Limited Company or Stay Solo? The 30-Minute Finance Audit for UK Sole Traders

Going limited can feel like a rite of passage. You have been trading for a while, clients are paying, and someone at a networking event says, 'You really should incorporate.' But a limited company is not a gold star for good behaviour. It is a different legal structure with different tax rules, more admin, and a public footprint. Before you file the forms, spend half an hour on the questions that actually matter.

Why incorporation is not automatically a promotion

A limited company can be the right home for a growing business. It can also add cost and complexity to a one-person operation that was ticking along perfectly well. The trick is to separate the genuine benefits from the vague sense that you are 'supposed' to do it. This audit is not legal or tax advice, but it will help you ask your accountant better questions.

Minutes 0–5: Are you flirting with the VAT threshold?

Start with turnover, not profit. VAT registration is triggered by taxable turnover over a rolling 12-month period. At the time of writing, the threshold is £90,000. If you are close to that line, incorporation will not make VAT disappear. A limited company still registers for VAT when it crosses the threshold.

So ask yourself: is VAT part of the reason you are considering going limited? If yes, pause. If you are under the threshold and likely to stay there, VAT is not a strong reason to incorporate. If you are over it, VAT applies either way. Incorporation might change how you handle the admin, but it does not switch off the liability.

Minutes 5–10: The IR35 question, in plain English

IR35 is the set of rules that can treat a contractor working through their own limited company as an employee for tax purposes. You do not need to become an IR35 expert in ten minutes, but you do need the gist. If you plan to work through your new company for medium or large clients, those clients may assess your status. If your working relationship looks like employment — you take instructions, work set hours, cannot send a substitute — incorporation may not deliver the tax advantage you hoped for.

Small clients are often exempt from making the assessment, but 'small' has a specific meaning. This is exactly the sort of thing to check with an accountant before you assume anything. The point of the audit is not to solve IR35; it is to stop you incorporating on autopilot.

Minutes 10–20: Salary, dividends and the take-home reality

This is where a lot of sole traders get lost. The classic limited company setup involves paying yourself a modest director's salary and taking the rest as dividends. It can be tax-efficient, but it is not a magic money tree. The company pays corporation tax on profits. You pay income tax and National Insurance on salary and dividends according to the rules. There is a dividend allowance, but it is not unlimited.

Get a piece of paper and write down three numbers: your expected annual profit, your current tax bill as a sole trader, and a rough quote for accountancy, payroll and software. Then compare. A limited company usually costs more to run. If the tax saving is smaller than the extra admin and fees, staying solo may be the smarter move. If the gap is meaningful, incorporation deserves a proper conversation.

Minutes 20–25: Privacy and the public register

Companies House is public. Your name, month and year of birth, and a service address appear on the register. There are ways to protect your home address in some circumstances, but it is not a blanket guarantee. If you value privacy — perhaps because you work from home, have a unusual name, or simply do not want your details searchable — factor that in. For some founders, the public register is a non-issue. For others, it is the deciding factor. Neither reaction is wrong.

Minutes 25–30: The three-question gut check

Now answer three questions honestly.

1. Will being a limited company help me win work, satisfy clients, or protect the business as it grows?
2. Can I handle the extra admin and cost without resenting it?
3. Am I comfortable with my details being on a public register?

If you have two strong yeses and one manageable no, keep going. If you are mostly shrugging, wait. Waiting is a valid business decision. You can always incorporate later.

What to do with your answers

Book a short call with an accountant and take your notes. Ask specifically about VAT timing, IR35 for your main clients, the salary and dividend split, and the total annual running cost. Get a fixed quote. Then decide. The goal is not to stay a sole trader forever or to become a limited company as fast as possible. The goal is to choose the structure that fits the business you actually run, not the one you think you should be running.