The thing nobody tells you upfront.
Incorporating through Companies House costs £50 online and takes about twenty minutes. That part is easy. What people underestimate is everything that comes with it: a separate business bank account, annual accounts filed with Companies House, a confirmation statement every year, Corporation Tax returns with HMRC, and — if you pay yourself a salary — payroll through PAYE. None of that is complicated, but it does mean either learning it yourself or paying an accountant around £600–£1,200 a year to handle it properly. That ongoing cost is the real question. Is what you gain worth that?
For some businesses, absolutely yes. For others, not yet, or not ever. It depends on four things: your profit level, your personal risk exposure, who you are selling to, and how serious you are about building something to sell.
The tax argument — and when it actually stacks up.
The most common reason people are told to go limited is tax efficiency. The idea is that a limited company pays Corporation Tax at 19% (up to £50,000 profit — it rises above that), whereas a sole trader pays Income Tax at 20% or 40% depending on earnings, plus Class 4 National Insurance at 9%. So on paper, limited looks cheaper once you are earning well.
In practice, the tax saving only materialises if you can leave money inside the company and not draw it all out as salary. If you need every penny of your profit to live on, you will pay Dividend Tax on top of Corporation Tax when you take it out, and the net saving shrinks considerably. The calculation that actually matters is: what will I genuinely leave inside the business? If the answer is "nothing — I need it all", the tax argument is weaker than people assume.
I have generally found the crossover point — where the tax saving reliably covers the accountancy cost and then some — sits around £35,000–£40,000 of profit per year for most one-person businesses. Below that, you are often paying an accountant to save yourself less than the accountant costs. Above it, the maths starts working in your favour. Mind you, do talk to an accountant before making this decision based on any article, including mine.
Liability — the reason that actually matters more than tax.
A limited company separates your personal assets from the company's debts. If the business goes wrong, creditors can generally only come after what the company owns, not your house or your savings. As a sole trader, there is no such separation. You and the business are the same legal entity.
For a lot of small trade or service businesses in Kent, the real liability exposure is not financial debt — it is a negligence claim or a contract dispute that goes badly. The moment you are holding a contract with meaningful value, or you are doing work where a mistake could result in a claim, that separation starts to matter. I have seen a sole-trader builder in Deal get dragged into a dispute over a loft conversion that took eighteen months to resolve. He got through it fine, but he was personally exposed the whole time. That is the kind of situation where limited company structure earns its keep.
That said, limited liability is not a magic shield. If you personally guarantee a loan or a lease — and most banks will ask you to, especially early on — the protection is limited to what you have not guaranteed.
Perception — does it actually change how customers treat you?
Sometimes, yes. If you are selling to other businesses, particularly larger companies or public sector organisations, some procurement teams will not contract with a sole trader at all. They want a company number, they want to see Companies House, they want accounts they can look up. I have had this conversation with a Canterbury-based IT contractor who was stuck below a ceiling on the contracts he could bid for until he incorporated. Within three months of having a limited company, he was in conversations that were previously closed to him.
Consumer-facing businesses are different. If you are a personal trainer in Faversham or a freelance photographer covering weddings in the Wye Valley, your customers are not checking Companies House before they book you. For them, the perception argument is close to irrelevant. What matters is your reputation, your reviews, and your Google Business Profile.
There is a middle ground where it is genuinely ambiguous — small retailers, food businesses, local service firms. Honestly, I would not incorporate for perception reasons alone in those cases. Let the tax and liability question drive it.
If you ever want to sell the business, go limited early.
This is the one I wish someone had told me more clearly before my first exit. Selling a sole tradership is complicated because you are selling assets — your tools, your website, your customer list, your contracts — and the buyer has to assume or renegotiate every single one. There is no clean share sale. Buyers generally prefer acquiring a limited company because they can buy shares and the business continues as-is, with contracts and relationships intact.
Across the businesses I have built and sold, every clean exit I have had was from a limited company structure. The messiest one involved a sole-trader element and it added weeks to the process and friction with the buyer's solicitor that was entirely avoidable. If there is any chance you want to build something to sell — even if that feels far off right now — incorporating early gives you a clean foundation. The costs over three or four years are manageable; the complications avoided at exit are not.
The practical steps if you do decide to incorporate.
Register through Companies House directly at companies-house.gov.uk — the £50 online route is perfectly straightforward. You will need a registered address (which can be your accountant's if you prefer not to use your home address — worth knowing for anyone trading from a residential address in Sandwich, Deal, or anywhere else in East Kent). Once you have your company number, open a dedicated business bank account — Starling Business and Tide are both popular for small companies and can be set up in a day or two. Do not mix personal and company money even for a week; it creates a headache at year-end accounts time.
Tell HMRC within three months of starting to trade through the company. Register for Corporation Tax, and if you are going above the VAT threshold of £90,000 in twelve months, register for VAT at the same time. If you are paying yourself a salary — even a small one — you need to register as an employer with HMRC and run payroll, or have your accountant do it. The most common small-company approach is a salary of around £12,570 (to use the personal allowance) plus dividends, but again, get an accountant to set this up properly for your specific situation rather than copy-pasting what you have read online.
When I would tell someone to stay sole trader.
If you are testing an idea, keep it simple. I would not incorporate in the first six months of anything unless you have a very specific reason — a client requiring it, or a liability concern that cannot wait. Sole trader registration is free, takes minutes on the HMRC website, and lets you focus on whether the thing actually works before adding compliance overhead.
Similarly, if you run a very small side income alongside employment — the kind of thing that brings in a few thousand pounds a year from a skill or hobby — the simplicity of self-assessment as a sole trader is probably right. A limited company for £3,000 of annual income is administrative overkill.
And if your accountant is telling you to incorporate purely to save tax, ask them to show you the actual numbers with their fee included. I have seen cases where the projected saving was £400 and the accountancy cost was £800. The answer there is obvious.
A question I always ask in the first mentoring session.
When someone asks me whether they should go limited, the first thing I ask them is: where do you want this business to be in three years? Not a vague aspiration — a specific answer. Staying local, lifestyle income, keeping it personal? Sole trader is probably fine for a while yet. Building a team, winning B2B contracts, or building something you might one day sell? Go limited now and get the structure right from the start. Most of the time, that one question settles it.