Sole Trader vs Limited Company for Tradespeople UK 2026: When to Switch and What It Saves
Updated: 23 June 2026
Most tradespeople start as sole traders — it is simpler, cheaper and has less admin. But as your income grows, the tax gap between sole trader and limited company widens significantly. At £60,000 net profit, the difference in tax paid can exceed £8,000 per year. This guide explains when it makes sense to switch, what the real advantages and disadvantages are, and how the decision affects CIS, VAT and insurance.
There is no single right answer — the best structure depends on your profit level, your appetite for admin, whether you do subcontract work under CIS, and whether liability protection matters for the type of work you carry out. Understanding all these factors together is what makes the decision.
Sole Trader — How Tax Works
As a sole trader, all your profits are treated as personal income. You pay Income Tax and National Insurance directly on everything you earn above the personal allowance. There is no separation between you and the business — HMRC taxes you as an individual.
- Income Tax at 20% on profits from £12,571 to £50,270 (basic rate)
- Income Tax at 40% on profits above £50,270 (higher rate)
- Class 4 National Insurance at 9% on profits between £12,570 and £50,270
- Class 4 NI at 2% on profits above £50,270
- Class 2 NI at £3.45 per week if profits exceed £12,570
Combined, this means a sole trader earning £40,000 net profit pays roughly 27–29% of that in tax and NI. On earnings above £50,270, the effective marginal rate jumps to around 47–49% — meaning nearly half of every pound over that threshold goes to HMRC.
Limited Company — How Tax Works
A limited company is a separate legal entity. The company pays Corporation Tax on its profits (currently 19% for profits under £50,000, graduating to 25% above £250,000). You then extract money from the company as a combination of salary and dividends, each taxed differently.
The most common approach is to pay yourself a salary up to the personal allowance (£12,570) — which is free of Income Tax and keeps NI obligations minimal — and take the rest as dividends. Dividends are taxed at 8.75% up to the basic rate threshold and 33.75% above it. There is also a £500 dividend allowance each year.
- Corporation Tax: 19% on profits up to £50,000
- Salary (to personal allowance): effectively 0% Income Tax, minimal NI
- Dividends: 8.75% (basic rate), 33.75% (higher rate)
The result: a limited company director earning the equivalent of £40,000 net profit pays approximately 20–24% overall. At £70,000 profit, the effective rate is around 32–37% — compared to 42%+ as a sole trader. The tax saving at £50,000 net profit is typically £5,000–8,000 per year.
Comparison Table
| Factor | Sole Trader | Limited Company |
|---|---|---|
| Setup | Instant | 1–2 days via Companies House |
| Tax at £40k profit | ~28% | ~22% |
| Tax at £70k profit | ~42% | ~32% |
| Liability | Personal | Protected |
| Annual accounts | Self-assessment only | Companies House + corporation tax |
| Accountancy cost | £300–600/yr | £800–1,500/yr |
| VAT | Same rules apply | Same rules apply |
| CIS | 20% deduction | 20% deduction (corporation tax offset) |
The Liability Argument
Tax is the most obvious reason to go limited, but liability protection is arguably more important for tradespeople doing high-value work. As a sole trader, there is no legal separation between you and your business. If a customer makes a claim against your work — a structural failure, a fire caused by a wiring fault, significant property damage during a renovation — and that claim exceeds your public liability insurance payout, your personal assets are at risk. Your home, your savings, your vehicle.
A limited company creates a distinct legal entity. In most circumstances, your personal liability is limited to the value of your shares (typically £1). Creditors and claimants can pursue the company but cannot reach your personal assets unless you have personally guaranteed debts or acted fraudulently.
For electricians, gas engineers, structural builders, roofers and anyone doing work where a failure could cause serious injury or significant financial loss, this separation has real value — even if your public liability policy covers most scenarios. It is a backstop, and one that costs nothing extra once the company is set up.
When NOT to Go Limited
A limited company is not always the right move. In the following situations, staying as a sole trader is likely the better choice:
- Your net profit is below £35,000 — the accountancy fees and admin time will likely exceed the tax saving at this level.
- You have significant personal income from other sources (employment, rental income) that already pushes you into the higher rate tax band — the dividend strategy works less efficiently in this case.
- Your accountant does not specialise in trades or small limited companies — a generalist accountant who is unfamiliar with CIS, VAT flat rate schemes and contractor invoicing will cost you more in mistakes and missed allowances than you save in tax.
- You are about to retire or wind down in the next 1–2 years — the cost and complexity of closing a company outweighs short-term tax gains.
Does CIS Apply Differently for Limited Companies?
CIS applies to both sole traders and limited companies doing subcontract work in the construction industry. The mechanics are similar — the contractor deducts 20% (or 30% if you are not registered) from the labour element of your invoice and pays it to HMRC on your behalf.
The key difference is where the deduction goes. As a sole trader, CIS deductions offset your personal self-assessment tax bill. As a limited company, they offset the company's Corporation Tax liability. If your CIS deductions in a year exceed the corporation tax owed, the company can reclaim the difference from HMRC.
Limited companies can also apply for gross payment status under CIS — meaning no deduction is made at source. This is available if the company has a good compliance record and annual turnover from construction above £30,000. Gross payment status significantly improves cash flow, particularly at higher turnover levels.
Practical Steps to Switch
If you have decided the time is right to incorporate, the process is straightforward:
- Get advice from a trade-specialist accountant — before doing anything else, confirm the switch makes financial sense for your specific situation. A good accountant will model the tax saving, explain the salary/dividend split and flag any CIS or VAT complications.
- Register at Companies House — costs £12 online and takes 24–48 hours. You will need a company name, a registered address and at least one director (you).
- Open a business bank account in the company name — all company income and expenses must go through this account. Do not mix personal and company finances.
- Notify HMRC — register the company for Corporation Tax within 3 months of starting to trade. If you are VAT registered, transfer the registration to the new company (or register the company separately). Update your CIS registration to reflect the limited company.
- Invoice from the limited company going forward — update your invoice template with the company name, registered number and registered address. Notify existing customers and contractors of the change.
Verdict
For most tradespeople, the crossover point where a limited company makes financial sense is around £40,000–50,000 net profit per year. Below that, the admin and accountancy costs often cancel out the tax saving. Above it — and especially above £60,000 — the saving is real and significant.
But tax alone should not drive the decision. If you are doing high-value work where a claim against you could exceed your insurance, the liability protection of a limited company is worth having regardless of the tax position. Talk to an accountant who understands the trades — not a generalist — before making the switch.
Frequently Asked Questions
Should a tradesperson operate as a sole trader or limited company in the UK?
For most tradespeople turning over under £35,000–40,000 per year, sole trader is simpler and the tax difference is marginal. Above £40,000–50,000, a limited company typically saves £3,000–8,000 per year in tax depending on how you structure your salary and dividends. The key factors beyond tax are: liability protection (limited company protects your personal assets if sued), VAT threshold management, CIS implications, and admin burden (limited companies require annual accounts filed at Companies House). Get advice from a trade-specialist accountant before switching.
At what turnover should a tradesperson go limited?
The tax break-even point for switching from sole trader to limited company is typically around £35,000–45,000 of net profit per year (after expenses). Below this, the accountancy fees and admin burden of a limited company often outweigh the tax savings. Above £50,000 net profit, the savings from paying yourself a small salary plus dividends become substantial. Some tradespeople earning £80,000+ net profit save £10,000–15,000 per year through limited company structure.
Does operating as a limited company affect CIS for tradespeople?
Yes — CIS applies to both sole traders and limited companies doing construction subcontract work. As a limited company, the main contractor still deducts CIS at 20% (or 30% if unregistered) from the labour element of your invoices. The CIS deduction offsets your corporation tax bill rather than your personal self-assessment. Limited companies can also apply for gross payment status, which removes the deduction entirely and is particularly valuable at higher turnover levels.