What is the difference between a sole trader, a partnership and a limited company?
Whether the business is legally separate from you — and that single question drives liability, tax, admin and how you get paid.
Sole trader. You are the business. No legal separation.
Liability is unlimited — business debts are your debts, and personal assets are at risk.
Taxed through self assessment on profits, with income tax and Class 2/4 National Insurance. You are taxed on profit whether or not you withdraw it.
Minimal admin: register with HMRC, keep records, file a return. No public filing, so your finances stay private.
Partnership. Two or more people trading together. Similarly no separate legal personality in England and Wales.
Joint and several liability is the critical feature, and it is routinely underestimated: each partner is liable for the whole of the partnership's debts, including obligations incurred by another partner without your knowledge. One partner can bind all of you.
Profits are shared per the agreement and taxed on each partner individually. A written partnership agreement is essential; without one, the Partnership Act's default rules apply and they may not reflect what anyone intended.
Limited liability partnership (LLP). A separate legal person with limited liability, taxed like a partnership. Common in professional services. Requires public filing.
Limited company. A separate legal person.
Limited liability, subject to the substantial exceptions — personal guarantees especially.
Corporation tax on profits, then personal tax on salary or dividends extracted. Profits retained in the company are not personally taxed until drawn, which allows timing flexibility.
Public filing at Companies House, and directors' duties apply.
Perceived credibility, and some customers will only contract with companies.
More administration and cost.
Which to choose. Sole trader suits low-risk, low-profit early trading, and you can incorporate later. A company becomes attractive as profits rise, where liability risk is real, where customers expect it, or where you want to bring in shareholders. Partnership without a written agreement is the arrangement to avoid.
General information, not legal or tax advice.