MO HB3115

Amends Missouri's homestead property tax credit program (Section 137.1055) by expanding the list of eligible counties through detailed population-based definitions for both "five percent counties" and "zero percent counties"

"Five percent counties" may increase a homeowner's baseline property tax liability by no more than 5% annually or the Consumer Price Index increase, whichever is greater; "zero percent counties" cannot increase liability above the 2024 initial credit year amount

Requires eligible counties to place a ballot measure before voters by the April 2026 municipal election to approve granting the property tax credit to homestead owners

Counties transitioning from "five percent" to "zero percent" status on January 1, 2028 must hold a new ballot measure in April 2028

New construction, improvements, or annexation into new taxing jurisdictions will adjust the baseline tax liability; taxpayers cannot claim this credit simultaneously with the credit under Section 137.1050