How to Register as a Sole Trader | Brookwood
How to Register as a Sole Trader
If you're wondering how to register as a sole trader, the process is usually much simpler than people expect. In most cases, you can complete the registration online in less than 20 minutes. The key is understanding when registration is required, what information HMRC will ask for, and the deadlines you need to meet.
This guide explains exactly how to register as a sole trader with HMRC, who needs to register, what it costs, and what happens if you miss the relevant deadlines.
Do You Need to Register as a Sole Trader with HMRC?
If your self-employed income exceeds £1,000 in a tax year, you'll normally need to register. That applies whether you're freelancing, providing a trade or service, selling products, or running a side business that generates regular income. Occasional sales of personal possessions, such as unwanted items on eBay, generally don't count as trading.
The £1,000 figure is HMRC's trading income allowance. Stay below it, and registration usually isn't required. That said, some people register anyway, not because they have to, but because doing so builds National Insurance credits towards their State Pension. Worth knowing.
You can also be employed and self-employed at the same time. Plenty of people work under PAYE while running a sole trader business alongside it. In that situation, you register for Self Assessment and report both income streams through your annual tax return. HMRC then works out what Income Tax, Class 2 National Insurance, and Class 4 National Insurance, which are NI contributions calculated on self-employed profits above a certain threshold, you owe on the self-employed side.
One point worth being clear on: sole traders don't register with Companies House. That's for limited companies. As a sole trader, there's no legal separation between you and the business, which has implications we'll come back to.
How to Register as a Sole Trader Online with HMRC
For most people, the quickest route is through the official HMRC service on gov.uk. Search for "register as self-employed" and it'll take you where you need to go.
The process is the same across England, Scotland, Wales, and Northern Ireland. One registration, one place.
Step 1: Set Up a Government Gateway Account
You'll need a Government Gateway user ID and password to access HMRC's online services. If you don't have one, you can create it during the registration process. You'll usually need your National Insurance number to confirm your identity. If you're not sure where to find it, a payslip, P60, or old HMRC letter will have it.
Step 2: Complete the Registration Details
HMRC will ask for:
Your full name
Date of birth
National Insurance number
Home address
Telephone number
The date you started trading
A brief description of your business activities
The business start date matters more than people realise. HMRC wants the date you first began earning self-employed income, not the date you got round to registering. If those two dates are months apart, that's fine. Just make sure the start date you enter is accurate.
Step 3: Wait for Your UTR
Once you've submitted your registration, HMRC will post your Unique Taxpayer Reference (UTR) to your registered address. This 10-digit number is what you'll use for Self Assessment and all future tax correspondence. It typically arrives within 10 to 15 working days, though it can take longer during the January rush.
You don't need to wait for it before starting work. You can trade, invoice, and take on clients while HMRC processes everything.
Can You Register by Phone?
Yes, call HMRC on 0300 200 3500. Online is generally faster, but the phone option exists if you'd rather speak to someone.
What Information Do You Need to Register?
Not much. Before you start, have the following ready:
National Insurance number: essential. Payslip, P60, or any previous HMRC letter will have it.
Your trading start date: the date you first carried out paid work or generated self-employed income. Not the date you decided to formalise things.
A description of your business: nothing complicated. "Electrician", "freelance graphic designer", "dog walker", a plain description of what you do is all HMRC needs.
A business name, if you're using one: trading under your own name is perfectly acceptable. If you want a separate trading name, there are rules: you can't use "Limited", "Ltd", or "PLC" in a name that isn't actually incorporated, and the name can't infringe existing trademarks. Where a separate trading name is used, your legal name should still appear on invoices and formal documents.
Registration itself is free and doesn't require a specialist to complete on your behalf.
How Much Does It Cost to Register as a Sole Trader?
Nothing. HMRC doesn't charge a registration fee. No setup cost, no annual renewal, no admin charge.
You may come across commercial services offering to register you for between £50 and £150. They use the same HMRC process you can access directly. They're simply doing the typing for you. For most people, that's 20 minutes of their time they could spend themselves.
Other Costs Worth Planning For
Registration is free, but running a sole trader business does carry ongoing costs that are worth understanding from the start:
Accountancy fees: a straightforward sole trader Self Assessment return typically costs between £150 and £400 per year, depending on the complexity of your affairs and the firm you work with
Bookkeeping software: ranges from free tools to around £30 per month for more capable platforms
Business insurance: professional indemnity or public liability cover, depending on your trade, often runs from £5 to £30 per month
One threshold to keep an eye on: if your taxable turnover exceeds £90,000, VAT registration becomes mandatory. Most new sole traders are well below that. But it's worth knowing the number so it doesn't catch you out as things grow. You can find more about VAT registration on gov.uk if needed.
How Long Does Sole Trader Registration Take?
The online process usually takes 10 to 20 minutes. The wait after that is for your UTR, which is posted, not emailed, and typically arrives within 10 to 15 working days. In January, when the Self Assessment deadline concentrates everyone's attention at once, it can take a little longer.
If more than 15 working days pass and nothing's arrived, call HMRC on 0300 200 3500 with your registration confirmation details and ask them to look into it.
Sole Trader Registration Deadlines
HMRC's registration deadline is 5 October following the end of the tax year in which you started trading. The UK tax year runs from 6 April to 5 April. HMRC does not grant extensions on this deadline, so it is worth dealing with registration before it becomes urgent.
So: if you started freelancing in August 2025, that falls within the 2025/26 tax year, which runs from 6 April 2025 to 5 April 2026. Your registration deadline is 5 October 2026. Your first online Self Assessment return for that year would then be due by 31 January 2027, or 31 October 2026 if you're submitting a paper return.
What If You've Already Started Trading and Haven't Registered?
Register now, rather than waiting. Late registration is possible, and penalties, where they apply, are based on the amount of unpaid tax rather than a flat fee. A non-deliberate failure to notify HMRC typically attracts a penalty starting at around 30% of the unpaid tax. Deliberate concealment is treated considerably more seriously, with penalties that can reach 100% of the unpaid tax or beyond.
Unpaid Income Tax can also accrue interest from the original due date. That interest builds regardless of whether HMRC applies a penalty as well.
There is no formal amnesty period, but HMRC does recognise honest mistakes. If you cooperate, explain the position clearly, and put things right promptly, that can help reduce the penalty.
The practical advice is straightforward: if you should have registered earlier, go to HMRC before they come to you. Voluntary disclosure consistently produces a better outcome than waiting for HMRC to identify the gap independently.
Frequently Asked Questions
Can I be employed and a sole trader at the same time?
Yes. You register for Self Assessment and report your self-employed earnings alongside your employment income in your annual return. HMRC calculates the tax due on both.
Do I need a separate business bank account?
No, there's no legal requirement. That said, keeping business and personal transactions separate makes bookkeeping and Self Assessment considerably more straightforward. Most sole traders find it saves time at year-end.
What are the disadvantages of being a sole trader?
The main one is unlimited personal liability. There's no legal barrier between you and the business, which means personal assets could be at risk if the business runs into serious financial difficulty. At certain profit levels, a limited company structure also becomes more tax-efficient. If you're not sure which structure suits your situation, it's worth a conversation with an accountant before you grow much further.
Do sole traders register with Companies House?
No. Companies House is for limited companies and limited liability partnerships. Sole traders go straight to HMRC.
What is Making Tax Digital and does it affect sole traders?
Making Tax Digital (MTD) requires certain taxpayers to keep digital records and submit information to HMRC using compatible software, rather than a single annual return. From April 2026, sole traders earning more than £50,000 are now required to comply. From April 2027, the threshold drops to £30,000. If you're approaching those thresholds, it's worth getting ahead of it now rather than scrambling later.
How do sole traders register for the Construction Industry Scheme (CIS)?
Register as a sole trader and complete your Self Assessment registration first. Once that's done, you can register separately as a CIS subcontractor. Your CIS status affects whether contractors deduct tax from your payments at 20% or 30%, so it's worth getting right.
Not Sure Where You Stand?
If you've just started out, are thinking about formalising a side income, or aren't sure whether sole trader status is the right structure for where you're headed, we're happy to talk it through. Contact us here and we'll give you a clear picture of where you stand, and what, if anything, you should be doing differently.
