If you’re self-employed in the UK or planning to start your own business, one of the first things you’ll need is a Unique Taxpayer Reference (UTR) number. Without it, you won’t be able to file your tax returns with HMRC or manage your self-assessment effectively. Luckily, applying online is straightforward — if you know the right steps.

In this guide, we’ll walk you through how to complete your UTR number online application quickly, explain why it’s important, and answer some common questions.

What Is a UTR Number?

A UTR number is a unique 10-digit code assigned by HM Revenue and Customs (HMRC) to individuals and businesses in the UK for tax purposes. Think of it as your personal tax ID.

You’ll need a UTR number if you:

Are self-employed.
Run your own limited company.
Work as a freelancer or contractor.
Need to complete a Self Assessment tax return.

Without a UTR, you won’t be able to file your tax returns or pay your taxes correctly, which could result in penalties.

Why You Need a UTR Number

The UTR number ensures that all your tax-related information is linked to your personal or business account with HMRC. Here’s why it’s important:

Tax Filing – It’s required when completing Self Assessment tax returns.
Business Setup – Banks and financial institutions may ask for it when you open a business account.
Avoid Penalties – Missing tax deadlines without a UTR could lead to fines.
Proof of Income – Often requested by lenders, mortgage providers, or clients for verification.

Preparing for Your UTR Number Online Application

Before you start your online application, make sure you have the following details ready:

National Insurance (NI) number
Full name and date of birth
Home address
Contact details (phone and email)
Business name (if applicable)
Type of work you do
Date you became self-employed

Having this information at hand will make your UTR number online application much quicker.

Step-by-Step: How to Complete Your UTR Number Online Application Quickly

Applying for your UTR number online is simple when you follow these steps:

1. Create a Government Gateway Account

To apply online, you’ll need a Government Gateway ID. Visit the HMRC website and create your account by providing your email and setting up login credentials.

2. Log In to HMRC Services

Once your account is active, sign in to HMRC services using your Gateway ID.

3. Register for Self Assessment

You’ll need to register for Self Assessment to receive your UTR. Complete the form by entering your personal details, National Insurance number, and information about your self-employment.

4. Submit the Online Form

Double-check the information before submitting. Incorrect details can delay the process.

5. Wait for Confirmation

Once submitted, HMRC will process your application. If everything is correct, your UTR number will be sent by post to your registered address.

How Long Does It Take to Get a UTR Number?

After completing your UTR number online application, it usually takes 10 working days to receive it by post (or up to 21 days if you’re abroad).

To avoid delays:

Make sure your details match HMRC records.
Apply well before your first tax return deadline.
Keep your address updated with HMRC.

Common Mistakes to Avoid in Your Application

Many applicants make small mistakes that slow down the process. Here’s what to watch out for:

Incorrect National Insurance number – Always double-check.
Wrong business start date – Use the date you officially began trading.
Using an outdated address – HMRC will send your UTR by post, so ensure it’s correct.
Not registering on time – You should register as soon as you become self-employed.

Can You Apply for a UTR Number by Phone or Post?

Yes, although applying online is the quickest way. If you prefer, you can:

Call HMRC’s Self Assessment helpline.
Fill out the SA1 form and send it by post.

However, these methods take longer compared to the online process.

Tips to Get Your UTR Number Faster

Apply Early – Don’t wait until tax deadlines are near.
Check Your Details – Make sure everything matches official records.
Keep an Eye on Post – Your UTR will be sent to your registered address.
Use Online Services – The online route is faster than post.

What Happens After You Receive Your UTR Number?

Once you receive your UTR, you can:

File your Self Assessment tax returns online.
Pay taxes to HMRC.
Prove your self-employment status to banks or clients.

It’s essential to keep your UTR safe. Store it securely because you’ll need it every year for tax purposes.

FAQs About UTR Number Online Application

1. How do I apply for a UTR number online?

You can apply online through the HMRC website by registering for Self Assessment.

2. How long does it take to get a UTR number?

It usually takes around 10 working days in the UK, or up to 21 days if you’re abroad.

3. Can I apply for a UTR number without being self-employed?

No. You only need a UTR if you’re self-employed, part of a partnership, or running a company.

4. Do I need a UTR number if I already pay taxes through PAYE?

No. If you’re only earning through PAYE, you don’t need a UTR unless you have additional self-employed income.

5. What if I lose my UTR number?

You can find it on previous tax returns, HMRC letters, or by logging into your HMRC account.

6. Can I speed up the UTR number application?

Unfortunately, HMRC doesn’t offer an expedited service. Applying online and ensuring your details are correct is the fastest way.

7. Is there a fee to apply for a UTR number?

No. Applying for a UTR is free. Be cautious of third-party websites that charge for this service.

Final Thoughts

Completing your UTR number online application doesn’t have to be complicated. By preparing your documents in advance, applying through HMRC’s online portal, and double-checking your details, you can get your UTR number quickly and avoid unnecessary delays.

How to Complete Your UTR Number Online Application Quickly