The choice of legal form is usually made in ten minutes, on advice about setup cost, and then lived with for a decade. Three considerations deserve more weight than the fee.
Liability is the first question
A limited liability company separates the business’s obligations from the founder’s personal assets. A sole trader does not — the person and the business are the same, and creditors can reach personal property.
The separation is not absolute. Personal guarantees given to a bank or a landlord punch straight through it, and in practice a new company will be asked for them. But the default position still matters, and it matters most in the situations nobody plans for.
Credibility with the people you need
Larger customers, banks and public bodies treat the forms differently. Some procurement processes are effectively closed to sole traders. Suppliers may extend credit to a registered company and decline it to an individual.
If your plan depends on selling to organisations rather than to consumers, the form is part of whether they can buy from you at all.
How you will get out
The least considered factor. A company can be sold, transferred in shares, or taken on by a partner. A sole trader’s business largely cannot — what exists is a set of assets and relationships tied to a person.
Closing differs too. Winding up a company is a formal process with a timetable and tax clearance; a sole trader’s deregistration is simpler. If the venture is genuinely a trial, that asymmetry is worth weighing.
The practical answer
For most ventures with employees, external customers or any expectation of growth, a limited company is the sensible default, and the administrative overhead is smaller than its reputation suggests. Sole trader status suits genuinely small, personal, low-risk activity.
What rarely works is choosing the cheap form now and converting later under time pressure, usually because a customer or a bank has just asked.