Taxes for Dental Practice Owners: Corporation Tax, VAT, and Capital Allowances

Running a dental practice through a limited company brings better tax efficiency and personal asset protection than operating as a sole trader, but understanding the essential taxes for dental practice owners means getting to grips with a more complex set of obligations – Corporation Tax, VAT, and capital allowances chief among them.

What this article covers

• Corporation Tax: how it works and how practice decisions affect it.
• The director’s loan account: what it is, when it goes wrong, and how to keep it clean.
• VAT in dentistry: the unusual exempt position, what is actually taxable, and partial exemption.
• Capital Gains Tax, Business Asset Disposal Relief, and Stamp Duty Land Tax when buying or selling.
• Capital allowances: the most underused tax relief in dental practice.

Corporation Tax

What it is and how it works

If your practice operates as a limited company, the company pays Corporation Tax on its taxable profits. This includes income from clinical work after deducting allowable expenses, rental income from rooms let to associates, and any gains from selling assets. The UK uses a tiered structure with a lower rate for smaller profits and a higher main rate above a certain threshold, with marginal relief in between. For current rates and thresholds, check the HMRC website.

Corporation Tax rates: gov.uk

How Corporation Tax shapes practice decisions

Salary versus dividends. Most practice owners take a modest salary and draw additional income as dividends. Dividends do not reduce company profits for Corporation Tax purposes, but the combined personal tax on a salary-plus-dividend mix is typically lower than taking everything as salary. Dividend rates can change, which shifts the optimal balance. Review this with your accountant annually.

Dividend Tax rates: gov.uk

Employer pension contributions. Pension contributions the company makes on behalf of directors reduce taxable profits before Corporation Tax is applied and are not taxed as personal income at the point of contribution. In our experience this is one of the most consistently underused reliefs available to practice owners.

Timing of expenditure. Buying equipment or completing qualifying refurbishment before your accounting year-end reduces taxable profits for that period. Worth planning alongside capital allowances strategy.

The director’s loan account

This is the area that catches limited company practice owners off guard most often. Natasha Gnanapragasam, Director of Operations, Accountancy and Tax at Samera, describes the most common problem she encounters:

“The most common issue is an overdrawn director’s loan account balance. Directors borrowing into an overdrawn position, that is what we see most frequently. And it almost always develops without the client realising it has happened, because nobody is watching it in real time.”

Natasha Gnanapragasam
Director of Operations

The director’s loan account records all money that passes between you personally and the company outside of formally declared salary or dividends. When it goes overdrawn, meaning you have taken more out than you have put in, two specific tax problems arise.

First, if the overdrawn balance is not repaid, formally written off, or declared as a dividend within nine months and one day of the company’s accounting year-end, the company pays a tax charge to HMRC on the outstanding amount – known as Section 455 tax. This can be significant for what is essentially a record-keeping issue. If you repay the loan later, you can reclaim the charge, but the cash flow impact in the meantime is real.

Second, if the outstanding loan exceeds £10,000 at any point during the year, it is treated as a benefit in kind. You pay Income Tax on a notional interest charge and the company pays National Insurance on it. Not catastrophic, but an avoidable cost.

The simplest prevention: make sure any money you draw from the company is formally categorised as salary or dividends at the time rather than informally taken and sorted out later. Your accountant should be reviewing the loan account quarterly. If they are not, ask them to start.

VAT: the unusual position dentistry occupies

The dental VAT position is genuinely unusual and is misunderstood more often than it should be. Most clinical dental treatment is exempt from VAT, not zero-rated but exempt. That distinction matters: zero-rated businesses can reclaim input VAT on their purchases; exempt businesses generally cannot. The VAT paid on lab fees, equipment, and supplies is a real cost for exempt dental practices.

What is VAT-exempt in dentistry

Dental services performed by a registered dental professional where the primary purpose is protecting, maintaining, or restoring a patient’s health are generally VAT-exempt. This covers the vast majority of NHS work and most private clinical treatment.

What is not VAT-exempt

• Purely cosmetic procedures where there is no clinical or health justification.
• Product sales including whitening kits, toothbrushes, and oral care products.
• Non-clinical training courses or consultancy services sold to other practices.

The line between clinical and cosmetic is not always obvious. HMRC allows flexibility: where a cosmetic element forms part of a treatment that is primarily for health reasons, the whole treatment may remain exempt. What is documented in patient notes matters.

Partial exemption

Practices providing both exempt and taxable services become partially exempt. Input VAT recovery is limited to the proportion relating to taxable activities, calculated using an approved method. Getting partial exemption calculations wrong creates problems in both directions. For any practice with meaningful cosmetic or retail income, specialist VAT advice pays for itself.

VAT registration: gov.uk

VAT for dental and optical services: HMRC guidance

Capital Gains Tax and Business Asset Disposal Relief

CGT can arise when you sell goodwill, sell shares in the company, or sell practice property. The structure of the sale determines who pays it and how it is calculated. Natasha on what the difference between qualifying and not qualifying for BADR actually means financially:

“When BADR applies, it will be 10%. But if it hasn’t been applied, they would pay either 24% or 18%, depending on the nature of the sale and the tax bracket they fall into. 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.”

Natasha Gnanapragasam
Director of Operations

Timing matters beyond just the sale structure itself. Extracting funds from the company shortly before a sale – through an unusually large dividend or a lump pension contribution timed to coincide with completion – can trigger unnecessary tax if it’s not planned properly well in advance. Any pre-sale extraction should be planned as part of the same process as confirming your BADR eligibility, not treated as a separate, later decision.

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

Business Asset Disposal Relief: gov.uk

Stamp Duty Land Tax when buying practice property

Stamp Duty Land Tax applies when you buy freehold or leasehold commercial premises, charged in bands on the purchase price rather than as a flat percentage. It’s a separate cost from CGT and applies at the point of purchase, not sale – worth factoring into the total cost of buying a practice property, not just the headline price. If you’re considering moving property between personal and company ownership, model the SDLT cost carefully before acting, since a transfer between the two can itself trigger a charge.

Stamp Duty Land Tax: gov.uk

Capital allowances on equipment

Capital allowances are the main mechanism for claiming tax relief on equipment, technology, and some property improvements in a dental practice. Natasha on why getting this right requires understanding each asset’s specific rules:

“When they purchase equipment and capital assets, it is really important that they record those correctly for capital allowances. Every different asset has different rules when it comes to claiming tax relief. You need to understand the nature of each asset and what rule applies, then apply the correct percentage to claim the capital allowances. It is not one size fits all.”

Natasha Gnanapragasam
Director of Operations

The Annual Investment Allowance allows 100% of qualifying plant and machinery costs to be deducted in the year of purchase, up to the annual limit. For dental practices this covers dental chairs, X-ray machines, CBCT scanners, CAD/CAM systems, autoclaves, sterilisation equipment, IT hardware, and certain surgery fit-out costs. The current limit is £1 million per year. Check the HMRC website before planning significant expenditure around it.

Annual Investment Allowance: gov.uk

Some qualifying purchases may also be eligible for First Year Allowances or full expensing, which offer enhanced upfront relief beyond the standard AIA rules on certain types of expenditure. Eligibility depends on the asset type and the timing of the purchase, so check current criteria on gov.uk before assuming a purchase qualifies.

First Year Allowances: gov.uk

Structure before any sale

If the practice sits within a holding company or group structure, this can help manage sale proceeds efficiently and make use of available group reliefs – but it needs to be arranged correctly well ahead of any transaction. A holding company structure that hasn’t been set up properly creates its own risks, including the kind of director’s loan account and Section 455 tax problems already covered in this article, so this is not a step to take without specialist advice specific to your situation.

When a practice owner comes to Samera planning a sale, Natasha describes what the firm does first:

“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

Practical tax planning checklist for practice owners

Running a dental practice through a limited company means more moving parts than a sole trader structure, but a small number of consistent habits keep most of them under control:

• Review salary and dividend mix annually. The optimal split changes as rates and profits change.
• Review the director’s loan account quarterly and ensure it does not go overdrawn without a formal dividend being declared.
• Plan employer pension contributions before year-end.
• Keep clear separate records for VAT-exempt and VAT-taxable supplies.
• Monitor taxable turnover as it approaches the VAT registration threshold.
• Plan significant equipment purchases around your accounting year-end.
• If a sale is on the horizon, start planning at least two to three years ahead.
• If a sale is on the horizon, avoid large dividends or lump pension contributions timed close to completion – plan any extraction alongside your BADR review, not separately.
• Factor Stamp Duty Land Tax into the total cost of any property purchase, and model it carefully before moving property between personal and company ownership.

Getting the structure right matters more than any single tax rule

Every area covered here – Corporation Tax, the director’s loan account, VAT, a future sale, capital allowances – connects back to the same underlying point: the right structure, set up and maintained properly, is what makes each of these reliefs and rules work in your favour rather than against you. An overdrawn director’s loan account, a badly structured holding company, or a sale planned without confirming BADR eligibility can all turn what should be a straightforward tax position into an expensive one.

None of this needs to be complicated if it’s reviewed regularly rather than left until year-end or until a sale is already in motion. Use this article as your starting point, then speak to a specialist dental accountant who understands where these areas specifically go wrong in dental practices, so nothing gets missed and nothing gets structured incorrectly from the start.

Taxes for Dental Practice Owners: FAQs

Glossary

• Director’s loan account: A record of all money that passes between you personally and the company outside of formally declared salary or dividends. Going overdrawn means you’ve taken out more than you’ve put in.
• Section 455 tax: The tax charge HMRC applies when an overdrawn director’s loan account isn’t repaid, written off, or declared as a dividend within nine months and one day of the company’s year-end.
• Benefit in kind: The tax treatment applied to a director’s loan exceeding £10,000 – the director pays Income Tax on a notional interest charge, and the company pays National Insurance on it.
• VAT exempt: The status of most clinical dental treatment, distinct from zero-rated – exempt practices generally cannot reclaim VAT on their own purchases, unlike zero-rated businesses.
• Partial exemption: The VAT calculation used by practices providing both exempt and taxable services, determining what proportion of input VAT can be reclaimed.
• Business Asset Disposal Relief (BADR): A relief that reduces the CGT rate on qualifying sales, but only where the structure and eligibility are confirmed before the sale is agreed.
• Annual Investment Allowance (AIA): The relief that lets you deduct the full cost of qualifying equipment from taxable profit in the year of purchase, up to the annual limit.
• First Year Allowances: Enhanced upfront relief available on certain types of expenditure, separate from and in addition to the standard AIA rules.
• Stamp Duty Land Tax (SDLT): A banded tax charged when buying freehold or leasehold commercial premises, separate from CGT and applying at the point of purchase rather than sale.