TRW & Co · Company law and governance
Sole Trader or Limited Company? Choosing the Right UK Business Structure
The sole trader vs limited company decision turns on liability, tax on the profits you draw, administration and credibility. Sole traders are simpler and cheaper to run but personally liable for every debt. A limited company separates the business from you, suits growth and investment, and brings public filings, identity verification and tighter rules on taking money out.
Key pointRecent rises in Corporation Tax, employer National Insurance and dividend tax rates mean incorporation is no longer an automatic tax win for owners who draw most of their profits; the stronger reasons are now liability, contracting and growth.
At a glance
Liability is the key difference
A sole trader is personally liable without limit for business debts; a company's shareholders risk only their share capital, unless they give personal guarantees.
Corporation Tax rates
For 2026, companies pay 19% on profits under £50,000, 25% above £250,000, and a marginally relieved rate between those two limits.
Dividend tax from April 2026
Dividends above the £500 allowance are taxed at 10.75%, 35.75% or 39.35%, depending on the shareholder's Income Tax band, from 6 April 2026.
Making Tax Digital applies
From 6 April 2026, sole traders and landlords with qualifying income over £50,000 must keep digital records and send quarterly updates to HMRC.
Switching needs a transaction
Incorporating an existing business requires a transfer agreement, contract novations, TUPE steps for staff and new tax registrations, not just a Companies House filing.
Swipe or scroll →
The short answer: sole trader vs limited company
The sole trader vs limited company choice comes down to four things: personal liability, tax on the profits you actually draw, the administration you are willing to carry, and how customers, lenders and investors will see you. A sole trader is the simplest way to start trading in England and Wales. A limited company costs more to run but separates the business from you.
As a rough rule, sole trader status suits low-risk work, modest profits and founders who want to keep things simple. A company becomes attractive once profits are retained in the business, contracts carry real liability, you plan to bring in co-owners or investors, or a client insists on contracting with a company.
Neither choice is permanent. Many businesses start as sole traders and incorporate later. But switching has its own tax and contractual consequences, so it pays to make the first decision deliberately.
The four main UK business structures
Most founders compare four options. The government's own overview of business legal structures is a sensible starting point, but the legal differences run deeper than the summary suggests.
Sole trader
A sole trader is a self-employed individual. There is no separate legal entity: you own the business assets, you sign the contracts, and you are personally liable for every business debt without limit. You register with HMRC for Self Assessment and pay Income Tax and National Insurance on the profits, whether or not you take the money out.
General partnership
Two or more people carrying on business together with a view to profit form a partnership under the Partnership Act 1890, even without a written agreement. In England and Wales a general partnership is not a separate legal person, and each partner is jointly liable for the firm's debts. A Scottish partnership, by contrast, does have separate legal personality, although partners remain ultimately liable.
Limited liability partnership (LLP)
An LLP, created under the Limited Liability Partnerships Act 2000, is a separate legal entity registered at Companies House. Members enjoy limited liability, but the LLP is usually tax-transparent, so members are taxed on their profit shares much like partners. LLPs are common for professional practices and some investment structures.
Private limited company
A private company limited by shares is a separate legal person under the Companies Act 2006. It owns its assets, signs its contracts and is liable for its own debts. Shareholders risk only what they have invested or agreed to pay for their shares, and directors run the company subject to statutory duties. Our guide to setting up a company in the UK walks through incorporation in detail.
Liability and risk: the core legal difference
Limited liability is the most important legal point in any sole trader vs limited company comparison. If a sole trader's customer sues for a defective service, or a supplier is left unpaid, the claimant can pursue the founder's personal assets: savings, car and potentially the family home.
With a company, the claim lies against the company. Shareholders do not answer for company debts beyond their unpaid share capital. That protection is real, but it is narrower than many founders expect.
- Personal guarantees. Banks, landlords and asset financiers routinely ask directors of small companies to guarantee the company's obligations. A signed guarantee puts you back on the hook.
- Director liability. Directors owe statutory duties to the company and can face personal liability for wrongful or fraudulent trading if the company becomes insolvent. See our guide to directors' duties in the UK.
- Personal wrongdoing. Incorporation does not shield an individual from liability for their own fraud, negligent misstatement in some circumstances, or certain regulatory breaches.
Limited liability protects you most when contracts are signed in the company's name, invoices and letterhead show the company's registered details, and you avoid giving personal guarantees by default. Founders who incorporate but keep trading informally in their own name can lose much of the benefit.
Tax compared: profits, drawings and National Insurance
Tax is usually what prompts the sole trader vs limited company question, but the answer depends on your profit level, how much you need to draw and whether you can leave profits in the business. The figures below are for the 2026 to 2027 tax year in England, Wales and Northern Ireland; Scotland sets its own Income Tax bands for non-savings income.
How a sole trader is taxed
A sole trader pays Income Tax on all business profits at the normal rates: nothing within the standard Personal Allowance of £12,570, then 20%, 40% and 45% across the bands. On top, Class 4 National Insurance applies at 6% on profits between £12,570 and £50,270 and 2% above that, according to HMRC's self-employed rates page. Tax is due on the profit as it arises, even if you leave cash in the business account.
How a company and its owners are taxed
A company pays Corporation Tax on its profits. HMRC's published Corporation Tax rates show a 19% small profits rate for profits under £50,000, a 25% main rate above £250,000, and marginal relief in between.
Owners then pay personal tax on what they extract. Salary attracts Income Tax, employee National Insurance and employer National Insurance (15% above the secondary threshold for 2026 to 2027). Dividends are paid from post-tax profits and, from 6 April 2026, are taxed at 10.75% in the basic rate band, 35.75% in the higher rate band and 39.35% in the additional rate band, after a £500 dividend allowance, per HMRC's tax on dividends guidance.
What the numbers mean in practice
The gap between the two structures has narrowed in recent years as Corporation Tax, employer National Insurance and dividend tax rates have risen. For many owner-managers who need to draw most of their profit to live on, the overall tax saving from incorporation is now modest. The advantage is clearer where profits can be retained in the company and reinvested, or extracted later in a planned way.
Any comparison should be modelled by an accountant on your real figures. Pension contributions, family shareholdings, the settlements legislation, IR35 for contractors and future exit plans can all change the answer. Our corporate and business tax team works alongside accountants on the legal side of these structures.
Sole trader vs limited company side by side
| Issue | Sole trader | LLP | Private limited company |
|---|---|---|---|
| Separate legal person | No | Yes | Yes |
| Owner liability | Unlimited, personal | Limited, subject to insolvency rules | Limited to share capital, subject to guarantees and director liability |
| Registration | HMRC Self Assessment | Companies House and HMRC | Companies House and HMRC |
| Tax on profits | Income Tax and Class 4 NIC on all profits | Members taxed on profit shares | Corporation Tax, then personal tax on salary or dividends |
| Public filings | None at Companies House | Accounts, confirmation statement, members and PSCs | Accounts, confirmation statement, directors and PSCs |
| Identity verification | Not applicable at Companies House | Required for members and PSCs | Required for directors and PSCs |
| Raising equity | Not possible | Limited, by admitting members | Straightforward by issuing shares |
| Privacy | High | Lower: details on public register | Lower: details on public register |
Administration, filings and compliance
Running a company means accepting a permanent compliance cycle. Directors must keep accounting records, file annual accounts and a confirmation statement at Companies House, file a Corporation Tax return, and operate PAYE if anyone (including a director) is paid a salary above the thresholds. From 1 February 2026, Companies House charges £100 to incorporate online and £50 to file a confirmation statement digitally, according to its fee announcement.
Since 18 November 2025, every new director and person with significant control must also verify their identity with Companies House. Our guide to Companies House identity verification explains the timing.
Sole traders are not free of red tape either. From 6 April 2026, sole traders and landlords with qualifying self-employment and property income over £50,000 must use Making Tax Digital for Income Tax, keeping digital records and sending quarterly updates through compatible software. The threshold is due to fall in later years, so more sole traders will be brought in.
VAT registration is the same for both: you must register once taxable turnover over the previous 12 months exceeds £90,000, or you expect to exceed it in the next 30 days, according to HMRC's VAT guidance.
Credibility, contracts and growth
Commercial perception often settles the sole trader vs limited company debate faster than tax. Larger customers and public bodies frequently prefer, or require, suppliers to be companies. Many recruitment agencies and end clients will only engage contractors through a limited company or an umbrella arrangement.
A company is also the only practical structure if you want to bring in co-founders, grant share options or raise investment. Shares can be issued, transferred and made subject to a shareholder agreement, and investors can benefit from schemes such as SEIS and EIS that only apply to companies. A sole trader cannot sell part of the business in the same way; selling usually means an asset sale.
Finally, a company outlives its founders. Ownership passes by share transfer, which makes succession and exit planning cleaner than unpicking a sole trader's personal assets and contracts.
Switching from sole trader to limited company
Incorporating an existing sole trader business is a transaction, not a form-filling exercise. The business and its assets are transferred to the new company, and each relationship needs attention.
- Model the tax. Have an accountant compare your position on real numbers, including capital gains on goodwill, any available reliefs on incorporation, VAT treatment of the transfer and the timing of your final sole trader tax return.
- Form the company. Choose a name that complies with the naming rules, adopt suitable articles, appoint directors and allot shares. Each director and PSC must provide a verified Companies House personal code.
- Document the transfer. Use a business transfer agreement setting out the assets, goodwill, liabilities and consideration. Without it, it may be unclear what the company owns.
- Move the contracts. Customer and supplier contracts are with you personally. Most need novation or consent to move to the company; some can be assigned.
- Deal with staff. Employees usually transfer automatically under TUPE, with information and consultation duties. See our TUPE team for complex cases.
- Update registrations. Open a company bank account, register for Corporation Tax and PAYE, and transfer or re-register VAT, licences, insurance and domain names.
- Close the old business properly. Tell HMRC you have stopped trading as a sole trader and file your final Self Assessment return.
Illustrative scenario: a growing consultancy
This scenario is illustrative only and uses generic parties.
A management consultant starts as a sole trader. Profits are modest, she works from home and her clients are small businesses on simple terms. The sole trader route keeps her costs and paperwork low, and her professional indemnity insurance covers most of her liability risk.
Two years later, a large corporate client offers a multi-year engagement but requires a limited company supplier, a liability cap negotiated in its standard terms and a data processing agreement. She also wants to bring in a business partner with an equity stake. At this point the sole trader vs limited company question has a clear answer: she incorporates, transfers the business under a written agreement, novates her existing contracts, signs a shareholder agreement with her new co-owner and reviews the corporate client's terms before signing. Her accountant sets a salary and dividend policy, and she retains part of the profit for growth.
Common mistakes to avoid
Incorporating purely for a tax saving that no longer exists
Older rules of thumb suggested that almost anyone earning above a modest profit should incorporate. Rate changes to Corporation Tax, dividend tax and employer National Insurance have eroded that gap. If you need to draw nearly all your profits to live on, the extra accountancy fees, filing obligations and loss of privacy may outweigh a small tax difference. For any sole trader vs limited company comparison, ask for a model based on your actual numbers and plans, not a generic calculator, and revisit it each year as rates change.
Treating the company's money as your own
Once you incorporate, the company's bank balance belongs to the company. Taking money out without declaring a salary or a properly declared dividend creates an overdrawn director's loan account, which can carry tax charges for the company and benefit-in-kind consequences for you. Dividends can only be paid out of distributable profits; unlawful dividends may have to be repaid. If the company later becomes insolvent, a liquidator will scrutinise these withdrawals closely and may pursue the director personally.
Forgetting that contracts do not move automatically
A common error is to incorporate and simply start invoicing from the company, assuming customer contracts follow. Legally, the original contract remains with you as an individual unless it is assigned or novated. This leaves you personally exposed under the old contract, may breach confidentiality or non-assignment clauses, and can confuse who owns intellectual property created for the client. Map your key contracts, check transfer clauses and obtain consents in writing.
Signing personal guarantees without negotiation
Limited liability is undermined if you personally guarantee the company's lease, overdraft and supplier credit. Guarantees are sometimes unavoidable for a new company with no trading record, but their scope, cap and duration are often negotiable. Consider a capped amount, a time limit, release once the company meets financial tests, or a rent deposit instead. Our guide to personal guarantees explains what to look for.
Ignoring partnership risk when working with others
Two sole traders who share clients, profits and decision-making can find they have created a general partnership by conduct, under the Partnership Act 1890. Each partner may then be liable for the other's business debts and actions within the partnership's business. If you collaborate regularly, either document a clear subcontracting or referral arrangement, or move to a company or LLP with written terms that set out ownership, decision-making and exit.
Cross-border founders and next steps
Founders and owners based overseas
Founders based outside the UK, including in Bangladesh, the Gulf or Singapore, usually find a private limited company more workable than sole trader status. A company can be owned and directed from abroad, provided each director and PSC completes identity verification, which can be done through GOV.UK One Login or an authorised corporate service provider. UK tax residence of the company, permanent establishment questions and the relevant double tax treaty all need checking.
Immigration is a separate issue: owning a UK company does not give anyone the right to work in the UK. For founders relocating from Bangladesh, our guide on a UK company for Bangladeshi founders sets out the steps.
Checklist before you decide
Before deciding, work through these questions:
- What is the realistic worst-case liability from your contracts, products or advice, and is it insurable?
- How much of the profit do you need to draw each year, and how much could stay in the business?
- Do key customers, platforms or lenders require a company?
- Will you bring in co-founders, employees with equity or investors within two to three years?
- Are you prepared for public filings, identity verification and the discipline of running company finances separately?
TRW & Co's London office, authorised and regulated by the Solicitors Regulation Authority, advises founders on structure, incorporation, shareholder arrangements and transferring an existing business. Our company formation and corporate teams work alongside your accountant. To discuss your sole trader vs limited company decision, contact us at info@trw.co.
Frequently asked questions
01Is it better to be a sole trader or a limited company in the UK?
It depends on your risk, profit level and plans. A sole trader is simpler, cheaper and more private, which suits low-risk work and modest profits. A limited company gives limited liability, makes it easy to bring in co-owners or investors and is often required by larger clients. Tax savings from incorporating have narrowed because of rate changes, so the decision increasingly rests on liability, contracting needs and growth plans rather than tax alone. An accountant should model the tax on your real figures.
02At what profit level should a sole trader become a limited company?
There is no single threshold. The answer depends on how much profit you need to draw, whether profits can stay in the company, pension contributions, family circumstances and future plans. With Corporation Tax at 19% to 25%, employer National Insurance at 15% on salaries above the threshold and higher dividend tax rates from April 2026, the saving for owners who withdraw most of their profit is smaller than it once was. Ask an accountant for a side-by-side calculation before incorporating.
03Can I be a sole trader and a company director at the same time?
Yes. You can run a sole trader business and be a director or shareholder of one or more companies. You must keep the businesses separate: separate bank accounts, separate records and contracts in the right name. Each must meet its own tax obligations. As a director, you must also verify your identity with Companies House and provide your personal code. Take care that customers know which business they are contracting with, as confusion can undermine limited liability.
04Does a limited company protect my house if the business fails?
Usually, yes, for the company's ordinary debts, because creditors' claims lie against the company. The protection falls away where you have signed a personal guarantee, for example for a lease or bank loan, or where you are found personally liable as a director, such as for wrongful trading or misfeasance in an insolvency. Taking unlawful dividends or running an overdrawn director's loan account can also lead to personal claims by a liquidator.
05How much does it cost to set up a limited company in the UK?
From 1 February 2026, Companies House charges £100 to incorporate a company online, and £50 to file each annual confirmation statement digitally. On top of that, budget for accountancy fees for annual accounts and Corporation Tax returns, payroll if salaries are paid, and legal fees if you need bespoke articles, a shareholder agreement or a business transfer agreement. Formation agents may charge their own fees, and identity verification through an authorised agent may also carry a fee.
06What is the difference between an LLP and a limited company?
Both are separate legal entities registered at Companies House with limited liability. A limited company is owned by shareholders, managed by directors and pays Corporation Tax on its profits. An LLP is owned and run by its members under an LLP agreement and is usually tax-transparent, so members pay Income Tax and National Insurance on their profit shares. LLPs suit professional firms and some partnerships; companies suit businesses seeking investment or share incentives.
Sources and official materials
- Business legal structures — GOV.UK overview of sole trader, partnership, LLP and company structures
- Corporation Tax rates and allowances — HMRC rates, small profits rate and marginal relief limits
- Tax on dividends — Dividend allowance and dividend tax rates for 2026 to 2027
- Self-employed National Insurance rates — Class 2 and Class 4 rates for sole traders
- Sign up for Making Tax Digital for Income Tax — Who must use MTD for Income Tax from April 2026
- Companies House fees are changing from 1 February 2026 — Incorporation and confirmation statement fees
- Limited Liability Partnerships Act 2000 — Statutory basis for LLPs
General information only, current as at 21 October 2026. It is not legal advice and does not create a solicitor–client relationship. It reflects the law of England and Wales unless stated otherwise; Scotland and Northern Ireland have separate legal systems, and the law changes frequently. Check current official sources and take advice on the facts of your matter.