Sole Trader or Limited Company? Choosing a Structure for Your Private Practice

For most UK allied health practitioners, sole trader is the right structure until sustained annual profit reaches around £50,000, at which point a limited company starts to pay for itself.

That threshold moved in April 2026, and most of the advice online has not caught up. Two changes landed at once, and they push in opposite directions.

This is general information, not tax advice. The figures are 2026/27 and they change every April.

Does a limited company protect me from clinical negligence claims?

Everyone leads with tax. Start somewhere more important.

As a sole trader, you and the business are the same legal person. Business debts are your debts. If the practice cannot pay, your personal assets are exposed.

A limited company is a separate legal person. It owns its debts. If it fails, your loss is generally limited to what you put in, unless you have given a personal guarantee, which landlords and lenders often ask for and which quietly undoes the protection.

For a clinician, though, the liability question is narrower than it first appears. Incorporating does not shield you from clinical negligence. You treated the patient, and a claim follows you personally regardless of what is on the letterhead. That is what professional indemnity insurance is for, and you need it either way.

So the liability argument is real, but it is about commercial risk: a lease you cannot get out of, equipment finance, staff you have to make redundant. A solo practitioner renting a room by the hour has very little of that. A clinic with three staff and a five-year lease has quite a lot.

The tax arithmetic in 2026/27

As a sole trader you pay income tax on profit at the normal rates, plus Class 4 National Insurance at 6% on profits between £12,570 and £50,270 and 2% above that. Profit is profit whether you spend it or not.

As a limited company the company pays corporation tax at 19% on profits up to £50,000, rising to 25% above £250,000, with marginal relief between the two producing an effective rate of about 26.5%. You then extract money, usually as a small salary plus dividends, and pay personal tax on the dividends.

The dividend rates are where 2026 bites.

Dividend tax band	2025/26	2026/27
Basic rate	8.75%	10.75%
Higher rate	33.75%	35.75%
Additional rate	39.35%	39.35%

Announced at the Autumn 2025 Budget and effective 6 April 2026. That is roughly £20 more tax per £1,000 of dividends. The dividend allowance stays at a token £500.

The effect is that the classic incorporation play, low salary plus dividends to sidestep National Insurance, still works but yields less than it did. On profits around £50,000 the two structures now land within a few hundred pounds of each other once you account for accountancy fees. The genuine advantage opens up in a band around £55,000 to £60,000 of profit and widens above it.

Below about £50,000 of sustained profit, incorporating is usually paperwork in exchange for very little.

The change nobody saw coming: MTD

The second April 2026 change cuts the other way, and it is the one practitioners are not planning for.

Making Tax Digital for Income Tax became mandatory for sole traders with income over £50,000 from April 2026. It extends to over £30,000 in April 2027 and over £20,000 in April 2028.

What it means in practice: no more single annual Self Assessment. You keep digital records and file quarterly updates plus a year-end return through MTD-compatible software. Miss a deadline and you get a penalty point; four points triggers a £200 fine, with another £200 for each subsequent miss. There is a grace period on late quarterly updates in your first mandated year.

The reason this matters to the structure question is that one of the traditional arguments for staying a sole trader was simplicity: one tax return a year, a shoebox of receipts, done. That argument is weakening. If you are going to keep digital records and file quarterly anyway, the administrative gap between sole trader and limited company is narrower than it was.

It does not flip the answer on its own. It does mean "I will incorporate later when the admin justifies it" is a weaker plan than it used to be, because the admin is arriving regardless.

Which structure should I choose?

Stay a sole trader if:

Your profit is comfortably under £50,000 and you are not expecting a jump
You are working mobile, or renting a room by the hour, with no lease and no staff
You want every pound available to you personally without thinking about extraction
You are testing whether private practice works for you at all

Incorporate if:

Sustained profit is above roughly £50,000 to £55,000, and you do not need to draw all of it
You have signed a lease, taken on staff, or bought equipment on finance
You want to retain profit in the business to fund growth, which is genuinely tax-efficient because retained profit only pays corporation tax
You are building something you might one day sell, since selling a company is cleaner than selling a sole trade

The word doing the work in the first bullet is sustained. One good year is not a trend, and incorporating for a spike you do not repeat leaves you with a company to run and a set of filing obligations you did not need.

Can I switch from sole trader to limited company later?

This is the reassurance most practitioners want and rarely get, because it makes the decision feel less final than it is.

Sole trader to limited company is a normal, well-trodden transition. You incorporate, transfer the business, and carry on. There is a process for moving goodwill and assets across, and an accountant does it routinely. Nobody is stuck.

Going the other way, closing a company and reverting to sole trader, is more fiddly but still perfectly possible.

So start with what suits the practice you have now, not the one you might have in five years. Most practitioners are better served by beginning as a sole trader, getting the diary full, and revisiting the question once there is a real profit figure to run the numbers on.

Five things specific to clinicians

1. Your registration stays personal. HCPC, GOsC, GCC and the rest register you, not your company. Incorporating changes nothing about your professional obligations or your right to practise.

2. Check your indemnity covers the structure. Some policies are written for an individual practitioner and need adjusting if the contracting party becomes a company. Tell your insurer; it is usually a phone call.

3. Insurer and referrer contracts may need reissuing. If you are recognised by Bupa, AXA or Vitality, or hold contracts with clubs, schools or case managers, those are typically with a named entity. Incorporating means paperwork with each of them.

4. VAT is a separate question and it does not follow the structure. Whether your services are exempt depends on your professional register, not on whether you are a company. Physiotherapy, podiatry, dietetics and other HCPC-registered services are generally exempt; counselling and psychotherapy currently are not.

5. Keep clinical records separate from business records. Patient data is Article 9 special category data with its own obligations regardless of structure. Your accounting software is not a clinical system, and your clinical system is not accounting. Atlacare handles the patient and invoicing side; your bookkeeping lives with your accountant.

Before you decide

Work out your actual expected profit for the next twelve months, not your turnover. Then get an accountant to run both structures on that number, which is an hour of their time and the only version of this article that is about you specifically. Our guide to what it costs to set up in year one covers what that hour tends to cost.

Figures are for the 2026/27 UK tax year and change every April. This is general information about business structure, not tax or legal advice; take advice on your own circumstances before deciding.

Sources: HMRC corporation tax and dividend rates for 2026/27, as confirmed at the Autumn 2025 Budget. Making Tax Digital for Income Tax, GOV.UK.