your UTR well in advance.



