Most dental VAT guidance stops at a single sentence: dental treatment is exempt. That is true, but it leaves the whole laboratory supply chain unexplained, and the lab chain is where a surprising amount of avoidable error lives. Who can exempt a crown, and on what condition? Is a lab fee VATable? Can a practice reclaim VAT on lab work? What about the gold in a bridge, an aligner sold over the counter, or a whitening kit at reception? This page walks the chain from technician to named patient and back out to the standard-rated tail, with the statutory hooks and dental numbers attached.

The anchor is VATA 1994 Schedule 9 Group 7, the health-and-welfare exemption, and in particular its prostheses limb. It sits alongside our broader dental VAT and compliance guide, but where that guide covers registration and the headline exempt-versus-taxable split, this page is the prostheses and lab-supply specialist.

The two exemptions in Group 7 that matter here

Group 7 contains more than one relevant exemption, and the distinction is the key to the whole topic. The first is the medical-care exemption: the supply of dental care by a person registered in the dentists' register or the dental care professionals register is exempt, because it is the provision of medical care. The second, and the one this page turns on, is the prostheses exemption at Item 2A.

Item 2A is wider than the medical-care limb in one decisive respect: it exempts the supply of dental prostheses by a registered dentist, a dental care professional, or a registered dental technician. The technician is named explicitly. That matters because a dental technician making a crown in a commercial laboratory is not providing medical care to the patient; the technician never sees the patient. Without Item 2A, the technician's supply to the practice could be standard-rated. Because Item 2A names the technician, that supply is exempt. The exemption follows the prosthesis down the chain, from technician to practice to named patient, rather than depending on who is in the room with the patient.

What counts as a dental prosthesis

The exemption is for prostheses, so the boundary of "prosthesis" matters. HMRC's own guidance (VATHLT2490) treats the following as dental prostheses:

  • partial and full dentures;
  • fixed and removable bridges;
  • crowns and inlays;
  • obturators and splints;
  • dental palates and other specially designed appliances;
  • individual artificial teeth; and
  • gold supplied as part of any of those items.

The common thread is a made-to-purpose dental appliance, fabricated for a patient's treatment, not a generic product sold off a shelf. That distinction (made-for-the-patient appliance versus generic product) is the line that divides the exempt prosthesis world from the standard-rated retail world covered later on this page.

The named-patient, dental-benefit condition

Item 2A is not a blanket exemption for anything a laboratory makes. The exemption applies where the prosthesis is for the dental benefit of a named patient. A crown made on a dentist's prescription for a specific patient qualifies. A batch of generic components made to stock, not tied to any patient's treatment, does not automatically qualify and can be standard-rated.

In practice this condition is easy to meet for genuine prosthesis work, because labs make to prescription against a patient job anyway. But it is the condition that draws the line, and it is the reason the patient-linked job record is the single most important VAT record in a dental laboratory. If the link to a named patient's treatment cannot be shown, the exemption is harder to sustain.

Lab-to-practice supplies: in-house versus external labs

The technician limb works the same way whether the technician is in-house or an external commercial laboratory. An in-house technician supplying a prosthesis for a named patient is making an exempt supply within the practice. An external commercial lab supplying the same prosthesis to the practice on prescription is also making an exempt supply, because Item 2A names the technician.

For an external lab, there is a second-order consequence worth flagging: the lab itself may be partially exempt. If the lab makes exempt prosthesis supplies but also sells standard-rated items (generic stock, non-prosthesis products, materials sold separately), it is making mixed supplies and has its own input-VAT recovery problem on its overheads. The lab faces the same three-bucket attribution and de minimis analysis that a mixed practice does. Labs often miss this because they assume everything they invoice is exempt, which is not quite right once a standard-rated line creeps in.

There is a practical asymmetry here that catches lab owners out. A lab that makes almost entirely exempt prostheses has very little recoverable input VAT, because the VAT on its rent, equipment, materials and utilities relates to making exempt supplies. It cannot reclaim the VAT on its new milling machine or its furnace simply because it is VAT-registered, if those costs feed an exempt prosthesis output. That is the mirror image of the practice's position: the same exemption that keeps the lab fee free of VAT for the practice also strands the lab's own input VAT. A lab weighing a major capital purchase needs to factor in that the VAT on it may be largely irrecoverable, which materially changes the real cost of the equipment.

In-house technician versus outsourced lab: the VAT is the same, the structure is not

Some practices employ an in-house technician or run a small in-house lab; others outsource everything to a commercial lab. For the VAT liability of the prosthesis itself, it makes no difference: a named-patient prosthesis is exempt under Item 2A either way. What differs is where the input VAT lands and whether it can be recovered.

With an in-house arrangement, the materials, the technician's equipment and the lab's running costs are the practice's own costs. Their VAT is part of the practice's partial-exemption calculation, almost all of it directly attributable to exempt treatment and therefore irrecoverable. With an outsourced arrangement, the practice simply pays an exempt lab fee with no VAT on it, and the irrecoverable input VAT sits inside the external lab's own accounts instead. Neither route generates recoverable VAT on the prosthesis side; the exemption follows the prosthesis whichever way it is made. The choice between in-house and outsourced is therefore a commercial and capacity decision, not a VAT-saving one, and any pitch that an in-house lab "saves VAT" on prostheses should be treated with caution.

The practice side: lab fees are an exempt cost

From the practice's point of view, lab fees for named-patient prostheses are an exempt cost. Because the lab's supply is exempt, there is normally no VAT on the lab fee to begin with, so there is nothing for the practice to reclaim. That is the usual position and it is the simple case.

The case to watch is where a lab does charge VAT on a standard-rated element. Even then, the practice generally cannot reclaim that VAT, because the cost relates to the practice's exempt dental treatment. In partial-exemption terms it is directly attributable to exempt supplies and therefore irrecoverable. This is the natural meeting point between this page and the recovery mechanics, which are set out in full in our guide to recovering input VAT in a mixed dental practice. The short version: VAT on lab costs almost never comes back, because it sits on the exempt side.

How lab costs are recorded in the accounts (cost of sales versus overhead, and the resulting margin picture) is a separate but related question. Our companion page on the accounting treatment of laboratory costs is the bookkeeping companion to this VAT-liability page; the two together give the full picture of how lab work flows through a practice's numbers.

What falls outside the prosthesis exemption

Not everything a practice or lab sells is a prosthesis or treatment. Items that are separable from treatment and are not prostheses are standard-rated:

  • toothbrushes and electric toothbrushes;
  • toothpaste, mouthwash and floss;
  • take-home whitening kits sold as retail products; and
  • other reception retail lines.

The test is separability. A product a patient could buy and walk out with, that is not part of an inseparable course of treatment, is standard-rated at 20%. By contrast, consumables genuinely used in and inseparable from the exempt treatment (the materials used during a filling or an extraction, for example) follow the treatment and are exempt; they are not separate supplies (HMRC's guidance at VATHLT2500 makes this point). The dividing question is always: is this a separate product the patient is buying, or part of the dental care being delivered?

Worked example, the standard-rated tail in a real practice (2025/26). A practice that uses an external lab for all its crowns and bridges (exempt) also sells take-home whitening kits and electric toothbrushes at reception, generating £30,000 a year. Those are separable products, not prostheses or treatment, so they are standard-rated. That £30,000 is taxable turnover counting towards the £90,000 registration threshold, and it is the income that creates a partial-exemption recovery position, letting the practice reclaim some VAT on related costs. The exempt prosthesis income, by contrast, neither counts towards the threshold nor generates recovery.

Orthodontic appliances and aligners

Orthodontic treatment sits on the same line. Where aligners, retainers or fixed appliances form part of a course of dental treatment by a registered professional, they follow the exempt treatment and are exempt. Where the same kind of product is sold as a standalone retail item, detached from a course of professional treatment, it can be standard-rated.

This is genuinely fact-dependent, and the growth of direct-to-consumer aligner models has made it a live question. The framing to hold onto: it is not the object that determines the VAT treatment, it is whether the object is part of professional dental care for a patient or a product sold on its own. Where the cosmetic-versus-therapeutic purpose of a treatment is itself in question, our guide on the principal-purpose test for cosmetic versus therapeutic dental VAT covers the borderline in detail.

A useful way to test a borderline aligner case is to ask who is clinically responsible for the patient. Where a registered dentist or orthodontist takes the patient's records, plans the movement, supervises progress and is accountable for the outcome, the appliance is part of that professional treatment and follows the exempt treatment. Where the patient buys a kit, takes their own impressions and there is no registered professional carrying clinical responsibility, the supply looks far more like the sale of a standalone product, and the standard rate is the realistic answer. The presence or absence of a named, responsible registered professional in the clinical loop is the practical hinge.

Worked example, an aligner case that follows the treatment (2025/26). An orthodontist takes a patient on for a course of clear-aligner treatment, plans the tooth movement, reviews progress at intervals and is clinically responsible throughout. The aligners are made by a lab to that plan for the named patient. The whole supply is part of the orthodontist's exempt dental treatment, so it is exempt; no VAT is charged to the patient, and the lab's supply of the aligners for the named patient is exempt under Item 2A. Compare a reception-sold whitening kit in the same practice, which is a separable product and standard-rated. The two sit on opposite sides of the line for the same reason: one is professional treatment, the other is a product.

Imported and EU-sourced prostheses

Practices that use overseas laboratories sometimes worry about a hidden VAT cost on import. The reassurance is that dental prostheses imported into the UK can qualify for exemption or relief, so an overseas lab supplying a named-patient prosthesis does not create the import-VAT charge that importing a general product would. The detailed mechanics follow the relevant gov.uk import guidance, and it is worth confirming the position for any regular overseas arrangement so the relief is claimed correctly rather than VAT being paid unnecessarily.

The point to be careful about is documentation. The relief depends on the imported item genuinely being a dental prosthesis for a patient, so the import paperwork needs to describe the goods correctly and tie them to that purpose. A prosthesis shipped in as an unlabelled generic component, with nothing to show it is a dental appliance for a patient, risks being treated as a standard import and taxed accordingly. For a practice that sources crowns or aligners from an overseas lab on a regular basis, it is worth setting up the import descriptions and the patient-job link once, correctly, so the relief applies consistently rather than being argued case by case. The substance is the same as the domestic position: the prosthesis is exempt, but you have to be able to show what it is.

Gold and precious-metal content

Gold is a neat illustration of the prosthesis boundary. Gold supplied as part of an exempt prosthesis, the gold content of a named-patient crown or bridge, is within the exemption and is exempt along with the rest of the appliance. Gold supplied separately, as a standalone material not incorporated into a prosthesis, is not covered by the prosthesis exemption and follows its own VAT treatment. The carve-out is precise: incorporated into the patient's appliance, exempt; sold as a material on its own, not exempt.

Where this interacts with registration and recovery

Two threads tie the lab chain back to the practice's overall VAT position. First, registration: exempt prosthesis and lab income does not count towards the £90,000 taxable-turnover threshold, so a practice can have substantial prosthesis-related activity and still be below the threshold, with registration driven only by its standard-rated cosmetic and retail lines. Our page on the VAT registration threshold and requirements sets out exactly what counts.

Second, recovery: a practice with a standard-rated product line is partially exempt, and the VAT on its costs is only partly recoverable. The lab cost VAT (when any arises) sits on the exempt side and is lost; the product line is what creates recovery. The full mechanics are in the input-VAT recovery guide. Underpinning both is the bookkeeping: prosthesis income, exempt treatment income and standard-rated product income all have to be coded separately for any of this to work, which is the point of structuring an NHS and private mix set of accounts properly.

Two worked invoices: getting the split right

Worked example, an external lab supplying a crown for a named patient (Sch 9 Group 7 Item 2A, 2025/26). An external commercial lab makes a porcelain crown for a named patient on the dentist's prescription and invoices the practice £180. Because the technician is supplying a prosthesis for the dental benefit of a named patient, the supply is exempt. There is no VAT on the £180. The practice neither pays nor needs to reclaim any VAT on it. This is the clean, ordinary case, and it is the great majority of lab invoices: a patient-linked prosthesis, exempt, no VAT in the chain at all.

Worked example, a lab invoice with a mixed line (2025/26). A lab invoices £200 for a named-patient bridge (exempt) plus £40 for a generic stock model kit that is not tied to any patient (standard-rated, so £8 of VAT). Only the £8 element carries VAT. Because that £8 relates to the practice's exempt treatment, the practice generally cannot reclaim it; it falls on the exempt side of the practice's partial-exemption split. The right outcome is for the lab to split the invoice line correctly: £200 exempt for the bridge, £40 plus £8 VAT for the stock kit. Mislabelling the whole £240 as exempt under-declares VAT for the lab; mislabelling the whole thing as standard-rated wrongly charges VAT on the bridge that the practice then cannot recover. The discipline is to separate the prosthesis line from the non-prosthesis line on the face of the invoice.

Record-keeping for labs and practices

The records that make the VAT position defensible are simple but specific:

  • Patient-linked job records in the lab, so every prosthesis can be tied to a named patient's treatment and the exemption sustained.
  • Separation of prosthesis income from standard-rated product income, both in the lab and in the practice, so the taxable tail is identified and accounted for correctly.
  • Clear invoicing of any taxable element, splitting a standard-rated line out from an exempt prosthesis line on the same invoice rather than mislabelling the whole invoice one way.

Common errors

  • Assuming everything a lab invoices is exempt. A standard-rated element (generic stock, a non-prosthesis product) on a lab invoice should be split out and charged VAT; the prosthesis line stays exempt.
  • Charging VAT on a named-patient prosthesis. A crown or denture for a named patient is exempt under Item 2A; charging VAT on it is an error that then leaves the practice trying to reclaim VAT it was never entitled to.
  • Treating a retail whitening kit as exempt because it is "dental". A separable product sold at reception is standard-rated, regardless of being dental in nature.
  • An external lab missing its own partial-exemption exposure. A lab with both exempt prosthesis supplies and standard-rated sales is itself partially exempt and has its own recovery limits.

One anonymised illustration: a practice that had been charged VAT on a named-patient prosthesis in error spent months trying to reclaim irrecoverable input VAT before the real fix surfaced. The answer was not a reclaim at all; it was correcting the invoicing at source so the exempt supply was charged correctly, which removed the VAT that should never have been there. The lesson of the whole lab chain is the same: get the liability right at the point of invoice, and the recovery question largely takes care of itself.