Sole trader vs limited company: Which structure is right for you in 2026?

If you just want the short answer: sole trader is better when profits sit below roughly £40,000–£50,000 and simplicity matters. A limited company tends to make more financial sense above that threshold – but only if you do not need to draw every penny of profit, and only if the added admin does not wipe out the saving.

The rest of this guide breaks down exactly why, with numbers, a side-by-side table, and a plain-English decision framework.

What is the difference between a sole trader and a limited company?

These are the two most common business structures in the UK, and they differ at the most fundamental level.

As a sole trader, you and your business are legally the same entity. You register with HMRC for Self Assessment, keep records of income and expenses, and pay Income Tax plus National Insurance on all profits. There is no Companies House filing. Your accounts are private. Setup is free and takes minutes.

A limited company is a separate legal entity registered at Companies House. The company pays Corporation Tax on its profits. You, as director-shareholder, pay yourself a combination of salary and dividends. Your liability is limited to the value of your shares – typically £1 on a standard formation. Annual accounts, a Confirmation Statement, and a Corporation Tax return must be filed every year.

That legal separation is the hinge on which every other difference turns.

Sole trader vs limited company: Key differences at a glance (2026/27)

Factor	Sole trader	Limited company
Legal structure	You are the business	Separate legal entity
Personal liability	Unlimited – personal assets at risk	Limited to share capital
Income tax on profits	20%, 40%, or 45% via Self Assessment	Corporation Tax at 19% or 25%, then salary and dividend tax
National Insurance	Class 4 NI at 6% (up to £50,270), 2% above	Employer + employee NI on salary; no NI on dividends
Dividend allowance	N/A	£500 per year for 2026/27
MTD for Income Tax	In scope from April 2026 (income over £50,000)	Not in scope
Setup cost	Free	£50 Companies House fee (SBX handles the rest for clients on our company package)
Annual accounts	Private, simpler	Filed publicly at Companies House
Accountancy cost (typical)	£200–£600/yr	£500–£1,500/yr
Credibility with larger clients	Can be perceived as less formal	Incorporated status carries more weight

How the tax actually works in 2026

Sole trader tax: Income tax and NI on every pound of profit

As a sole trader, HMRC taxes your entire profit as personal income in the year you earn it – regardless of how much you actually draw from the business. You pay:

• 20% Income Tax on profits between £12,571 and £50,270
• 40% on profits between £50,271 and £125,140
• 45% above £125,140
• Class 4 NI at 6% on profits between £12,570 and £50,270, dropping to 2% above that

So a sole trader earning £60,000 profit faces an effective marginal rate of 42% on every pound above £50,270 (40% Income Tax plus 2% NI). There is no timing flexibility – the tax bill lands whether you spent the money or not.

Limited company tax: Corporation Tax first, then extraction

A limited company pays Corporation Tax on its profits before you take anything personally:

• 19% on profits up to £50,000
• 25% on profits above £250,000

Marginal relief between those two thresholds tapers the effective rate up from 19% to 25%

Directors typically pay themselves a small salary – usually set just above the National Insurance threshold – and take the remainder as dividends. For 2026/27, dividends above the £500 allowance are taxed at:

• 75% (basic rate) – up from 8.75% from 6 April 2026
• 75% (higher rate) – up from 33.75%
• 35% (additional rate – unchanged)

This is the single most important change in 2026. The 2-percentage-point dividend hike from April 2026 pushed the tax break-even point higher than in previous years. The gap between structures has narrowed for business owners who draw most of their profit.

At what profit level does a limited company save tax?

This is the question most people actually want answered.

The break-even point in 2026/27 sits at roughly £50,000 of profit for most owner-directors who draw most of what they earn. Below that level, the tax difference is usually too small to outweigh the cost and additional admin of running a company.

Here is a worked comparison at three profit levels, using optimal salary/dividend mix for the limited company (these are approximate figures based on 2026/27 rates and standard assumptions – individual results vary):

Annual profit	Sole trader take-home	Limited company take-home	Approximate saving
£30,000	~£23,600	~£23,200	Sole trader wins marginally
£50,000	~£36,400	~£36,800	Very close – LC edges ahead
£80,000	~£52,700	~£56,200	LC saves ~£3,500

*Source: approximate modelling based on 2026/27 HMRC rates. These figures are illustrative. Your personal take-home depends on other income, pension contributions, and how much profit you retain. Speak to SBX for figures specific to your situation.*

The key variable is what you leave in the company. Retained profits inside a limited company are taxed at 19–25% Corporation Tax, rather than 40–45% Income Tax. For business owners who do not need to draw everything – those reinvesting or building a cash buffer – the long-term saving can be far more meaningful than the annual comparison suggests.

Personal liability: The argument people underestimate

Tax gets most of the attention, but personal liability is often the more consequential difference, especially if your work carries risk.

As a sole trader, there is no legal wall between you and your business. If a client dispute, negligence claim, or unpaid invoice goes wrong, creditors can pursue your personal assets – your savings, your car, and in serious cases, your home.

A limited company is a separate legal entity. Your liability is limited to what you invested in the company – typically £1 per share. If the company fails, creditors pursue the company’s assets, not yours personally.

That said, limited liability is not absolute for small owner-managed businesses. Banks and commercial landlords routinely require personal guarantees before extending credit or signing a lease, which removes the protection for those specific debts. Directors who engage in wrongful or fraudulent trading can also be held personally liable.

Still, for businesses in higher-risk sectors – construction, financial advice, professional services, or anyone signing significant contracts – the structural protection of a limited company is a serious reason to incorporate, independent of any tax calculation.

Should I switch from sole trader to limited company?

There is no single right time, but these are the clearest signals that incorporation is worth serious consideration:

Lean towards a limited company if:

• Profits are consistently above £40,000–£50,000 per year
• You do not need to draw all profits personally each year
• You work in a sector with meaningful liability exposure
• You want to bring in a business partner or raise investment
• Larger clients require or strongly prefer an incorporated supplier
• Your income is above £50,000 and quarterly MTD reporting adds significant pressure

Stick with sole trader if:

• Profits sit below £40,000 and you draw most of what you earn
• Simplicity and low overhead are priorities
• Your business carries minimal financial or legal risk
• You are still testing a business idea before committing to a structure

Many UK businesses start as sole traders and incorporate once profits and ambitions grow. That is sensible, not a sign of doing something wrong. The structure that suits you at £25,000 profit may not suit you at £70,000.

How SBX can help you choose the right structure

This is one of the most common conversations we have with clients at SBX, and the answer is rarely obvious without looking at the actual numbers.

We offer business structure advice as part of our service, including cash flow models that compare your projected take-home under both structures. We also handle everything that follows once you decide – from company formation and HMRC registration through to ongoing bookkeeping, payroll, and self assessment.

Our pricing is built to flex whether you are a sole trader just starting out or a growing limited company that needs full compliance support. See our pricing page for a breakdown by structure and service level.

Not sure where you stand? Book a free consultation and we will work through the numbers with you in plain English – no jargon, no pressure.

Frequently asked questions

Is a limited company always more tax efficient than a sole trader?

No. A limited company tends to save tax once profits comfortably exceed around £50,000, but below that level the difference is often marginal after the 2026 dividend rate rise – and the extra accountancy cost can outweigh any saving. The right answer depends on your profit level, how much you draw, and your individual circumstances.

What is the profit threshold for switching to a limited company?

There is no fixed number. Most accountants point to a range of £40,000–£50,000 in annual profit as the point where incorporation starts to make financial sense, assuming you draw most of your profit. If you retain profits in the business rather than drawing them, the advantage can appear at lower levels.

Do I need an accountant for a limited company?

It is not legally required, but it is strongly recommended. Filing requirements for a limited company are more complex than for a sole trader, and a good accountant typically saves more than their fee through accurate tax planning and expense claims.