Modifies provisions relating to income tax
HB1112 would substantially revise Missouri’s individual income tax structure and related deductions. The bill repeals and reenacts sections governing the state income tax rate schedule, the standard no-tax threshold, and the deduction for federal income taxes paid. Under the proposal, Missouri would continue a graduated income tax structure through tax year 2025, with the top rate reduced to 4.95% beginning in 2023, and then move to a flat 4% individual income tax rate for tax years beginning on or after January 1, 2026. The bill also preserves a $1,000 no-tax threshold for lower incomes and directs the Department of Revenue to adjust tax tables and publish rates as needed.
The bill further phases out the federal income tax deduction for both individual and corporate taxpayers. For individuals, the deduction would remain available through 2025, but beginning in 2026 there would be no federal income tax deduction. For corporations, the bill would allow the existing 50% federal income tax deduction through 2025 and then eliminate it starting in 2026. The bill also retains inflation indexing for brackets through 2025 and includes provisions tied to future revenue growth and, in one section, a possible constitutional amendment and tax reform fund mechanism for additional rate reductions.
The bill’s impact on state law would be significant because it would replace multiple existing income tax provisions with new language, simplify the rate structure, and reduce or eliminate several deductions that currently lower taxable income. It would affect resident taxpayers, corporate taxpayers, and the Department of Revenue, which would be responsible for implementing the new tables and rates by rule and website publication. In practical terms, the measure would likely broaden the tax base while lowering the top marginal rate over time, with the largest structural change occurring in 2026 when the flat tax and deduction changes take effect.
There is little recorded committee or floor discussion in the provided materials, and no vote history is included, so overall sentiment cannot be measured from debate or recorded amendments. Based on the bill text alone, the proposal appears oriented toward tax simplification and rate reduction, which typically appeals to tax-cut advocates, but it also removes deductions that benefit taxpayers and businesses, which could draw concern from those worried about regressivity or revenue effects. The bill’s phased implementation and revenue-triggered reduction mechanisms suggest an attempt to balance tax relief with fiscal safeguards.
Notable points of contention would likely include the shift from a graduated tax to a flat tax, the elimination of the federal income tax deduction, and the timing of the 2026 changes. Supporters may view the bill as pro-growth and easier to administer, while opponents may argue it favors higher-income taxpayers or could reduce state revenue stability. The bill also contains complex trigger provisions and references to a future tax reform fund amendment, which could raise questions about implementation and long-term budget impacts.
HB1112 would repeal and replace Missouri’s current income tax rate and deduction provisions in sections 143.011, 143.021, and 143.171, RSMo. It would keep the existing graduated rate structure only through tax year 2025, reduce the top rate to 4.95% beginning in 2023, and then impose a 4% flat individual income tax rate beginning in 2026. It would also eliminate the federal income tax deduction for individuals and corporations starting in 2026, while preserving the deduction through 2025 under current percentage rules. The Department of Revenue would be required to adjust tax tables and publish the applicable rates, and taxpayers, especially residents and corporations, would be directly affected by the new base, rate, and deduction rules.
Because no committee transcripts or votes are provided, there is no recorded public debate to summarize. The bill text suggests a generally pro-tax-cut, pro-simplification policy direction, which would likely be viewed favorably by supporters of lower income taxes and a flatter tax structure. At the same time, the elimination of deductions and the potential distributional effects of a flat tax would likely generate caution or opposition from lawmakers and stakeholders concerned about fairness, revenue adequacy, and impacts on lower- and middle-income taxpayers.
The main likely points of contention are the move to a flat 4% income tax, the elimination of the federal income tax deduction, and the revenue triggers tied to future rate reductions. Supporters would likely argue that the bill simplifies the tax code and lowers rates, while critics may contend that it shifts the tax burden, reduces deductions that currently benefit taxpayers, and could create uncertainty for state revenues. The bill’s phased implementation, inflation adjustments, and references to a future tax reform fund also suggest possible debate over whether the triggers are realistic and whether the state can afford the proposed reductions.