Ferguson poised to sign ‘millionaires tax’ into law in Washington Gov. Bob Ferguson is expected to sign a bill imposing a 9.9% income tax on earnings over $1 million in Washington.Share this: Gov. Ferguson to sign latest version of millionaire’s income tax proposalDateMarch 6, 2026In relation toKing 5 NewsHere are the bills signed into law this week in Washington stateDateMarch 14, 2026In relation toKing 5 NewsGov. Ferguson announces support for tax on state’s millionairesDateDecember 23, 2025In relation toKing 5 News