How to Find Your UTR Number (Even If You’ve Lost It)

A Unique Taxpayer Reference (UTR) number is a distinct identifier within the UK tax system, central for individuals and businesses engaging with HM Revenue & Customs (HMRC). This article guides you through understanding, locating, and protecting your UTR.

Understanding Your UTR

A UTR is a 10-digit number issued by HM Revenue & Customs (HMRC) to individuals and businesses. It is automatically assigned when you register for Self Assessment, set up a limited company, or form a partnership. This code identifies your tax account, allowing HMRC to track your tax records and payments. Self-employed individuals, landlords, and limited companies require a UTR to fulfill tax obligations, such as submitting tax returns.

The UTR is distinct from other identifiers like your National Insurance number, which relates to benefits and state pension contributions. Like your National Insurance number, your UTR remains consistent throughout your self-employment or business life. It is essential for engaging with HMRC.

Common Places to Find Your UTR

Your UTR can usually be found on various official documents from HMRC. Check previous Self Assessment tax returns, whether paper or online copies. The UTR often appears near the top of the form or on online submission confirmations.

Official correspondence from HMRC, such as notices to file a tax return (like SA100 or SA800), payment reminders, or statements of account, will also display your UTR. These documents are sent to your registered address. If you have set up an online Personal Tax Account or Business Tax Account through the Government Gateway, your UTR is accessible there, often displayed on the account homepage or within the Self Assessment section. For limited companies, it can also be found on company-specific HMRC documents like the CT603.

What to Do If You Cannot Find Your UTR

If you are unable to locate your UTR through existing documents or online accounts, you will need to contact HMRC to request it. Before reaching out, it is advisable to gather specific personal or business information that HMRC will require to verify your identity. This typically includes your full name, date of birth, current and previous addresses, and your National Insurance number. For businesses, you might also need your company registration number.

The primary method for requesting a lost UTR is to contact HMRC directly. You can call the Self Assessment helpline, which is designed to assist with such queries. Check the official HMRC website for the most current contact details and operating hours. HMRC will not provide your UTR over the phone for security reasons; instead, it will be sent to your registered address by post. The estimated timeframe for receiving your UTR by mail is typically within 10 to 15 working days, though it can take longer during busy periods or if you are located overseas.

Protecting Your UTR

Your UTR is a confidential identifier for your tax affairs, similar in importance to your National Insurance number. Treat it with care to prevent unauthorized access to your tax records. Avoid sharing your UTR indiscriminately or including it on public documents or general emails.

While it is generally confidential, there are specific instances where sharing your UTR is necessary, such as with your accountant or financial advisor who is authorized to manage your tax affairs with HMRC. Subcontractors registered under the Construction Industry Scheme (CIS) also need to provide their UTR to contractors for verification purposes. Keeping your UTR in a secure, private location, like with other important financial documents, is a practical step to maintain its security.