WA HB1558

Establishes a dedicated Business & Occupation (B&O) tax rate of 0.484% for radio and television broadcasting businesses in Washington State, moving this category into its own section of RCW 82.04

Excludes network, national, and regional advertising revenues from taxable gross income for broadcasters, calculated either through a standard deduction based on U.S. Census Bureau data or through individual station itemization

Allows broadcasters using itemization to exclude out-of-state audience revenue based on FCC signal strength contour measurements for AM radio, FM radio, and television channels

Defines "radio and television broadcasting" as delivery of audio, video, and written information by FCC-licensed stations, including delivery by wire, satellite, or other means

Exempts this act from tax preference performance statement requirements under RCW 82.32.805 and 82.32.808