Senate Bill 6114 amends RCW 82.02.010 and RCW 82.45.032 to add and clarify excise-tax definitions and administrative requirements. It defines "fixture" by reference to RCW 82.45.032 and provides a detailed statutory definition of "affixed" for purposes of excise tax law. The bill also directs the Department of Revenue to publish annually which counties qualify as "frontier" counties based on population density data from the Office of Financial Management, and authorizes the department to adopt rules to administer the definitions in RCW 82.45.032. The bill’s definition of "fixture" lists objective criteria that make property a fixture for excise tax purposes (necessary or integral to the real property as shown by documentation; designed for or used with the real property; or requiring special equipment or alteration to move). The determination must ignore the intent of the person affixing the property, property tax classification under Title 84 RCW, characterization under the Uniform Commercial Code, and buyer-seller or lessor-lessee agreements. The statutory definition of "affixed" includes being secured by weight, fastened, integrated into a structural element, or partially buried, and expressly states that attachment solely by a quick-disconnect conduit (for example, power or electronic cabling) does not make property affixed. The bill sets frontier county thresholds at fewer than 50 persons per square mile, with "frontier one" at 21 or fewer and "frontier two" at more than 21 but fewer than 50. Affected entities named in the text include the Department of Revenue, the Director of the Department of Revenue, the Office of Financial Management, counties (as classified under RCW 82.14.370), and taxpayers or persons liable for fees collected by the department. The bill was read for the first time on 01/14/26 and referred to the Committee on Ways & Means. The extracted material references other statutes for incorporated definitions (for example RCW 69.50.101, RCW 46.04.302, RCW 46.04.622) that are not included here, and the chunk does not show the full bill text or any other possible amendments, so broader effects on other tax provisions or complete statutory changes are not shown.

If enacted, the bill gives the Department of Revenue clear definitions of when personal property becomes a "fixture" or is "affixed" for excise tax purposes and requires the department to publish each year which counties meet a low population density threshold (frontier, frontier one, frontier two) determined by the Office of Financial Management. Practically, that will change how some installations and equipment—things like machinery, built-in appliances, irrigation, or other items that are attached, embedded, or require special equipment to move—are treated for tax purposes, which can shift who owes tax, when it is owed, or whether an item is treated as part of real property. The department also gains an administrative duty to publish the frontier list and authority to make rules to apply these definitions. The groups most affected are property owners, businesses, contractors, and taxpayers who install or sell items that might be classified as fixtures, because classification could alter their tax liabilities or compliance obligations, and counties that gain or lose frontier status because that designation feeds into other tax provisions referenced in statute. The Department of Revenue will have modest new workload and rulemaking responsibilities; taxpayers may face new compliance or recordkeeping costs to show an item meets (or does not meet) the fixture criteria. The extracted text does not show the specific tax consequences tied to fixture status or how these definitions interact with all other tax rules, so the exact financial impact on any given taxpayer or county is unclear from the provided facts.