Sole Trader vs Limited Company in 2026/27: The Honest Breakdown

"Should I go limited?" is the question every self-employed person seems to arrive at eventually — usually prompted by reaching a certain income level, or by someone at a networking event telling them they're "leaving money on the table." Sometimes they're right. Often the picture is more complicated than a single cocktail-party conversation can convey.

This is the honest breakdown: what you actually pay under each structure, where the numbers tip in favour of a limited company, and the things that rarely get mentioned in these comparisons.

How sole trader tax works (quickly)

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

Income tax at 20%, 40%, or 45% depending on your profit level and the UK tax bands
Class 4 NIC at 6% on profits between £12,570 and £50,270, and 2% above £50,270

There's no corporation tax, no payroll administration, and no separate company accounts. Your total tax exposure for 2026/27 on £60,000 profit (assuming no other income) is roughly:

Income tax: £12,486
Class 4 NIC: £2,446
Total: ~£14,932 (effective rate 24.9%)

That's clear and predictable. The downside is that as profits grow — particularly above £50,270 — income tax at 40% plus Class 4 NIC (even at the reduced 2%) starts to make a meaningful dent.

How limited company tax works

A limited company is a separate legal entity. You own it; it pays corporation tax on its profits. You then extract money personally — typically through a combination of a low salary and dividends.

Corporation tax

The company pays corporation tax on its profits before any distributions. For 2026/27:

19% on profits up to £50,000
25% on profits above £250,000
A marginal relief applies between £50,000 and £250,000, creating a sliding effective rate

For most independent contractors and freelancers with modest profits, the 19% small profits rate applies. For those with higher turnover, the effective rate climbs steadily toward 25%.

The salary and dividend model

Most limited company directors pay themselves a small salary — typically set around the Secondary Threshold for employer NIC (£9,100/year), or at the Personal Allowance (£12,570/year) if they have no other NIC credits. Above that, they take dividends from company profits.

The attraction: dividends are taxed at lower rates than income tax, and the company has already paid corporation tax on the profits they come from.

Dividend tax rates for 2026/27:

First £500: tax-free (the dividend allowance)
Basic rate band: 8.75%
Higher rate band: 33.75%
Additional rate band: 39.35%

The salary is deductible as a company expense before corporation tax is calculated. Dividends are not — they come out of after-corporation-tax profits.

The side-by-side comparison

Let's put this together at a few different profit levels — using a typical structure of a £12,570 salary with the remainder taken as dividends, and 19% corporation tax throughout (small company profits):

Company profit	Sole trader total tax	Ltd company total tax	Ltd saving
£30,000	£4,532	~£4,680	−£148 (worse)
£50,000	£9,732	~£8,720	£1,012
£60,000	£14,932	~£11,460	£3,472
£80,000	£23,332	~£16,840	£6,492
£100,000	£32,486	~£22,820	£9,666

Approximate figures. Sole trader calculations assume full personal allowance, no other income. Ltd calculations assume £12,570 salary, remainder as dividends, 19% corporation tax. Use our calculators for your exact numbers.

The pattern is clear: at lower profit levels (under £40,000 or so), the limited company structure offers little to no tax advantage — and may actually be slightly worse once administration costs are factored in. Above £50,000, the saving becomes meaningful. Above £80,000, it's substantial.

What the numbers don't capture

Administration and compliance

Running a limited company involves materially more work than being a sole trader:

Annual accounts: must be prepared to a higher standard and filed with Companies House
Confirmation statement: annual filing confirming basic company details
Corporation tax return: a separate filing from your personal Self Assessment
Payroll: even a one-person payroll requires Real Time Information (RTI) submissions to HMRC
Director duties: you have legal obligations as a company director under the Companies Act 2006

Most directors use an accountant, which typically costs £1,000–£2,500/year for a simple one-person company. That fee is tax-deductible, but it represents a direct cost against the tax saving. At lower profit levels, the accountancy cost alone can wipe out the tax benefit.

Money isn't immediately yours

As a sole trader, business profit is your money as soon as it's earned. As a company director, money belongs to the company. You extract it through salary and dividends — and you can only pay a dividend when the company has sufficient distributable reserves. If the company has a cash flow issue, the money may sit in the company account even if the profits look good on paper.

The IR35 question for contractors

If you work through your limited company for clients via agencies, IR35 rules may apply. If HMRC determines that your working arrangement is "inside IR35" — meaning you're effectively an employee of the end client — you lose most of the tax benefit of the limited company structure entirely, and may owe HMRC the difference in tax and NIC as if you'd been employed. For contractors subject to IR35, the comparison changes entirely.

National Insurance on salary

The small salary model (£12,570/year) means you maintain NIC credits for the State Pension while avoiding actual NIC payments at both the primary and secondary thresholds. If you drop the salary to the Secondary Threshold (£9,100) to avoid all NIC, you lose a qualifying year for the State Pension unless you make voluntary contributions. This is a meaningful long-term cost that rarely appears in simple tax comparisons.

When a limited company makes sense

A limited company is likely worth considering if:

Your consistent net profit is reliably above £40,000–£50,000 per year
You don't need to extract all profits immediately (leaving money in the company is tax-efficient if you're prepared to defer)
You have a qualified accountant who handles the admin (so the compliance overhead is managed)
You're not subject to IR35, or you've taken proper advice on your status
You're approaching the personal allowance taper (£100,000+) where sole trader taxes become especially punishing

When sole trader is the right call

Being a sole trader is usually better if:

Your profit is under £40,000 — the tax saving doesn't justify the overhead
You're in the early stages and profit is unpredictable year to year
You want simplicity: one tax return, no payroll, no Companies House filings
You're doing contract work that could attract IR35 scrutiny
You prefer to keep your affairs private (company accounts are public)

The misconceptions worth clearing up

"I'll save loads of tax by being a limited company." At £30,000 profit: barely any. At £100,000: genuinely significant. The saving is real, but it's not dramatic until profits are high.

"Limited company protects my personal assets." True in principle — limited liability means your personal finances are separate from the company's debts. But in practice, banks often require personal guarantees for business borrowing, which limits this protection. And HMRC can pursue directors personally in cases of fraud or deliberate tax avoidance.

"I can just keep money in the company and pay less tax." Retained profits inside the company are subject to corporation tax, but extraction is ultimately taxed again as dividends or salary. The advantage is deferral and the ability to smooth income — not permanent avoidance.

"Switching is complicated." Incorporating is actually straightforward — Companies House registration takes a few minutes. The complication is winding down your sole trader affairs, transferring assets and contracts, and managing the transition tax position. It's manageable with professional help, but it's not instant.

The honest answer

There is no universal right answer. The limited company structure is a genuine tax advantage at higher profit levels, but it comes with real costs — accountancy fees, administrative overhead, reduced flexibility, and the complexity of the salary-dividend model.

For most people earning under £45,000 in profit, the math favours staying as a sole trader or making the move only when growth is clearly sustained. For those consistently above £60,000 in profit, incorporation is worth a serious look — particularly if you don't need to extract all earnings immediately.

Before making the decision, model your numbers properly. Use the Income Tax Calculator to see your current sole trader position, the Dividend Tax Calculator to understand how dividend extraction is taxed, and the Class 4 NI Calculator for the NI side. Then talk to an accountant who can model the full picture for your specific circumstances, including any IR35 exposure and whether your profit is likely to stay at that level.

The decision is about long-term structure, not a single year's numbers. Get the full picture first.