What is the difference between EBITDA and normalised EBITDA for a dental practice?

EBITDA is the reported earnings before interest, tax, depreciation, and amortisation, taken directly from the practice's profit and loss account. Normalised EBITDA adjusts that figure to remove the current owner's personal expenses, non-recurring costs, and above-market remuneration. It reflects what a new owner could expect to earn from the practice. The difference can be 20-40% or more, depending on how the owner has structured their affairs.

Should I add back my own salary when calculating normalised EBITDA?

Yes, you add back the owner's total remuneration (salary, employer NI, pension contributions, and benefits-in-kind). But you must then deduct a market-rate replacement cost for the functions the owner performed. If the owner worked clinically, deduct an associate cost for those sessions. If they managed the practice, deduct a practice manager salary. The net adjustment is the add-back minus the replacement cost.

Can I add back private motor expenses in full?

You add back the total motor expense claimed, but you then deduct a reasonable estimate of the business-only portion. If the owner claimed £10,000 of motor expenses and 60% was business, you add back £10,000 and deduct £6,000, giving a net add-back of £4,000. The buyer will want to see that the practice genuinely incurred business mileage. Keep a mileage log to support the business proportion.

How does the NHS/private mix affect the EBITDA multiple?

Private practices typically command higher EBITDA multiples than NHS-heavy practices because private income is less regulated, has higher margins, and is not subject to UDA contract risks. A mixed practice with 60% private income might achieve a multiple of 1.0-1.4x normalised EBITDA, while an 80% NHS practice might achieve 0.6-1.0x. The exact multiple depends on the practice's location, patient demographics, and growth history.

Practice Finance

How Do You Normalise EBITDA for a Dental Practice Valuation?

18 May 2026•Dental Finance Partners Editorial Team•9 min read

EBITDA normalisation adjusts a dental practice's reported profit to reflect its true sustainable earnings. This guide explains the common adjustments for UK practices, including owner remuneration, non-recurring costs, and private-benefit expenses, with worked examples for associates and principals.

What Does EBITDA Normalisation Mean for a Dental Practice?

EBITDA stands for earnings before interest, tax, depreciation, and amortisation. It is a measure of a dental practice's operating profitability before the effects of financing decisions, tax structures, and non-cash accounting charges. Normalisation is the process of adjusting that EBITDA figure to remove one-off items, non-operating costs, and expenses that reflect the current owner's personal choices rather than the practice's true earning capacity.

When you sell a dental practice, a buyer or their accountant will not take your reported net profit at face value. They will reconstruct the profit and loss account to show what a new owner could expect to earn. That reconstructed figure is the normalised EBITDA, and it forms the basis of the practice valuation. For a UK dental practice, the difference between reported profit and normalised EBITDA can be 20-40% or more, depending on how the current owner has structured their remuneration and expenses.

This guide explains the specific adjustments that apply to UK dental practices, with worked examples for single-handed principals, partnerships, and multi-site groups. If you are preparing for a sale or simply want to understand what your practice is worth, these are the adjustments you need to know.

Why Reported Profit Misleads in Dental Practice Valuations

A typical dental practice profit and loss account shows the net profit after deducting all expenses, including the owner's salary, pension contributions, motor expenses, and professional fees. That reported figure is not a reliable basis for valuation because it reflects the current owner's personal tax planning and lifestyle choices, not the practice's sustainable earning power.

Consider a single-handed principal who takes a low salary of £12,570 and extracts the rest of their profit as dividends. Their company's reported profit after director remuneration might be £150,000. A buyer looking at that figure would think the practice generates £150,000 of profit. But the reality is that the practice actually generates £150,000 plus the director's salary plus employer NI plus pension contributions plus any private-benefit expenses. The normalised EBITDA might be £180,000 or more.

The same principle applies to partnerships. A partner's profit share already includes their personal drawings, but the practice accounts may show a lower figure after deducting partner salaries, private motor expenses, and personal pension contributions. A buyer will add those back to arrive at the true trading profit.

The Key EBITDA Adjustments for UK Dental Practices

Owner Remuneration Normalisation

This is the largest and most common adjustment. The current owner's salary, bonuses, and benefits-in-kind are added back because a new owner would not pay themselves the same amount. The question is: what should replace them?

For a single-handed principal who works full-time clinically, the buyer will typically deduct a market-rate salary for a practice manager or clinical director role if the owner also performs those functions. For a purely clinical role, the buyer might deduct a notional associate cost if the owner's clinical time will be replaced by an associate after the sale. The exact figure depends on the practice's size, location, and whether the owner's role is clinical, managerial, or both.

For a partnership, each partner's profit share is added back in full, and a notional manager's salary is deducted if the partners performed management duties. The remaining surplus represents the practice's goodwill earnings.

For a multi-site group with a non-clinical owner, the owner's director remuneration is added back, and a market-rate CEO or operations director salary is deducted. The difference is the excess profit attributable to the practice's goodwill.

Private-Benefit Expenses

Many dental practice owners run personal expenses through the business. Common examples include motor expenses for vehicles with private use, family mobile phone contracts, personal travel and accommodation, entertaining, and subscriptions that are partly personal. These are added back in full because a new owner would not incur them.

HMRC allows these expenses only if they are wholly and exclusively for the trade. In practice, many owners claim a portion of mixed-use costs. For valuation purposes, the buyer will add back the full amount and then deduct a reasonable estimate of what a new owner would spend on genuinely business-related costs. If the current owner claims £8,000 of motor expenses but only 60% is business, the buyer adds back £8,000 and deducts £4,800 (the business portion), resulting in a net add-back of £3,200.

Non-Recurring Costs

Any one-off costs that are unlikely to repeat after the sale are added back. Examples include legal fees for a previous aborted sale, redundancy payments, refurbishment costs expensed rather than capitalised, and exceptional professional fees for a tax enquiry or pension advice.

Be careful with refurbishment costs. If the practice spent £30,000 on new flooring and decoration in the year before sale, that is a non-recurring cost and should be added back. But if the practice regularly spends £10,000-£15,000 per year on maintenance, that is a recurring cost and should not be added back. The distinction depends on the practice's history.

Pension Contributions

Employer pension contributions for the current owner are added back. A new owner would not continue those contributions. However, if the buyer intends to employ a practice manager or clinical director, they will deduct a market-rate pension contribution for that replacement role.

For partners in an NHS pension scheme, the employer contribution (currently 20.9% for most NHS pensionable earnings) is a genuine practice cost. But if the partner's NHS pensionable earnings exceed the practice's sustainable level, the buyer may adjust the contribution to a lower notional rate.

Depreciation and Amortisation

These are non-cash charges and are always added back to arrive at EBITDA. The normalisation process then considers whether the practice's capital expenditure is sufficient to maintain its assets. If the practice consistently spends less on equipment replacement than the depreciation charge, the buyer may deduct a "maintenance capex" figure from EBITDA to reflect the true cash cost of staying in business.

Interest and Finance Costs

All interest on loans, overdrafts, and hire purchase agreements is added back. The buyer will finance the purchase differently, so the existing finance structure is irrelevant to the valuation.

Worked Example: Single-Handed Principal Practice

Let us take a typical single-handed principal practice with the following reported profit and loss for the year ended 5 April 2025:

Gross fee income: £450,000
Associate costs: £120,000
Staff wages: £85,000
Rent and rates: £30,000
Lab fees: £40,000
Materials and consumables: £25,000
Director salary (owner): £50,000
Employer NI on director: £6,500
Employer pension (owner): £15,000
Motor expenses: £12,000 (estimated 50% private)
Professional fees: £8,000 (includes £3,000 one-off for tax enquiry)
Depreciation: £18,000
Interest: £5,000
Other overheads: £35,000
Reported net profit: £35,500

The normalisation adjustments are as follows:

Add back director salary: +£50,000
Add back employer NI: +£6,500
Add back employer pension: +£15,000
Add back motor expenses (private portion): +£6,000 (50% of £12,000)
Add back one-off professional fees: +£3,000
Add back depreciation: +£18,000
Add back interest: +£5,000
Deduct notional practice manager salary (30 hours/week): -£30,000
Deduct employer NI on notional manager: -£3,750
Deduct notional pension for manager: -£4,500
Deduct business motor expenses (50% of £12,000): -£6,000

Normalised EBITDA: £35,500 + £50,000 + £6,500 + £15,000 + £6,000 + £3,000 + £18,000 + £5,000 - £30,000 - £3,750 - £4,500 - £6,000 = £94,750.

The reported net profit was £35,500. The normalised EBITDA is £94,750. That is a 167% increase. A buyer applying a multiple of, say, 1.2x to the normalised EBITDA would value the practice at £113,700. Using the reported profit would give £42,600. The difference is £71,100, which is material.

Common Mistakes in Dental Practice EBITDA Normalisation

Over-Adjusting Owner Remuneration

Some owners try to inflate EBITDA by adding back their full salary and not deducting any replacement cost. That is unrealistic. A practice that requires the owner to work clinically 30 hours per week needs a replacement dentist or associate after the sale. The buyer will deduct the cost of that replacement. If the owner also performed management duties, a practice manager cost must be deducted too.

The correct approach is to add back the owner's total remuneration package (salary, NI, pension, benefits) and then deduct the market-rate cost of replacing the functions the owner performed. If the owner worked 50% clinically and 50% managerially, deduct 50% of an associate cost plus 50% of a practice manager cost.

Ignoring Maintenance Capex

Depreciation is a non-cash charge and is added back. But dental practices need ongoing investment in chairs, X-ray equipment, compressors, and surgery fit-outs. If the practice's capital expenditure consistently falls below the depreciation charge, the buyer will deduct a maintenance capex figure from EBITDA. A typical range for a dental practice is 2-4% of gross fee income, depending on the age and condition of the equipment.

Double-Counting Associate Costs

If the owner works clinically and their time is replaced by an associate after sale, the associate cost is deducted. But if the practice already employs associates and the owner's clinical time is separate, the associate cost should not be deducted again. The buyer should only deduct the cost of replacing the owner's clinical sessions, not the existing associate costs.

How Buyers Use Normalised EBITDA

Once the normalised EBITDA is calculated, the buyer applies a multiple to arrive at the practice's enterprise value. The multiple depends on the practice's NHS/private mix, location, patient list stability, and growth prospects. For a typical mixed NHS-private practice in England, multiples range from 0.6x to 1.4x normalised EBITDA. Private practices often command higher multiples than NHS-heavy ones.

The buyer then deducts any debt and adds any surplus cash or assets to arrive at the equity value. The goodwill element of the purchase price is the difference between the enterprise value and the tangible asset value (equipment, fixtures, leasehold improvements, working capital).

For a detailed breakdown of how multiples are applied to different practice types, see our goodwill valuation and sale playbook.

Preparing Your Practice for a Valuation

If you are planning to sell within the next two to three years, start preparing your accounts now. Ensure that private-benefit expenses are minimised or eliminated. Keep a clear record of one-off costs. Document the owner's role and hours worked so that a buyer can easily see what functions need replacing.

Work with a dental-specialist accountant who understands normalisation. A general accountant may not know that dental practice motor expenses are commonly adjusted, or that the notional replacement cost for a clinical principal is based on associate rates, not the principal's own earnings.

We offer a free practice health check that includes a preliminary EBITDA normalisation. This gives you a realistic valuation range before you engage a formal valuer.

Tax Implications of the Adjusted EBITDA

The normalised EBITDA is used for valuation, not for tax. The actual sale proceeds are subject to capital gains tax, not income tax. If you sell the practice as a going concern, you may qualify for Business Asset Disposal Relief (BADR), which gives a 14% CGT rate in 2025/26 (rising to 18% from 6 April 2026). The lifetime limit is £1 million of gains.

If the practice is held in a company and you sell the shares, the gain is on the shares, not the underlying goodwill. The normalised EBITDA still drives the share price, but the tax treatment differs. Company sales may also attract Entrepreneurs' Relief (now BADR) if the conditions are met.

For a full analysis of the tax implications of a practice sale, see our practice valuation services page.

Final Thoughts

EBITDA normalisation is not an optional exercise. It is the standard method used by dental practice valuers, lenders, and buyers across the UK. If you present your practice on a reported-profit basis, you will either undervalue it or fail to justify your asking price to an informed buyer.

The key is to be methodical. List every expense that relates to the current owner's personal circumstances. Add them back. Then deduct a realistic replacement cost for the functions the owner performed. The result is a figure that a buyer can use to assess the practice's true earning power.

Every practice is different. The adjustments depend on the owner's role, the practice's size, and the buyer's assumptions. Speak to a dental-specialist accountant who can prepare a normalised EBITDA for your specific situation. Contact our team at Dental Finance Partners for a confidential discussion about your practice's valuation.

Frequently asked questions

What is the difference between EBITDA and normalised EBITDA for a dental practice?: EBITDA is the reported earnings before interest, tax, depreciation, and amortisation, taken directly from the practice's profit and loss account. Normalised EBITDA adjusts that figure to remove the current owner's personal expenses, non-recurring costs, and above-market remuneration. It reflects what a new owner could expect to earn from the practice. The difference can be 20-40% or more, depending on how the owner has structured their affairs.
Should I add back my own salary when calculating normalised EBITDA?: Yes, you add back the owner's total remuneration (salary, employer NI, pension contributions, and benefits-in-kind). But you must then deduct a market-rate replacement cost for the functions the owner performed. If the owner worked clinically, deduct an associate cost for those sessions. If they managed the practice, deduct a practice manager salary. The net adjustment is the add-back minus the replacement cost.
Can I add back private motor expenses in full?: You add back the total motor expense claimed, but you then deduct a reasonable estimate of the business-only portion. If the owner claimed £10,000 of motor expenses and 60% was business, you add back £10,000 and deduct £6,000, giving a net add-back of £4,000. The buyer will want to see that the practice genuinely incurred business mileage. Keep a mileage log to support the business proportion.
How does the NHS/private mix affect the EBITDA multiple?: Private practices typically command higher EBITDA multiples than NHS-heavy practices because private income is less regulated, has higher margins, and is not subject to UDA contract risks. A mixed practice with 60% private income might achieve a multiple of 1.0-1.4x normalised EBITDA, while an 80% NHS practice might achieve 0.6-1.0x. The exact multiple depends on the practice's location, patient demographics, and growth history.

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