Sole Trader or Limited Company in 2026? A UK Guide

It's one of the most common questions people ask an accountant — and the wrong answer is genuinely expensive. Here's a plain-English guide to the choice in 2026, written from the perspective of a UK accountant who deals with it weekly.

The short answer

If your profit is under roughly £30,000 a year, sole trader is almost always the right answer. If you're consistently over £50,000 a year and intend to stay there, limited company usually wins on tax. Between those two figures, it depends.

The rest of this guide explains why.

What's the actual difference?

A sole trader is just you, trading. There's no separate legal entity — you and the business are the same thing in the eyes of the law and HMRC. You file a Self Assessment tax return once a year, pay Income Tax and Class 4 National Insurance on your profits, and you're liable for any debts personally.

A limited company is a separate legal entity. You set it up at Companies House, the company makes the money, the company pays Corporation Tax, and you (as director and usually shareholder) pay yourself a salary and/or dividends. Your personal assets are protected if things go wrong.

Tax: the bit everyone asks about

This is where the answer changes depending on your profit level.

Sole trader tax (2026): Income Tax (20%/40%/45% bands) plus Class 4 NI (around 6% on profits between £12,570 and £50,270, and 2% above). Personal allowance £12,570 still applies.

Limited company tax (2026): Corporation Tax at 19% on profits up to £50,000, sliding up to 25% on profits over £250,000. Then you pay personal tax on however you take money out — salary (PAYE) or dividends (tax-free up to £500, then 8.75% / 33.75% / 39.35%).

For most owner-managed small companies, a small salary plus dividends gives a meaningfully lower total tax bill than sole trader once profits are around £50,000+. Under £30,000 the saving is small and often wiped out by extra accountancy and admin costs.

Paperwork: the bit nobody warns you about

Sole trader: one Self Assessment tax return per year. Make Tax Digital for Income Tax is coming in stages, which adds quarterly reporting from 2026/2027 if you're over the threshold — but it's still much lighter than a limited company.

Limited company: annual statutory accounts, a Corporation Tax return (CT600), a Confirmation Statement at Companies House, a director's Self Assessment, monthly payroll if you take a salary, plus VAT if you're registered. None of it is hard with an accountant — but it's all real work.

Liability and credibility

If a sole trader business is sued or goes bust with debts, the owner is personally liable — house, savings, the lot. A limited company shields the owner (with some exceptions). For higher-risk work, this protection alone is often worth incorporating, regardless of tax.

On credibility: some clients (especially corporates) prefer dealing with a limited company. It's not a huge factor for most small businesses but worth considering if you're chasing bigger contracts.

Three quick worked examples

£30,000 profit, single trader, no big plans to grow: stay sole trader. The tax saving from incorporating is small, and the extra accountancy fees and admin usually outweigh it.

£60,000 profit, growing freelancer with plans to hire: a limited company usually saves £2,000–£4,000 a year in tax once you factor in salary/dividend mix, and the extra accountancy cost is well covered. Liability protection is a bonus.

£120,000 profit, established consultancy: almost always limited. The tax saving is significant, the credibility helps with bigger clients, and the liability protection is genuinely useful.

When (and how) to switch

If you're already sole trader and the numbers say to incorporate, you don't have to dread it. We typically:

1. Set up the limited company at Companies House (usually same-day).
2. Register it for Corporation Tax and PAYE with HMRC.
3. Open a business bank account.
4. Transfer the trade across on a chosen date (usually the start of a tax month).
5. Close down the sole trader Self Assessment registration cleanly.

The whole switch is usually done inside a week, with zero downtime in your actual trading.

The final word

There's no "best" structure in the abstract — only the right structure for your profit level, plans and risk profile. If you're not sure, run the numbers with an accountant; we offer that conversation free.

Need a hand running the numbers? Book a free consultation — we'll give you a straight answer based on your situation.