Starting out on your own is exciting, and a bit nerve-wracking. Between choosing a name, finding clients and sorting out your first invoice, the paperwork can feel like the last thing you want to deal with.

The good news is that registering as a sole trader is one of the easiest bits. It costs nothing, you do it online, and most people finish the application in about 10 to 15 minutes. What trips people up is not the form itself. It’s knowing what comes before it, what happens after it, and which deadlines matter.

This guide walks you through the whole process in plain English.

What Is a Sole Trader?

A sole trader is someone who runs their own business as an individual. You keep the profits after tax, and you are personally responsible for any debts the business takes on. There’s no separate legal entity between you and the business.

Plenty of everyday jobs fall under this: hairdressers, electricians, freelance designers, tutors, photographers, market sellers, Etsy shop owners and delivery drivers who work for themselves.

You don’t need to register a company, and you don’t need to pay anyone to “set you up”. If a website tries to charge you to register as a sole trader, you can safely walk away. HMRC does it for free.

Do You Actually Need to Register?

According to GOV.UK, you must register if any of these apply to you:

• You earn more than £1,000 in a tax year from self-employment (the tax year runs from 6 April to 5 April)
• You need to prove you’re self-employed, for example to claim Tax-Free Childcare
• You want to make voluntary Class 2 National Insurance payments to build up State Pension and benefit entitlement
• You need to register as a subcontractor under the Construction Industry Scheme (CIS)

That £1,000 figure is your gross income, before expenses. It’s called the trading allowance. If you earn less than that, you generally don’t need to register, though you might still choose to.

You can also be a sole trader alongside a normal job. Lots of people start on the side, then go full time later.

What You Need Before You Start

Having these ready will save you from stopping halfway through:

• Your National Insurance number. If you don’t have one, you’ll need to apply for it first
• Your full name, address and date of birth
• A passport or UK driving licence for the online identity check
• The date you started trading (or the date you plan to start)
• A short description of what you do. “Freelance photographer” or “mobile hairdresser” is perfectly fine
• Your business address. This can be your home address

How to Register as a Sole Trader: Step by Step

Step 1: Go to the official GOV.UK page

Search for “register as a sole trader GOV.UK” or go straight to gov.uk/become-sole-trader. Make sure the address ends in gov.uk. Scam sites copy HMRC’s look closely, and some of them charge fees.

Step 2: Sign in or create your HMRC online account

You’ll need a Government Gateway user ID to use HMRC’s online services. If you don’t have one, you can create it as part of the process. HMRC is gradually moving people to GOV.UK One Login, so if you’re prompted to set that up instead, simply follow the on-screen steps.

You may be asked to prove your identity using your passport or driving licence, and sometimes through the GOV.UK ID Check app on your phone.

Step 3: Register for Self Assessment as a sole trader

Registering as a sole trader means registering for Self Assessment. The online tool asks a few questions about your situation and then takes you to the right form.

One thing worth knowing: if you’ve already registered for Self Assessment for another reason, such as renting out a property, you still need to register again as a sole trader. This makes sure you’re set up for Class 2 National Insurance, which protects your State Pension record.

Step 4: Fill in your details

Enter your personal details, your business activity and your start date. Take your time here, and double-check your National Insurance number and address before you submit.

Step 5: Wait for your UTR and activation code

Once HMRC processes your application, they’ll post you a Unique Taxpayer Reference (UTR). This 10-digit number is your tax ID. It usually arrives within about 10 working days, and longer if you live abroad. Your activation code for your online Self Assessment account comes separately by post, so don’t worry if one arrives before the other.

Keep both somewhere safe. You’ll need them to file your first tax return.

Step 6: Activate your account

When the activation code arrives, sign in to your HMRC account and enter it. Your Self Assessment account is then live and ready to use.

That’s it. You’re officially a sole trader. You can start trading straight away, without waiting for your UTR to turn up.

The Deadline You Don’t Want to Miss

If you started working for yourself and haven’t registered yet, check this date carefully.

You must tell HMRC by 5 October following the end of the tax year in which you started trading. Registering late, or not at all, can lead to a penalty.

So if you started working for yourself between 6 April 2025 and 5 April 2026, your registration deadline is 5 October 2026. That’s very close, so don’t leave it.

If you’ve just started trading in the current tax year (2026/27), your deadline is 5 October 2027. Even so, registering sooner is easier. You’ll have your UTR in hand and no deadline hanging over you.

Do Sole Traders Register With Companies House?

No. This is one of the most common mix-ups online. Companies House is only for limited companies. As a sole trader, your only registration is with HMRC.

Choosing a Business Name

You can trade under your own name, like “Sarah Khan”, or pick a trading name, like “Bright Spark Electrical”. There’s no official register for sole trader names, and a trading name isn’t legally protected.

A few simple rules apply:

• Your name can’t be offensive or suggest you’re something you’re not, such as a limited company or a “bank”.
• Your name shouldn’t be too close to an existing trademark.
• On invoices and letters, your own name must appear alongside your trading name.

Before you commit, search the UK trademark register and Companies House to see whether someone is already using something similar. It takes five minutes and can save you a headache later.

What Tax Will You Pay?

As a sole trader, you’re taxed on your profit, not your turnover. Profit is what’s left after deducting allowable business expenses from your income. You pay two things on it.

Income Tax is charged at the usual rates after your personal allowance of £12,570. In England, Wales and Northern Ireland that’s 20% on the basic band, then 40% and 45% on higher bands. Scotland has its own rates.

Class 4 National Insurance for 2026/27 is 6% on profits between £12,570 and £50,270, then 2% on anything above that.

Class 2 National Insurance is no longer compulsory for most self-employed people since April 2024. If your profits are at or above the Small Profits Threshold (£7,105 for 2026/27), you’re treated as having paid it, so your State Pension year still counts. If your profits are lower, you can choose to pay it voluntarily at £3.65 a week to protect your record.

You’ll work all of this out and pay it through your yearly Self Assessment tax return.

A quick example: if your profit is £40,000 in 2026/27, your Class 4 National Insurance would be 6% of the £27,430 above £12,570, which is £1,645.80.

Making Tax Digital: Will It Affect You?

This is a big change, and it’s already started. Making Tax Digital for Income Tax began on 6 April 2026 for sole traders and landlords with qualifying income over £50,000. If you’re in scope, you must keep digital records, use HMRC-compatible software, send quarterly updates and complete a year-end declaration.

The threshold then drops in stages:

• 6 April 2026: over £50,000
• 6 April 2027: over £30,000
• 6 April 2028: over £20,000

Qualifying income is your gross income from self-employment and property before expenses, and the rules look at a previous tax year’s figures. If you earn well below these levels, you won’t be affected yet, but it’s smart to start keeping clean digital records from day one. It makes everything easier later.

Your First Month: A Simple Checklist

Registering is only the start. Here’s what to sort out next:

1. Open a separate bank account. It’s not a legal requirement for sole traders, but it makes your records far cleaner.
2. Keep every receipt and invoice. Use a spreadsheet or accounting app from the very first day.
3. Set money aside for tax. Many new sole traders put aside around 20 to 25% of what they earn so the bill isn’t a shock.
4. Check whether you need insurance. Public liability and professional indemnity are worth looking at, depending on your work.
5. Check for licences or permits. Some trades, like food businesses and security work, need extra approval.
6. Know your key dates. You’ll file your return by 31 January (online), and pay your tax bill by then too.

Sole Trader vs Limited Company: Quick Comparison

	Sole Trader	Limited Company
Setup	Free, through HMRC	Register at Companies House (fee applies)
Paperwork	Simple	More admin and filing
Liability	You’re personally liable	Usually limited to the company
Tax	Income Tax and Class 4 NI	Corporation Tax, plus tax on salary and dividends
Privacy	Fewer public records	Details are public

Most people start as a sole trader because it’s simple and cheap. As profits grow, speaking with an accountant about whether a limited company would suit you better is worthwhile.

Common Mistakes to Avoid

• Registering late. Don’t wait until the deadline.
• Paying a third party for something HMRC does for free.
• Mixing personal and business money. It makes your tax return a nightmare.
• Forgetting about National Insurance if your profits are low.
• Losing your UTR. Store it somewhere safe as soon as it arrives.

Frequently Asked Questions

How much does it cost to register as a sole trader?
Nothing. Registering with HMRC is completely free.

How long does it take to register as a sole trader?
The online application usually takes about 10 to 15 minutes. Your UTR and activation code arrive by post, typically within about 10 working days.

Can I start trading before I get my UTR?
Yes. You can start trading immediately after you apply. You only need the UTR when you file your first tax return.

Do I need to register a business name?
No. You can use your own name or a trading name, and no official registration is needed. Just make sure your own name appears on invoices and official documents.

Do sole traders need an accountant?
No, it’s not a legal requirement. Many sole traders manage on their own with simple software. An accountant becomes more useful as your income and complexity grow.

Can I be a sole trader and have a full-time job?
Yes. You’ll declare your self-employed income through Self Assessment alongside your normal job.

Can a sole trader have employees?
Yes, though you’d then need to register as an employer and run payroll.

Do sole traders pay Corporation Tax?
No. Sole traders pay Income Tax and National Insurance on their profit, not Corporation Tax.

Do I need to register for VAT?
Only if your taxable turnover goes over the VAT registration threshold, or if you choose to register voluntarily. Check the current threshold on GOV.UK.

What happens if I register late?
You may be charged a penalty. If you’ve missed a deadline, register as soon as possible.

Can I stop being a sole trader?
Yes. You can close your sole trader business by telling HMRC you’ve stopped trading, and you’ll need to file a final tax return.

Final Thoughts

Registering as a sole trader is quick, free and far less scary than it looks. Get your details together, register through GOV.UK, keep your UTR safe and build good record-keeping habits from the start. Do that, and the rest becomes much easier.

This article is for general information only and isn’t tax advice. Always check current rules on GOV.UK or speak with a qualified accountant for your own situation.