Income from medical spa services is taxable under the Service and Other Activities business and occupation (B&O) tax classification, and you do not have to collect sales tax. Examples of these services include:
- Botox & dermal fillers.
 - Platelet Rich Plasma (PRP).
 - Microneedling.
 - Ultrasonic body sculpting.
 - Laser treatments.
 - Chemical peels.
 
References
RCW 82.04.290 Tax on service and other activities
RCW 82.08.0281 Exemptions-Sales of prescription drugs
WAC 458-20-224 Service and other business activities
  
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