Missouri voters set to decide four constitutional amendments in Aug. 4 primary
Missouri voters are scheduled to decide four constitutional amendments in the state’s Aug. 4, 2026, primary election after Gov. Mike Kehoe announced their placement on the ballot from Jefferson City on June 1.
The statewide ballot measures include one concerning a phaseout of Missouri’s income tax, according to the governor’s office. The measures have been placed before voters but have not been approved; their effect depends on the results of the Aug. 4 election.
Tax proposal is part of the ballot package
Kehoe’s announcement identified an income-tax phaseout measure among the four constitutional amendments. The available materials do not provide the full ballot wording, implementation timetable or other details needed to determine how any phaseout would operate if voters approve it.
The governor described modernization of Missouri’s tax code as a major task for the Missouri General Assembly. That statement identifies a legislative policy priority, but it does not establish a final tax-policy outcome or an immediate repeal of the state income tax.
For voters, the distinction is consequential: the Aug. 4 ballot is the decision point for the proposed constitutional changes, not evidence that a tax change already has taken effect.
Amendment procedures are also at issue
The ballot package also involves constitutional-amendment procedures. Recent reporting from Jefferson City identified a proposal that would impose a tougher standard for citizen-led constitutional amendments. The Associated Press reported that the proposal would make such amendments harder to enact and that it had generated divisions.
The source packet does not provide the exact voting threshold for that proposal, its complete ballot language, or whether and how it would apply after an election. Those details should be determined from the official ballot text rather than inferred from a description of the proposal.
Missouri’s secretary of state maintains the official record for 2026 initiative petitions approved for circulation, including ballot-title information. That record is a separate official resource for checking petition and ballot-title details as voters prepare for the primary.
What happens next
The next confirmed step is the Aug. 4, 2026, primary election, when Missouri voters will decide the four proposed constitutional amendments. The available sources do not provide final campaign positions for every amendment, vote totals connected to the measures, or full text for each question.
Until voters act, the measures remain proposals on the ballot. The official wording is particularly important for assessing the scope of the income-tax proposal and any change to rules governing citizen-led constitutional amendments.
Sources
- Governor Kehoe Places Four Constitutional Amendments on August Primary Election Ballot, Office of Missouri Governor Mike Kehoe
- Missouri proposal would create nation's toughest standard for citizen-led constitutional amendments, Associated Press
- 2026 Initiative Petitions Approved for Circulation in Missouri, Missouri Secretary of State
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