Most of what your practice does is VAT-exempt, so for years you've ignored VAT entirely. Then the practice starts selling teeth-whitening kits, retailing electric toothbrushes, or your hygienist's facial-aesthetics arm takes off, and suddenly you have standard-rated income too. That mix is exactly when VAT stops being something you can leave alone.
This guide is for principal dentists and practice managers running a mixed practice: mostly exempt dental care, with a slice of standard-rated sales. We'll cover when you have to register, why you can't recover all your VAT once you do, and how the partial exemption rules decide how much you actually get back.
We'll work through a full illustrative example with current figures, and give you a decision walkthrough so you can see where your own practice sits.
What is partial exemption for a dental practice?
Partial exemption applies when a VAT-registered business makes both taxable and exempt supplies. A dental practice that registers for VAT can only reclaim the VAT it incurs on costs linked to its taxable (standard-rated) sales, not the VAT on costs linked to its exempt dental care.
The core reason sits in how dental income is treated. Dental care and treatment supplied by a professional on the General Dental Council (GDC) register is VAT-exempt where the primary purpose of the service is "the protection, maintenance or restoration of the health of the person concerned", per VAT Notice 701/57. That covers routine check-ups, fillings, root canals, dentures, crowns and bridges.
Some of what a practice sells is not health care, though. That's where the mix, and partial exemption, comes in.
Table of contents
- What counts as exempt versus standard-rated dental income?
- When does a dental practice have to register for VAT?
- How does partial exemption decide what VAT you can reclaim?
- What is the de minimis limit and why does it matter?
- Worked example: a mixed practice for 2025/26
- What is the annual adjustment?
- A decision walkthrough for your practice
- Frequently asked questions
What counts as exempt versus standard-rated dental income?
The line is drawn by purpose, not by the procedure name. If a treatment's primary purpose is protecting, maintaining or restoring health, and it's delivered by a GDC-registered professional, it's exempt. If it's done for another reason, usually appearance alone, it's standard-rated at 20%.
HMRC's view on cosmetic work is nuanced. In its internal manual VATHLT2480, HMRC says "it is rare for dental work to be done purely for cosmetic reasons", and that where a cosmetic element is "performed as part of a supply of dental treatment, then there is a single supply of exempt healthcare". The flip side is also stated plainly: "Where cosmetic dentistry is performed outside of any healthcare, it is standard rated."
So a smile makeover bundled into a genuine treatment plan can be a single exempt supply. A standalone teeth-whitening session sold purely on appearance is not.
Goods are treated differently again. VAT Notice 701/57 confirms that "items, other than prostheses, that are separable from dental treatment", such as toothbrushes, toothpaste and dental floss, are usually standard-rated when a practice sells them. Dental prostheses themselves, including dentures, artificial teeth, crowns, bridges and plates, remain exempt.
Here's a rough sorting guide. Always confirm borderline cases, because the facts of each supply matter.
| Type of income | Usual VAT treatment |
|---|---|
| NHS and private dental treatment (check-ups, fillings, root canals) | Exempt |
| Dentures, crowns, bridges and other prostheses | Exempt |
| Cosmetic work that's part of a genuine treatment plan | Exempt (single supply of healthcare) |
| Standalone teeth whitening sold purely for appearance | Standard-rated (20%) |
| Retail of toothbrushes, toothpaste, floss, whitening kits | Standard-rated (20%) |
| Non-surgical facial aesthetics done purely cosmetically | Standard-rated (20%) |
If your standard-rated lines are small, you may never reach the registration threshold at all. That's the first thing to check.
When does a dental practice have to register for VAT?
You must register for VAT when your VAT taxable turnover over the last rolling 12 months goes over £90,000, the threshold that has applied since 1 April 2024, per gov.uk VAT registration. You must also register if you expect to cross it in the next 30 days alone.
The key point for dentists: "VAT taxable turnover" means only your taxable supplies, the standard-rated and any zero-rated income. Your exempt dental care does not count towards the £90,000. A practice turning over £2 million almost entirely in exempt treatment can still be below the threshold if its standard-rated sales stay under £90,000.
So registration usually only bites once the cosmetic, retail or aesthetics side grows. Once you do register, you have a deregistration threshold of £88,000 if taxable turnover later falls back, also in force since 1 April 2024 (from the verified VAT thresholds in our rates reference).
A word of caution. The 30-day forward look catches practices that win a big block of standard-rated work, so watch a fast-growing aesthetics arm closely rather than only looking backwards.
How does partial exemption decide what VAT you can reclaim?
Once registered, you sort the VAT on your costs (your input tax) into three buckets, following the standard method in VAT Notice 706:
- Directly attributable to taxable supplies. VAT on costs used wholly to make standard-rated sales, for example stock of retail toothbrushes or whitening products. Fully recoverable.
- Directly attributable to exempt supplies. VAT on costs used wholly for exempt dental care, for example dental materials used only in NHS and private treatment. Not recoverable (unless de minimis applies, below).
- Residual input tax. VAT on shared overheads that you can't pin to one side, for example rent, heat and light, reception software, accountancy fees. This is split.
You recover the residual VAT in proportion to your taxable use. Under the standard method the recovery percentage is:
Value of taxable supplies in the period (excluding VAT) divided by total value of all supplies in the period (excluding VAT), multiplied by 100.
VAT Notice 706 says this percentage is "rounded up to the next whole number" unless you incur more than £400,000 of residual input tax each month on average, which no ordinary dental practice does. So for almost every practice you round the percentage up to the next whole number, which works slightly in your favour.
Your recoverable input tax for the period is then: all the directly attributable taxable VAT, plus the residual VAT multiplied by that rounded recovery percentage.
What is the de minimis limit and why does it matter?
There's a relief that can hand you back all of your exempt-related VAT. If your exempt input tax is small enough, you're treated as fully taxable and can recover the lot.
Per VAT Notice 706, you're within the de minimis limit if your exempt input tax (the directly attributable exempt VAT plus the exempt slice of the residual) is both:
- no more than £625 per month on average (that is £1,875 per quarter, or £7,500 per VAT year), and
- no more than 50% of your total input tax in the period.
Both conditions must be met. If you pass, you reclaim 100% of your input tax for that period. If you fail, you keep only the taxable portion.
VAT Notice 706 also offers two simplified tests so smaller businesses can avoid a full calculation each quarter. In broad terms, if total input tax (Test One), or total input tax minus the directly attributable taxable VAT (Test Two), is no more than £625 per month on average and exempt supplies are no more than 50% of total supplies, you can treat yourself as de minimis. Many small mixed practices clear these easily.
This is why the de minimis test is the single most valuable check for a smaller dental practice. The difference between passing and failing it is often the difference between recovering all your overhead VAT and recovering only a sliver of it.
Worked example: a mixed practice for 2025/26
Illustrative example. Bridgeview Dental is a private and NHS practice that has built up a standard-rated aesthetics and retail arm. For its VAT year in 2025/26 the figures are below. All values exclude VAT, and input tax figures are the VAT actually incurred on costs.
| Item | Amount |
|---|---|
| Exempt dental income (treatment, prostheses) | £820,000 |
| Standard-rated income (whitening, retail, aesthetics) | £130,000 |
| Total supplies | £950,000 |
| Input tax directly attributable to taxable supplies | £4,000 |
| Input tax directly attributable to exempt supplies | £9,000 |
| Residual input tax (shared overheads) | £20,000 |
| Total input tax | £33,000 |
Step 1: standard method recovery percentage. Taxable supplies divided by total supplies = £130,000 / £950,000 = 13.68%, rounded up to the next whole number = 14%.
Step 2: recoverable residual VAT. 14% of £20,000 = £2,800. The remaining £17,200 of residual VAT relates to exempt use.
Step 3: provisional recoverable input tax. Directly attributable taxable £4,000 + recoverable residual £2,800 = £6,800.
Step 4: the de minimis check. Exempt input tax = directly attributable exempt £9,000 + exempt residual £17,200 = £26,200. That is far above £7,500 a year, and it's more than 50% of total input tax. Bridgeview fails de minimis, so it cannot recover the exempt VAT.
Result: Bridgeview recovers £6,800 of its £33,000 input tax for the year.
Now change one fact. Suppose Bridgeview's exempt-related input tax for the year had instead come to just £7,000, with total input tax of £18,000. That's under £7,500 and under 50% of the total, so it would pass de minimis and recover the full £18,000. Same business, very different VAT outcome, driven entirely by how the de minimis test lands.
The arithmetic here is illustrative. Your own figures, and the right partial exemption method for your practice, should be confirmed with an accountant.
What is the annual adjustment?
Partial exemption is calculated each VAT period, but those quarterly figures are only provisional. At the end of your partial exemption "longer period", normally a 12-month VAT year ending 31 March, 30 April or 31 May depending on your VAT stagger, you redo the whole calculation across the full year, per VAT Notice 706.
The annual adjustment smooths out quarters that were unusually heavy on exempt or taxable costs. The difference between the sum of your provisional quarterly recoveries and the annual figure is corrected on your first return after the longer period (or the next one).
A new mixed practice's first longer period runs from the start of the VAT period in which it first incurs exempt input tax to the end of that VAT year. It pays to diarise the annual adjustment so it isn't missed, because it's a common slip that triggers HMRC queries.
A decision walkthrough for your practice
Work through these in order:
- Add up only your taxable (non-exempt) income over the last 12 months. Under £90,000 and not about to spike? You don't need to register, though keep watching as cosmetic or retail income grows.
- Over the threshold? You must register. From then on you're partly exempt.
- Sort your input tax into directly attributable taxable, directly attributable exempt, and residual.
- Run the de minimis test. Exempt input tax no more than £625 a month on average and no more than 50% of total input tax? Recover everything.
- Fail de minimis? Apply the standard method: recover all taxable-attributable VAT plus the rounded-up taxable percentage of residual VAT.
- At year-end, run the annual adjustment and correct the figure.
If your standard-rated arm is genuinely growing, it's worth getting the structure and method right early. A specialist accountant can also tell you whether the standard method actually fits your practice, or whether a special method would recover more. For tailored help with all of this, see our accountants for dentists page.
Getting the exempt-versus-taxable split right also feeds straight into your year-end numbers, which is why we handle VAT and statutory accounts together for dental clients.
Frequently asked questions
Does NHS dental income count towards the VAT registration threshold?
No. NHS and private dental treatment is VAT-exempt, and exempt income is excluded from VAT taxable turnover. Only your standard-rated income, such as retail sales, standalone cosmetic work and non-surgical aesthetics, counts towards the £90,000 registration threshold.
Is teeth whitening subject to VAT?
It depends on why it's done. Where whitening is part of a genuine dental treatment plan delivered by a GDC-registered professional, it can form a single exempt supply of healthcare. Where it's sold purely for appearance, outside any health-care treatment, HMRC treats it as standard-rated at 20%.
What is the de minimis limit for a partly exempt dental practice?
You can recover all of your input tax if your exempt input tax is both no more than £625 a month on average (£1,875 a quarter or £7,500 a VAT year) and no more than 50% of your total input tax. Both conditions must be met in the period.
Can I reclaim all the VAT on my practice overheads once I register?
Usually no. Overheads such as rent, utilities and software are residual input tax, shared between exempt and taxable activities. Unless you pass the de minimis test, you only recover the taxable proportion, calculated under the standard method by dividing taxable supplies by total supplies and rounding up to the next whole percentage.
How often do I have to do the partial exemption calculation?
Every VAT period (usually quarterly) on a provisional basis, then once more at the end of your partial exemption longer period, normally your 12-month VAT year. That final calculation is the annual adjustment, and any correction goes on your next return.
Do I need a special partial exemption method?
Not necessarily. The standard method (taxable supplies over total supplies) works for most practices. A special method must be agreed in writing with HMRC and only makes sense if it more fairly reflects how you use your costs and recovers more. An accountant can model both before you commit.
