Sole trader vs limited company: which should a founder choose?

By Buzz Accounting · Updated 2026-07-13 · Startups guide

A startup that plans to grow or raise money is usually best set up as a limited company, although some founders start as sole traders and incorporate later.

A limited company suits most startups that plan to grow. It limits your personal liability, is often preferred by larger customers, can raise investment under the SEIS and EIS tax reliefs, and lets you keep profit in the company and plan how you pay yourself. Being a sole trader is simpler and cheaper to run, and suits a founder testing an idea alone on a modest income.

Sole trader vs limited company

	Sole trader	Limited company
Liability	Unlimited personal liability	Limited to the company
Tax on profits	Income tax and Class 4 National Insurance	Corporation tax, plus dividend tax on dividends
Raise investment	No SEIS or EIS	SEIS and EIS available
Admin	A Self Assessment return, plus quarterly updates once income is over £50,000	Annual accounts, a corporation tax return and a confirmation statement
Credibility	Fine for many	Often preferred by clients
Privacy	Details private	Some details public at Companies House
Best for	Testing an idea alone on a modest income	Startups that plan to grow or raise money

Why most startups incorporate

If you plan to take on risk, hire or raise money, a limited company is almost always the right structure. It keeps your personal assets separate from the business's debts, lets you take profit out tax-efficiently once the company is making a real profit (our salary and dividend calculator shows the split), is often preferred by larger customers, and is the only structure that can raise investment under SEIS and EIS.

When being a sole trader makes sense

If you are testing an idea alone, earning modestly and not yet taking on real risk or outside money, starting as a sole trader is cheaper and simpler. There are no company accounts or corporation tax return to file, and nothing to register at Companies House. Sole Trader Accountants, another Buzz Accounting site, covers that stage.

Moving from sole trader to limited company

Many founders start as sole traders and incorporate once the business grows. Incorporate before you raise money or take on serious risk, because investors need a company to buy shares in, and setting one up in the middle of a raise delays it. Our sole trader vs limited company calculator shows the tax difference at your level of profit.

Our verdict

If you plan to grow or raise money, incorporate. Limited liability and access to SEIS and EIS usually decide it. If you are testing an idea on your own, start as a sole trader and incorporate when the business grows, before you raise money or take on real risk.

Common questions

Should a startup be a sole trader or limited company?

Most startups that plan to grow should be limited companies, for limited liability, tax-efficient ways to take profit out and access to investment under SEIS and EIS. Being a sole trader suits a founder testing an idea alone, with modest income and no outside funding.

Can I raise investment as a sole trader?

You cannot sell shares as a sole trader, and SEIS and EIS, the tax reliefs UK angel investors rely on, are only available to companies. If you plan to look for investment, incorporate first.

Is a limited company more tax-efficient?

If you take all the profit out, the tax difference between a company and a sole trader is now small. A company saves more tax when profit is kept in the company at corporation tax rates, through pension contributions and by sharing income between shareholders. For a startup, limited liability and access to investment under SEIS and EIS are usually bigger reasons to incorporate.

Can I switch from sole trader to limited company?

Yes, and many founders do as the business grows. Incorporate before you raise investment or take on significant risk.

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