Most dental principals spend more on the legal side of a sale than the financial side, then wonder why the tax bill ends up larger than expected and the buyer's offer came in lower than the valuation they'd been working with. The goodwill work — valuation, normalisation, tax structure, pre-sale planning — is what determines what you walk away with.
This guide is the playbook. It covers how UK dental practice goodwill is actually valued in 2025/26 (with realistic ranges by region and practice type), the post-April-2019 amortisation rules, the BADR rate change taking effect on 6 April 2026, Section 162 incorporation relief mechanics, and the 24-month pre-sale timeline that captures the planning properly.
How dental practice goodwill is valued in 2025/26
Two methods dominate, sometimes used together.
Earnings-based valuation (EBITDA × multiple)
The dominant method. Normalised EBITDA × a market multiple = practice value. The "normalised" part is critical: see the practice purchase due diligence guide for the full normalisation playbook. The multiple is where the variance sits:
- NHS-heavy single-handed practices in lower-demand regions: roughly 0.6-0.9× normalised EBITDA. Lower demand reflects buyer caution about NHS contract reform exposure and the difficulty of running a single-handed NHS practice without burnout.
- Mixed NHS/private multi-surgery practices in normal-demand regions: roughly 0.9-1.2× normalised EBITDA. The sweet spot for many buyers — NHS underwrites baseline revenue, private offers margin upside.
- Private-focused practices in high-demand regions: roughly 1.1-1.4× normalised EBITDA, sometimes higher for prime locations (Central London, prime South Coast, prestige West Country). High-margin private income with low NHS contract risk commands a premium.
- Corporate acquirer premium: corporate dental groups will sometimes pay above market multiples for practices that fit their consolidation strategy. The strategic value to the corporate (e.g., filling a geographic gap, adding a specific specialty capability) drives the premium.
These ranges are 2025/26 indicative. Actual multiples on specific transactions can sit outside them in either direction.
Revenue-based valuation (percentage of fee income)
Less common, but used as a sense-check or as a primary method for very small or atypical practices. Typically 25-60% of annual fee income, depending on practice type. Less reliable than EBITDA because it ignores margin, but useful for cross-checking.
Hybrid methods
Some valuers (and some corporate buyers) use a hybrid: a multiple of EBITDA for the underlying earning power, plus a separate value for any "embedded options" like an undeveloped specialty service or planning permission for a third surgery. These are uncommon outside corporate deal structures.
Goodwill vs tangible assets: the price split
The total practice price has to be allocated between goodwill (intangible) and tangible assets (chairs, equipment, fixtures, fittings, vehicles if any). The allocation matters for both sides:
- Seller side: goodwill disposal proceeds go to CGT (with potential BADR). Tangible asset disposals each have their own tax treatment — some give rise to capital allowance balancing charges, some to chargeable gains depending on the asset category.
- Buyer side: goodwill acquired post-1 April 2019 receives tax relief at 6.5% per year. Tangible assets typically receive 100% first-year relief under AIA (chairs, X-rays, autoclaves, etc.) or 3% per year SBA (qualifying premises spend post-29 October 2018).
The split is negotiated as part of the deal. A buyer prefers more value allocated to AIA-eligible tangible assets (immediate 100% relief) than to goodwill (15-year amortisation period). A seller's preference depends on the BADR position and the timing relative to the rate change.
Goodwill amortisation: the post-April-2019 rules
Tax relief on goodwill amortisation has changed three times in recent UK history:
- Pre-8 July 2015: tax relief generally available on amortisation over the asset's accounting life
- 8 July 2015 to 31 March 2019: relief withdrawn for goodwill acquired in this window — generally no tax relief on amortisation
- 1 April 2019 onwards: relief reinstated in modified form by Finance Act 2019. Tax relief at 6.5% per year (15-year amortisation period for tax purposes) for goodwill acquired with a qualifying business.
For practice buyers in 2025/26, every acquisition you complete will have goodwill in the post-1-April-2019 regime, so the 6.5% relief is available. The relief is claimed in the corporation tax computation each year. If your acquisition accountant doesn't proactively claim it, you'll lose the relief — there's no automatic relief, you have to elect for it.
For practice owners who acquired pre-1 April 2019, the goodwill in your accounts is either being amortised with no tax relief (the 8 July 2015 to 31 March 2019 window) or with relief at the pre-2015 rate. Both positions are locked in by the acquisition date; you can't retroactively access the post-April-2019 6.5% relief.
BADR: the April 2026 rate change matters
Business Asset Disposal Relief gives a reduced CGT rate on qualifying gains up to a £1m lifetime limit per individual. The rate has changed:
- 2025/26 tax year (6 April 2025 to 5 April 2026): 14% on qualifying gains
- 2026/27 tax year onwards (6 April 2026+): 18% on qualifying gains
The 4 percentage point increase translates directly to additional tax on the same gain. On a £1m qualifying gain (the full lifetime limit), the difference is £40,000 of additional CGT for a 2026/27 disposal vs a 2025/26 disposal.
This creates a real planning question for principals approaching a sale in late 2025 or early 2026. Completing the sale on 5 April 2026 (the last day of 2025/26) vs completing on 6 April 2026 (the first day of 2026/27) is potentially £40,000 different on the tax bill. The rule is that the gain accrues on the date of disposal — typically the contract completion date for a share or asset sale. Trying to engineer the completion date precisely is a real risk because deals slip; relying on a target completion of 31 March 2026 is sensible, but a buffer week or two is sensible too.
BADR eligibility conditions
To qualify for BADR on a dental practice disposal, the seller needs to satisfy the conditions for at least two years before disposal:
- The business being sold (or the shares in a personal company holding it) must be a trading business or trading company throughout the qualifying period
- For a sale of shares: the seller must be an employee or officer of the company, must own at least 5% of the ordinary share capital and voting rights, and must be entitled to at least 5% of the proceeds on a winding-up
- For a sale of an unincorporated trade (sole-trader or partnership): the seller must have been actively running the trade for the qualifying period
This is why we say BADR planning has to start 24 months before sale. If you're going to be a 5%+ shareholder, employee or officer of a personal company for the two years before sale, that has to be in place 24 months out, not in the run-up.
Section 162 incorporation relief
Section 162 TCGA 1992 defers CGT on the transfer of an unincorporated trade to a limited company in exchange for shares. Mechanics:
- The whole business must be transferred (not just part of it)
- The consideration must be wholly or mainly shares in the new company (cash consideration restricts the relief proportionately)
- The CGT that would arise on the transfer of goodwill (and other chargeable assets) is deferred
- The deferred gain is rolled into the base cost of the shares received; when those shares are later disposed of, the deferred gain crystallises
For dental principals, Section 162 has two main use cases:
Pre-sale incorporation to access BADR via share sale
If you're an unincorporated practice (sole trader or partnership) and you're planning a sale in 2-3 years, you can incorporate now using Section 162 to defer the CGT on goodwill into the share base cost. When you later sell the shares (and you've held them for at least two years, you're an employee/officer of the company, and the 5% ownership conditions are met), the share sale qualifies for BADR.
This route works when BADR on a future share sale is more attractive than the alternative (an asset sale from the unincorporated trade where BADR also applies but on different mechanics, and the tangible assets might be treated differently).
Structural cleanup before a sale
Some unincorporated dental practices have grown into structures that are harder for a buyer to acquire cleanly. Incorporation before sale can simplify the structure, allow the principal to bring in a future partner via share allocation, and reset the corporate base. The Section 162 deferral is the mechanism that allows this without a large CGT charge on the way in.
The 24-month pre-sale timeline
Working backwards from a target sale date:
24 months before sale
- First conversation with a dental-specialist accountant about exit planning
- Realistic valuation refresh — what is the practice actually worth today, and what would it be worth in 24 months with optimisation?
- BADR eligibility audit — are you on track to qualify? If not, what needs to change?
- Decision on incorporation route (if unincorporated): Section 162 incorporation now, or asset sale at exit?
18 months before sale
- EBITDA normalisation begins to show in accounts. Spouse salary brought to market rate. Personal expenses removed from P&L. One-off items called out so buyer can see them clearly.
- Associate agreements reviewed: notice periods, fee splits, status-risk audit
- NHS contract documentation organised: full contract, variation letters, recent reconciliations, commissioner correspondence
- Equipment refresh decisions: any major equipment that needs replacing should be replaced now, not left as a buyer's question mark
12 months before sale
- Second year of cleaned-up accounts in progress
- Practice valuation refreshed against current market multiples
- Marketing planning: which broker, which buyer pool, what's the right channel for the right practice type
- Tax planning finalised: structure for the deal, expected BADR position, any final structural moves before listing
6 months before sale
- Two full years of cleaned-up accounts now in the records
- Broker engaged, marketing materials prepared
- Practice listed
- Initial buyer enquiries fielded; longlist narrowed to a shortlist
3 months before sale
- Preferred buyer in due diligence
- Heads of terms agreed
- Lender approval (if buyer is financing) progresses
- Solicitors preparing contract documentation
Completion
- Final accounts and tax position confirmed
- BADR claim prepared for inclusion in the seller's self-assessment for the year of disposal
- Post-completion handover begins
What we'd do if you brought us in pre-sale
Our pre-sale planning engagement typically starts 18-24 months before target exit. The work covers:
- Valuation refresh against current market multiples for your specific practice type and region
- BADR eligibility audit and the structural moves needed to lock it in if it's at risk
- Section 162 incorporation modelling if you're unincorporated and pre-sale incorporation makes sense
- EBITDA normalisation strategy for the 18-month run-in
- Practice-side cleanup priorities (associate agreements, equipment, premises position, accounts presentation)
- Co-ordination with the dental-specialist broker and the dental-specialist solicitor when the time comes
If you're 12-36 months from a target sale, the conversation needs to be happening now. Book a 30-minute scoping call via the form below.