Sole Trader or Limited Company: How to Actually Decide

Why the rule of thumb is unreliable

The tax comparison depends on Corporation Tax rates, dividend rates, the dividend allowance and National Insurance, all of which have moved in recent years and not in the same direction.

The dividend allowance in particular has been cut repeatedly, which has narrowed the gap that made incorporation obviously worthwhile. Any specific figure you read is a snapshot, so run your own numbers on current rates.

The tax difference is smaller than it was, and the admin difference is not. Weigh both, not just the first.

The admin is the underrated half

A company brings obligations that do not exist for a sole trader: annual accounts and a confirmation statement at Companies House, a CT600, Corporation Tax payable before the return is due, and separate director responsibilities.

You will also generally need accruals accounting and a balance sheet rather than a simple income-and-expenses summary. For many people the accountancy fee difference alone eats a chunk of the tax saving.

Reasons that have nothing to do with tax

Limited liability is genuine, though it is weakened where you personally guarantee borrowing. Some clients, particularly larger organisations and public sector bodies, will only contract with a company. Some sectors expect it as a signal of scale.

Conversely, if your engagements are likely to be determined inside the off-payroll rules, a company brings much of the cost and less of the benefit.

It is not irreversible, but it is not free either

You can incorporate later, and you can stop. Neither is costless: incorporating involves transferring the business, and closing a company properly takes time and money.

The practical answer for most people starting out is to begin as a sole trader, keep clean records, and revisit once the numbers are real rather than projected. Deciding on an accountant's view of your actual figures beats deciding on an article, including this one.