Quick answer: sole trader status is usually simpler and cheaper to administer, while a limited company is a separate legal entity with additional filing and governance responsibilities. Tax is only one factor in deciding which structure suits you.
Key differences
| Sole trader | Limited company | |
|---|---|---|
| Legal identity | You and business are the same legal person | Company is a separate legal person |
| Administration | Generally simpler | More statutory filings and records |
| Profit extraction | Business profit belongs to you | Salary, dividends and other company/director transactions |
| Public filings | Less public financial information | Accounts and company information filed at Companies House |
| Liability | Personal exposure can be greater | Limited liability, subject to exceptions and guarantees |
Is a limited company always more tax efficient?
No. Tax rates, profit level, how much cash you need personally, other income and future plans all matter. Incorporating purely because of an old rule-of-thumb turnover figure can lead to the wrong decision.
Administration and cost
A limited company normally has statutory accounts, Corporation Tax, Companies House filings and director/shareholder considerations. That usually creates more administration and professional cost than a simple sole trade.
When might incorporation be worth considering?
Consider it when profits are growing, commercial contracts favour a company, liability protection matters, you want to retain profits in the business, ownership may be shared, or longer-term succession/investment plans make a company useful.
Changing later
You can start as a sole trader and incorporate later. The transfer of assets, VAT, payroll, contracts and tax registrations should be planned rather than simply changing the name on invoices.
Frequently asked questions
At what profit should I become limited?
There is no single correct threshold. The answer depends on tax rates, drawings, other income, risk, admin costs and commercial plans.
Can I switch from sole trader to limited company?
Yes, but the transfer should be planned so registrations, assets, contracts and tax treatment are handled correctly.
Is a company safer?
Limited liability can reduce personal exposure, but it is not absolute and directors can still have personal responsibilities and guarantees.