How to Register as a Sole Trader in the UK

By UKListingz Editorial Team Published 6 November 2026 Updated 6 November 2026 12 min read

To register as a sole trader in the UK, you tell HMRC that you are self-employed, usually through GOV.UK, and then you file a Self Assessment tax return every year. A sole trader is one person running a business under their own name. You keep the profits, pay tax on them and are personally responsible for business debts.

Key takeaways

• You register with HMRC for Self Assessment, and a new sole trader must register by 5 October after the end of the tax year in which they started trading.
• The tax year runs from 6 April to 5 April, and the online Self Assessment deadline is 31 January after the end of that tax year.
• There is no legal separation between you and your business, so business debts can reach your personal assets.
• Keep records of every sale and cost from the first day, because they support your tax return and any future digital record requirements.
• The trading allowance is £1,000 of trading income, but it is not a blanket exemption, so check GOV.UK before relying on it.
• Decide on your business name, bank account and insurance before you take your first paying customer.

What is a sole trader?

A sole trader is an individual who runs a business without setting up a company. You and the business are treated as one person for legal and tax purposes, so the income it earns counts as your personal income. Many self-employed tradespeople, freelancers, consultants and market traders work this way because it is the simplest structure to start with.

Being self-employed is different from being an employee. If you take on the risk of the work, choose how and when you do it, and invoice clients for your own work, HMRC will usually treat you as self-employed. If you work under a contract of employment, your employer normally runs your tax through PAYE instead. Some people do both at once, such as keeping a part-time job while building a side business, and they must report each income stream correctly.

HMRC looks at the actual arrangement rather than the label on it. Calling yourself a contractor or consultant does not settle the question. If you are unsure which category you fall into, read the GOV.UK guidance on employment status or ask an accountant before you start invoicing.

The lack of separation matters most when things go wrong. If a supplier is not paid or a customer makes a claim, the creditor can pursue you as the individual, and that can reach personal savings or other assets, depending on the debt and the outcome. The structure is simple, but simplicity comes with that trade-off, and it is worth understanding before you sign your first contract.

How do you register as a sole trader with HMRC?

You register for Self Assessment with HMRC, which gives you a Unique Taxpayer Reference (UTR) and lets you file your tax return. Most people do this online through GOV.UK, and the process is designed for one person with their own details to hand. Work through the steps in order so nothing is missed.

1. Gather your personal details, including your full name, date of birth, National Insurance number, home address and a phone number and email address you can access.
2. Write a short description of the work you will do, because HMRC asks what your trade involves.
3. Go to the GOV.UK page for registering for Self Assessment and follow the sole trader route, which asks for the date you started trading.
4. Note your UTR when it is given to you and keep it somewhere safe, since you will need it for every return and payment.
5. Expect HMRC to post an activation code or letter if it cannot confirm your details online, and allow time for the post before your first filing date.
6. Set up your records and bank account before you send your first invoice, so every sale is captured from the start.

The most common mistake is registering late. You can still register after you have started trading, but the later you do it, the more catch-up work you face and the greater the risk of penalties. If you are unsure whether you have a registration duty, ask HMRC directly or speak to a qualified accountant rather than guessing.

Registration is handled by HMRC for the whole of the UK, but the Income Tax bands in Scotland are different from those in England, Wales and Northern Ireland. If you live in Scotland, check the Scottish bands on GOV.UK when you work out what you owe, because the same profit can produce a different bill.

What deadlines do you need to know?

There are three dates that matter most: the registration deadline, the end of the tax year and the online filing deadline. Missing them can lead to penalties and interest, so add them to your calendar as soon as you register.

Here is how the dates work in practice. If you start trading in the tax year that runs from 6 April 2026 to 5 April 2027, you must register by 5 October 2027. Your first online return for that year is due by 31 January 2028. Write the dates down against the year you started, because the clock runs from the end of that tax year, not from the day you first earned money.

Can you trade under a business name, and do you need a bank account?

As a sole trader you can trade under your own name or under a business name, such as a trading name that describes what you do. You do not register a sole trader business name with Companies House in the way a limited company does, but a few rules still apply.

Check that the name is not already in use or trade marked, and check that it does not include words that are restricted or need permission. If you trade under a business name, you must show your own name and an address on business letters, invoices and order forms, and on your website if you have one. A quick search of existing trade marks before you print signs or buy a domain can save you a costly change later.

A separate bank account is not always a legal requirement for a sole trader, but it is one of the most useful habits you can build. Keeping business money apart from personal spending makes your records easier to follow and your tax return simpler. Ask your bank which account suits a small business, and avoid paying for features you will not use.

Insurance deserves thought at this stage too. Public liability insurance is usually not a legal requirement for a sole trader, but many customers and clients ask for it. If you employ anyone, employers' liability insurance becomes a legal requirement, so read our guide to business insurance before you take on staff, and compare quotes through an insurance broker if your work carries higher risk.

What records should you keep, and which expenses can you claim?

You must keep records of every sale and every business cost, along with the evidence for each. HMRC expects you to be able to show how your figures were worked out, so receipts and invoice copies are part of the job rather than an extra.

A workable set of records usually includes the following:

• Copies of every invoice you issue, with the date, customer name and amount
• Receipts or statements for every business expense, including fuel, equipment, software and subscriptions
• Bank statements for your business account, or a clear record of business transactions if you pay them from a personal account
• Mileage records for business journeys, with the date, route and purpose, if you claim mileage
• Notes on any part of a purchase that is personal, so you claim only the business share
• Your records for the full period the rules require, which GOV.UK explains

HMRC generally allows costs that are incurred wholly and exclusively for the purposes of your business. A phone or van that you use partly for personal journeys is a common example where you need to apportion the cost and keep a note of how you did it. When in doubt, keep the receipt and ask.

Common mistakes include paying business costs from a personal card with no note, recording cash takings in a notebook without dates, and leaving invoices unissued until the year ends. Each is easy to avoid from the start and slow to reconstruct later, when you are trying to remember what a payment was for.

The trading allowance is £1,000 of trading income. If you use it, you cannot also deduct your actual expenses for the same income, so compare both routes before you decide. The allowance can also change whether you need to register or file, so check the current GOV.UK guidance before relying on it. Keeping full records from the start gives you the option to choose whichever route produces the better result.

How does Making Tax Digital affect new sole traders?

Making Tax Digital for Income Tax is a government scheme that will require sole traders and landlords above certain income levels to keep digital records and send quarterly updates through compatible software. It is phased in by income, so a new sole trader may not be in scope on day one, but the direction of travel is clear.

The thresholds are based on qualifying income, which is gross income from self-employment and property rather than profit. The phases are from April 2026 for qualifying income over £50,000, from April 2027 over £30,000, and from April 2028 over £20,000. Because the test uses gross income, a business with high takings and high costs can be in scope even when its profit is modest.

Even if you are not in scope yet, using digital records from the start is sensible. Choosing software early means your bookkeeping habits match what the scheme will require, and you avoid a rushed switch later. Our Making Tax Digital guide covers the quarterly process in more detail, and you should check GOV.UK for the current position before you act.

When should you bring in an accountant?

You can file your own Self Assessment return, and many sole traders do. An accountant becomes more valuable as your income grows, when you take on staff, when you register for VAT, or when you start thinking about a limited company.

When you compare accountants, ask a few specific questions:

1. Do you charge a fixed fee for the return, an hourly rate or a package that includes bookkeeping?
2. What is included, such as software set-up, quarterly updates, reminders and help with a tax enquiry?
3. Which professional body are you a member of, and how can I check your membership?
4. Who will I speak to day to day, and how quickly do you reply to emails?
5. How do you handle my records, and what happens to them if I leave?

A good answer is specific and written down. If an accountant cannot explain their fees clearly or promises a particular tax result, look elsewhere. Browsing accountants by town is a practical way to shortlist firms, and it is worth comparing at least two before you commit.

What should you do next?

Once you have your UTR and your deadlines are in your calendar, work through a short list of tasks before you start invoicing. Set up a simple record-keeping system, open or designate a business bank account, check your insurance and confirm what your customers will expect from invoices.

If you still need to find services to support the business, you can browse all categories on UKListingz. Listings show the details each business supplies, but UKListingz does not verify qualifications, insurance or accreditation, so check those points yourself before you hire anyone.

If you are still deciding whether to stay a sole trader in the long run, read our comparison of sole trader and limited company status before you commit to a structure. Your choice also affects how you handle VAT, so the VAT registration guide is worth a look once your turnover grows.

Frequently asked questions

Do I have to register as a sole trader if I only earn a small amount?

You may not need to report very small amounts, because the trading allowance covers the first £1,000 of trading income. However, the rules depend on your total income, any expenses you want to claim and any other income you receive. Check GOV.UK before assuming you are exempt. Keeping records from your first sale is worthwhile whatever the amount, because it makes any later registration much simpler.

Can I register as a sole trader while I have a full-time job?

Yes, many people do. Your employer will keep deducting tax through PAYE on your employment income, and your self-employed profits go on your Self Assessment return. Keep the two income streams separate in your records. If you are unsure whether the work you do for an employer counts as employment or self-employment, ask HMRC or an accountant before you start invoicing.

What happens if I miss the registration deadline?

HMRC can charge penalties for late registration and late returns, and interest can build up on tax paid late. The current penalty rules are set out on GOV.UK. If you realise you have missed a date, register as soon as you can, file any outstanding returns and speak to an accountant about the best way to deal with the position. Acting early usually keeps the problem smaller.

Do I need a separate bank account for my sole trader business?

The law does not usually require a separate account for a sole trader, but having one is strongly sensible. Mixing business and personal money makes it hard to see what the business earned and spent, and it slows down your tax return. Choose an account that suits a small business, and check that you can export transactions in a format your bookkeeping software accepts.

Can I change from sole trader to a limited company later?

Yes. Many sole traders later form a limited company once profits grow or they want more separation between themselves and the business. A company is a separate legal entity, so it needs its own registration with Companies House, its own accounts and tax returns, and a plan for moving contracts and assets across. Get advice before you switch, because the timing can affect your tax position.

Do sole traders have to register for VAT?

Only if your taxable turnover goes over the VAT threshold. The threshold is £90,000 over a rolling 12-month period, and you can register voluntarily below it if that suits your customers or costs. VAT brings invoicing rules and regular returns, so read the VAT guidance and check the threshold page on GOV.UK before you decide.

Sources and further reading

• Set up as a sole trader (GOV.UK) – the official step-by-step guidance for new sole traders.
• Register for Self Assessment (GOV.UK) – how to register with HMRC and get your UTR.
• Making Tax Digital (GOV.UK) – the current position on digital records and quarterly updates.
• VAT registration thresholds (GOV.UK) – the current compulsory registration threshold.

This article is general information, not legal, financial or professional advice. Rules and prices change, so check the official sources above before you act.

Written by UKListingz Editorial Team. How we write and check our articles.