Ltd vs Sole Trader vs LLP: Which Structure Is Right for You

The three structures in plain terms

A sole trader is the simplest way to run a business. You and the business are the same legal person, so you keep all the profits after tax, but you are also personally responsible for any debts the business runs up. You can start trading straight away and only need to register with HMRC for Self Assessment once you earn more than £1,000 in a tax year, which runs from 6 April to 5 April.

A limited company is a separate legal entity. Under section 16 of the Companies Act 2006, once a company is registered it becomes a body corporate that is legally distinct from the people who own it. That separation is what gives you limited liability: owners are responsible for business debts only up to the value of their financial investment in the company. In return, the company must register at Companies House, pay Corporation Tax and file accounts on the public record.

An LLP sits between the two. Section 1 of the Limited Liability Partnerships Act 2000 makes an LLP a body corporate with legal personality separate from its members, so members are not personally liable for debts the business cannot pay. Unlike a company, though, an LLP is not taxed in its own right on trading profits. Each member pays tax on their share of the profits through Self Assessment, in the same way as an ordinary partnership. An LLP needs at least two members and must have at least two designated members at all times.

Liability: who is on the hook for debts

This is the single biggest difference between the structures and often the deciding factor. As a sole trader you have unlimited liability, which means there is no legal wall between your business and your personal finances. If the business cannot pay its bills, creditors can pursue your personal assets. That is manageable for low-risk work with few liabilities, but it becomes a real concern if you take on stock, staff, premises leases or client contracts that could go wrong.

A limited company and an LLP both give you limited liability because each is a separate legal person in its own right. For a company, owners risk only what they have invested in shares. For an LLP, members are not personally liable for debts the business cannot pay. That protection is not absolute in practice: directors and members can still be personally exposed if they give personal guarantees, act fraudulently or breach their legal duties, so it reduces routine commercial risk rather than removing all responsibility.

If your work carries meaningful financial or contractual risk, limited liability is usually worth the extra admin. If your business is low-risk and you are comfortable carrying the exposure, the simplicity of being a sole trader may outweigh it. Good business insurance matters whichever route you take.

Tax: how each structure is taxed

Sole traders and LLP members are taxed personally. Profits are treated as your income and taxed through Self Assessment. For 2026 to 2027 the standard Personal Allowance is £12,570, then Income Tax applies at 20% on income from £12,571 to £50,270, 40% from £50,271 to £125,140 and 45% above £125,140. On top of Income Tax, self-employed people pay National Insurance: Class 2 is treated as paid once profits reach the Small Profits Threshold of £7,105, and Class 4 is charged at 6% on profits between £12,570 and £50,270 and 2% on profits above £50,270. The Class 2 rate, if you pay voluntarily, is £3.65 a week.

A limited company pays Corporation Tax on its profits instead. For accounting periods from 1 April 2023 the small profits rate is 19% on profits up to £50,000 and the main rate is 25% on profits over £250,000, with Marginal Relief tapering the rate between those two thresholds. Because the company is a separate person, money you take out as salary or dividends is then taxed in your own hands. For 2026 to 2027 there is a £500 tax-free dividend allowance, and dividends above it are taxed at 10.75% for basic-rate taxpayers, 35.75% for higher-rate and 39.35% for additional-rate taxpayers.

There is no single winner here. At lower profits the simplicity of Self Assessment often suits sole traders and LLP members. As profits grow, the company route can offer planning flexibility because you choose when and how to extract money, but it comes with two layers of tax and more admin. The right structure depends on your profit level, how much you need to draw personally, and whether you want to retain profit in the business.

Registration and filing obligations

Setting up as a sole trader is the lightest option. You register with HMRC for Self Assessment, keep records of your income and expenses, and submit one tax return a year. There is no Companies House registration and no separate set of accounts to publish. A traditional partnership is similar, with a nominated partner responsible for the partnership's tax returns and records.

A limited company carries the heaviest ongoing obligations. You register at Companies House, which costs £100 online or £124 by post. After that you must keep accounting records, file annual accounts and a Company Tax Return, and pay Corporation Tax. First accounts are due 21 months after the date you registered, and thereafter annual accounts are due 9 months after your financial year ends. Corporation Tax is payable 9 months and 1 day after your accounting period ends, and the Company Tax Return is due 12 months after it ends. You must also file a confirmation statement at least once every 12 months, which costs £50 online.

An LLP sits close to a company on admin. It registers at Companies House, and its designated members must keep accounting records, prepare and file annual accounts, and file a confirmation statement each year. Individual members also register for Self Assessment and report their share of profits. So an LLP combines company-style filing at Companies House with partnership-style personal taxation. Across all structures, you must register for VAT once your taxable turnover passes £90,000 a year.

Privacy: what the public can see

Privacy is an underrated part of this decision. As a sole trader your business finances are private. You do not file accounts on any public register, and there is no public record of your profits or your home address tied to a filing.

Both companies and LLPs are on the public Companies House register. Their accounts, registered office address and details of the people running them are publicly available and free to search. If you use your home address as the registered address, that address becomes public. LLP members' details and companies' people with significant control are likewise part of the public record.

For many founders the transparency is a fair trade for limited liability and looks professional to clients and suppliers. If keeping your affairs private matters a great deal, the sole trader route avoids public filings, though you can reduce exposure by using a separate registered office address rather than your home for a company or LLP.

Side-by-side comparison

The table below summarises the practical differences across the five factors that matter most. Use it as a quick reference, then weigh the factors against your own circumstances rather than treating any one row as decisive.

No structure is best for everyone. A freelance consultant with low liabilities and a preference for privacy may be well served as a sole trader, while a founder taking on staff, investment or contractual risk usually benefits from a company. An LLP suits professional groups who want limited liability while still being taxed personally on their profit share.

Conclusion

There is no universally correct structure, only the one that fits how you work. Start from liability: if your business carries real financial or contractual risk, the protection of a limited company or an LLP is usually worth the extra filing. Then look at tax and admin: sole traders keep things simple with a single Self Assessment return, companies gain flexibility in how profit is extracted but pay two layers of tax and file publicly, and LLPs blend company-style filing with personal taxation. Privacy tips the balance for some, since only sole traders keep their finances off the public register.

Whatever you choose, the decision is not permanent. Many founders begin as sole traders and incorporate later as profits and risk grow, and the figures in this guide will help you judge when that switch makes sense. If you want help getting set up correctly the first time, see how Nasara Connect can help you start your company, or get in touch to talk through your circumstances before you register.

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