If you’re self-employed, running a business, or about to file your first tax return, there’s one small but mighty number you can’t do without: your UTR. Short for Unique Taxpayer Reference, this 10-digit code is HMRC’s way of recognising you (or your company) in the tax system, ensuring your payments, returns, and refunds are linked to the right account. Whether you’re chasing a tax refund, registering for Self Assessment, or launching a limited company, knowing how to get a UTR number quickly is essential.
In this blog, we’ll break down exactly what a UTR number is, who needs one, how to apply for a UTR number online, and how long it takes to get yours, so you can get on with running your business without HMRC breathing down your neck.
What is a UTR Number?
A UTR number, short for Unique Taxpayer Reference, is a 10-digit code issued by HM Revenue & Customs (HMRC) to identify you or your business in the UK tax system. Think of it as a digital fingerprint that links all your tax records, payments, and correspondence to your account.
If you’re an individual, this is called your personal UTR number. If you run a company or partnership, you’ll have a business UTR number, and in many cases, you’ll need both.
What does a UTR number look like?
It’s simply a string of 10 digits (for example: 12345 67890) that appears on official HMRC letters, your online HMRC account, or the HMRC app. You’ll also see it on your “Welcome to Self Assessment” letter (SA250) and tax return reminders.
Who Needs a UTR Number?
You’ll need a UTR number if you:
- Register for Self Assessment as a sole trader, freelancer, or landlord.
- Run a limited company and need to file Corporation Tax returns.
- Operate as a partnership (each partner also needs a personal UTR number).
- Claim tax refunds under the Construction Industry Scheme (CIS).
In short, if HMRC expects you to submit a tax return, you’ll need a UTR to do it. Without one, you won’t be able to file online, pay your taxes correctly, or get tax refunds.
Why a UTR Number is Important
Your UTR number is far more than a formality; it’s the key that unlocks your tax account with HMRC. You’ll need it when:
- Filing annual tax returns.
- Paying your tax bill or claiming a refund.
- Communicating with HMRC.
- Working with an accountant or bookkeeper.
Without it, your tax payments could be delayed or misallocated, which may lead to penalties.
How to Apply for a UTR Number
1. Apply for UTR Number Online (fastest method)
The quickest way to get your UTR is to register for Self Assessment online on HMRC’s website. You’ll enter your personal and/or business details, and HMRC will send your UTR number by post within 10 working days (21 if abroad).
You’ll need to provide:
- Full name, date of birth, and address.
- National Insurance number.
- Email and phone number.
- Business start date, type, and address (if applicable).
2. Apply by Phone
You can call HMRC’s Self Assessment helpline (0300 200 3310). They may direct you to apply online, but they can also help if you’re unable to register digitally.
3. Apply by Post
You can write to HMRC requesting your UTR. This is the slowest method and can take several weeks, so it’s not ideal if you have an urgent filing deadline.
Information You Need to Register for a UTR
When you register for Self Assessment, be ready with:
- Personal details (name, address, date of birth).
- National Insurance number.
- Contact details (phone, email).
- Business start date and structure (sole trader, limited company, partnership).
How Long Does it Take to Get a UTR Number?
If you apply online, you should receive your UTR in around 10 working days (UK addresses) or up to 21 working days (overseas addresses). During busy tax seasons, it may take longer, so it’s best to register as soon as you become self-employed or set up your company.
Different Types of UTR Numbers
Not all UTR numbers are the same – the type you need depends on your circumstances:
- Personal UTR Number: For individuals filing their own Self Assessment tax return.
- Self-Employed UTR Number: Issued when you register as a sole trader or freelancer.
- Limited Company UTR Number: Given when you incorporate a company with Companies House, used for Corporation Tax.
- Partnership UTR Number: A unique reference for the partnership itself, plus personal UTRs for each partner.
- Business UTR Number: A general term for UTRs assigned to businesses, including limited companies and partnerships.
- Company UTR Number Online: You can view your company’s UTR in your HMRC online account or request it through the Corporation Tax section.
How to Find an Existing UTR Number
If you’ve already registered for Self Assessment or Corporation Tax, HMRC has issued you a UTR. You can find it:
- In your personal tax account via the Government Gateway.
- On the HMRC app.
- For more details, visit here:
What to Do if You’ve Lost Your UTR Number
Losing your UTR isn’t the end of the world – but you must recover it promptly.
- Check old HMRC letters and tax returns.
- Log in to your HMRC online account or app.
- Call HMRC’s Self Assessment helpline and confirm your identity.
Important: Keep your UTR number secure. Fraudsters can use it for identity theft or tax scams.
Using Your UTR Number
You’ll use your UTR whenever you interact with HMRC, such as:
- Filing Self Assessment or Corporation Tax returns.
- Making tax payments.
- Registering for Making Tax Digital (MTD).
- Claiming Construction Industry Scheme (CIS) refunds.
You should share your UTR only with HMRC, your accountant, or authorised tax agents, and never publicly.
The Bottom Line
Your UTR number is essential for staying compliant with HMRC, whether you’re self-employed, a landlord, or running a limited company. Applying is quick and easy, especially if you apply for a UTR number online and ensures your tax returns, payments, and refunds are processed smoothly.
Don’t wait until the last minute. Register for Self Assessment as soon as possible, secure your UTR, and keep it safe. The sooner you get your UTR, the sooner you can focus on running your business without worrying about missed deadlines or HMRC penalties.
Frequently Asked Questions
Q: Do I need a UTR number if I’m self-employed?
Ans: Yes. If you earn untaxed income, you must register for Self Assessment and get a UTR number.
Q: Can I get a UTR number without being self-employed?
Ans: Yes, landlords, investors, and company directors often need one for their tax returns.
Q: What does a UTR number look like?
Ans: It’s a 10-digit code, often formatted as 12345 67890.
Q: Can I have more than one UTR number?
Ans: Yes, you may have a personal UTR and a separate one for your business or company.
Q: Is my UTR number the same as my NI number?
Ans: No, your National Insurance number is different and relates to your personal contributions, not tax identification.
