Sole trader, partnership or limited company: choosing a business structure

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One of the first decisions when starting a business is its legal structure. It affects who is responsible for debts, how you pay tax, what paperwork you file and how the business looks to customers and lenders. This guide uses the UK as its example because the three main options there are common in similar forms elsewhere. It is general information only: check the current rules with HMRC and Companies House, or the equivalent authorities where you live, and take advice from an accountant before deciding.

Sole trader

A sole trader is a self-employed individual running a business in their own name, or under a trading name.

Liability: you are personally responsible for all the business's debts. There is no legal separation between you and the business.
Setting up: there is no company to register. In the UK you register with HMRC for Self Assessment, generally once your trading income goes over the threshold for a tax year, which GOV.UK currently gives as 1,000 pounds. You can register earlier.
Tax: you pay income tax on your profits through Self Assessment, and National Insurance may apply depending on your profits.
Paperwork: keep records of income and expenses from the day you start trading, and file a tax return each year.
Good for: low-risk businesses, testing an idea, freelancers and people starting small.

Partnership

An ordinary partnership is two or more people running a business together without forming a company.

Liability: partners personally share responsibility for the business, including its debts and any losses.
Setting up: the partnership registers with HMRC, and one partner is the nominated partner who manages the partnership's tax returns and records.
Tax: profits are shared and each partner pays tax on their own share.
Agreement: the law does not require a written partnership agreement, but you should have one. It should cover how profits are split, who decides what, what happens if someone leaves, and how disputes are settled.
Limited liability partnerships: an LLP is a separate structure with different rules, registered with Companies House. It is often used by professional firms.

Limited company

A private limited company is a separate legal entity from the people who own and run it.

Liability: shareholders are generally responsible only up to the value of their investment. Directors can still be personally liable in some situations, for example if they give personal guarantees or breach their duties.
Setting up: the company must be registered with Companies House before it starts trading. You need at least one director and at least one shareholder, who can be the same person, a registered office address, governing documents and a standard industrial classification code. You also identify any people with significant control.
Identity checks: Companies House now requires directors and people with significant control to verify their identity. Check the current process on GOV.UK.
Tax: the company registers for and pays Corporation Tax on its profits. Directors pay personal tax depending on how they take money out, whether as salary, dividends or a loan.
Paperwork: annual accounts, a confirmation statement, a company tax return, and record keeping. Company details are on a public register.
Good for: businesses with more financial risk, those planning to take investment or employ staff, or where customers expect to deal with a company.

Questions to ask before choosing

How much financial risk does the business carry? Debts, contracts, stock, premises and the chance of being sued.
How much profit do you expect? The tax comparison between structures depends on profit level and your personal circumstances.
Will you work with others? A partnership or a company with several shareholders needs clear agreements.
Do you plan to raise investment? Investors generally buy shares, which needs a company.
How much admin will you take on? A company means more filing and stricter rules on taking money out.
Do your customers care? Some larger clients prefer or require suppliers to be limited companies.

Other registrations to remember

Whatever the structure, check whether you need to register for VAT, any licences for your trade, insurance, data protection obligations and, if you employ people, payroll. Many people start as sole traders and incorporate later as the business grows; an accountant can advise when that makes sense.

Get advice

Tax and liability rules change and depend on individual circumstances. GOV.UK has official step-by-step guides for each structure, and a qualified accountant or solicitor can advise on your situation. Outside the UK, look for your national tax authority and company registry. Which structure did you choose, and what made the difference? Share your experience or questions in the comments.