The ballot measure would replace Colorado's flat 4.4% income tax with graduated rates, with some upper incomes facing rates above 8%.
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Should Colorado replace its flat income tax with a graduated tax system?
October 24, 2026
Colorado Voters to Decide on Tax Amendment 87The November 3, 2026, ballot initiative would replace the state's flat tax with a new graduated income tax system.
October 21, 2026
Colorado Weighs Plan to Hike Top Income Tax RateA new proposal suggests increasing the state's top income tax rate to 8.4 percent.
October 21, 2026
Colorado Suspends Family Affordability Tax Credit for 2026State revenue forecasts fell below the required threshold, triggering a suspension of the tax benefit.
October 20, 2026
Judge Reviews Colorado Income Tax Ballot MeasureA court hearing addressed allegations regarding signature collection validity for a proposed income tax reform.
October 7, 2026
Colorado Voters Will Decide on Tax Cap ProposalResidents will vote this November on Proposition 136, which seeks to set a 4.4% limit on state income tax rates.
September 25, 2026
Colorado Voters Will Decide Amendment 87 in 2026The proposed ballot measure would replace the state's flat 4.4% income tax with a graduated eight-tier system.
September 24, 2026
Opponents Challenged Colorado Amendment 87 Ballot StatusA legal challenge has been filed against the Colorado Secretary of State regarding a proposed tax measure.
