A company changes how your profit is taxed and when you take it. That is the whole financial case.

As a sole trader, you pay income tax and National Insurance on everything the business earns, whether the money stays in the account or not. Growth and tax move together.

A company pays corporation tax on its profit first. HMRC publishes the rates: 19% on profits up to £50,000, 25% on profits over £250,000, with marginal relief in between. You can read the current position on gov.uk.

After that, you decide what to draw and when. Salary, dividends, employer pension contributions, and profit left behind for a quieter quarter.

For a consultant billing high invoice values with few costs, that control is where most of the benefit sits. A year where you buy a house and a year where you take a sabbatical can be taxed differently, on purpose.

There is a second reason that has nothing to do with tax. Some agencies and larger clients will only contract with a company. If that is blocking work, the decision has already been made for you.

Timing matters more than most people are told. The answer turns on profit, and on how much of that profit you actually need to spend.

We use around £150,000 of turnover as our own working threshold for sole traders, and we say plainly that it is our rule of thumb rather than any statutory figure. Below that, and with every penny going into the household, the gap between the two structures often does not cover the extra work a company creates.

The consultants who gain most share a pattern. Profit comfortably clears what they draw. Costs are low, so there is real profit to sit on. Income has settled into something predictable rather than one large contract that may not repeat.

If your income is lumpy and you spend it all as it arrives, a company gives you administration without much reward. We have told people that, and lost the engagement, because the alternative is charging a monthly fee for a structure that does nothing for them.

The sole trader vs limited company calculator guide walks through the comparison on your own figures.

A limited company does not settle your employment status, and consultants with one long-standing client need to know that before they form one.

If you have worked for the same client for three years, sit in their meetings, use their equipment and take direction from their managers, the company wrapper changes very little. HMRC looks at how the relationship works in practice.

Where the end client is a medium or large business in the private sector, that client decides your status and issues a determination. Where they are a small company, the responsibility for assessing it sits with you.

None of this makes incorporating wrong. Plenty of our contractor clients run genuine businesses with several clients, their own insurance, their own substitution rights and their own commercial risk.

It does mean the conversation has to happen before the company is formed rather than after the first contract is signed. The consultants who get caught out are usually the ones who set up a company on a friend’s advice and never had their working arrangements looked at by anyone.

HMRC’s guidance on off-payroll working is the place to start.

Incorporating replaces one annual tax return with a running set of obligations. Owners deserve to see that list before they commit.

• Year-end accounts filed at Companies House, and a CT600 filed with HMRC.
• A confirmation statement every year.
• Corporation tax paid nine months and a day after your year end.
• Payroll run and reported in real time if you take a salary.
• Dividends only from profit that exists, with paperwork behind each one.
• Your own self assessment, still due every January.

There is also a VAT decision sitting alongside all of it. A consultant whose costs are overseas software and reverse-charge services has almost nothing to reclaim, which changes which scheme suits them. One procurement consultant who joined us was on the standard scheme with an empty box 4. We moved him to the flat rate scheme and his VAT bill fell every quarter, on the same turnover.

None of this is difficult once it has a routine. It does need someone who tells you the corporation tax figure before the bill lands rather than the week it is due.

We will not answer the incorporation question in the abstract, because the answer moves with your figures. So we build the comparison first.

That means last year’s profit and this year’s run rate, what you actually drew from the business, your household commitments, your pension position, and whether the work comes from one client or several. Then we model the two structures side by side, including the corporation tax, the salary and dividend split, and the tax you would personally pay on what you take out.

Sometimes the gap is large enough that the decision makes itself. Sometimes it is small, and we say so, and you stay as you are for another year.

Where incorporation is the obvious move, we handle the formation, the VAT registration and scheme choice, the payroll set-up and the transfer of the trade. After that you get a corporation tax and dividend forecast a month before the bill lands, so the money is there and the decision about drawings is yours.

You can see the detail in the set-up review explained.