Understanding which expenses you can legitimately claim against tax is one of the most practically useful things any dentist can know. For associates it directly reduces the Self Assessment bill. For practice owners it reduces company taxable profits and feeds into decisions from equipment purchases to staffing levels.
This article covers the rules. For the strategies that use those rules most effectively, see our guide on reducing your dental tax bill. For the broader tax context, start with our complete guide to dental accounting and tax.
This article is for general information. It is not specific tax advice for your situation. Tax rules change with each Budget and we link to HMRC directly rather than quoting figures that date quickly.
What this article covers
Which income sources need to be recorded and how.
Which expenses HMRC allows dental professionals to claim and which it does not.
Cash basis versus accruals accounting and why the choice actually matters.
How capital allowances work on equipment purchases.
What records you need to support every claim.
Key Takeaways
Record income in the right category from the start – NHS clawbacks are income adjustments, not negative entries, and cosmetic fees may carry VAT that clinical treatment doesn’t.
Cash basis suits most associates starting out; the real difference only bites once you buy versus lease equipment, since only purchases qualify for capital allowances.
The test for every expense is the same: wholly and exclusively for the business. A personal element usually rules a claim out entirely.
Dental loupes and most clinical equipment qualify in full for the Annual Investment Allowance – claimed in the year of purchase, not spread over time.
Keep every receipt and a mileage log for at least six years – HMRC can open an enquiry on any return, and unsupported claims get disallowed.
Dental income: getting the recording right
Every pound of income needs to be recorded accurately and in the right category. The category matters because it affects VAT treatment, NHS pension calculations, and how clearly your accounts reflect the actual performance of the practice.
NHS contract payments. Fixed income based on UDA values and activity targets. Clawback adjustments for missed UDA delivery are adjustments to income, not separate negative entries. They affect both your accounts and your NHS pension calculations.
Private treatment fees. Generally VAT-exempt when the primary purpose is clinical care. Needs to be recorded separately from NHS income.
Hygiene income. Scale and polish, periodontal treatment, recall appointments. Generally VAT-exempt.
Cosmetic procedure fees. Where a procedure is purely aesthetic with no clinical justification, it may be subject to VAT. This is one of the most frequently mishandled VAT areas in dentistry. See our article on taxes for practice owners for more on the dental VAT position.
Product sales. Whitening kits, toothbrushes, oral care products. Generally standard-rated for VAT and tracked separately from clinical income.
Dental plan income. Monthly capitation payments from plan providers. Usually recognised as spread income over the plan period rather than in one lump sum.
Associate fee splits. If you are a practice owner retaining a share of associate earnings, record each associate’s gross and your share separately.
Cash basis versus accruals: which one applies to you
This distinction rarely gets explained to newly self-employed associates, but it can affect which expenses you claim and in which tax year they fall. Natasha Gnanapragasam, Director of Operations, Accountancy and Tax at Samera, explains the difference and where it matters most practically:
“Cash basis and accruals basis, there’s a real difference in how you recognise things, whether it’s income or cost of sales. Accruals means we do that based on invoices and sales. Cash means it’s only recognised when a transaction happens. So the timing matters, it reflects on your financial statements and gives an accurate picture of how your profit and loss looks. And a real example where it makes a tangible difference is rental equipment versus purchased equipment. When you buy, you can claim capital allowances depending on the nature of the asset. When you lease, you can’t, it just becomes a profit and loss expense item. That’s a significant difference in how the tax relief actually works.”
Natasha Gnanapragasam Director of Operations
For most dental associates, particularly those starting out, cash basis is perfectly adequate and avoids unnecessary complexity. As income grows or the financial situation becomes more involved, your accountant will let you know if switching makes sense. The important thing is to apply one method consistently rather than switching without a good reason. For current cash basis thresholds, check the HMRC website.
Allowable expenses: the rule HMRC applies to everything
One consistent test applies to every expense claim: it must be incurred wholly and exclusively for the purposes of the dental business. Expenses that have a personal element are generally not allowable, though a clearly identified and justifiable business proportion may sometimes be claimable.
Clinical and professional expenses
Lab fees and outsourced dental work, including crown, bridge, denture, and orthodontic appliance fees, fully deductible as a direct clinical cost.
Dental materials and clinical consumables.
PPE including gloves, masks, visors, and scrubs, confirmed by HMRC as deductible for clinical use.
Clinical cameras and digital tools used for treatment documentation.
GDC annual registration fees.
Professional indemnity premiums with Dental Protection, MDDUS, or BDA Indemnity.
CPD courses, both mandatory and voluntary continuing professional development.
Cleaning and laundry of scrubs and uniforms, and their replacement when worn out.
Dental conference fees and professional seminar attendance.
Annual membership fees for the BDA, FGDP, RCS, specialist societies, and local study clubs.
Clinical textbooks, professional journals, and study materials used for your dental work.
Staff and employment costs
Salaries, wages, and bonuses for employed staff.
Employer National Insurance contributions.
Workplace pension auto-enrolment contributions.
NHS pension employer contributions where applicable.
Staff training and CPD costs.
Recruitment agency fees.
Premises and running costs
Rent and business rates.
Electricity, gas, and water.
Practice insurance.
Cleaning costs and maintenance.
Equipment service contracts and repair costs.
Professional and administrative costs
Accountancy and bookkeeping fees. These are themselves a deductible expense.
Legal fees relating to the business.
Practice management software subscriptions.
Bank charges on business accounts.
The business proportion of telephone and internet costs. If you use a personally-owned laptop, printer, or similar equipment for practice admin, the business can also contribute toward the business-use proportion of that cost.
Printing, postage, stationery, and general office equipment such as desks and filing cabinets.
Marketing and advertising costs
Website design, hosting, and maintenance.
Online advertising, including Google Ads and social media campaigns.
Printed marketing materials such as leaflets, signage, and business cards.
Photography or videography used for practice marketing.
Travel expenses
Mileage when travelling between two different practices on the same working day.
Travel to CPD events, dental conferences, professional development courses, and to your accountant.
Train, taxi, and bus fares for business travel.
Parking at workplaces other than your regular practice.
Use of home as office
If you carry out admin at home – managing accounts, ordering materials, handling correspondence – you can claim a portion of your home running costs. Two methods are accepted:
HMRC’s flat rate method: a fixed weekly amount based on hours worked from home, currently starting from £4 a week for the simplest cases.
The actual costs method: a proportion of electricity, heating, water, council tax, and rent or mortgage interest, based on the genuine business-use percentage.
The flat rate is simpler; the actual costs method can produce a larger claim if your business use is significant, but needs the calculation properly documented.
If you operate through a limited company, you’re treated as an employee for expense purposes. From April 2026, employees can no longer personally claim working-from-home tax relief directly from HMRC – your company can still reimburse you tax-free for genuine home-working costs, but the claim route has moved from you to the business. This distinction doesn’t affect sole traders or partnerships claiming use of home as a self-employed business expense.
The ordinary commute from home to your regular practice cannot be claimed. Business mileage is claimed at HMRC’s approved rates – check the current rate on gov.uk as it’s periodically updated. Alternatively, you can claim a business-use proportion of your actual car costs (fuel, repairs, servicing, insurance) rather than the mileage rate, though for most associates the mileage method gives a better result. Model both if your business mileage is high.
What cannot be claimed, including some creative attempts
The rule is clear enough, but creativity in applying it is common. Arun Mehra, CEO of Samera, has seen some memorable examples over the years:
“Someone goes on a course in New York, a very nice course. The course is only two days. But they stay for two weeks and try to claim the whole accommodation, flights, everything as a business expense. That’s a very contentious area and you can’t do that. Another one I’ve seen is someone trying to claim their children’s nursery fees and school fees through the business, somehow it’s business-related because it allows them to work. And I’ve seen a home gym claimed for, because that’s good for their wellbeing and health and therefore good for the business. Good imagination. But none of it qualifies.”
Arun Mehra Samera Founder & CEO
Natasha adds two she sees more regularly:
“Vehicle purchase is a common one, they might just claim 100% without realising it doesn’t fully qualify. And repairs done to their house get claimed because ‘that’s my office’, a new boiler, new windows, new equipment in the home. You cannot do that. Sometimes the funny part is any repair done to the house, they tend to claim those too.”
Natasha Gnanapragasam Director of Operations
The list of what genuinely cannot be claimed:
The commute from home to your regular practice.
Personal clothing that does not qualify as clinical PPE or branded practice uniform.
Client or patient entertainment of any kind.
HMRC fines, penalties, or interest charges on late payments.
Personal spending that has passed through the business account.
Training that leads to a completely new qualification unrelated to your existing dental work.
The dual-use rule: Where something is used for both business and personal purposes, a mobile phone, home broadband, you can generally claim only the business proportion. That proportion needs to be realistic and consistent. HMRC will question splits that look inflated.
The expenses most consistently missed
Arun and Natasha both pointed to the same areas that dental professionals most commonly fail to claim at all:
“Use of home, that’s one of the most common things missed. Associates don’t understand the nuances of how to claim it. We educate them and guide them through it. And travel between practices, that depends on the specifics, but it’s regularly missed too. These are legitimate claims that go unclaimed simply because nobody explained them.”
Natasha Gnanapragasam Director of Operations
“There’s no annual equipment allowance as such, but people don’t realise that if you buy something work-related, it can be claimed to reduce your tax liability. Associates often don’t realise they can claim for dental loupes or equipment they’ve purchased. These are little things but they all add up. The important thing is having proper guidance so you’re claiming everything you’re entitled to.”
Arun Mehra Samera Founder & CEO
Capital allowances on equipment
Capital equipment (items that last more than a year and are used to run the practice) is not claimed as an ordinary annual expense. Tax relief is provided through capital allowances, and for most dental practices the Annual Investment Allowance means the full cost of qualifying items can be claimed in the year of purchase.
Annual Investment Allowance
The AIA 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. Fixtures generally qualify; structural building work generally does not. The current AIA limit is £1 million per year. Check the HMRC website before planning any large purchase around it as governments can and do change this figure.
If your capital spending in a year exceeds the AIA limit, the excess isn’t lost – it’s claimed instead through Writing Down Allowances, which spread the tax relief over several years rather than all at once. This is mainly relevant to larger practices or groups with substantial equipment spend in a single year.
Loupes are typically the largest single equipment purchase for most associates and they qualify in full for the AIA. The entire cost can be deducted from your taxable profit in the year of purchase. Keep the invoice and make sure your accountant includes the claim.
Buying versus leasing
Leasing helps with cash flow and avoids a large upfront capital commitment, but the tax treatment differs from buying outright. Lease payments are generally deductible as an ongoing revenue expense rather than through capital allowances. Whether buying or leasing produces better tax relief depends on the asset type, the lease terms, and your profit level in the relevant year. Worth modelling with your accountant before committing to either route on a significant purchase.
VAT and dental expenses
For practices providing only exempt clinical treatment, input VAT on purchases generally cannot be reclaimed. The VAT paid on lab fees, equipment, and supplies is a real business cost, not something you recover.
For practices with some taxable income, such as cosmetic procedures or product sales, and with a VAT registration, a proportion of input VAT can be reclaimed through partial exemption calculations. Getting this wrong creates problems in both directions. Under-recovery means paying more VAT than you should; over-recovery creates a liability. For any practice earning meaningful taxable income, specialist VAT advice pays for itself.
Records HMRC expects you to keep
Every expense claim needs supporting evidence. HMRC can open an enquiry into any return, and without records to back up what was filed, claims can be disallowed and estimated assessments raised.
Keep all receipts. Scan paper ones immediately. HMRC accepts digital copies.
Store records for at least six years after the relevant accounting period.
Keep a mileage log for all business travel: date, destination, purpose, and distance.
Note the business purpose of significant expenses, particularly for anything unusual.
Have you categorised your income sources correctly – NHS, private, hygiene, and product sales recorded separately?
Does every expense claim genuinely pass the wholly-and-exclusively test?
Have you recorded all capital purchases, including loupes and equipment, and claimed the Annual Investment Allowance where it applies?
Are you using the cash basis or accruals method consistently, and does your recordkeeping meet Making Tax Digital requirements where they apply to you?
Have you reviewed use of home, travel between practices, and any other commonly missed claims?
Have you had your claims reviewed by a dental specialist accountant, rather than a generalist?
Getting this right takes proper records and the right guidance, not guesswork. Use this article as your starting point, then speak to a specialist who works with dentists specifically to make sure nothing is missed and nothing is over-claimed.
Our Expert Opinion
“There are so many business expenses that can be claimed for when trading as a dentist. But the key is to identify what is business and what is personal to ensure you don’t fall foul of HMRC’s requirements. Use this guide as a starting point and then seek expert help to make the right claims.”
Yes. Loupes are clinical equipment used wholly and exclusively for dental work. They qualify for the Annual Investment Allowance, meaning the full cost can be deducted from taxable profit in the year of purchase.
What is capital allowance, and how does it work for dental practices?
Capital allowances are how tax relief is given on equipment that lasts more than a year, rather than as an ordinary annual expense. For most dental practices, the Annual Investment Allowance means the full cost of qualifying equipment can be deducted from taxable profit in the year of purchase, rather than spread over several years. Spending beyond the annual limit is claimed instead through Writing Down Allowances, spread across future years.
What is the difference between cash basis and accruals accounting?
Cash basis records income when you receive it and expenses when you pay them. Accruals records income when it is earned and expenses when they are incurred, regardless of when cash actually moves. Most associates start on cash basis. Limited companies must use accruals. The choice affects how capital allowances work on equipment.
Are lab fees tax deductible?
Yes. Lab fees are a direct clinical cost and are fully deductible as a business expense in both Self Assessment and Corporation Tax returns.
Are CPD courses tax-deductible?
Yes, where the training maintains or updates your existing professional knowledge. Training that leads to a completely new qualification unrelated to your existing dental work is treated differently and generally cannot be claimed – this is an area HMRC scrutinises closely.
Can I claim home office expenses if I work from home?
Yes, if you carry out admin at home such as managing accounts or handling correspondence. You can use HMRC’s flat rate method, a fixed weekly amount based on hours worked from home, or the actual costs method, claiming a proportion of household running costs based on genuine business use. The actual costs method can produce a larger claim but needs the calculation properly documented.
Can I claim my overseas dental conference as a business expense?
You can claim the conference registration and a proportionate amount of travel and accommodation for the actual conference days. You cannot claim the cost of extending the trip for personal reasons. HMRC looks at the primary purpose of the journey.
Does HMRC accept digital receipts?
Yes. Scanned or photographed receipts are accepted. Most accounting apps capture and store these automatically. The receipt needs to show the amount, supplier, and date of the transaction.
How should I keep records of my business expenses?
Keep every receipt, scanning paper ones immediately since HMRC accepts digital copies, and store records for at least six years after the relevant accounting period. Keep a mileage log recording date, destination, purpose, and distance for all business travel, and note the business purpose of anything unusual. HMRC can open an enquiry into any return, and claims without supporting evidence can be disallowed.
Glossary:
UDA (Unit of Dental Activity): The measure used to calculate NHS contract payments based on treatment activity delivered against agreed targets.
Clawback: An adjustment to NHS income when contracted UDAs aren’t fully delivered – recorded as an income adjustment, not a separate negative entry.
Cash basis: Recording income when you receive it and expenses when you pay them, rather than when they’re earned or incurred. The default starting point for most self-employed associates.
Accruals: Recording income when it’s earned and expenses when they’re incurred, regardless of when the cash actually moves. Required for limited companies.
Wholly and exclusively: The test HMRC applies to every expense claim – it must be incurred entirely for business purposes, with no personal element, for it to be allowable.
Annual Investment Allowance (AIA): The relief that lets you deduct the full cost of qualifying equipment from taxable profit in the year you buy it, rather than spreading it over several years.
Writing Down Allowances (WDA): The relief used once capital spending exceeds the AIA limit in a given year, spreading tax relief over several years instead.
Partial exemption: The VAT calculation used by practices with both exempt clinical income and taxable income (such as cosmetic work or product sales), determining what proportion of input VAT can be reclaimed.
Neha Jain is a skilled content writer with a rich background in business and financial knowledge. With a bachelor’s degree in English Literature and Psychology, Neha has honed her writing skills, furthering her expertise with the Content Writing Master Course (CWMC) at IIM SKILLS and a Content Marketing Certification from HubSpot Academy.
Working alongside our business development experts, Neha specialises in helping accountants, dentists and other healthcare professionals start, scale and sell their businesses.
Arun, founder and CEO of Samera, is an experienced accountant and dental practice owner. He specialises in accountancy, building businesses, financial directorship, squat practices and practice management.
Natasha specialises in accounting and tax for dental and healthcare businesses, helping clients improve tax efficiency, streamline financial systems, and build scalable processes for long-term growth.
Charles specialises in bookkeeping, year-end accounts, company secretarial work and tax return preparation, helping clients maintain accurate records, smooth financial processes and compliant reporting.
Need help with your dental accounts?
Samera works with dental associates, practice owners and dental groups to manage accounts, tax, bookkeeping and financial reporting. If you want clearer numbers, less admin and a system that works throughout the year, book a free consultation with our dental accounting team.
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