How to Apply for a UTR Number | Complete Guide to UTR Number

Team Nomi

Jun 24, 2026
8 minutes read

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UTR, or Unique Taxpayer Reference, is a 10 digit number issued by HM Revenue and Customs (HMRC) to identify you for tax purposes in the UK. If you’re self employed, run a business, or need to file a self-assessment tax return, you’ll need a UTR number.

In this blog, we will explain how to apply for a UTR number and discuss the various methods for applying online, by phone, and by post. You will learn who needs a UTR, when to apply, and how to find a lost number. Also, address common issues and provide tips to ensure a smooth application process.

Remember, your UTR is essential for managing your tax affairs, so it’s important to apply it correctly and keep it safe. Whether you’re a freelancer, contractor, or business owner, this will help you navigate the UTR application process with ease.

What is a UTR number?

A Unique Taxpayer Reference number (UTR) is a 10 digit code that uniquely identifies you or your business for tax purposes in the UK. Think of it as your personal tax ID, issued by HM Revenue and Customs. This number is essential for anyone who needs to file a self assessment tax return or manage their tax affairs with HMRC.

Whether you’re self employed, a company director, or have income from property or investments, you need a UTR to fulfil your tax obligations.

The UTR number always starts with a number between 1 and 9 and is followed by nine more digits. It’s important to note that your UTR is different from your National Insurance number or your company registration number. You’ll find your UTR on official HMRC documents, such as your tax return or payment reminders.

Who needs a UTR number?

Anyone who needs to file a self assessment tax return must register for UTR number. This typically includes:

• • Self employed individuals and freelancers
  • Sole traders and business partners
  • Company directors
  • Landlords with rental income
  • High-income earners (over £100,000 annually)
  • Those with significant savings or investment income
  • Individuals claiming certain tax reliefs or deductions
  • People working abroad or with foreign income
  • Ministers of religion

Even if you’re employed and pay tax through PAYE, you might need a UTR if you have additional income sources or complex tax situations.

How to Apply for a UTR Number Online

Applying for a UTR number online is the fastest and most convenient option. If you’re wondering how to apply for a UTR number online free, the process is simple and can be completed in a few steps through the official HM Revenue and Customs website.

• • Visit the HMRC website: Go to www.gov.uk/register-for-self assessment to start your application.
  • Choose the right option: Select “Register if you’re self employed or a sole trader” if applicable. If you’re setting up a partnership or company, choose the correct option to register for a UTR number.
  • Create a Government Gateway account: If you don’t already have one, create an account using your email and password. This is required to apply for UTR online.
  • Provide personal information: Enter your full name, date of birth, National Insurance number, address, and phone number. Ensure all details are correct to avoid delays.
  • Answer questions about your self employment: Provide details about your work, start date, and expected income.
  • Complete the registration: Submit your application after reviewing all information.
  • Receive confirmation: You’ll get an on-screen confirmation once your application is submitted. Save any reference numbers.
  • Wait for your UTR: HMRC will send it by post within 10 working days, up to 21 days.
  • Set up your online account: Once you receive your UTR, you can fully access your Self Assessment account.

Tips for a Smooth Online Application

• • Keep all details ready before you start
  • Use a stable internet connection
  • Double-check your information carefully
  • Use HMRC help if unsure

You can apply for a UTR number online, and there is no cost for registration.

How to Apply for a UTR Number by Phone

If you prefer assistance, you can apply for a UTR number by phone. This method is useful if you need guidance during the process.

• • Prepare your information: Keep your name, date of birth, National Insurance number, and address ready.
  • Call HMRC: Contact the Self Assessment helpline at 0300 200 3310 (Monday to Friday, 8 AM to 6 PM).
  • Follow the automated system: Select the option to register for a UTR number.
  • Speak with an advisor: Explain that you want to apply for a UTR number. They will guide you through the process.
  • Answer verification questions: Provide details about your identity and reason for registration.
  • Complete your application: The advisor will confirm submission and explain the next steps.
  • Wait for your UTR: You will receive your UTR by post within 10 working days.

Tips for Phone Application

• • Call during non-peak hours to avoid delays
  • Keep notes of reference numbers
  • Follow up if not received within 10-21 days

While this method works well, applying online is usually faster.

Apply for a UTR Number by Post

If you prefer to apply offline, you can apply for a UTR number by post.

• • Get the correct form: Use form SA1 (individual) or SA400 (partnership).
  • Fill out the form: Provide accurate personal and business details.
  • Check your information: Review everything before sending.
  • Attach documents: Include ID or proof of address if required.
  • Send your application: Use recorded delivery for safety.
  • Wait for processing: It usually takes 10-21 days.
  • Receive your UTR: HMRC will send your UTR by post.

Important Tips for post application

• • Write clearly in black ink
  • Keep a copy of your form
  • Follow up if delayed

Postal applications are slower but useful if you cannot apply for UTR online.

What information is needed to apply for a UTR number?

To apply for UTR number online free or through other methods, you’ll need to provide specific information to HMRC.

Personal details

• • Full name
  • Date of birth
  • National Insurance number
  • Current home address
  • Phone number
  • Email address

Business information

• • Business name (if applicable)
  • Business address
  • Nature of your business
  • Start date of self employment

Identification

• • Passport or driving licence

Additional details

• • Reason for registering
  • Estimated income

When Should You Register for a UTR Number?

The answer depends on your specific situation, but generally, you should apply as soon as you know you’ll need one. Here are some key scenarios:

1. Starting self-employment: Apply for UTR number online free as soon as you begin working for yourself.
2. Setting up a limited company: Register for UTR number when you incorporate your business.
3. Joining a partnership: Apply for UTR online when you become a business partner.
4. Filing a tax return: Know how to apply for UTR number and register at least 20 days before the deadline.
5. Earning rental income: Apply for UTR number online when you start receiving property income.
6. Receiving foreign income: Register for UTR number as soon as overseas income begins.
7. Selling assets (capital gains): Learn how to apply for UTR number before the relevant tax year.
8. Prefer offline help: Understand how to apply for UTR number by phone if you need assistance.

How to Find a Lost UTR Number

Lost your UTR number? Here are the easiest ways to find it:

• • Check old tax documents: Look at Self Assessment returns, HMRC letters, or payment reminders.
  • Log into your HMRC account: Your UTR is shown in your personal details.
  • Use the HMRC app: Find your UTR after logging in.
  • Contact HM Revenue and Customs: Call, use web chat, or send a secure message (you’ll need to verify your identity).
  • Check company records: If you’re a director, it may be in the company’s documents.
  • Check your accounting software: Your UTR may be saved there.

Conclusion

Understanding how to apply for UTR number is essential for managing your taxes. Whether you’re just starting out or need help with tax filing, having the right guidance makes the process simple.

Whether you need more information about UTR numbers or if you’re an accountant looking for self assessment software, we’ve got you covered. Our self assessment software streamlines tax filing with HMRC, making the process smoother for both individuals and accounting professionals.

To experience the benefits firsthand, we offer a 30-day free trial of our software. This trial period allows you to explore its features and see how it can enhance your tax filing process.

Frequently Asked Questions

1. How long does it take to get a UTR in the UK?

Ans: It usually takes 10 working days to receive your UTR by post from HM Revenue and Customs. It can take up to 21 days during busy periods.

2. Can I call HMRC to get a UTR number?

Ans: Yes, you can call HM Revenue and Customs to apply for a UTR number by phone. They will guide you and send your UTR by post.

3. Can you be self-employed without a UTR?

Ans: You can start working without a UTR, but you must register and get one to file your tax return and stay compliant with HM Revenue and Customs.

4. How much does it cost to register as self-employed with HMRC?

Ans: It is completely free to register as self-employed with HM Revenue and Customs and get a UTR number.