Missouri Voters Reject State Income Tax Elimination by 82%+ Margin

Missouri voters defeated Amendment 5 on August 4, 2026, with 82.4% voting "no" and at least 1.1 million ballots cast across 95% of reporting precincts, per Fox 2 St. Louis. The legislatively referred constitutional amendment would have eliminated the state income tax and altered sales tax provisions. Missouri's income tax framework remains unchanged.