WA SB5774

Amends RCW 82.04.4281 to clarify the business and occupation (B&O) tax deduction for investment income following uncertainty created by the state supreme court decision in Antio, LLC v. Department of Revenue

Adds a statutory definition of "investment" to include equities, fixed income instruments (bonds, notes, commercial paper, savings deposits, mortgage loans), derivative instruments (options, futures, swaps), and commodities instruments

Adds a definition of "factoring" (purchase, sale, and collection of accounts receivable) to clarify what is excluded from the investment income deduction

Modifies the 5% gross receipts threshold for deductible intercompany loan income by removing "investment and" so only loan income counts toward the threshold

Applies retroactively but explicitly does not create a right of refund for taxes paid on investment income before the effective date