Missouri Income Tax Elimination Calculator
Explore paths to eliminating Missouri's individual income tax — pick a starting point, dial in the assumptions, and watch the household and state impacts update.
Missouri Income Tax Elimination
Missouri House Joint Resolutions 173 and 174 propose a constitutional amendment that would authorize the General Assembly to reduce or eliminate Missouri's individual income tax. Because the measure amends the state constitution, it must be ratified by Missouri voters in a statewide referendum before taking effect. The resolutions do not prescribe a specific implementation path — they do not set a timeline, a trigger formula, or mandated revenue offsets, leaving those details to subsequent legislation. This dashboard allows users to examine several plausible elimination paths and their projected effects on households and state revenue.
Proposal
A constitutional amendment authorizing the General Assembly to reduce or eliminate the individual income tax. Ratification requires approval by Missouri voters in a statewide referendum.
Current law
Missouri's 2025 income tax has eight brackets ranging from 0% to a 4.7% top rate — one of the lower top rates among states that levy an income tax.
Scenarios modeled
Three reform types are available: a percentage-point reduction applied to every bracket rate, a cap on the top marginal rate, or elimination of the top bracket.
Methodology and limitations
Results are static estimates that do not incorporate behavioral responses. State revenue impacts are projected for fiscal years 2027–2035 using PolicyEngine's microsimulation of Missouri tax units.
Missouri 2025 income tax brackets
| Bracket | Rate |
|---|---|
| $0 – $1,313 | 0% |
| $1,313 – $2,626 | 2% |
| $2,626 – $3,939 | 2.5% |
| $3,939 – $5,252 | 3% |
| $5,252 – $6,565 | 3.5% |
| $6,565 – $7,878 | 4% |
| $7,878 – $9,191 | 4.5% |
| $9,191+ | 4.7% |
Bracket thresholds are inflation-adjusted each year. 2025 values shown.