UK Dental Company Formations: The Incorporation Boom, and the March Spike Behind It

The headline: dental incorporations are up 139% in a decade

New UK dental company formations reached 2,452 in the trailing twelve months to April 2026, up 15.3% on the same period a year earlier.^[1] That is not a one-year jump. It is the latest point on a decade-long climb. Annual incorporations under SIC code 86230, the code for general dental practice activities, rose from 950 in 2016 to 2,272 in 2025, an increase of 139% over the decade.^[1]

These are gross figures from the Companies House register, which matters for how you read them. A company that has since been dissolved still counts in the year it was formed, so the trend carries no survivorship bias: it reflects the genuine flow of new dental companies being created, not a net stock adjusted for closures. The direction is unambiguous. More dentists are choosing to trade through a limited company than at any point in the past ten years.

This article tracks the trend, explains the tax logic driving both the long climb and the striking seasonal pattern inside it, and sets out what it means for a dentist weighing incorporation now. The full monthly and annual series, with a downloadable CSV, sits in our Dental Company Formation Index.^[1]

The decade of growth

The annual series tells a clear story. From 950 formations in 2016, dental incorporations climbed steadily to 1,363 by 2019, dipped to 1,171 in the pandemic-disrupted year of 2020, then accelerated sharply: 1,599 in 2021, 1,902 in 2022, 2,002 in 2023, 2,178 in 2024, and 2,272 in 2025.^[1] The post-2020 surge reflects both a broad national rise in company formation and a growing awareness among dentists of the tax advantages of operating through a limited company.

The trailing-twelve-month figure of 2,452 to April 2026 sits above the 2025 calendar-year total, which indicates the pace has continued into 2026 rather than plateauing. On the monthly series, the single largest month on record is March 2026, with 306 dental companies incorporated, comfortably ahead of any prior month.^[1] That March peak is not a coincidence, and it is the most revealing feature of the whole dataset.

The March spike: tax-year timing in the data

Averaged across the full years from 2016 to 2025, March stands well above every other month for new dental incorporations, and April falls back sharply straight afterwards.^[1] The pattern repeats every year. It is one of the cleanest examples of tax-driven behaviour visible in public company data.

The mechanism is the 6 April tax-year boundary. A dentist who incorporates before 6 April can open the new company's accounting period at the start of the new tax year. That avoids an awkward split-year calculation, keeps the company's first accounting period cleanly aligned with the personal tax year, and captures a full year of company-level tax treatment from day one rather than a stub period. The incentive is strong enough to concentrate a visible rush of incorporations into March, which then drops away in April once the pre-year-end window closes. December, by contrast, is the seasonal low, as few people set up companies over the holiday period.

The practical lesson for a dentist planning to incorporate is that timing has a genuine effect. Aligning the company's start with the tax year is not the only consideration, but the fact that thousands of dentists cluster their incorporations into March each year shows that professional advisers routinely factor it in.

Why the boom happened: the tax logic

The decade-long rise in dental incorporations is, at its core, a tax-efficiency story, though it is not the whole story. A dental limited company pays Corporation Tax on its profits, at 19% on profits up to £50,000, 25% on profits above £250,000, and a marginal effective rate of up to 26.5% in between. The owner then extracts profit through a combination of salary and dividends. For a higher-earning dentist, that salary-plus-dividend mix has historically produced a lower overall tax and National Insurance bill than being taxed on the full profit as a sole trader, where income tax and Class 4 NI apply to everything above the personal allowance.

Beyond pure extraction efficiency, three structural drivers have added to the flow of new companies:

• New practice ownership. Associates stepping up to become principals frequently set up a company to hold the practice, which registers as a new SIC 86230 incorporation.
• Acquisitions through holding structures. Practice purchases are often structured through a limited company or a holding company, each of which appears in the formation data.
• Retained earnings. Where a dentist does not need to draw all of the profit, retaining earnings inside the company at Corporation Tax rates, rather than paying higher-rate income tax on drawings, can be materially more efficient over time.

The 2026 wrinkle: the dividend rate rise

The incorporation case is not static, and 2026 changed one of its key variables. From 6 April 2026, dividend tax rates rose under Finance Act 2026 to 10.75% at the basic rate, 35.75% at the higher rate, and 39.35% at the additional rate.^[2] Because the salary-plus-dividend route depends heavily on the dividend rate, a higher rate narrows the take-home advantage of incorporating compared with earlier years.

That does not reverse the trend, and the data through April 2026 shows formations still rising. But it does mean the decision is finer than it was. For a higher-earning principal who retains profit in the company, incorporation can still be clearly worthwhile. For an associate on more modest profits who intends to draw everything each year, the post-2026 numbers can be close enough that the answer flips on the individual figures. We work through the updated comparison in our guide on whether dental incorporation is still worth it after the 2026 dividend rise, and the mechanics of the extraction mix in our salary and dividend split guide for 2026/27.

What the trend means if you are deciding now

The formation data is a useful barometer of what the profession is doing, but it is not advice for your own position. Two dentists with the same headline profit can reach opposite conclusions on incorporation depending on how much they need to draw, their NHS Pension situation, and their plans for the practice.

Three points matter most when you translate the trend into a personal decision:

• Model your own figures. The advantage of incorporating depends on your profit level, how much you draw versus retain, and the 2026/27 dividend and Corporation Tax rates. A general trend of rising incorporations does not tell you whether it is right for you.
• Account for the NHS Pension. For NHS and mixed practitioners, incorporation interacts with NHS Pension access and the employer superannuation cost, which can materially change the comparison. This is a frequent reason the arithmetic does not favour incorporation even when the headline tax rates suggest it would.
• Consider the running cost and admin. A limited company brings statutory accounts, Corporation Tax returns, payroll, and Companies House filing obligations. These have a real cost that should be netted off any tax saving before you conclude incorporation is worthwhile.

For the broader financial picture of moving to company status, including the setup costs and the ongoing obligations, our guide on Corporation Tax for dental limited companies sets out what a dental company actually has to do once it is formed.

Using the data

The full series behind this article, including every month from mid-2015, the annual totals from 2016 to 2025, the March seasonality pattern, and a CSV download, is published in our Dental Company Formation Index. The data is compiled from Companies House public records under the Open Government Licence v3.0 and is free to cite with attribution to Dental Finance Partners.^[1]

The incorporation boom is real and, on the data through April 2026, still running. Whether you should join it is a question that turns on your own numbers, not on the trend. Our dental accountants build a personal tax comparison, including the NHS Pension and 2026 dividend changes, before recommending a structure.

Sources

1. Dental Finance Partners Dental Company Formation Index, July 2026 data. Trailing-twelve-month formations to April 2026: 2,452, up 15.3% year on year. Annual formations under SIC 86230: 950 in 2016 rising to 2,272 in 2025, an increase of 139.2%. Peak month March 2026 at 306 formations. Available at: /research/dental-company-formation-index. Compiled from Companies House public records under OGL v3.0. Retrieved 2026-07-20.
2. Companies House. Advanced Search API, SIC code 86230 (general dental practice activities). Official UK register of companies at developer.company-information.service.gov.uk. Incorporation counts are gross and exclude the most recent two provisional months. Published under the Open Government Licence v3.0. Dividend tax rates for 2026/27 (10.75% / 35.75% / 39.35%) per Finance Act 2026.