Sole trader vs limited company: which is right for you in 2025?

New self-employed people often ask whether they should stay as a sole trader or form a limited company. The answer depends on profit level, risk, admin tolerance, clients, and how you want to take money out of the business.

The short version

A sole trader structure is usually simpler and cheaper to run. A limited company can offer limited liability and more planning options, but it brings Companies House filings, Corporation Tax, payroll, dividend paperwork, and more formal accounting.

Tax comparison at different profit levels

At lower profit levels, simplicity often wins. Income Tax and National Insurance as a sole trader may be easier to understand than paying Corporation Tax, salary, dividends, and accountancy fees through a company. At higher profit levels, company planning may become more attractive, especially if you do not need to withdraw all profits immediately.

Use the sole trader vs limited company calculator alongside the dividend vs salary calculator to compare scenarios before making the decision.

Liability and risk

A sole trader and the business are legally the same person. Business debts and claims can become personal debts, subject to insurance and the facts. A limited company is a separate legal entity, which can protect personal assets in many ordinary cases, but directors still have duties and can be personally exposed for wrongdoing, guarantees, or unpaid taxes in some situations.

Admin burden

Sole traders usually file Self Assessment and keep business records. Limited companies file accounts, confirmation statements, Corporation Tax returns, and often payroll submissions. The paperwork is manageable, but it is not free. Accountancy costs can wipe out the tax advantage for smaller businesses.

IR35 implications

IR35 mainly matters when you provide services through an intermediary such as your own limited company. If a client or agency treats the engagement as inside IR35, much of the tax advantage of a company can disappear because income is taxed more like employment income. Sole traders can still face employment status questions, but IR35 is specifically an intermediary regime.

When sole trader often makes sense

• You are testing a business idea or side income.
• Your profit is modest and you withdraw most of it for living costs.
• Your work has low liability risk and suitable insurance is affordable.
• You want simple records and fewer filings.

When a limited company may make sense

• You have higher profits and can leave some money in the company.
• You need limited liability for commercial risk.
• Clients prefer or require a company supplier.
• You want to bring in shareholders, build a brand, or sell the business later.

Decision checklist

1. Estimate annual profit after expenses.
2. Compare take-home under both structures.
3. Add accountancy, software, insurance, and Companies House admin costs.
4. Check client requirements and IR35 risk.
5. Consider liability, not just tax.

Official sources

GOV.UK explains working as a sole trader here: Set up as self-employed. Limited company setup guidance is here: Set up a limited company. IR35 guidance starts here: Understanding off-payroll working.