In the UK, two of the most common business structures are the sole trader and the limited company. They are taxed differently, offer different legal protection, and come with different admin. Pick the wrong one, and it can cost you money or leave you personally exposed to business debts.
Disclaimer: This article is for general information only. It doesn’t constitute tax or legal advice. Speak to a qualified accountant before deciding your business structure.
Is it better to be a sole trader or limited company in the UK?
Neither structure is always better. A sole trader setup is simpler and cheaper to run. A limited company often becomes more tax-efficient once profits reach about £30,000 to £40,000 a year, and it gives you more protection from business debts. The right choice depends on your income, how much risk you carry, and your long-term plans.
Most people start out as sole traders. It is the easiest way to begin. You register with HMRC for Self Assessment, keep your records, and pay Income Tax on your profits through your annual return.
As income grows, a limited company can start to make more sense. It has its own legal identity. Your personal assets stay separate from the business. You also have more flexibility in how you take money out.
Who pays less tax: sole trader or limited company?
A limited company usually pays less tax once profits are higher. Sole traders pay Income Tax and National Insurance on all profits above the personal allowance. Limited company directors pay Corporation Tax on company profits (25% for profits above £250,000, 19% for profits at or below £50,000), and usually pay themselves with a mix of salary and dividends, which reduces overall tax and National Insurance.
Here is the rough comparison for a sole trader and a limited company director taking £60,000 profit:
As a sole trader: You pay Income Tax on profits above your personal allowance. Check the current figure at gov.uk, as it has been frozen in recent years. Class 4 National Insurance also applies on profits above that same threshold. Total tax and NI usually comes to around £18,000 to £20,000 at that income level, but rates and thresholds change, so verify the current year’s figures with HMRC.
As a limited company director (taking salary + dividends): You pay Corporation Tax on company profits, then take a small salary, usually set at the NI primary threshold, plus dividends. Dividends are taxed at lower rates than employment income. On the same £60,000 profit, total tax is usually several thousand pounds lower.
The saving varies depending on profit level, your personal circumstances, and accountant fees. At lower profits, say under £25,000, the difference narrows and may not justify the extra admin.
At what point should a sole trader become a limited company?
Most accountants suggest looking at the switch at around £30,000 to £40,000 in annual profit. Below that level, the tax saving often does not cover the extra accountancy cost and admin. Above that level, the savings from Corporation Tax and dividend extraction usually make the move worthwhile.
Other factors that can push the decision earlier:
Liability. If your work carries risk, such as contracts, professional services, or trade work, limited liability helps protect your personal assets if the business runs into trouble.
Client requirements. Some clients, especially larger companies and agencies, insist on working with limited companies.
Growth. If you plan to take on employees, bring in partners, or seek investment, a limited company is the normal structure.
Credibility. Some businesses and customers see a limited company as more established than a sole trader setup.
What are the disadvantages of setting up a limited company?
A limited company brings more paperwork: annual accounts, a Confirmation Statement to Companies House, Corporation Tax returns, and PAYE if you pay yourself a salary. You also have legal duties as a director under the Companies Act. Your accounts are public at Companies House. None of this is difficult, but it does take time, or an accountant.
The running costs are also higher. Limited company accountancy fees are usually higher because the work is more complex. If profits are low, those fees can wipe out the tax saving.
Limited companies also have stricter rules around expenses. HMRC sets out what directors can claim through the company. Get it wrong, and you can trigger tax charges.
How do you set up as a sole trader?
Setting up as a sole trader is straightforward. Register for Self Assessment with HMRC by 5 October after the end of the tax year in which you started trading. Keep records of your income and expenses. File your tax return each January.
If your turnover goes above the VAT registration threshold, currently £90,000, you must register for VAT whatever your legal structure.
How do you register a limited company?
You register a limited company with Companies House. You will need a company name, a registered address in the UK, at least one director, shareholder details, and a Memorandum and Articles of Association.
Most registrations go through in 24 hours via the online system. After incorporation, you will need to:
- Register with HMRC for Corporation Tax within 3 months of starting to trade
- Set up PAYE if you’re paying yourself a salary
- Register for VAT if your turnover exceeds the threshold
An accountant experienced in limited company formation can handle registration and set up your payroll, company bank account, and accounting software from the start.
Can you switch from sole trader to limited company later?
Yes. Many people start as sole traders and incorporate later. There is no fixed deadline. The switch involves closing your sole trader registration with HMRC, incorporating the company, and potentially transferring business assets. You will also need to update supplier contracts, professional memberships, and bank accounts.
There can be tax implications when you transfer assets, and they depend on the assets involved. Get advice before you switch.
DASA can help you decide and set up
If you’re unsure which structure suits your situation, we’ll look at your income level, risk exposure, and growth plans, and give you a clear recommendation.
Get a quote and we’ll send you our current pricing: DASA’s company registration service.