Sole Trader vs Limited Company

Choosing a business structure is one of the first decisions you make, and one of the few that is genuinely hard to undo cheaply. It sets who is liable if things go wrong, how your profits are taxed, how much of your information sits on a public register, and how much paperwork lands on your desk each year. This comparison sets out sole trader and limited company side by side across the factors that matter in practice, rather than the ones that get argued about online.

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Feature	Sole Trader	Limited Company
Personal liability	Unlimited — you are personally liable for debts	Limited to investment — personal assets protected
Setup cost	Free (register with HMRC)	£100 online via Companies House
Tax	Income Tax + Class 2/4 NI	Corporation Tax (25%) + personal tax on dividends/salary
Annual accounts	Self Assessment tax return	Annual accounts + confirmation statement to Companies House
Public information	Name only	Directors, registered office, accounts on public register
Admin burden	Low	Higher — statutory duties, filings, potential audit
Credibility	Adequate for many small businesses	Often preferred by larger clients and investors
Annual filing requirements	Self Assessment tax return (SA103) by 31 January	Annual accounts + confirmation statement + CT600 to HMRC
Tax-free dividend allowance access	No dividends — all profit taxed as income	Yes — £500 dividend allowance (2025/26); can extract profit tax-efficiently

Sole trader or limited company?

Two questions settle this for most people: how much risk the work carries, and how much profit you expect. As a sole trader there is no legal separation between you and the business, so a bad debt or a claim reaches your personal savings and, in the worst case, your home. A limited company is a separate legal person, so liability normally stops at what you have put in. That protection is the real argument for incorporating — tax is secondary.

Stay a sole trader if you are testing an idea, earning modestly, or working in a low-risk field. Registration is free, the admin is a single tax return, and only your name appears publicly.
Incorporate if you sign contracts with real financial exposure, employ people, need trade credit, or expect profits comfortably above what you need to draw as income.
Think again about incorporating if privacy matters to you — directors' names, the registered office and accounts all go on a public register anyone can search.

The mistake that costs the most is incorporating for the tax and then ignoring what comes with it. A company brings statutory directors' duties, an annual confirmation statement, accounts filed to a deadline, Corporation Tax returns and separate personal filings on any salary and dividends. Late filing penalties apply even when the company made no money at all.

The other frequent error is treating company money as your own. Company funds belong to the company, and taking them out without recording salary, dividends or a director's loan creates tax problems that are far more expensive to fix than to avoid.

Frequently asked questions

Can I change from sole trader to a limited company later?

Yes, and a great many businesses do exactly that once profits grow or a client insists on it. You incorporate a new company, transfer the trade and any assets across, tell HMRC your sole trader business has ceased, and re-register for VAT and PAYE in the company's name where relevant. It is not a formality — contracts, bank accounts, insurance and licences all have to be moved. Take accountancy advice on the transfer of assets, because there can be a tax charge on the way through.

What happens if I file my company accounts late?

Companies House charges an automatic late filing penalty that increases the longer the delay runs, and it doubles if you file late two years running. HMRC applies separate penalties for a late Corporation Tax return. Persistent failure can lead to the company being struck off and to directors being disqualified. None of this depends on whether the company traded or made a profit — a dormant company still has filing obligations, so diarise the dates as soon as the company is formed.

Does being a limited company actually save tax?

Sometimes, but far less reliably than people expect. A company pays Corporation Tax on its profits, and you then pay personal tax on whatever you take out as salary or dividends, so the same money is looked at twice. The saving depends on how much profit there is, how much you need to draw, and current allowance levels. At modest profits the extra accountancy and filing costs can wipe out any benefit. Run the numbers for your own figures before deciding.

Do I need a separate business bank account?

A limited company must have its own account, because the money legally belongs to the company rather than to you. Sole traders are not required to have one, but it makes bookkeeping far simpler and removes arguments with HMRC about which transactions were business expenses. Whichever structure you choose, keep business and personal spending apart from day one — reconstructing it later from a mixed personal account is one of the most common reasons small businesses miss deadlines.

Related guides

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Choosing the right business structure is one of the most important decisions you will make as a new business owner. Sole trader and limited company are the two most common options, each with distinct implications for tax, personal liability, and administrative burden.

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Disclaimer

The information on this page was correct at the time of writing. Amounts, thresholds, and rules may change. Always check the latest official guidance.