Court battle ignites over Washington’s new income tax

By: Jerry Cornfield

Outlets: Washington State Standard

Published: April 9, 2026

Words: 1,183

Last Updated: 2 months, 1 week ago

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Opponents of Washington’s new income tax on high earners filed a lawsuit Thursday, arguing the controversial law is unconstitutional and in conflict with nearly a century of state Supreme Court precedent.

This marks the start of a much-anticipated legal brawl over the law, which Gov. Bob Ferguson signed late last month. Dubbed the “millionaires’ tax” by backers, it imposes a 9.9% tax on household wage earnings above $1 million a year.

“We are challenging …

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