09/23/2026
Washington has a new state income tax on the horizon. The "Millionaires' Tax" (SB 6346) takes effect January 1, 2028, imposing a 9.9% tax on income over $1 million a year. It won't affect most households, but if you're approaching that threshold, the planning window is nowβnot in 2027.
Read our full breakdown of what's taxed, what's exempt, and how to start planning.
Washington now has a new state income tax on the books. Governor Bob Ferguson signed Senate Bill 6346 into law on March 30, 2026, creating a 9.9% tax on individual or household income exceeding $1 million per year. If your income puts...