Sole Trader vs Limited Company in the UK: Which is Right for You? (2026)
Choosing the right business structure is one of the most important financial decisions you will make. The good news is that you can change structure as your business grows — and most people start as a sole trader before incorporating. Here is how the two options compare in 2026.
Tax at different profit levels
The tax saving from incorporating a limited company grows as profits rise. At £30,000 profit, a sole trader pays approximately £6,000 in income tax and National Insurance, while a director-shareholder of a limited company taking salary plus dividends pays around £5,500 — a modest saving of around £500.
At £60,000 profit, the gap widens significantly. A sole trader pays around £18,000 in combined income tax and Class 4 NI. The same profit extracted efficiently through a limited company as a minimum salary plus dividends costs around £13,000 in total tax — a saving of approximately £5,000.
At £100,000 profit, the difference becomes very substantial. A sole trader will pay approximately £37,000 in combined taxes, while a well-structured limited company arrangement keeps the bill to around £26,000, saving roughly £11,000 per year.
Liability
As a sole trader, you and your business are legally the same entity. All business debts are your personal debts. If the business is sued, your personal assets — including your home — can be at risk.
As a limited company director, the company is a separate legal entity. Your personal liability is generally limited to the amount you have invested in the company. This protection is not absolute — you can lose it through personal guarantees, fraudulent trading, or director misconduct — but it provides meaningful protection in most ordinary business failures.
Setup and ongoing costs
Registering as a sole trader is free and involves a straightforward HMRC notification. You file one Self Assessment return each year, which a basic accountant will charge £200–£400 to prepare.
Incorporating a limited company costs £12 through Companies House (online, same day). However, the ongoing admin is substantially heavier: you must file an annual Confirmation Statement (£34), file annual company accounts, submit a Corporation Tax return (CT600), run payroll for your salary, and prepare dividend paperwork. Expect to pay an accountant £800–£2,000 per year.
When to consider converting
The conventional advice is to consider incorporation when your annual profits consistently exceed £40,000–£50,000. Below this level the tax saving may not justify the extra compliance cost and complexity.
Other triggers include: taking on employees, wanting liability protection, bidding for contracts that require a limited company, or bringing in investors or business partners.
IR35 considerations
If you work through a limited company and most of your income comes from a single client, HMRC may argue that you are effectively employed by that client (the IR35 rules). If caught by IR35, the tax advantages of the limited company structure are largely eliminated. Get professional advice before incorporating if this applies to your situation.
Practical next step
If you decide to incorporate, use a reputable company formation agent — most charge £30–£60 and set up your company correctly with the right share structure and officer details. Companies House direct is cheapest at £12, but offers no guidance.
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