UK sole trader vs limited company: Which structure for a growing team?

If you started as a sole trader and you’ve just taken on your first hire – or you’re close to it – the business structure question stops being theoretical. The sole trader vs limited company UK decision comes down to four things: tax efficiency, personal liability, client expectations, and compliance burden. What follows are the actual 2026/27 rates, a direct sole trader vs limited company UK comparison, and a framework for making the call.

What each structure actually means

A sole trader is a self-employed individual who runs a business without forming a separate legal entity. You register with HMRC once trading profits exceed £1,000 in a tax year (gov.uk), file a Self Assessment return annually, and pay income tax plus National Insurance on your profits. In sole trader vs limited company terms, you and the business are the same thing in law.

A limited company is a separate legal entity, distinct from its directors and shareholders, registered with Companies House before trading begins. The company pays corporation tax on its profits. As a director, you typically take a salary and dividends – an arrangement that can reduce overall tax liability in the sole trader vs limited company equation, but only once profits reach the point where the savings outweigh the additional running costs.

That legal distinction has direct practical consequences. When you sign a lease, take on a contract, or borrow money as a sole trader, you are personally responsible if things go wrong. When a limited company does the same, your personal exposure is capped at what you’ve put into the business. This is the central risk difference in the sole trader vs limited company choice.

For a fuller picture of the workspace costs your team may be committing to, the breakdown of office space costs in London is worth reading alongside this.

Sole trader vs limited company UK: the tax comparison (2026 figures)

For a sole trader in 2026/27, the combined effective tax rate at basic rate is approximately 26%: income tax at 20% plus Class 4 National Insurance at 6% on profits between £12,570 and £50,270 (HMRC, 2026). A limited company pays corporation tax at 19% on profits up to £50,000, with the main rate rising to 25% above £250,000. Understanding these rates is central to the sole trader vs limited company calculation.

Full 2026/27 rates:

Sole trader:

• Income tax: 20% (basic rate), 40% (higher rate), 45% (additional rate)
• Class 4 National Insurance: 6% on profits between £12,570 and £50,270
• Combined effective rate (basic band): approximately 26%

Limited company:

• Corporation tax: 19% on profits up to £50,000 (small profits rate, HMRC 2026)
• Corporation tax: 25% on profits above £250,000 (main rate)
• Marginal relief between £50,000 and £250,000 – effective rate can reach 26.5%
• Dividend tax from 6 April 2026: 10.75% basic rate, 35.75% higher rate, 39.35% additional rate
• Dividend allowance: £500 tax-free

The April 2026 dividend tax rise of 2 percentage points moved the sole trader vs limited company break-even point up. Before it, the threshold was commonly cited at £35,000 – £40,000 profit. In 2026/27 it sits closer to £50,000.

Tax at different profit levels (approximate, 2026/27):

Annual profit	Sole trader (take-home)	Limited company (take-home)	Difference
£30,000	~£24,200	~£23,000	Sole trader ahead
£50,000	~£38,400	~£38,200	Broadly equal
£70,000	~£48,600	~£51,400	Ltd ahead by ~£2,800
£100,000	~£63,500	~£68,200	Ltd ahead by ~£4,700

Figures assume optimal director salary (£12,570 with Employment Allowance, or £5,000 without), with remaining profit taken as dividends. These are estimates based on standard 2026/27 rates – individual circumstances vary.

Below £50,000 profit, any tax saving from incorporating is marginal or negative once you account for accountancy fees. A limited company typically costs £1,000 – £3,000 per year in accountancy versus £300 – £800 for a sole trader.

Key differences: a side-by-side sole trader vs limited company comparison

Factor	Sole trader	Limited company
Legal status	You and the business are the same entity	Separate legal entity
Personal liability	Unlimited – personal assets at risk	Limited to investment in the company
Tax on profits	Income tax + Class 4 NI (~26% basic rate)	Corporation tax 19-25%, then salary + dividends
Break-even (2026)	Better below ~£50,000 profit	Better above ~£50,000 profit
Setup cost	Free, immediate	£50 online via Companies House
Ongoing admin	Self Assessment once a year	Annual accounts, CT600, confirmation statement, payroll
Accountancy cost	£300 – £800/year	£1,000 – £3,000+/year
Public filing	None	Accounts filed publicly at Companies House
Credibility	Fine for most clients	Expected by many corporate and professional services clients
Adding investors	Not possible	Issue shares to investors or co-founders
Pension efficiency	Standard personal pension	Company pension contributions are a deductible business expense

When does a limited company actually make sense?

In the sole trader vs limited company context, a limited company makes sense when tax efficiency, liability risk, client requirements, or growth plans create a genuine need – not simply when profits rise. Tax is the most-discussed reason to incorporate; for a growing team, it’s often not the most pressing one.

Clients are requiring it. Many large corporates, professional services firms, and public sector bodies will not contract with a sole trader. If you’re losing work – or suspect you are – because you lack a limited company, that is a more urgent argument for incorporating than any tax calculation.

You’re taking on contracts with real downside risk. If a project could expose you to a significant financial claim, the liability protection of a limited company is worth the extra overhead. A dispute that goes badly as a sole trader can reach your personal finances directly.

You want to bring in co-founders or investors. Issuing shares, granting options, onboarding investors – a limited company handles all of this. A sole trader arrangement cannot.

You’re planning to sell. A limited company is a transferable asset. A sole trader business is much harder to package and transfer cleanly.

Profits are consistently above £50,000. At this level in the sole trader vs limited company comparison, salary plus dividends starts to outweigh the accountancy and compliance costs.

If none of this applies yet, staying as a sole trader is sensible. Incorporation should follow a genuine operational or financial need, not a perceived milestone.

The team growth question: does structure follow headcount?

Adding employees does not require incorporation. Sole traders can employ staff – you register as an employer with HMRC, operate PAYE, and pay employer National Insurance. The sole trader vs limited company structure choice does not change just because you have people working for you.

What does change as the team grows: personal liability exposure increases, because more employees means more contracts and more scope for things to go wrong. Client expectations also shift – a team of five or six pitching for mid-market work will encounter clients who require a registered company, particularly in London’s professional services, finance, and tech sectors. Office commitments become more relevant too. When you take on a private office or serviced space, providers typically run a company credit check. A newly registered limited company with no trading history may need a larger deposit. Established sole traders sometimes find flex space easier to secure initially, though a limited company offers more options as commitments lengthen.

If you’re at the point where a private office or serviced space makes sense, it’s worth reading about what growing teams need to know before taking on private office space in London – the cost and commitment picture connects directly to your structure decision.

What about Making Tax Digital?

Making Tax Digital for Income Tax Self Assessment (MTD ITSA) is a mandatory digital reporting regime that requires qualifying sole traders to submit quarterly income and expense updates to HMRC, in addition to their annual tax return. From April 2026, the threshold is trading profits above £50,000 (HMRC, 2026). It drops to £30,000 in April 2027, and to £20,000 in April 2028.

Two things follow from this. It adds substantial admin burden – quarterly submissions require MTD-compatible software and much more regular bookkeeping. It also closes the simplicity gap in the sole trader vs limited company decision.

For a sole trader above £50,000 in 2026, the admin difference in the sole trader vs limited company decision has never been narrower. The tax difference at this profit level is also narrow. If that describes your position and you haven’t reviewed your structure recently, the MTD changes are a reasonable prompt to do so.

HMRC’s guidance on setting up as a sole trader and forming a limited company sets out the current obligations in full.

The office angle

Once the sole trader vs limited company question is settled, workspace is the next practical question. A limited company gives you cleaner options for longer-term commitments – from a coworking membership billed to the company through to a serviced office on a rolling term. Understanding what a serviced office actually involves is useful context before you start comparing options.

When your team is ready to look at London workspace, you can rel=”noopener”>browse coworking spaces in London on myhqspaces.com – flexible options with transparent pricing across the city.

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