Tax Cuts vs Revenue: Idaho vs Washington Income Tax Debate
The Center Square YT
•April 18th, 2026
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A new report is fueling the debate over income taxes — showing that Idaho lowered its income tax rates and saw revenue nearly double.
So what does that mean for Washington State, which is preparing to implement a new 9.9% income tax on high earners?
In this episode of Washington In Focus Daily, we break down the numbers and the policy debate shaping the future of taxation in the region.
📊 Key findings from Idaho:
Income tax rate reduced from ~7.4% to 5.3% (flat tax)
Income tax revenue increased from $1.16 billion to $2.26 billion
That’s a 95% increase in revenue despite lower tax rates
💰 Washington’s situation:
New income tax targeting income above $1 million
Ongoing debate over long-term economic impact
Concerns about how multiple taxes (sales, gas, property, income) affect residents and businesses
We also explore:
The argument that lower taxes can grow the economy and expand the tax base
Whether Idaho is a fair comparison to Washington
The broader question: Do tax cuts increase or decrease government revenue?
🔔 Subscribe for more coverage on taxes, economic policy, and state-level debates.
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