If you’re starting your own business, taking on freelance work, or earning money outside PAYE, setting up as a sole trader is the simplest way to become self-employed in the UK. There’s no Companies House paperwork, no complex accounts, and no need for a business address or board of directors.
However, many first-time sole traders get stuck at the same point:
“I want to register as self-employed, but I’m not sure how to get my UTR number.”
The good news?
When you register as a sole trader, you automatically start the process to receive your Unique Taxpayer Reference (UTR), the number HMRC uses to identify you for Self Assessment.
This guide breaks down the whole process clearly and naturally, showing you exactly what to do and how Tax2u can ensure nothing gets missed.
What registering as a Sole Trader actually means
Registering as a sole trader doesn’t create a company, it simply tells HMRC that:
- You’ve started earning self-employed income
- You will complete a Self Assessment tax return each year
- You will keep basic records of income and expenses
- You are responsible for paying tax and National Insurance on your profit
This registration is done through HMRC’s Self Assessment service and leads directly to the issue of your UTR.
If you prefer not to navigate HMRC’s forms, the process can also be completed through the Sole Trader Registration, which ensures everything is filled out correctly from the start.
Step 1: Gather the information HMRC will ask for
You don’t need business plans or financial projections.
To register as a sole trader, HMRC only needs:
- Your National Insurance number
- Your full name, address, and date of birth
- The date you started trading (or plan to start)
- A brief description of your business activity
- A decision on whether you want to trade under your own name or a business name
Many people worry about getting the business description wrong. The truth is, HMRC just wants a clear idea of the work you do e.g., “freelance graphic designer,” “plastering services,” or “online tutor.”
Tax2u checks and clarifies this for you during registration to avoid delays.
Step 2: Register as Self-Employed (This Is Where the UTR Comes From)
Once you have your details ready, the next step is to register for Self Assessment, this is the official process that triggers HMRC to issue your UTR.
During the registration, HMRC confirms:
- That you’re becoming a sole trader
- The date your business started
- Your personal details
- The type of work your business carries out
This is also where most mistakes happen (incorrect dates, mismatched personal details, or selecting the wrong category of self-employment).
These small errors can hold up your UTR for weeks.
Using a guided service such as the Tax2u Self-Employed Registration ensures the information you submit is accurate the first time.
Step 3: Receiving Your UTR Number From HMRC
After your registration is processed, HMRC creates your 10-digit Unique Taxpayer Reference.
This number is used for:
- Self Assessment tax returns
- Declaring income
- Claiming expenses
- Working under CIS (if you’re in the construction industry)
- Opening a business tax record
HMRC usually posts the UTR within 7–10 working days, although it can take longer during peak periods or if any information needs clarification.
Tax2u keeps track of the process and can help retrieve or reissue your UTR if you misplace it.
Step 4: Your Obligations Once You’re a Sole Trader
After you’ve registered and received your UTR, there are a few ongoing responsibilities:
1. Keep records of income and expenses
Simple summaries, invoices, receipts, and bank statements are enough.
2. Submit a Self Assessment tax return every year
This is done through HMRC and determines how much tax and National Insurance you owe.
3. Pay any tax owed by 31 January
This date applies whether your business is large or very small.
4. Claim the expenses you’re entitled to
This includes travel, equipment, software, tools, subscriptions, protective clothing, and more.
If you’re unsure what you can claim, the Tax2u Self Assessment Tax Return service calculates everything for you and makes sure you don’t overpay.
When You Should Choose Sole Trader Over a Limited Company
Most people starting out should become a sole trader because:
- It’s simpler, faster, and cheaper
- You keep full control and all the profit
- Your accounting requirements are minimal
- You can register in minutes
- You can switch to a limited company later if you grow
A limited company can make sense for higher profits or bigger clients but for 90% of people beginning their self-employment journey, sole trader status is the most sensible and flexible route.
Common Mistakes First-Time Sole Traders Make
It’s extremely common for new sole traders to:
- Register too early or too late
- Enter the wrong self-employment start date
- Choose the wrong type of business activity
- Confuse “sole trader” with “limited company”
- Forget to complete their Self Assessment after receiving their UTR
Tax2u checks your details carefully and makes sure your registration is accurate, compliant, and aligned with HMRC rules.
Why Sole Traders Choose Tax2u
Tax2u handles the entire journey for new sole traders, offering:
- Accurate registration with HMRC
- Fast UTR processing (no delays from incorrect info)
- Guidance on expenses and income
- Full support with Self Assessment filings
- Friendly help whenever you need it
It’s everything you need to start your business confidently.
FAQs
- Do I need to register as a sole trader before earning money?
No, but you must register once you’ve started trading or expect to earn more than £1,000 in a tax year. - Do I need a business bank account?
You can use your personal account, but a separate account makes bookkeeping much easier. - Can I have a full-time job and still register as a sole trader?
Yes, thousands of people run side businesses while employed.
Ready to Register as a Sole Trader and Get Your UTR?
When you’re ready, you can complete the whole process, registration and UTR setup through Tax2u.
We’ll handle the HMRC forms so you can focus on growing your business.