Apply for a UTR Number Online: Everything You Need to Get Started

Apply for a UTR Number Online: Everything You Need to Get Started
Charlotte Baroukh

Charlotte Baroukh

Tax Expert @ Pie

4 min read

Updated: 20 May 2025

4 min read

Updated: 20 May 2025

All You Need to Know

A UTR number is crucial for managing your tax affairs in the UK. Getting your UTR can seem complicated but is actually straightforward when you know the steps.

Every self-employed person, business owner or taxpayer needing to complete a Self Assessment must have one. There are different application methods depending on your circumstances.

Pie.tax, the UK’s first personal tax app, makes tracking your tax obligations simple once you have your UTR. Or if you’re just here to get to grips with it all, let’s break it down!

What is a Unique Taxpayer Reference (UTR) Number?

A UTR (Unique Taxpayer Reference) is a ten-digit number issued by HMRC that identifies you within the tax system. Think of it as your tax ID card.

Your UTR stays with you for life and is completely unique to you. Unlike your National Insurance number, it’s specifically for tax purposes.

You’ll need your UTR whenever you deal with HMRC, especially when filing Self Assessment tax returns or making tax payments.

The number typically starts with a number and follows a specific format (e.g., 1234567890). Keeping it safe is just as important as protecting your bank details.

Who Needs a UTR Number?

A Unique Taxpayer Reference (UTR) number is essential for anyone who needs to file a self-assessment tax return. This includes self-employed individuals, sole traders, and limited companies.

If you earn income from various sources such as rental properties, investments, or capital gains, you will also need a UTR number to manage your tax obligations. Registering for self-assessment is a must for those who are self-employed or run a limited company, as the UTR number is crucial for handling your tax affairs efficiently.

How to Apply for a UTR Number

The most common way to get a UTR is by registering for Self Assessment through the HMRC website. You’ll need to create a Government Gateway account if you don’t have one already.

Select the registration type that matches your situation – such as ‘self-employed’, ‘not self-employed’, ‘partner’ or ‘company director’.

HMRC will ask for basic information including your name, address, National Insurance number, personal details, and date of birth. The registration process involves providing accurate information to ensure a smooth application experience.

After submitting your application, HMRC will post your UTR to your home address within 7-10 working days. They send it by post for security reasons.

When I first applied for my UTR, I was surprised it couldn’t be delivered electronically. The letter arrived within a week, though, and the process was smoother than expected.

When Do You Need to Apply?

You’ll need a UTR if you’re starting self-employment, becoming a company director, or earning additional income that needs declaring to HMRC. Having a UTR is also crucial for managing future tax returns efficiently.

Property landlords receiving rental income over the tax-free threshold also need to register for a UTR. For those starting a new business, obtaining a UTR number is a necessary step to ensure compliance with tax regulations.

If you’re entering a business partnership, both the partnership itself and each individual partner will need their own UTR numbers.

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Common Problems and Solutions

Applications are sometimes rejected if information doesn’t match HMRC records. Double-check all details, especially your National Insurance number.

If you’ve recently moved, make sure HMRC has your current address or your UTR might get lost in the post. If you have a lost UTR number, contact HMRC for assistance in retrieving it.

Non-UK residents can still apply for UTRs if they have UK income that needs declaring. The process is similar but may require additional documentation.

During busy periods (especially January), processing times can increase significantly. Apply well in advance of tax deadlines. It is important to contact HMRC directly for guidance if you face challenges during the application process.

Final Thoughts

Your UTR is a permanent identifier that stays with you throughout your tax life, so keep it safe. It is crucial for managing self assessments, ensuring that your tax filings are accurate and efficient.

Apply well in advance of tax deadlines as processing can take several weeks, especially during busy periods. The UTR number is also essential for each tax year, helping you stay compliant with HMRC regulations.

Once you have your UTR, filing your tax returns becomes much more straightforward. It’s your key to the UK tax system.

Pie.tax: Simplifying UTR Number Tax

Getting your UTR is just the beginning of your tax journey, and Pie.tax is designed to make everything else easier.


The UK’s first personal tax app, Pie.tax gives you real-time tax calculations and a simple dashboard that shows exactly where you stand with HMRC. The HMRC app is also a useful tool for managing various tax-related information.


Our app lets you store your UTR securely and uses it to match your transactions with HMRC systems, keeping everything in sync. Additionally, the HMRC app helps you manage your tax reference, making it easier to retrieve essential details about your tax accounts.


Want to see how Pie.tax can simplify your tax life once you have your UTR? Take a look at our easy-to-use app today.

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