All About UTR Numbers

Welcome to our comprehensive guide on UTR numbers. In this guide, we will delve into what UTR numbers are, their significance, and who needs them. Whether you are an individual or a business, understanding UTR numbers is essential for tax compliance, accurate filings, and effective communication with HM Revenue and Customs (HMRC). Join us as we explore the ins and outs of UTR numbers and discover their vital role in the world of taxation.

What Is a UTR Number?

A UTR number is your Unique Taxpayer Reference, which the HMRC assigns to identify you as a taxpayer. Think of it like your passport you need to access all things relating to your self-assessment tax submissions. You will receive your UTR when registering for self-assessment, and you will need it each time you submit your tax return each year. 

What Do UTR Numbers Look Like?

Everyone’s UTR number is unique to them, but what do they typically look like? A UTR number is comprised of 10 digits and may typically ens in the letter ‘K’. It is also important to note that it will never change once you have your UTR number, so you must remember it. 

UTR Number Application Explained

Who Needs a UTR Number?

Anyone who needs to submit a self-assessment tax return needs a UTR number. You can find more information in our guide to Registering and Completing Self Assessments with HMRC for a comprehensive understanding of who needs to register for self-assessments. For a brief list of who may need to register for self-assessment includes, but is not limited to:

  • Self-employed or sole traders with an income over £1,000
  • A partner in a business partnership 
  • Anyone earning above £100,000

Does Everyone Have a UTR Number?

Not everyone has a UTR number. Only those registered for self-assessment tax returns have one. 

How to Apply for a UTR Number

You can apply for a UTR number by registering for self-assessment, which you can do as soon as you start trading. These are the same process, as this is the only reason you would be given a UTR number. However, there are different ways in which you should apply for self-assessment based on your circumstances. More detailed instructions on registering for self-assessment can be found in our guide. 

For Individuals 

Individuals can apply for self-assessment and receive a UTR by completing the SA1 form for self-assessment. You will then receive your UTR number, which can be used to sign into a personal tax account. 

For Self-Employed

Suppose you are self-employed or a sole trader. In that case, you will need to register for self-assessment via your business tax account. You will also need to ensure you are registered for Class 2 National Insurance.

For Limited Companies

A limited company or limited liability partnership (LLP) must have a registered partnership. Once this is done, you will receive a UTR number for the partnership. 

Documents and Information Needed for UTR Application

When its time to register for self-assessment and apply for your UTR number, you will need to have the following information available:

  • Full name 
  • National Insurance Number 
  • Contact Number 
  • Home Address
  • Contact Email 
  • Date of Birth 
  • Date of Business Launch 
  • Business Type 
  • Business Address & Phone Number

Checking Your UTR Number

As you have the same UTR number throughout your business and life, you may want to check its accuracy, especially if it was assigned to you a few years prior. Fortunately, checking your UTR number is an option. 

Why Is It Important to Check Your UTR Number?

It is important to check your UTR number as it serves as a unique identifier for tax-related activities and ensures accurate and efficient communication with HMRC. Verifying your UTR number helps to avoid errors in tax filings, ensures timely payments, and enables effective correspondence with tax authorities, ultimately contributing to compliance and smooth financial operations.

Methods to Check Your UTR Number

If you’re unsure if your UTR number is correct, there are ways in which you can confirm it before using it to submit self-assessment tax returns. 

Online Verification

You can find your UTR number in your personal tax account or on the HMRC app, so you can cross-reference your UTR number in this way. 

Contacting HMRC

If you would prefer to speak with a representative of HMRC, you can use the self-assessment helpline to check your UTR number is correct. 

The Importance of UTR Numbers in Asset Finance

UTR numbers play a significant role in asset finance, as they serve as a reliable identifier for businesses and individuals when engaging in asset financing transactions. These unique numbers help streamline the application and approval process, ensuring accurate documentation and efficient communication between parties.

UTR Numbers as a Unique Identifier

Your UTR number is a unique identification to you as a taxpayer. By associating UTR numbers with asset finance agreements, lenders and finance providers can accurately track and manage their portfolios, establishing a clear link between the borrower and the financed assets.

UTR Numbers for Tax Compliance and Reporting

Having a UTR number allows for accurate tracking of tax-related activities, including filing tax returns, making payments, and corresponding with HMRC. It ensures that individuals and businesses meet their tax obligations promptly, minimising the risk of errors, penalties, and potential legal consequences. 

UTR Numbers for Credit and Risk Assessment

UTR numbers play a crucial role in assessing creditworthiness. Lenders can use UTR numbers to verify the borrower’s financial history and tax compliance. This information helps evaluate the risk associated with the transaction and make informed decisions regarding lending terms and conditions.

UTR Numbers for Financial Transactions and Record-Keeping

UTR numbers provide a means for monitoring assets throughout the financing period enabling an efficient record-keeping system. Lenders can easily track maintenance schedules, insurance coverage, and other important details by linking the UTR number to the asset’s records. This facilitates proactive asset management, ensuring the assets remain in good condition and meet the required standards.


To summarise, checking and safeguarding your UTR number is of utmost importance for individuals and businesses. Regularly verifying your UTR ensures its accuracy and validity, preventing any potential errors or discrepancies in tax-related activities. By securely storing and monitoring your UTR, you can maintain tax compliance, facilitate efficient communication with HMRC, and safeguard your financial and personal information.

For more queries about your UTR number, find the answers to our most frequently asked questions. Alternatively, if you have any other questions relating to finance options or you are looking to fund your business, contact us today at Portman Finance Group


News & Articles FAQs

How long does it take to get your UTR number? 

Once you have applied for self-assessment tax submission, you will receive your UTR number by post within ten working days. However, if you live abroad, this period is longer, and you can expect to wait up to 21 working days. 

Does my UTR number ever change? 

No, your UTR number will never change. This is why keeping and remembering your UTR number once you receive it is of paramount importance.

What can I do if I’ve lost my UTR number?

If you lose your UTR number, you can request it is sent to you again by calling the self-assessment helpline. However, this will be sent to you by post again and will take up to 10 working days to receive. 

Do UTR numbers expire?

No, your UTR number does not expire. It will remain the same throughout your life. So, once you have your UTR number, you can confidently save it and use it again and again without worrying about it expiring.

Is Government Gateway ID the same as UTR?

No, your Government Gateway ID is different from your UTR number. To submit a self-assessment, you will need both your Government Gateway ID and your UTR number to complete it. Your Government Gateway ID is your identification to access all HMRC services, whereas your UTR number is reserved just for access to your self-assessment tax submissions.