Why Financial Due Diligence Matters When Buying a Dental Practice
Buying a dental practice is one of the largest financial commitments a dentist will make. The price often runs into six or seven figures, and the success of your investment depends on understanding exactly what you are buying. The due diligence process helps identify the right practice for you [1]. Without it, you risk overpaying for goodwill, inheriting hidden liabilities, or discovering post-completion that the NHS contract terms are not what you expected.
This article sets out a practical financial due diligence checklist for UK dentists. It covers the key areas you need to examine before exchange of contracts: goodwill valuation, NHS contract analysis, TUPE obligations, VAT status, capital allowances, regulatory compliance, and profit sustainability. Use it as a starting point, then work through each item with your dental-specialist accountant and solicitor.
1. Goodwill Valuation: What Are You Actually Paying For?
Goodwill typically represents 60-80% of the total purchase price for a dental practice. The valuation method matters because it determines how much you borrow and how the price is allocated for tax purposes. Factors affecting the value of goodwill must be identified [1].
Common valuation approaches include:
- EBITDA multiple: Typically 0.6-1.4x adjusted EBITDA, depending on NHS/private mix, location, and practice profitability. Private-heavy practices tend to command higher multiples.
- Percentage of fee income: A rule-of-thumb range of 25-60% of gross fees, again varying by type and region.
You need to understand what the seller has included in their EBITDA calculation. Are associate costs correctly accounted for? Are lab fees and materials netted off? Is the seller's own drawings included as a notional salary? A practice that looks profitable on the surface may be less attractive once you adjust for a fair market-rate principal salary.
Also check whether the practice has a high proportion of fee-exempt NHS patients. Buying an NHS practice with many fee-exempt patients may make a future dream of going private difficult [1]. That constraint directly affects the goodwill multiple you should pay.
For a detailed breakdown of valuation methods, see our goodwill valuation and sale playbook.
2. NHS Contract Analysis: UDAs, PDS, and Regional Variations
If the practice holds an NHS General Dental Services (GDS) contract, you need to verify the UDA (Units of Dental Activity) value and volume. UDA rates vary by region and by individual contract. The England average is roughly £25-£35 per UDA, but individual contracts range from £15 to £45+. Do not assume a single national figure.
Key questions to ask:
- What is the exact UDA value per point, and is it fixed or subject to annual review?
- What is the total UDA target, and has the practice consistently met it in recent years?
- Are there any clawback risks or underperformance penalties?
- Does the contract have a break clause or is it rolling?
For Personal Dental Services (PDS) contracts, the structure is different. As far as a PDS contract is concerned, the simplest option is to take advantage of the contractual right to convert to a GDS contract, but this option is only available for dental services (not orthodontic) contracts [2]. If you are buying a PDS practice, discuss conversion options with your solicitor before exchange.
In Scotland, practices operate under the Statement of Dental Remuneration (SDR) item-of-service system, not UDAs. In Wales and Northern Ireland, different contract types apply. Your due diligence must be tailored to the relevant jurisdiction.
Use our NHS UDA value calculator to model the financial impact of different UDA rates and volumes.
3. TUPE Obligations: Staff Contracts and Associate Arrangements
When a practice is being sold the buyer needs to be aware of the TUPE regulations, meaning that current employees' terms of employment will transfer over to the new owner [2]. This includes all employed staff: dental nurses, hygienists, receptionists, practice managers. You inherit their contractual rights, including holiday pay, sick pay, and pension contributions.
Associate dentists are different. Associate dentists' contracts do not automatically transfer to the buyer, and so, if the buyer wants to retain them, then new contracts will need to be drawn up [2]. This gives you flexibility, but also risk. If key associates leave shortly after completion, your practice income could drop significantly.
During due diligence, obtain a full list of all staff and associates, their contract types, length of service, current remuneration, and any outstanding holiday or sick pay liabilities. Factor the cost of potential redundancy or settlement agreements into your financial model.
Following a recent change in legislation, effective since 1 October 2011, agency workers can now be entitled to the same rights as employees [2]. If the practice uses agency locums regularly, check whether they have been engaged on terms that could trigger equal treatment rights.
4. VAT Status: Exempt, Standard-Rated, or Mixed?
Most dental treatment provided by a registered dental professional is exempt from VAT under VATA 1994 Schedule 9 Group 7. This includes both NHS and private treatment. However, purely cosmetic services without a medical purpose can be standard-rated. Tooth whitening is a known borderline case that HMRC scrutinises.
If the practice provides a mix of exempt and standard-rated services, it may be partially exempt for VAT purposes. This affects the practice's ability to recover input VAT on overheads, equipment, and practice improvements. A practice that is fully exempt cannot reclaim VAT on purchases, which adds a hidden cost of 20% to capital expenditure.
Check the practice's recent VAT returns and any partial exemption calculations. If the seller has been recovering VAT on mixed supplies, confirm that HMRC has not challenged the method. Also check whether the practice is registered for VAT voluntarily (if turnover is below the £90,000 threshold) or compulsorily.
For more detail, see our practice accounting services page, which covers VAT planning for dental practices.
5. Capital Allowances: What Can You Claim on Fixtures and Equipment?
Dental chairs, lights, compressors, suction units, autoclaves, X-ray machines (including OPG), and computer equipment typically qualify for capital allowances under the Annual Investment Allowance (AIA), which is £1,000,000 for 2025/26. This means you can deduct the full cost from your taxable profits in the year of purchase.
However, when you buy a practice from a seller who has already claimed capital allowances on the fixtures, you need an election under CAA 2001 s.198 to agree a fixed value for the fixtures. Without this election, HMRC may challenge your capital allowance claims later. Your accountant should review the seller's capital allowance pool history and agree a s.198 election before completion.
Structures and Buildings Allowance (SBA) gives 3% per year straight-line relief on qualifying construction or acquisition costs of practice premises built or acquired after 29 October 2018. If the practice owns its freehold building, check whether SBA has been claimed and whether the purchase price should be apportioned between land, building, and fixtures.
Our practice valuation services include capital allowance analysis as part of the due diligence process.
6. Regulatory Compliance: CQC, GDC, and Performers' List
The buyer will need to register with the CQC, which can take more than 120 days [2]. This is a critical timeline issue. You cannot treat patients under the CQC registration of the seller after completion. You must have your own registration in place before you take over. Start the application process early, ideally before exchange of contracts.
You also need to be on the Performers' List for the relevant NHS area to provide NHS treatment. Joining requires a PIN allocation by NHS England (or the equivalent body in Wales, Scotland, or Northern Ireland). Check the current processing times in your region.
The General Dental Council (GDC) is the UK regulator for dental professionals. Its primary purpose is to protect patient safety and maintain public confidence in the dental professions [3]. Ensure your GDC registration is current and that you have no outstanding fitness to practise issues. The GDC registers dental professionals, sets standards for the dental team, investigates complaints about fitness to practise, and ensures the quality of dental education [3].
If the practice employs dental nurses or hygienists, verify that all are registered with the GDC and that their CPD records are up to date. Non-compliance can lead to enforcement action and reputational damage.
7. Profit Sustainability: Recurring vs One-Off Income
A practice's historical profit and loss accounts tell you what has happened, not what will happen. You need to assess whether the income is sustainable under your ownership.
Key areas to examine:
- Private fee income: Is it growing, flat, or declining? What is the mix of routine check-ups, hygiene, restorative, and cosmetic work? Are there any large corporate or insurance contracts that could be lost on change of ownership?
- NHS income: Is the contract value stable? Are there any outstanding disputes with NHS England about UDA targets or clawbacks?
- Associate dependency: What percentage of total practice income comes from associate dentists? If a key associate leaves, how quickly could you replace them?
- Overhead structure: Are lab fees, materials, rent, and staff costs in line with industry benchmarks? Are there any unusual or non-recurring expenses that have been added back to inflate EBITDA?
Request at least three years of full accounts, plus management accounts for the current year. Your accountant should run a normalised profit calculation that adjusts for the seller's personal drawings, non-business expenses, and any one-off items.
For a structured approach, use our practice purchase financial due diligence guide.
8. Tax Structure: Partnership vs Limited Company
The legal structure you use to buy the practice affects your tax position, borrowing capacity, and exit options. Most single-handed principals buy through a limited company, but partnerships and sole trader structures are also common.
Key tax considerations:
- Corporation tax: A limited company pays 19-25% on profits, depending on profit level. You then extract profits via salary and dividends, each with its own tax and NI consequences.
- Dividend allowance: Only £500 for 2025/26, with dividend tax rates of 8.75% (basic), 33.75% (higher), and 39.35% (additional).
- Employer NI: 15% on earnings above £5,000 per year. Employment Allowance of £10,500 can offset some of this if you employ staff.
- Goodwill amortisation: If you buy goodwill through a company, tax relief is available at 6.5% per year for qualifying goodwill acquired after 1 April 2019. Goodwill purchased between 8 July 2015 and 31 March 2019 generally has no tax relief.
- Section 162 incorporation relief: If you are transferring an existing unincorporated practice into a company, you may defer CGT on goodwill by taking shares instead of cash.
Compare the tax efficiency of different structures using our practice profit extraction calculator.
9. Financing and Affordability: Can You Service the Debt?
Most practice purchases are funded by a combination of personal savings, bank loans, and sometimes vendor finance. Your due diligence should include a realistic cash flow forecast that tests your ability to service the debt.
Key questions:
- What is the expected loan-to-value ratio? Banks typically lend up to 70-80% of the purchase price for a dental practice, but terms vary.
- What interest rate and repayment term are you being offered? Factor in the impact of rising interest rates on your monthly payments.
- What is your projected net income after loan repayments, tax, and pension contributions? Is it enough to cover your living costs and reinvest in the practice?
- Do you have a contingency fund for unexpected capital expenditure, such as equipment replacement or practice refurbishment?
Run sensitivity scenarios: what happens if UDA rates are cut by 5%? What if a key associate leaves and you lose 20% of private income? Your financial model should show that the practice remains viable even in a downside scenario.
Our for practice buyers page provides more resources on financing and affordability.
10. Professional Advisers: Who Should Be on Your Team?
Buying a dental practice is a complex transaction. You need a team of specialists, not generalists. At a minimum, you should engage:
- A dental-specialist accountant to review the financials, tax structure, and capital allowances.
- A solicitor with dental practice experience to handle contracts, NHS transfer, and TUPE.
- A commercial mortgage broker who understands dental practice lending.
- A practice valuation expert if you are negotiating the price.
The cost of professional advice is a fraction of the price you pay for the practice. Skimping on due diligence to save a few thousand pounds can cost you hundreds of thousands later.
For a full list of our services, see Dental Finance Partners services.
Summary Checklist
Use this checklist as a starting point for your due diligence. Work through each item with your accountant and solicitor before exchange of contracts.
- Goodwill valuation method and multiple justified by practice type and region
- NHS contract terms: UDA value, volume, clawback risk, break clauses
- TUPE obligations: staff contracts, holiday pay, pension liabilities
- Associate contracts: terms, notice periods, retention risk
- VAT status: exempt, standard-rated, or mixed; partial exemption method
- Capital allowances: s.198 election, AIA, SBA claims
- CQC registration timeline and Performers' List status
- GDC registration and CPD compliance for all dental professionals
- Normalised profit calculation and sustainability analysis
- Tax structure comparison: limited company vs partnership vs sole trader
- Financing affordability: cash flow forecast and downside scenarios
- Professional adviser team in place
Every practice is different. The checklist above is a guide, not a substitute for tailored professional advice. Speak to a dental-specialist accountant who understands the nuances of NHS contracts, goodwill valuation, and practice finance. They will help you identify risks you might miss and negotiate a price that reflects the true value of the practice.
Contact Dental Finance Partners to discuss your practice purchase plans.
Sources
- bda.org: An overview of the process of buying a dental practice
- nature.com: Top 10 tips for selling your practice | Vital - Nature
- gdc-uk.org: General Dental Council