Sole trader vs limited company: when the switch makes financial sense

The question comes up for every freelancer eventually: would I pay less tax as a limited company?

Probably yes, above a certain income level. The longer answer includes the cost of getting there.

Why a limited company can reduce your tax bill

As a sole trader, all your profit is taxed as personal income. Above the higher rate threshold — roughly £50,000 in the UK — you’re paying 40% on every additional pound earned.

A limited company is a separate legal entity. It pays corporation tax (19–25% in the UK depending on profits), not income tax. You extract money as a combination of salary and dividends. Dividends are taxed at a lower rate than salary above the personal allowance.

The saving comes from the gap between corporation tax plus dividend tax versus the income tax you’d pay as a sole trader on the same profit.

At £80,000 profit, the annual saving is typically £3,000 to £6,000 depending on how you structure salary and dividends. At £50,000, it’s closer to £1,000 to £2,000. Below £40,000, the numbers rarely justify the switch.

The structure is similar across Western Europe: France has SASU vs micro-entrepreneur, Germany has GmbH vs Einzelunternehmer, Spain has SL vs autónomo. The tax gap exists in all of them. The income threshold varies.

The overhead people underestimate

A limited company requires an accountant. Not optional.

You need annual accounts, corporation tax returns, confirmation statements, payroll if you pay yourself a salary, and VAT returns if you’re registered. A sole trader can manage with basic bookkeeping software and an annual self-assessment. A limited company cannot.

Accountant fees for a simple limited company: £1,000 to £2,500 per year in the UK. A French SASU: similar range. A Spanish SL: gestores typically charge €80 to €200/month.

Add the time overhead: directors’ formalities, stricter record-keeping, more complex expense tracking. That’s on top of the real overhead already embedded in freelance work.

The net saving at lower income levels shrinks once you subtract accountant fees and value your time. A £2,000 tax saving minus £1,500 in fees minus 10 hours of your time at your effective rate — the math often doesn’t work below £60,000.

When the switch makes sense

As a rough threshold: if your annual profit consistently exceeds £60,000 to £70,000 (or the equivalent), a limited company starts generating clear net savings. Below that, the overhead typically eats the tax difference. Above it, the structure pays for itself.

Two other reasons to incorporate regardless of income:

Liability protection. As a sole trader, you’re personally liable for business debts. A limited company separates your personal assets from the business. If you take on contracts with significant financial exposure, this matters.

Client requirements. Some corporate clients have policies against contracting with sole traders. Rarer than it used to be, but it exists.

Neither is a tax argument. Don’t let them substitute for one if the numbers don’t support the switch.

The calculation you need to run first

Before the structure question, you need to know your actual annual profit: total invoiced revenue minus genuine business expenses.

Most freelancers have a rough sense of revenue but have never calculated the effective tax on it. The comparison requires real numbers. Estimated revenue produces estimated conclusions — which is how people make this decision based on a single conversation rather than actual data.

Provisioning correctly for tax is easier once you’re working from accurate revenue figures. The same accuracy matters here: you’re trying to know whether the tax gap at your specific income level is large enough to justify the structural overhead.

If your calendar events are tagged by client and billing status, total invoiced revenue for the year is a five-second query. The decision either makes itself or it doesn’t.

Timescanner shows your total invoiced revenue by client and period from your calendar events. The number you need to run this calculation is already in your calendar. Works with any iCal-compatible calendar.