If you’re trading as a sole trader and doing well, this question turns up eventually: should you go limited? There’s no single right answer. Plenty of successful businesses stay sole traders for years. Plenty of others incorporate in their first six months. What actually matters is understanding what changes and what doesn’t, so you’re deciding on the facts rather than on what a mate down the pub told you last week.
The core difference: one legal identity or two
As a sole trader, you and the business are the same legal person. There’s no separation. The business’s debts are your debts, and its profits are your income, taxed as such.
A limited company is a separate legal entity. It owns the profits, it owes the debts, and you’re paid out of it, either as a director’s salary, as dividends, or both. That separation is the whole point of incorporating, and it’s where most of the practical differences come from.
How the money actually works
As a sole trader, you pay Income Tax and Class 4 National Insurance on your profits, reported once a year through Self Assessment. For the 2026/27 tax year, Income Tax is 20% up to £50,270, 40% up to £125,140, and 45% above that, on top of your personal allowance.
A limited company pays Corporation Tax on its profits instead: 19% on profits up to £50,000, 25% above £250,000, with marginal relief tapering the rate in between. You then take money out as salary (taxed like normal employment) or as dividends, which have their own allowance and rates, currently a £500 dividend allowance for 2026/27 before dividend tax applies.
Whether that combination works out better than staying a sole trader depends on how much you earn, how much you actually need to draw out versus leave in the company, and your personal circumstances. It’s genuinely not the same answer for everyone, and these figures get reviewed at every Budget, so treat them as this year’s picture rather than a permanent one. A quick chat with an accountant who can run your actual numbers (Digitax’s tax service does exactly this) tells you far more than a rule of thumb ever will.
The admin you're signing up for
Sole trader filing is simple: one Self Assessment return a year, reasonably light record keeping.
A limited company means more of it. You’ll file a Confirmation Statement and annual accounts with Companies House every year, plus a separate Corporation Tax return with HMRC. Bookkeeping needs to be tighter, because company and personal money genuinely are separate now, not just separate in theory. If you start paying yourself a salary, that means running payroll too.
None of this is complicated once it’s set up properly. It’s just more than a lot of people expect when they picture going limited.
What doesn't change either way
A few things people assume are tied to company structure, but aren’t. The VAT registration threshold is the same whether you’re a sole trader or a limited company; it’s based on your turnover, not your legal structure, so VAT registration is a question you’ll face either way once you’re close to it. You still need to keep proper records either way. And HMRC deadlines don’t get softer just because you’ve incorporated.
Liability: what's actually at risk
This is usually the headline reason people incorporate. As a sole trader, there’s no line between business debts and personal assets; if the business can’t pay, that comes back to you. A limited company generally limits your liability to what you’ve put into the business.
Worth knowing before you assume this solves everything: banks and landlords often ask directors of small, new companies for a personal guarantee anyway, particularly on loans or leases. Limited liability is real protection, but it isn’t a blanket one, and it’s worth understanding where the gaps are before you rely on it.
When people usually make the switch
There’s no universal trigger point, but a few signals come up often: profit consistently running ahead of what you need to live on, wanting to bring in a business partner or investor with a formal shareholding, a client or contract that specifically requires you to invoice as a limited company, or simply wanting the liability separation for peace of mind. None of these guarantee incorporating is right for you specifically. They’re just the questions worth asking yourself before you decide either way.
Making the move
If the numbers and the admin both point toward incorporating, the next step is registering with Companies House properly, which is where mistakes tend to cost the most time.
Digitax's company registration service handles the filing, checks the details Companies House actually cares about, and talks you through what changes for you personally once you switch.
If you're weighing this up and want it worked through with your actual figures rather than general ranges, book a free consultation with Digitax.
