In the UK, many small businesses choose between a sole trader setup and a limited company. They have different tax treatments, different legal protection, and different administrative requirements. Choosing the wrong one 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 typically offers more tax efficiency once profits exceed around £30,000-£40,000 a year, and it limits your personal liability for business debts. The right choice depends on your income level, how much personal risk you carry, and your long-term plans.
Most people starting out begin as sole traders. It’s the easiest way to start. 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 become the better fit. It has its own legal identity. Your personal assets are separate from the business. And there’s more flexibility in how you extract income.
Who pays less tax: sole trader or limited company?
A limited company usually pays less tax at higher profit levels. Sole traders pay Income Tax and National Insurance on all profits above the personal allowance. Limited company directors pay Corporation Tax on company profits (see current Corporation Tax rates at gov.uk), and typically pay themselves via a combination of salary and dividends, which reduces overall tax and National Insurance.
Here’s the rough comparison for a sole trader vs 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, it has been frozen in recent years). National Insurance Class 4 applies on profits above that same threshold. Total tax and NI typically comes to around £18,000 to £20,000 at that income level, though rates and thresholds change, 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 low salary (typically set at the NI primary threshold) plus dividends. Dividends are taxed at lower rates than employment income. Total tax on the same £60,000 profit is typically lower by several thousand pounds.
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 considering the switch at around £30,000 to £40,000 in annual profit. Below that level, the tax saving typically doesn’t outweigh the additional accountancy costs and administrative burden. Above that level, the saving from Corporation Tax and dividend extraction usually makes the switch worthwhile.
Other factors that push the decision earlier:
Liability. If your work carries risk, contracts, professional services, trade, limited liability protects your personal assets if the business runs into trouble.
Client requirements. Some clients, especially larger companies and agencies, insist on working with limited companies. If you’re a contractor, note that operating through a limited company also brings IR35 into play. Our guide on IR35 rules for contractors explains what that means for you.
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 view a limited company as more established than a sole trader setup.
What are the disadvantages of setting up a limited company?
A limited company involves more paperwork: annual accounts, a Confirmation Statement to Companies House, Corporation Tax returns, PAYE if you pay yourself a salary. You have legal duties as a director under the Companies Act. And your accounts are publicly available at Companies House. These are real obligations, not difficult, but they require either your time or an accountant’s.
The costs of running a limited company are higher than a sole trader setup. Accountancy fees for a limited company are typically higher, because the work involved is more complex. If you’re making low profits, those fees can cancel out the tax saving.
Limited companies also face more rules around expenses. What directors can claim through the company is well-defined by HMRC. Getting it wrong leads to tax charges.
How do you set up as a sole trader?
Setting up as a sole trader is straightforward. You register as a sole trader with HMRC by 5 October following the end of the tax year in which you started trading. You keep records of your income and expenses. You file a tax return each January.
If your turnover exceeds the VAT registration threshold (currently £90,000), you must register for VAT regardless of your legal structure.
How do you register a limited company?
You register a limited company with Companies House. You’ll need a company name, a registered address in the UK, at least one director, details of shareholders, and a Memorandum and Articles of Association.
Most registrations go through in 24 hours via the online system. After incorporation, you’ll 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’s no fixed deadline. The switch involves closing your sole trader registration with HMRC, incorporating the company, and potentially transferring business assets. You’ll need to update any supplier contracts, professional memberships, and bank accounts.
There are tax implications to the transfer of assets, which vary depending 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.