A sole trader is you trading as yourself: quick to set up, light on paperwork, but you're personally liable for the business's debts. A limited company is a separate legal entity: more admin and public filings, but your personal liability is usually limited to what you've put in. Most people starting small begin as a sole trader and incorporate once profits, risk or clients make it worth it.
The tax side is where most of the arguments start, and it's also the part that changes most often. So I'm not going to give you rates or thresholds here. Check the current figures on GOV.UK and run your own numbers with an accountant. What I can give you is the shape of each option, and the questions that decide it for most small business owners I've worked with.
Sole trader and limited company side by side
Here's the comparison I'd want in front of me before deciding. Read across each row and notice which ones you care about. That's usually most of the decision.
| Sole trader | Limited company | |
|---|---|---|
| Liability | You and the business are the same. If it owes money, you owe it personally. | The company is its own legal person. Your liability is usually limited, unless you sign a personal guarantee. |
| Setting up | Register with HMRC for Self Assessment. You can start trading the same day. | Register with Companies House, appoint at least one director, then set up Corporation Tax with HMRC. |
| Ongoing paperwork | Keep records and file a Self Assessment tax return each year. | Annual accounts, a confirmation statement, a Corporation Tax return, payroll if you take a salary, and your own Self Assessment. |
| How you pay yourself | You take money out when you like. Tax is on your profits, not on what you draw. | The money belongs to the company. Directors usually take a mix of salary and dividends. |
| Privacy | Nothing goes on a public register. | Directors, owners and the registered office address are public on Companies House. Directors can use a service address. |
| How customers see you | Fine for most consumers and small clients. | Some larger clients and suppliers prefer, or insist on, working with a company. |
| Closing down | Tell HMRC you've stopped and file your final return. | Apply to strike the company off or go through a formal liquidation, with final accounts and tax to settle. |
Five questions that decide it for most people
You don't need to weigh every row equally. In my experience, one or two of these questions settle it, and the rest are tie-breakers.
How much could go wrong, and who pays if it does?
If your work carries real risk, think big contracts, stock, staff, premises or advice clients rely on, limited liability matters. As a sole trader, a serious claim or an unpaid supplier can reach your savings and your home. A company puts a wall between the two. Be honest with yourself, though. Banks and landlords often ask small company directors for a personal guarantee, which takes you straight back over that wall. Business insurance does a lot of the protecting either way.
Are your profits big enough for the extra admin to pay its way?
Running a company can be more tax-efficient once profits reach a certain level, because of how salary, dividends and Corporation Tax work together. Where that point sits depends on the current rates and your personal situation, and it moves when the rules change. This is the question to take to an accountant with a realistic forecast. If your profits are small or patchy right now, the extra accounts and filings may cost you more in time and help than they save.
Do your clients care which one you are?
Plenty of customers won't notice. But some corporate clients and recruitment agencies will only contract with a limited company, and some sectors expect it. If the work you want comes with that condition, the decision is partly made for you. Ask a couple of your target clients before you guess.
How much admin can you face every month?
A sole trader's admin is mostly records and one tax return. A company adds payroll, dividend paperwork, separate bank accounts, director's responsibilities and deadlines from both Companies House and HMRC, with penalties for missing them. Software takes a lot of the pain away. If you're a sole trader, start with how to invoice correctly as a sole trader, and keep business money in its own account, even though the law doesn't force you to. My guide to the best business bank accounts for sole traders in the UK covers the options.
How do you feel about your details being public?
Anyone can look up a company on Companies House and see who runs it. Directors can use a service address instead of their home, and Companies House now asks directors to verify their identity. If you'd rather keep a low profile, a sole trader is the quieter option. If you're happy being visible, this one won't move you.
Switching later: from sole trader to limited company
You don't have to get this right on day one. Lots of businesses start as sole traders, test the idea, and incorporate once it's working. Here's what changes when you do:
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- You register the new company with Companies House and set up Corporation Tax with HMRC.
- You tell HMRC your sole trader business has stopped, and file a final Self Assessment return covering it.
- You open a business bank account in the company's name. Money in that account belongs to the company, not to you.
- New invoices, contracts and your website need the company's registered name and details, not just your own.
- Contracts, insurance, software subscriptions and supplier accounts may need moving into the company's name.
- You start paying yourself as a director. If you do work for your own company, read how to invoice your own company as a director.
- Equipment, stock or goodwill you move across can have tax effects, so get advice on how to transfer them.
Going the other way, from company back to sole trader, is possible too, but closing a company takes more steps. That's another reason not to rush into incorporating before you need to.
Talk to an accountant before you decide
I'll be straight with you: this isn't a choice to make from a blog post, including this one. The right answer depends on your profits, your other income, your plans for the next couple of years and rules that change with each Budget. An hour with an accountant who works with small businesses is money well spent here, and many offer a free first chat.
Go in prepared. Take a rough forecast of income and costs, a sense of what could go wrong, and your answers to the five questions above. Ask them to show you both options side by side with today's rates. Then decide. And remember you can review it again in a year.
This guide is general information, not tax or legal advice. Check the current rules and rates on GOV.UK before you act.
Frequently asked questions
Can I be a sole trader and a limited company director at the same time?
Yes. Plenty of people run a sole trader business and are a director of a separate company. Keep the two sets of records, bank accounts and invoices completely apart, and tell your accountant about both.
Is a limited company always better for tax?
No. It can be more tax-efficient at higher profit levels, but the extra admin and accountancy help cost money too. Check the current rates on GOV.UK and ask an accountant to compare both options with your real figures.
How long does it take to set up each one?
Registering as a sole trader with HMRC is quick and you can start trading straight away. Registering a limited company with Companies House is usually quick online too, but you then need to set up Corporation Tax, a bank account and payroll.
Can I use a trading name as a sole trader?
Yes. You can trade under a business name as a sole trader, as long as it doesn't include Limited or Ltd and isn't misleading or someone else's trade mark. Your own name still needs to appear on certain paperwork such as invoices.
