Published by AccTek | 2026–27 tax year figures throughout | Information, not advice
A sole trader is an individual running a business in their own name. A limited company is a separate legal entity — distinct from its directors and shareholders, with its own rights and obligations in law.
If you’re weighing up which structure suits your situation, you’re in good company. It’s the most common question we hear from freelancers, contractors, and people starting out in business. The right answer turns on your profit level, your commercial circumstances, and how much compliance admin you’re prepared to take on.
This guide covers the key differences in a comparison table, walks through the tax maths at different income levels, explains the non-tax factors that often tip the decision, and ends with a free calculator you can run in under a minute. All figures use 2026–27 tax year rates.
This guide is information, not advice. Individual circumstances — your other income, growth plans, and risk profile — determine what’s right for you.
| Sole Trader | Limited Company | |
|---|---|---|
| Legal status | You and the business are the same legal entity | Separate legal entity — distinct from directors and shareholders |
| Income tax | All profits taxed as personal income at 20%, 40%, or 45% | Corporation tax on profits (19% or 25%); director draws salary + dividends |
| National Insurance | Class 2 (£3.45/week if profits exceed £6,725) + Class 4 (9% on profits £12,570–£50,270; 2% above) |
Class 1 on director salary only; no NI on dividend income |
| Personal liability | Unlimited — business debts are your personal debts | Limited to the value of shares held |
| Admin burden | Self Assessment only (SA100 + SA103) | CT600 + annual accounts (Companies House) + confirmation statement + payroll RTI |
| Setup | Register with HMRC — effective immediately, free | Incorporate via Companies House — 24–48 hours, ~£50 fee |
| MTD ITSA | Applies from April 2026 for qualifying income above £50,000; quarterly digital submissions via HMRC-approved software |
Director’s personal qualifying income falls under MTD ITSA rules in the same way; company itself files CT600 separately |
Sources: HMRC — Income Tax rates and allowances; GOV.UK — Corporation Tax rates; GOV.UK — National Insurance: the basics; Companies House — Set up a limited company. 2026–27 figures throughout.
As a sole trader, every pound of profit above your Personal Allowance (£12,570 in 2026–27) is subject to Income Tax: 20% on profits between £12,570 and £50,270 (the basic rate band), 40% on profits between £50,270 and £125,140, and 45% on anything above. The allowance tapers to zero for those with income above £100,000 — at a rate of £1 lost for every £2 over the threshold.
On top of Income Tax, you pay Class 4 National Insurance on profits: 9% between £12,570 and £50,270, and 2% above that. You also pay Class 2 NI (£3.45 per week, 2026–27) if your profits exceed the Small Profits Threshold of £6,725.
The structure is simple — one annual Self Assessment return covers it all — but every pound of profit above the Personal Allowance is taxed at the marginal rate. At £45,000 profit, the effective combined rate (Income Tax plus NI) on profits above the Personal Allowance is approximately 29%.
GOV.UK — Self Assessment tax returns
A limited company pays Corporation Tax on its profits: 19% (the small profits rate) on profits up to £50,000, and 25% (the main rate) on profits above £250,000. Marginal relief applies for profits between those two thresholds. These are the rates for the 2026–27 tax year.
As a director-shareholder, you typically draw a salary up to the NI Primary Threshold (£12,570 in 2026–27) — meaning no employee or employer NI is due on the salary itself — then take the remainder of your income as dividends from after-tax profits. Dividends are taxed at lower rates than employment income: 8.75% (basic rate), 33.75% (higher rate), and 39.35% (additional rate). There is a dividend allowance of £500 in 2026–27, taxed at 0%.
Combining a modest salary with dividends is the mechanism through which a limited company can produce a lower overall tax bill than the equivalent sole trader income. For a detailed walkthrough of how to structure this, see our guide to director salary and dividends for 2026–27.
GOV.UK — Corporation Tax rates and reliefs; HMRC — Tax on dividends
At approximately £30,000–£35,000 in annual profit, a limited company structure typically begins to show a meaningful net tax advantage over sole trader status. Below that level, the saving is often modest — and may be outweighed by higher accountancy costs.
Above £50,000 profit, the gap tends to widen as sole traders enter the 40% Income Tax band whilst a limited company continues to pay 19% Corporation Tax on the first £50,000 of profit. At profits above £100,000, the Personal Allowance taper and the additional-rate dividend tax make the comparison more nuanced.
The exact crossover depends on your personal circumstances: other income sources, use of the dividend allowance, pension contributions, and IR35 status if you work through contracts. Use our sole trader vs limited company calculator to run an indicative comparison with your own profit figure.
A straightforward tax comparison rarely captures the full picture. Running a limited company typically costs £1,000–£2,500 more per year in accountancy fees than sole trader self-assessment, because the compliance workload is considerably heavier. Companies House charges annual fees for the confirmation statement (currently £34 online), and there is the time cost of maintaining bookkeeping records to the standard required for statutory accounts.
At a profit level of £35,000, the net cash benefit — after the additional accountancy cost — may be in the region of £500–£1,500 per year, depending on your circumstances. That may not justify the administrative overhead for every business at that level. At higher profits, the calculation tends to favour the limited company more clearly. This is precisely the kind of question a qualified accountant works through with you.
As a sole trader, there is no legal separation between you and your business. Business debts are your personal debts — your home, savings, and other personal assets can be at risk if the business cannot meet its obligations.
A limited company is a distinct legal entity. Shareholders’ liability is generally limited to the value of their shares, so personal assets are protected unless you have given a personal guarantee (common for business loans, commercial leases, or credit facilities). For contractors, consultants, or anyone carrying meaningful commercial risk, this separation is often a significant factor — independent of the tax question entirely.
Some enterprise clients, public sector frameworks, and staffing agencies require suppliers to operate through a limited company. This is particularly relevant for IT contractors and consultants working on larger projects or through intermediaries. If winning a specific category of contract requires a corporate entity, the structure decision is partly commercial — not a purely financial calculation.
A limited company must file: a Corporation Tax return (CT600) each year; statutory accounts with Companies House (within nine months of the accounting period end); a confirmation statement (annually); and payroll Real Time Information (RTI) submissions if directors receive a salary. VAT registration requirements are the same regardless of structure — the
current threshold is £90,000 in a rolling twelve-month period (2026–27).
A sole trader files a single Self Assessment return each year. The compliance stack is materially lighter. Many sole traders who incorporate find the increase in accountancy and administrative overhead more substantial than they expected — an honest conversation to have with your accountant before making the switch.
Making Tax Digital for Income Tax (MTD ITSA) applies from April 2026 to self-employed individuals and landlords with qualifying income above £50,000. Quarterly digital
submissions must be made via HMRC-approved software. Both sole traders and limited company directors may be within scope — the obligation is based on personal qualifying income, not business structure.
This guide cannot make the decision for you — your other income, growth trajectory, commercial context, and risk appetite all influence the outcome. The framework below captures the most common considerations.
| Profile | Structure often considered |
|---|---|
| Profits under ~£25,000; solo; minimal commercial risk | Sole trader — simpler, lower cost overall |
| Profits ~£30,000–£50,000+; scaling; working with contract clients |
Limited company — potential tax efficiency at this level |
| Raising investment; multiple shareholders | Limited company — required structure |
| IT contractor with IR35 exposure | Limited company with appropriate IR35 review |
| Landlord or property investor | Depends on portfolio size, mortgage position, and longer-term plan |
If you are just getting started, you can register as a sole trader and begin trading immediately, then incorporate later — switching structure is entirely possible, though it involves some
administrative steps. If you are already operating as a sole trader, keeping disciplined sole trader bookkeeping records now will make any future transition smoother and
less costly.
Our team of accountants for startups regularly helps founders work through this decision at the point of launch — before any structure is locked in.
Run the numbers using your own profit figure — no sign-up or email required.
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Use the Free Sole Trader vs Limited Company Calculator
Enter your expected annual profit and the tool produces a side-by-side tax comparison for both structures. This is an indicative estimate based on 2026–27 standard rates; it does not account for
individual circumstances such as other income, pension contributions, or IR35 status. Treat it as a guide, not a personal tax calculation.
At profits below around £25,000–£30,000 per year, a sole trader structure is typically cheaper overall when you account for the higher accountancy fees a limited company requires. Above £30,000–£35,000 profit, a limited company often produces a lower combined tax bill — but the net benefit depends on your personal circumstances, including any other income and your use of the dividend allowance. Our calculator gives you an indicative figure based on your numbers.
The question becomes meaningful when profits consistently exceed £30,000–£35,000 per year, when you need to win contracts that require a corporate entity, or when personal liability has become a material concern. It is also worth reviewing when you plan to scale, bring in staff, or raise external investment. There is no universal trigger — the right moment is personal.
Yes. You can incorporate at any point. The process involves registering a new company with Companies House, transferring business activities to the company, informing HMRC, and de-registering your sole trader status. A qualified accountant will manage the transition and ensure there are no gaps in your compliance obligations or tax position during the changeover.
Higher compliance costs (annual accounts, CT600, confirmation statement), typically £1,000–£2,500 more in accountancy fees each year than a sole trader arrangement, less flexibility in extracting cash from the business (all distributions must follow the correct legal process), and an ongoing administrative overhead that sole traders do not face. For some businesses, particularly at lower profit levels, the tax saving does not outweigh these factors.
As a rough guide, the net tax advantage typically becomes meaningful at around £30,000–£35,000 in annual business profit. Below that level the saving is often small and may be absorbed by higher accountancy fees. Above £50,000 profit the advantage generally grows more significant, particularly once income enters the higher rate Income Tax band for a sole trader. Individual circumstances vary considerably.
At equivalent profit levels above roughly £30,000–£35,000 per year, a sole trader typically pays more in combined Income Tax and National Insurance than a director-shareholder of a limited company drawing the same level of income through an optimal salary-and-dividend structure. Below that level the difference narrows, and the outcome depends on individual circumstances.
“Self-employed” describes your employment status for tax purposes — meaning you work for yourself rather than as an employee of someone else. “Sole trader” is a specific business structure. As a sole trader you are self-employed, but you can also be self-employed as a partner in a partnership. A limited company director who is also an employee of that company is not self-employed in the same sense, even if they effectively run their own business.
MTD ITSA is an obligation on individuals — sole traders and landlords — with qualifying income above £50,000 from April 2026. It does not apply to limited companies as corporate entities (companies submit Corporation Tax returns under separate rules). However, a limited company director who has personal sole-trader income or rental income above the threshold would be within scope of MTD ITSA in their own name. GOV.UK — Making Tax Digital for Income Tax
The decision involves more than a tax comparison. Your growth plans, commercial contracts, risk profile, and personal income all play a role — and the right answer can change as your business develops. Our team works with sole traders, freelancers, and limited company directors across the UK.
AccTek — qualified chartered accountancy practice · ICPA member · AML-supervised by HMRC.
All figures in this guide use 2026–27 tax year rates. This article is information, not advice. Tax treatment depends on individual circumstances — speak to a qualified accountant for guidance specific to your situation.
Godwin Pinto ACA (ICAI) is the founder of AccTek and a member of ICPA, with 20+ years of experience in accounting and tax for contractors, startups and SMEs. Previously at PwC.
AccTek is a member firm of the Institute of Certified Practising Accountants (ICPA). Our accountants have a wide range of qualifications and accreditations from trusted professional bodies such as the AAT, ICPA, and ACCA.
