Sole Trader vs Limited Company: The Real Tax Difference in 2026

If you're self-employed in the UK, the question of whether to stay a sole trader or incorporate as a limited company comes up constantly. The honest answer is: it depends on your profit level — and the picture changed in April 2026 in ways that shift the calculation.

This guide cuts through the jargon with actual numbers so you can see where the crossover point is for your situation.

How Each Structure is Taxed

Sole Trader

As a sole trader, all your profit is personal income. You pay:

• Income Tax: 0% up to £12,570 (Personal Allowance), 20% on £12,571–£50,270, 40% on £50,271–£125,140
• Class 4 National Insurance: 6% on profits between £12,570–£50,270, then 2% above

So at the basic rate band, your marginal rate on profit is effectively 26% (20% IT + 6% NI).

Limited Company

A limited company pays Corporation Tax on its profits:

• 19% if profits are below £50,000
• 25% if profits are above £250,000
• Marginal relief applies between £50,000–£250,000

You then pay yourself through a combination of salary (low, to minimise NI — typically around £12,570) and dividends from after-tax profits. Dividends have their own tax rates above the £500 dividend allowance.

The Dividend Tax Change in April 2026

This is the key update. From 6 April 2026, dividend tax rates increased:

This makes taking profits out of a limited company more expensive than it was before — and it moves the crossover point where a company makes sense.

Where the Numbers Land in 2026/27

Here's a simplified comparison for a business owner taking all profit as income (no retained profits):

At £40,000 profit:

• Sole trader: ~£8,200 tax + NI
• Limited company director (salary + dividends): ~£8,500–£9,000 total tax
• Verdict: Sole trader wins or breaks even

At £55,000–£60,000 profit:

• This is the "sweet spot" where a limited company can pull ahead — primarily due to NI savings on the portion above £50,270
• Saving: potentially £1,500–£3,000 per year depending on structure
• Verdict: Limited company may be worthwhile, but margins are tighter after dividend tax rise

At £80,000+ profit:

• The corporation tax saving on retained profits becomes more significant
• A limited company allows you to leave money in the company and invest it, deferring personal tax
• Verdict: Limited company generally more tax-efficient, but requires accountant to optimise

The break-even point in 2026/27 sits roughly around £50,000–£55,000 for most owners who draw most of what they earn. Below that, the tax saving often doesn't justify the additional admin and accountancy costs.

Making Tax Digital Changes the Admin Equation

From 6 April 2026, sole traders and landlords with income over £50,000 must comply with Making Tax Digital (MTD) for Income Tax — keeping digital records and submitting quarterly updates to HMRC.

Limited companies are not subject to MTD for Income Tax. They file a Corporation Tax return once a year. This removes one argument for incorporating (previously, the annual Self Assessment was seen as simpler) and may push some sole traders over £50,000 to consider a company to escape the MTD burden.

Other Factors Beyond Tax

Tax isn't the only reason to incorporate:

Reasons to consider a limited company:

• Limited liability — your personal assets are protected if the business has debts
• Looks more credible to some larger clients or when bidding for contracts
• Easier to bring in partners or investors
• Can retain profits in the company and invest them before paying personal tax

Reasons to stay a sole trader:

• Simpler admin — one Self Assessment return per year (until MTD applies)
• No annual accounts, no Companies House filings, no registered office
• Lower accountancy fees — typically £300–£600/year vs £1,000–£2,000 for a company
• No formal payroll to run

Practical Checklist: Questions to Ask Before Incorporating

• Is my annual profit consistently above £50,000?
• Am I comfortable paying for a good accountant (£1,000+/year)?
• Do I need limited liability protection for my type of work?
• Am I planning to retain profits in the business rather than draw everything out?
• Will my clients or contracts require a limited company?

If you answered no to most of these, staying a sole trader likely makes sense for now.

Key Numbers

• Sole trader marginal tax rate (basic band): 26% (20% IT + 6% NI)
• Corporation Tax rate on profits under £50,000: 19%
• Dividend tax (basic rate) from April 2026: 10.75%
• Break-even profit level for incorporation: ~£50,000–£55,000
• MTD for Income Tax (sole traders): mandatory from April 2026 above £50,000
• Dividend allowance: £500/year

Sources

• Sole Trader vs Limited Company 2026 — Wright Vigar
• Sole Trader vs Limited Company Tax Comparison — Sleek UK
• When to Switch: Sole Trader vs Limited Company — AccountingStack
• Self-Employed National Insurance Rates — GOV.UK
• Corporation Tax Rates — GOV.UK
• Making Tax Digital for Income Tax — GOV.UK
• Companies Act 2006 — Legislation.gov.uk

Educational content only — not financial advice. Tax decisions depend on your individual circumstances — speak to a qualified accountant before changing your business structure.