Under a proposed 9.9% Washington millionaires' tax, Seattle's highest earners could face top rates of more than 18% on wage income and (importantly for Seattle) the vesting of restricted stock units, the highest state and local combined rate in the nation.

The impact on Washington's tech community will be devastating. https://t.co/UX9EfOfOHH

— Vijay (@VijayInWA) January 16, 2026