The Tax Implications of Buying and Selling a Dental Practice

Buying or selling a dental practice is one of the largest financial transactions most dentists will ever be involved in. The tax consequences can be very substantial, and unlike most day-to-day financial decisions, the choices made early in any transaction largely determine the final outcome. Leave planning until after a buyer or seller has been found and most of the useful options will already be gone.

This article covers the main tax areas in dental practice transactions. For the broader process of buying or selling, including due diligence, valuations, deal structure, and finding a buyer, the service pages cover those areas in depth.

For the full picture across tax, payroll and compliance, see the complete guide to dental accounting and tax.

What this article covers

• The asset versus share sale decision, the most consequential tax choice in most dental practice transactions.
• Capital Gains Tax and Business Asset Disposal Relief, including what the BADR rate difference actually means financially.
• Earn-out arrangements and how they are taxed depending on the seller’s post-sale role.
• Goodwill: how it is valued and how it is taxed.
• Stamp Duty Land Tax on property and what buyers need to think about.
• Getting the business structure right before a sale process begins.
• Due diligence and avoiding inherited tax liabilities when buying.
• NHS contract transfer considerations.

Structure first: what happens before any sale can begin

Natasha Gnanapragasam, Director of Operations, Accountancy and Tax at Samera, on what the firm does the moment a practice owner comes to them planning a sale:

“The first thing we look into is the structure. If they don’t have a proper structure before they sell the practice, we recommend they put a proper structure in place first. That step has to happen before the sale process begins, not during it. Most of the tax planning opportunities are connected to having the right structure well ahead of any transaction.”

Natasha Gnanapragasam
Director of Operations

Getting the structure itself right, sole trader, partnership, or limited company, is covered in full in our guide to choosing the right business structure.

Asset sale versus share sale: the most important decision

The single most consequential tax decision in most dental practice transactions is whether the deal is structured as an asset sale or a share sale. The two structures produce completely different tax outcomes for both buyer and seller.

Asset sale

In an asset sale, specific assets transfer from seller to buyer: goodwill, the patient list, clinical equipment, the NHS contract where transferable, and the lease or freehold on the premises. For the seller where the practice is a limited company, the proceeds sit inside the company, Corporation Tax applies to any gains above book value, and the seller then faces further personal tax when extracting those proceeds. For the buyer, assets are acquired at market value, creating a fresh cost base for capital allowances and a clean slate without inheriting the company’s history.

Share sale

In a share sale, the buyer purchases the shares in the company that owns the practice. Nothing changes within the company itself. For the seller, the gain in share value since acquisition is subject to Capital Gains Tax at the individual level, and Business Asset Disposal Relief may apply at a significantly reduced rate. For the buyer, they acquire the company with its full history, including any historic tax positions, liabilities, and regulatory matters.

Which structure works better for each party

Sellers usually prefer a share sale because CGT at the individual level, potentially with BADR, is typically far lower than Corporation Tax inside the company followed by further personal tax on extraction.

Buyers often prefer an asset sale because they acquire specific assets without inheriting the company’s historic liabilities.
The final structure almost always involves negotiation. Understanding each party’s tax position before that negotiation begins produces a better outcome for both sides.

Capital Gains Tax and Business Asset Disposal Relief

When CGT applies

CGT arises when assets or shares that have increased in value are sold. For dental practice sellers, this typically means goodwill in an asset sale or shares in a share sale. The gain is the proceeds minus the original cost, after deducting allowable acquisition and disposal costs.

What Business Asset Disposal Relief actually saves

BADR reduces the CGT rate on qualifying business disposals. Natasha on what the financial difference between qualifying and not qualifying actually looks like:

“When BADR applies, it will be 18%. But if it hasn’t been applied, they would pay 24%, the standard CGT rate. That is a very significant difference, and it is why the structure and BADR eligibility need to be confirmed well before any sale is agreed. You cannot go back and restructure once heads of terms are signed.”

Natasha Gnanapragasam
Director of Operations

The BADR rate and qualifying conditions have changed in recent years and further changes are scheduled. Always verify the current position on gov.uk before finalising any sale planning.

Business Asset Disposal Relief: gov.uk

Capital Gains Tax rates: gov.uk

Pre-sale CGT planning

• Confirm BADR eligibility and that qualifying conditions will be maintained through to the disposal date.
• Review the company or group structure well before any buyer conversation begins.
• Plan pre-sale pension contributions and dividend extraction carefully.
• Think about which tax year the disposal falls into, since timing can affect the bill.
• Consider whether deferred payments or an earn-out structure makes commercial sense.

Earn-out arrangements

Earn-out arrangements have become increasingly common in dental practice sales, particularly larger ones and those involving consolidators. Part of the sale price is deferred and paid only if the practice hits agreed performance targets in the period after completion. They can bridge the gap between what a seller believes the practice is worth and what a buyer will commit to paying upfront. From a tax perspective they add meaningful complexity.

How earn-outs are taxed

Where the seller is not staying on after the sale, earn-out payments are generally treated as additional capital consideration and taxed as a capital gain, with BADR potentially applying. The complication is timing: the earn-out right must be valued at completion and taxed in the year of sale. If the actual payout is higher or lower than that valuation, a further gain or loss arises in the year the payment is received.

Where the seller remains as an employee or consultant after the sale, HMRC may treat some or all of the earn-out as employment income rather than capital. Income Tax and National Insurance rather than CGT and BADR. That is a substantially worse outcome for the seller. The structure of the post-completion arrangement and how deferred payments are documented both matter significantly. Get specialist advice before heads of terms are signed, not after.

Goodwill: treatment and valuation

Goodwill is typically the largest single component of a dental practice sale price. It represents the value beyond the tangible assets: the patient base, established reputation, NHS contract, location, and brand.

Tax treatment of goodwill

Goodwill created before April 2002 may receive different tax treatment from goodwill created after that date. For practices that have operated for a long time, this distinction can be commercially significant. Check with your accountant before assuming a standard CGT treatment applies to the entire goodwill value.

How dental practices are valued

Dental practices are typically valued using a multiple of normalised EBITDA or as a proportion of annual turnover. NHS, private, and mixed practices attract different multiples and the state of the market at the time of sale also matters. A supportable and realistic goodwill valuation matters not just for the transaction itself but because HMRC can challenge figures that look unrealistic for the sector.

Stamp Duty Land Tax

SDLT applies when buying freehold or leasehold commercial premises. For non-residential property it is charged in bands: 0% on the first £150,000, 2% on the portion between £150,001 and £250,000, and 5% on anything above that. Check the current bands on gov.uk before completing any property transaction as these can change.

SDLT rates for commercial property: gov.uk

SDLT also arises when moving property between personal ownership and a company, when a long lease is granted or assigned, and when a practice purchase involves the grant of a new lease on surgery premises. Model the cost early in the process. It is sometimes overlooked entirely until the deal is almost done.

Due diligence and preventing inherited tax problems

Natasha on why proper due diligence before completing any acquisition matters:

“Buyers can inherit tax liabilities from a previous owner if they are not careful. That is exactly the reason we ask them to do a proper due diligence. So in such cases, they are not inheriting any tax liabilities they didn’t know about. Due diligence is not optional, it is what separates a clean acquisition from one that comes with problems baked in.”

Natasha Gnanapragasam
Director of Operations

NHS contract considerations

An NHS dental contract is not a freely transferable commercial asset. It requires NHS England approval for any change in the entity holding it. When a practice changes hands, the NHS contract arrangements need careful management to preserve both the contract and the provider’s NHS pension position. Getting this wrong can result in loss of contract income or pension complications that take years to resolve.

NHS contract guidance: NHS England

Getting the tax right takes time you don’t have once a deal is moving

Every decision in this article gets harder to change once a buyer or seller is at the table. Structure needs sorting first. BADR eligibility needs confirming years before completion, not during it. Due diligence needs doing properly before contracts are signed, not after problems surface.

None of this is complicated on its own. What makes it costly is leaving it until a transaction is already underway, at which point most of the good options are already gone. Start the tax conversation as early as the commercial one, and the outcome looks very different from starting it once heads of terms are on the table.

Dental Practice Sales Tax: FAQs

Glossary

• Asset sale – A transaction structure where specific assets (goodwill, equipment, the NHS contract, the lease or freehold) transfer from seller to buyer, rather than the company itself changing hands.
• Share sale – A transaction structure where the buyer purchases the shares in the company that owns the practice, leaving the company and its assets unchanged internally.
• Capital Gains Tax (CGT) – The tax charged on the increase in value of an asset or shareholding between acquisition and disposal.
• Business Asset Disposal Relief (BADR) – A relief that reduces the CGT rate on qualifying business disposals, subject to eligibility conditions and a lifetime limit.
• Earn-out – A deferred portion of the sale price paid only if the practice meets agreed performance targets after completion.
• Goodwill – The value of a practice beyond its tangible assets: patient base, reputation, NHS contract, location, and brand.
• Stamp Duty Land Tax (SDLT) – A tax charged on the purchase of property, including commercial premises bought as part of a practice acquisition.
• Due diligence – The process of investigating a target practice’s finances, contracts, and liabilities before completing a purchase, to avoid inheriting undisclosed problems.
• NHS contract variation – The formal NHS England process required to change the entity holding an NHS dental contract, necessary whenever a practice changes ownership.

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