Concerning the tax treatment of pilates studios and gymnastics facilities.

SB 5411 reenacts and amends Washington's definition of "sale at retail" (RCW 82.04.050) to clarify tax treatment for various services, including those provided by fitness facilities. The bill does not create new tax exemptions for pilates studios or gymnastics facilities; instead, it updates existing definitions of taxable retail sales to include services like installing or improving fitness equipment. Key provisions specify that charges for labor/services related to tangible personal property (e.g., facility maintenance, equipment installation) are taxable under current retail sales rules. This bill affects all businesses subject to Washington's retail sales tax, not just fitness studios, by refining how certain services are classified for tax purposes. The title misleadingly suggests specific treatment for fitness facilities, but the actual text modifies general tax definitions without targeting those businesses.