(MISSOURI) — Missouri Gov. Mike Kehoe placed a constitutional amendment on the August 4, 2026 primary election ballot that would phase out and eliminate the state’s individual income tax.

The proposal will appear as Amendment 5 (HJR 173/174). Kehoe announced the ballot placement by signing the relevant proclamations.

If voters approve it, the measure would phase out and eliminate Missouri’s individual income tax based on revenue growth. It would also require reductions in property taxes and other local taxes to offset any local sales tax revenue increases, while preserving local funding for public schools.

Kehoe cast the move as a tax-code overhaul that still leaves time for lawmakers to prepare. “Modernizing Missouri’s outdated tax code, specifically, will be a momentous task for the Missouri General Assembly, and placing the measure to phase out Missouri’s income tax on the August ballot gives lawmakers additional time to prepare for the next phase of implementation.”

He also tied the proposal to broader voter support for economic policy changes. “As Missourians continue supporting policies that make our state more competitive, we want to ensure the legislature is positioned to act responsibly following the direction of the voters.”

The announcement places Amendment 5 among several statewide questions set for the same ballot. Missouri voters on August 4, 2026 will also see Amendment 1, Amendment 2 (HJR 23/3), and Amendment 4 (HJR 3).

Kehoe’s action moves the tax question from the Capitol to the statewide ballot, where voters will decide whether to add the proposal to the Missouri Constitution. The governor’s statement framed that step as part of a longer legislative process rather than an immediate change to tax collections.

Under the measure’s language, the phaseout would proceed based on revenue growth. The legislature would still need to define the metrics used for that growth and act on the mechanics of the reductions described in the amendment.

That legislative role extends beyond the individual income tax itself. Lawmakers would need to implement the tax reductions tied to any local sales tax revenue increases and maintain the protection for local public school funding set out in the proposal.

The proposal combines three tax-related commitments in a single ballot question: ending the state’s individual income tax over time, requiring offsetting reductions in certain local taxes, and preserving school funding at the local level. Each of those pieces would shape how Missouri carries out any shift away from income tax collections if voters approve the amendment.

Kehoe’s statement emphasized timing as much as policy. By putting the measure on the primary ballot, he said, lawmakers would have additional time to prepare for implementation after voters weigh in.

Missouri now heads toward a summer ballot that includes a direct vote on one of the state’s central revenue questions, with Amendment 5 asking whether future revenue growth should trigger the phaseout and eventual elimination of the individual income tax while local tax offsets and school funding protections remain in place.