Which business structure saves you the most tax, protects your personal assets and positions you for growth? A side-by-side comparison using current HMRC rates.
For most UK founders, startups and businesses earning above £30,000–£35,000 in annual profit, a limited company is more tax-efficient. You pay Corporation Tax at 19–25% instead of income tax at 20–45%, avoid Class 4 NIC on profits, and can split income between a low salary and dividends for significant tax savings.
A sole trader structure is simpler and suits very small, low-risk businesses where admin simplicity matters more than tax efficiency.
The right answer depends on your profit level, growth plans, risk profile and whether you plan to raise investment. AccTek can model the comparison for your specific numbers.
| Sole Trader | Limited Company | |
|---|---|---|
| Legal status | You and the business are the same legal entity | Separate legal entity — the company exists independently |
| Liability | Unlimited — personal assets at risk | Limited to share capital — personal assets protected |
| Tax on profits | Income tax: 20–45% + Class 4 NIC: 6–2% | Corporation Tax: 19–25% |
| How you pay yourself | Drawings from the business (taxed as profit) | Salary + dividends (tax-efficient split) |
| National Insurance | Class 2 (£3.45/week) + Class 4 (6%/2%) | Employer NIC on salary only — no NIC on dividends |
| Tax-free allowance | Personal Allowance: £12,570 | Personal Allowance: £12,570 + Dividend Allowance: £500 |
| R&D tax relief | Not available | Available — up to 27% for R&D-intensive SMEs |
| Raising investment | Cannot issue shares | Issue shares, SEIS/EIS eligible |
| Credibility | Less formal | Registered company — stronger with clients and investors |
| Admin | Simpler — Self Assessment only | Annual accounts, CT return, confirmation statement, payroll |
| Public information | Minimal | Director names, registered address and accounts filed at Companies House (public) |
| Best for | Freelancers, low-risk, sub-£30k profit | Startups, founders, growth businesses, anyone raising investment |
| Tax | Rate | Applies to |
|---|---|---|
| Income tax (basic) | 20% | Profits £12,571–£50,270 |
| Income tax (higher) | 40% | Profits £50,271–£125,140 |
| Income tax (additional) | 45% | Profits over £125,140 |
| Class 2 NIC | £3.45/week | All self-employed with profits above £12,570 |
| Class 4 NIC | 6% | Profits £12,570–£50,270 |
| Class 4 NIC (upper) | 2% | Profits above £50,270 |
| Tax | Rate | Applies to |
|---|---|---|
| Corporation Tax (small profits) | 19% | Profits up to £50,000 |
| Corporation Tax (marginal) | ~26.5% effective | Profits £50,001–£250,000 |
| Corporation Tax (main) | 25% | Profits over £250,000 |
| Dividend tax (basic) | 10.75% | Dividends in basic rate band |
| Dividend tax (higher) | 35.75% | Dividends in higher rate band |
| Employer NIC | 15% | Salary above £5,000 |
At £50,000 profit, the difference is marginal. The limited company starts winning more decisively above £50,000 where the sole trader hits 40% income tax + 2% NIC while the limited company stays at 19% Corporation Tax + 10.75% dividend tax. Use our salary vs dividends calculator to model your own figures.
If you’ve decided a limited company is the better option, here’s what the process involves:
AccTek handles every step of this process as part of our startup accounting packages.
A sole trader is personally liable for all business debts and pays income tax and NIC on all profits. A limited company is a separate legal entity with limited liability, pays Corporation Tax on profits, and allows directors to pay themselves through a tax-efficient salary and dividends split.
For most UK startups and businesses earning above £30,000–£35,000 in profit, a limited company is more tax-efficient. Sole trader status suits very small, low-risk, low-profit businesses where simplicity is the priority.
The tax crossover in 2026/27 is typically around £30,000–£35,000 annual profit. Above this, the combined Corporation Tax plus dividend tax is usually less than income tax plus Class 4 NIC. The exact point depends on personal circumstances.
Income tax at 20–45% on profits after the £12,570 Personal Allowance, plus Class 2 NIC (£3.45/week) and Class 4 NIC at 6% on profits between £12,570 and £50,270, and 2% above. The effective rate rises quickly above 30%.
Yes. Form a limited company with Companies House, transfer your business activities, register for Corporation Tax with HMRC, and deregister as self-employed. An accountant ensures the transition is tax-efficient and properly handled.
More admin: annual accounts filed with Companies House, Corporation Tax returns, payroll, confirmation statements, and public financial records. Director details are publicly visible. An accountant handles most of this.
No. Sole traders have unlimited personal liability — personal assets including your home, savings and car can be used to settle business debts. A limited company protects personal assets.
No. R&D tax relief is only available to UK limited companies. If you are developing new products, software or processes, incorporating gives you access to R&D tax credits worth thousands.
No. Sole traders cannot issue shares. A limited company can issue shares and qualify for SEIS/EIS tax relief, making it essential for fundraising.
£12,570. This applies to both sole traders and limited company directors. It tapers by £1 for every £2 of income over £100,000.
Yes. AccTek models the tax comparison for your specific situation and handles the full incorporation process — Companies House registration, HMRC setup, Xero configuration and ongoing accounting support.
AccTek models the tax comparison for your specific numbers and handles the switch if a limited company is the better option.
This page is for general information only and does not constitute tax advice. All tax rates are for the 2026/27 tax year. Individual circumstances may vary — contact AccTek for personalised advice. Content by Godwin Pinto, ACA (ICAEW).
