In Align Technology Switzerland GmbH & Anor v HMRC [2025] TC09499, the First Tier Tribunal (FTT) found that orthodontic aligners were VAT-exempt dental prostheses.

Dentist

Align Technology Switzerland GmbH (Align) supplied clear aligners under the brand ‘Invisalign’.

  • Aligners are removable orthodontic appliances used by dentists to reposition a patient’s teeth to correct misalignment, improving the functionality of the patient’s bite.
  • Each aligner is bespoke and is specially designed by Align for an individual patient, based on a scan of the patient’s mouth and following the treatment plan prescribed by the dentist.
  • For VAT purposes, Align treated the supply of its aligners as Exempt supplies of dental prostheses. HMRC issued decisions that the aligners were standard-rated. Align Appealed to the First Tier Tribunal (FTT).

The issue in the appeal was whether the Aligners were ‘dental prostheses’ within Items 2 and 2A of Group 7, Schedule 9, VATA 1994. These are: 

  • Item 2: the supply of any services consisting of the provision of medical care, or the supply of dental prostheses, by:
    • A person registered in the dentists’ register.
    • A person registered in the dental care professionals register established under section 36B of the Dentists Act 1984.
  • Item 2A: the supply of any services or dental prostheses by a dental technician.

The FTT found that:

  • The term ‘dental prostheses’ is not defined in UK legislation.
  • Two out of the three specialist dentistry dictionaries consulted by the FTT included ‘orthodontic appliances’ in their definitions of ‘dental prostheses’.
    • The two dictionaries that did so were more recently revised and were therefore more likely to represent the current view of doctors and dentists about the meaning of ‘dental protheses’.
  • The aligners were considered to be ‘orthodontic appliances’ by HMRC and the taxpayers.
  • The aligners, therefore, met the definition of ‘dental prostheses’.

The appeal was allowed.

Useful guides on this topic

Health and welfare: VAT
When do reduced rating, zero-rating and VAT exemption apply to services relating to medical care, health and welfare? What are the rules? 

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Align Technology Switzerland GmbH & Anor v HMRC [2025] TC09499