The sole trader vs limited company question comes up in almost every conversation we have with new business owners. It feels like there should be a simple, definitive answer — and to be fair, for many people there is one. But the right structure for a freelance graphic designer earning £35,000 a year looks very different from the right structure for a contractor billing £90,000 through a single client.

Our take is this: sole trader status is underrated and often discarded too quickly, while incorporation is frequently rushed into because it sounds more professional or because a friend said it saves tax. Sometimes it does. Sometimes it creates more admin and cost than the tax saving justifies. This post sets out the real differences so you can make the call with your eyes open.

As a sole trader, your profits are taxed as personal income through Self Assessment. You pay Income Tax at the standard rates — 20% basic rate, 40% higher rate — and you also pay Class 2 and Class 4 National Insurance on top of that. Class 4 NI sits at 6% on profits between £12,570 and £50,270, and 2% above that (as at 2026-27). It adds up.

A limited company pays Corporation Tax on its profits — currently 19% for profits up to £50,000 and up to 25% above £250,000, with marginal relief in between. As a director-shareholder, you typically pay yourself a small salary (usually around the NI threshold) and draw the rest as dividends. Dividends have their own allowance and are taxed at lower rates than employment income.

On paper, that sounds like an obvious win for incorporation. In practice, the saving depends on profit level, what you actually withdraw from the company, and how much you reinvest. We have seen clients who expected to save thousands a year through a limited company but ended up saving closer to a few hundred once accountancy costs and extra admin were factored in. The tax maths deserves a proper run-through before you decide — a sole trader vs limited company calculator can give you a starting point.

There is a new variable worth knowing about: Making Tax Digital for Income Tax (MTD for IT) began rolling out in April 2026 for sole traders with income above £50,000. If you earn above that threshold, you are now required to maintain digital records and submit quarterly updates to HMRC — four updates per year, plus an End of Period Statement and a Final Declaration. Six submissions per year in total, replacing the single annual Self Assessment return.

The thresholds drop to £30,000 in April 2027 and £20,000 in April 2028, which means MTD will eventually capture the majority of self-employed people.

Limited companies are not affected by MTD for Income Tax — they sit under Corporation Tax rules, which have a separate roadmap. So if you are a sole trader above £50,000 and you were already considering switching to a limited company, the additional compliance burden of MTD is worth factoring into that timing decision.

That said, we would not recommend incorporating purely to dodge MTD obligations. The quarterly reporting cadence is manageable with the right software — Xero, QuickBooks, and FreeAgent all handle it cleanly — and the process becomes routine fairly quickly. It is an extra consideration, not a reason to make a structural change you are not ready for.

The tax conversation dominates most sole trader vs limited company discussions, but the liability question is arguably more important for some business owners.

As a sole trader, there is no legal distinction between you and your business. If a client sues you, or your business runs up debts it cannot pay, your personal assets — your savings, your car, potentially your home — are at risk. That is not scaremongering; it is just the legal reality of trading as an individual.

A limited company is a separate legal entity. In most circumstances, the company’s debts are the company’s problem, not yours personally. Your liability is limited to whatever you have invested in the business. There are exceptions — if you personally guarantee a loan, or if there is evidence of wrongful trading — but the baseline protection is meaningful.

For people in higher-risk sectors, or those doing significant B2B work with large clients, that protection can be worth more than any tax saving. We tend to see this come up most often with trades and construction businesses, where contract values and liability exposure can both be significant.

Rather than a blanket rule, here is how we think about it with clients.

Incorporation tends to make sense when:

• Profits are consistently above £40,000–£50,000 and you do not need to draw everything out of the business each year.
• You are working in a sector with meaningful liability risk and professional indemnity insurance alone does not feel like enough protection.
• You are pitching for larger contracts where clients expect — or require — a limited company counterparty.
• You want to bring in a business partner or investor at some point, which is structurally simpler in a company.

Staying as a sole trader often makes more sense when:

• You are in your first year or two and income is still variable — the fixed costs of running a company are real and ongoing.
• You draw most of your profits out as income anyway, which reduces the tax efficiency gap.
• Your work is lower-risk and you have good professional indemnity cover in place.
• Simplicity and low admin overhead are genuinely important to how you work.

There is no shame in staying sole trader. We work with plenty of successful, established sole traders for whom the structure fits perfectly well.