Sole Trader vs Limited Company for UK Tradespeople — Which Is Right for Your Business in 2026?

This is not a prestige decision. It's a tax and liability decision — and for most tradespeople, the maths points the same way: stay sole trader until your profits consistently exceed £35,000–£40,000 after expenses. Below that threshold, the extra accountancy costs eat whatever tax you save. Here's the full breakdown.

How Sole Trader Taxation Works in 2026

As a sole trader, all your profit is treated as personal income and taxed accordingly. The 2025/26 rates that apply in 2026 are straightforward:

• Personal Allowance: 0% on the first £12,570 of profit — you pay nothing on this slice.
• Basic Rate: 20% on profit between £12,571 and £50,270.
• Higher Rate: 40% on profit between £50,271 and £125,140.
• Class 4 National Insurance: 6% on profits between £12,570 and £50,270, dropping to 2% on anything above that. Class 2 NI was abolished from April 2024, so there is no longer a flat weekly charge.

On a profit of £40,000, the combined Income Tax and Class 4 NI bill works out to roughly £7,900–£8,200 — an effective rate of around 18–20%. You file one Self Assessment return each year by 31 January. That is the entirety of your annual tax obligation.

How Limited Company Taxation Works in 2026

A limited company is a separate legal entity. It pays Corporation Tax on its profits, and you — as director and shareholder — pay yourself a combination of salary and dividends. The rates in 2026:

• Corporation Tax (small profits rate): 19% on company profits under £50,000.
• Corporation Tax (main rate): 25% on profits above £250,000, with marginal relief on profits between £50,000 and £250,000.
• Director's salary: Most directors pay themselves around £9,100 per year (the secondary NI threshold) to avoid employer NI while still accruing State Pension entitlement. Some pay up to £12,570 (the personal allowance) where the company has no other employees, as there is no employer NI on the director's salary below that level in many cases.
• Dividend Allowance: £500 of dividends are tax-free (reduced from £1,000 in April 2024).
• Dividend Tax: 8.75% at the basic rate, 33.75% at the higher rate — both lower than the equivalent Income Tax rates.

Example: £60,000 profit through sole trader vs limited company

At £60,000 profit as a sole trader, you pay Income Tax at 20% on £12,571–£50,270 and 40% on £50,271–£60,000, plus Class 4 NI at 6% up to £50,270 and 2% above. Total tax and NI: approximately £17,500–£18,000. Take-home: roughly £42,000–£42,500.

Through a limited company at the same profit level, you pay yourself a salary of £9,100 (no income tax, no NI). The remaining £50,900 is subject to Corporation Tax at 19% (approximately £9,671 at the small profits rate). After Corporation Tax you have roughly £41,229 available for dividends. After dividend tax at 8.75% on most of that sum, total tax and NI: approximately £13,500–£14,000. Take-home: roughly £46,000–£46,500 — a saving of around £4,000 before accountancy costs.

Factor in an additional £1,000–£1,500 in accountancy fees versus what you'd pay as a sole trader, and the net saving at £60,000 profit is roughly £2,500–£3,000. Real, but not transformative. At £80,000+ the saving grows to £5,000–£8,000 and the arithmetic becomes compelling.

The Tax Saving Tipping Point

The key constraint is accountancy costs. Running a limited company properly requires: annual statutory accounts filed at Companies House, a Corporation Tax return (CT600) to HMRC, PAYE payroll submissions via Real Time Information every time you pay yourself a salary, dividend minutes and vouchers, a Companies House confirmation statement each year, and your personal Self Assessment as a director.

Most tradespeople cannot do this themselves. A typical sole trader pays £300–£800 per year for a basic tax return and bookkeeping. A limited company director pays £1,000–£2,000 per year for the same accountant to handle the full suite of filings. That extra £700–£1,200 is the hurdle the tax saving has to clear.

The practical threshold: below £40,000 profit, the additional accountancy cost typically outweighs the tax saving. Above £50,000 profit, the saving is consistently positive. Between £40,000 and £50,000, it depends on your specific circumstances — run the numbers with an accountant who knows your situation before making the switch.

Liability Protection — the Honest Picture

"Limited" in limited company means your personal assets are protected if the company is sued or goes into debt. As a sole trader, you and the business are legally the same person — a client who successfully sues you can pursue your home, savings and personal assets.

In practice, the picture is more nuanced for tradespeople:

• Professional liability insurance covers most realistic risks. Public liability cover of £1m–£5m handles the vast majority of domestic claims. For most domestic tradespeople, a serious uninsured liability claim is a theoretical risk, not a day-to-day one.
• Courts can pierce the corporate veil. If you trade fraudulently, allow debts to accumulate knowing the company can't pay, or sign personal guarantees (common with business loans or van finance), the limited company offers no protection for those obligations.
• For large commercial work, it matters more. If you're working on substantial construction projects where a negligence claim could exceed your insurance limits, limited liability is genuinely valuable protection. For fitting a kitchen or servicing boilers, it matters much less.

IR35 — Off-Payroll Working

If you operate through a limited company but work exclusively or primarily for one main contractor over a long period, HMRC may determine that you are effectively an employee of that contractor — which triggers IR35 (the off-payroll working rules). If IR35 applies, you lose the tax benefits of operating through a company: your income is treated as employment income and taxed at full PAYE rates.

IR35 is most relevant to tradespeople who subcontract to a single main contractor on long construction projects. The key indicators HMRC looks at are: substitution (can you send someone else in your place?), control (does the contractor dictate how and when you work?), and mutuality of obligation (are you expected to accept all work offered?).

If you work for multiple clients, use your own tools and equipment, set your own working hours, and can substitute another worker, IR35 is unlikely to apply. If you're essentially on-site five days a week for one company indefinitely, get advice before incorporating.

Business Bank Accounts

Sole traders can legally use a personal bank account for business income and expenses, though keeping them separate (with a dedicated business account) makes bookkeeping significantly easier and less error-prone.

Limited companies must have a separate business bank account — it is a legal and practical requirement. Company money belongs to the company, not to you personally. Many business bank accounts charge £5–£25 per month in fees, though several challenger banks (Tide, Starling, Monzo Business) offer free or low-cost accounts for small companies.

VAT — the Same for Both Structures

VAT applies equally to sole traders and limited companies. If your taxable turnover exceeds £90,000 in any rolling 12-month period, you must register for VAT regardless of your business structure. The threshold is the same whether you are a sole trader or a limited company director.

VAT registration does not change with incorporation. If you are VAT registered as a sole trader and then incorporate, your VAT registration does not automatically transfer to the new company — you need to register the company separately with HMRC and cancel your sole trader VAT registration.

Making the Switch — What's Involved

Incorporating is not irreversible, but unwinding it involves more work than setting it up. The switch process:

1. Register the company at Companies House (gov.uk). Online registration costs £12 and takes minutes. You need a company name, a registered address, and details of directors and shareholders.
2. Open a business bank account in the company's name before trading through it. Do not mix company and personal funds.
3. Register for Corporation Tax with HMRC within three months of starting to trade.
4. Set up payroll (RTI) if you plan to pay yourself a salary. HMRC's free Basic PAYE Tools can handle this for a single director.
5. Inform your customers — update invoices, bank details and any standing orders. Your company name and company number must appear on all invoices.
6. Update your CIS registration if you work in construction. Re-register under the company's details and notify contractors who pay you.
7. Submit a final Self Assessment for your sole trader period up to the date you stopped trading, and notify HMRC that you are no longer self-employed as a sole trader.

The cleanest time to make the switch is at the start of a new tax year (6 April). It avoids splitting a trading year across two structures, which simplifies both sets of accounts.

Sole Trader vs Limited Company — At a Glance

The Decision Summary

Stay sole trader if: your profit is consistently under £40,000 after expenses, the majority of your work is B2C (homeowners), and you want minimal admin overhead. The tax saving from incorporating simply does not outweigh the cost and complexity at this level.

Consider a limited company if: your profit is consistently above £50,000, you take on large B2B contracts where clients ask for a limited company, you want a clear legal separation between your personal and business assets, or you have a business reason to retain profits inside the company (buying equipment, planning for growth). At this profit level, the numbers work and the switch pays for itself.

In either case, get an accountant who works with tradespeople to run the numbers for your specific situation before making the switch. The figures in this guide are a framework — your actual saving depends on your profit level, personal tax position, salary structure and other income.