How Does an Extra 9.9% Washington State Income Tax Sound
If passed, Washington state will have an income tax of 9.9% on income over $1 million.
In a previous post we discussed the Washington State Estate Tax. In today’s post we review a proposal to implement a 9.9% income tax on Adjusted Gross Income over $1 million.
As the 2026 legislative session progresses, Washington state is moving closer to a fundamental shift in its tax structure with the introduction of Senate Bill 6346 and House Bill 2724—collectively known as the “Millionaire’s Tax”. This bill would impose a 9.9% tax on personal income exceeding $1 million.
The Federal AGI Starting Point
