Choosing between sole trader and limited company is one of the first decisions you will make when starting a business in the UK. It affects how much tax you pay, how much paperwork you deal with, how much personal risk you carry, and, if you are planning a family, how much maternity support you can access.
There is no universally “better” option. The right choice depends on your income level, your personal circumstances, and your plans for the future. This guide breaks down the sole trader vs limited company decision with the latest 2026/27 tax figures and covers the practical considerations that generic guides often miss, including maternity pay, childcare eligibility, and pension planning.
The Basics: What Is the Difference?
A sole trader is the simplest business structure. You and the business are legally the same thing. You keep all the profits, but you are also personally liable for all debts. You pay Income Tax and National Insurance on your business profits through an annual Self Assessment tax return.
A limited company is a separate legal entity from you. The company earns the profit, pays Corporation Tax, and then you extract money from the company as a combination of salary and dividends. Your personal liability is limited to what you have invested in the company. There is more administration involved, but it offers tax planning flexibility that sole traders do not have.
Sole Trader vs Limited Company: Tax Comparison 2026/27
Tax is usually the biggest factor in the sole trader vs limited company decision. Here is how the numbers compare at different profit levels for 2026/27.
Sole trader tax: You pay Income Tax at 20% (basic rate on profits between £12,570 and £50,270), 40% (higher rate on profits between £50,271 and £125,140), or 45% (additional rate above £125,140). On top of that, you pay Class 4 National Insurance at 6% on profits above the threshold.
Limited company tax: The company pays Corporation Tax at 19% on profits up to £50,000, rising to 25% on profits above £250,000 (with marginal relief in between). You then pay yourself a small salary (typically around £9,100 to £12,570 per year to stay tax-efficient) and take the rest as dividends, which are taxed at 10.75% (basic rate), 35.75% (higher rate), or 39.35% (additional rate) above the £500 dividend allowance.
What this means in practice:
At £30,000 profit, a sole trader and limited company director take home roughly the same amount. The limited company actually costs slightly more once you factor in accountancy fees.
At £50,000 profit, the two are near parity. The limited company starts to edge ahead but the advantage is modest.
At £60,000 profit, a limited company director typically takes home around £650 more per year than a sole trader.
At £80,000 profit, the gap widens significantly. A limited company director can take home roughly £5,000 to £6,000 more per year.
At £100,000 profit, the limited company advantage grows to approximately £10,000 or more per year.
These figures are based on 2026/27 tax analysis from CalcHub assuming a single director taking an optimal salary and dividend split.
The crossover point: Below roughly £50,000 in annual profit, staying as a sole trader is usually simpler and either equivalent or slightly cheaper. Above £50,000, a limited company starts to make financial sense, and the gap grows rapidly with income.
The Hidden Cost of a Limited Company
Tax savings do not tell the whole story. Running a limited company costs more in administration.
Accountant fees: £800 to £1,500 per year for annual accounts, Corporation Tax return, payroll, and dividend paperwork. Most sole traders pay £200 to £600 per year for a Self Assessment return.
Companies House fees: £100 to register (one-off), then £50 per year for the Confirmation Statement.
Bookkeeping software: £20 to £40 per month, though some options are free.
Registered office address: £50 to £150 per year if you do not want to use your home address.
The net additional cost of running a limited company versus being a sole trader is roughly £700 to £1,200 per year. This means the tax saving needs to exceed that amount before incorporating actually puts more money in your pocket.
What Women Need to Know: Maternity Pay
This is where the sole trader vs limited company decision has a particularly significant impact for women, and it is rarely covered in standard comparison guides.
As a sole trader, you cannot claim Statutory Maternity Pay (SMP). You must claim Maternity Allowance instead, which pays a flat weekly rate from day one. There is no initial period at 90% of your earnings, unlike SMP.
As a limited company director, you are an employee of your own company. This means you can qualify for Statutory Maternity Pay, which pays 90% of your average weekly earnings for the first six weeks, then the flat rate for the remaining 33 weeks. Your company pays your SMP and then reclaims it from HMRC.
The difference can be worth thousands of pounds, especially for higher earners. If your salary is £30,000 per year, the 90% SMP rate for the first six weeks alone is roughly £519 per week, compared to the flat Maternity Allowance rate.
Important: To qualify for SMP as a director, you must have been employed by your company for at least 26 continuous weeks before the 15th week before your due date, and your average weekly PAYE earnings must meet the Lower Earnings Limit (£125 per week in 2025/26). If you are considering starting a family, planning the timing of your incorporation is essential. Switch too late and you will not meet the qualifying criteria.
Childcare and the Dividend Trap
If you have young children, the sole trader vs limited company structure also affects your eligibility for free childcare.
The Free Childcare for Working Parents scheme in England offers up to 30 hours of free childcare per week for children aged 9 months to 4 years. To qualify, each parent needs to earn at least the equivalent of 16 hours per week at national minimum wage from employment or self-employment, which works out to roughly £10,575 per year for those aged 21 and over in 2026.
Here is the catch for limited company directors: only income from employment or self-employment counts. Dividends do not count. Many directors pay themselves a minimal salary (£9,100 or so) to save on National Insurance, which means their employment income falls below the qualifying threshold.
The fix is straightforward. Set your PAYE salary to at least £10,575 per year (roughly £204 per week). The additional employer’s National Insurance cost on this salary is modest, around £700 to £800 per year, and is deductible as a business expense. That small cost unlocks childcare support worth thousands of pounds annually.
As a sole trader, your self-employment income automatically counts towards the childcare threshold, so this is not an issue.
Liability Protection
If your business runs into financial trouble or faces a legal claim, the business structure determines what is at risk.
Sole trader: You are personally liable for all business debts. If the business owes money, creditors can pursue your personal assets, including your home and savings.
Limited company: Your liability is limited to the money you have invested in the company (typically the nominal value of your shares). Your personal assets are protected, provided you have not given personal guarantees on loans or acted fraudulently.
For businesses with significant financial exposure, such as those that hold stock, take on debt, or work in sectors where legal claims are possible, limited liability is a meaningful protection. For low-risk service businesses or freelancers, the practical risk of personal liability as a sole trader is lower, though not zero.
Pensions and Long-Term Planning
Limited companies offer more tax-efficient pension options. The company can make employer pension contributions directly, which are deductible from Corporation Tax and do not attract National Insurance. A sole trader making pension contributions only gets basic-rate tax relief (with additional relief available through Self Assessment for higher-rate taxpayers, but the mechanism is less flexible).
For a director earning £80,000 in profit, employer pension contributions through the company can save several thousand pounds in combined Corporation Tax and NI compared to equivalent sole trader pension contributions.
If you are thinking about long-term financial planning, this is one of the strongest arguments for a limited company at higher income levels.
Credibility and Perception
This is subjective but worth mentioning. Some clients, particularly larger businesses and corporate clients, prefer to work with limited companies. They may view it as a signal of professionalism and stability. Some will require it for insurance or procurement reasons.
For consumer-facing businesses or freelancers working with small clients, this is less of an issue. Most customers will never know or care whether you are a sole trader or a limited company.
The Quick Decision Guide
Stay as a sole trader if:
- Your annual profit is below £40,000 to £50,000
- You want minimal admin and paperwork
- You are just starting out and testing a business idea
- You do not need limited liability protection
- You do not have plans to raise investment
Set up a limited company if:
- Your annual profit is above £50,000 (or heading there)
- You want personal liability protection
- You are planning a family and want access to Statutory Maternity Pay
- You want to make tax-efficient pension contributions
- You plan to bring on investors or co-founders
- Clients expect or require it
Consider switching from sole trader to limited company when:
- Your profits consistently exceed £50,000
- You are planning maternity leave within the next 12 to 18 months (allow time to meet the SMP qualifying criteria)
- You want to start building a pension through the company
- Your business carries increasing financial risk
You Can Always Switch Later
The most important thing to know is that this decision is not permanent. You can start as a sole trader today and incorporate as a limited company later when your income justifies it or your circumstances change. Many successful businesses start as sole traders and incorporate once they reach the £40,000 to £60,000 profit range.
Starting simple and scaling up is almost always the right approach. Do not incorporate a limited company for a business idea that has not yet proven it can generate revenue. Get trading, prove the concept, and incorporate when the numbers make it worthwhile.
Ready to set up a limited company? Read our step-by-step guide on how to register a company in the UK. Or explore grants for women in business.