Align v HMRC: What the recent VAT decision means for dental laboratories and the wider dental sector

A significant decision

The recent Upper Tribunal decision in HMRC v Align Technology could have important VAT implications for dental laboratories, orthodontic providers and other businesses operating within the dental sector.

Although the case concerned Invisalign clear aligners, the tribunal’s interpretation of what constitutes a “dental prosthesis” may also be relevant when determining the VAT treatment of other dental and orthodontic appliances.

In July 2026, the Upper Tribunal overturned the earlier First-tier Tribunal decision and found in favour of HMRC. The central question was whether clear aligners constituted dental prostheses and could therefore qualify for VAT exemption.

The Upper Tribunal concluded that a dental prosthesis is an artificial item that replaces missing or damaged teeth. Because clear aligners reposition existing teeth rather than replace them, the tribunal found that they fell outside the exemption and were subject to VAT at the standard rate.

Why businesses should pay attention

The significance of the decision may extend beyond clear aligners. Laboratories and suppliers should consider whether the reasoning could affect the treatment of products such as retainers, occlusal splints, night guards, expanders, orthodontic appliances and mouthguards.

The correct VAT treatment will depend on the nature and function of each product, as well as the circumstances in which it is supplied. The decision does not mean that every dental appliance outside traditional crowns, bridges and dentures will automatically be taxable. However, it does provide a strong reason to review products that move, support, retain or protect existing teeth rather than replace missing or damaged teeth.

Where these products have historically been treated as exempt, businesses should consider whether that treatment remains supportable.

The potential commercial impact

For VAT-registered laboratories, a change from exempt to taxable supplies could present both opportunities and challenges. VAT may need to be charged on affected products, potentially increasing costs for customers who cannot recover it. At the same time, the laboratory may become entitled to recover input VAT that was previously restricted.

The impact could be more significant for laboratories that are not currently VAT registered. If supplies previously treated as exempt are instead taxable, they will count towards the VAT registration threshold. Some businesses may therefore find that they should already have registered for VAT.

Historical liabilities will depend on the individual circumstances, including when the registration obligation arose, the business’s conduct and the relevant statutory assessment time limits. In certain cases, HMRC can look back for an extended period, but a 20-year assessment window will not apply automatically to every business or enquiry.

What happens next?

The Upper Tribunal’s decision is binding on the First-tier Tribunal unless it is successfully appealed. Businesses should therefore review their VAT treatment based on the current legal position while monitoring any further developments.

This should include:

• Identifying products currently treated as exempt
• Reviewing the purpose and function of each product
• Checking whether taxable turnover could trigger VAT registration
• Considering the potential historical exposure
• Assessing whether additional input VAT may be recoverable
• Ensuring that the VAT treatment adopted is clearly documented and supportable

The Align decision is an important prompt for dental laboratories, orthodontic suppliers, manufacturers and healthcare providers to review their position. For some businesses, the implications may extend beyond clear aligners and affect VAT registration, pricing, contracts and previous supplies.

If you would like to discuss how the decision may affect your business, the K3 Tax Advisory VAT team can review your current VAT position, identify potential areas of exposure and advise on the most appropriate next steps.

Amanveer Singh: amanveer.singh@k3.tax

Damon Wright: damon.wright@k3.tax