Will Missouri voters approve Amendment 5 to phase out the state income tax on August 4?
Community missed this one โ 100% predicted YES.
Missouri voters rejected Amendment 5 in the August 4, 2026 statewide election, defeating a measure that would have directed the state legislature to phase out Missouri's individual income tax over five years while expanding and increasing sales and use taxes to offset the revenue loss. The measure failed by a wide margin, with reported results ranging from roughly 82 percent to 18 percent to 83 percent to 16 percent against passage, depending on the source and reporting stage. Supporters, including Republican Governor Mike Kehoe, had argued the phaseout would make Missouri more economically competitive and attract jobs. Opponents said shifting the tax burden to an expanded sales tax would raise everyday costs, particularly for low- and fixed-income households. A related measure, Amendment 4, which would have changed how constitutional amendment votes are counted, also failed by a similarly large margin. Missouri's state income tax remains in place following the vote. The Predict Six community consensus on this question was 100 percent YES (from two votes), which did not match the actual outcome.