Modifies provisions relating to the calculation of income tax, establishing new progressive personal income brackets and repealing income tax subtractions for certain capital gains, with a referendum clause

HB 2975 changes Missouri's personal income tax structure by creating new progressive tax brackets and eliminating tax breaks for certain capital gains. It establishes a temporary top rate of 4.95% for 2023-2026 (down from 5.9%), with potential further reductions if state revenue exceeds specific thresholds. Starting in 2027, new brackets take effect with a 0% rate for income under $2,000, followed by 2.9% to 5.9% rates for higher income levels, adjusted annually for inflation. This bill directly affects all Missouri residents filing state income taxes, altering how their taxable income is calculated under the new rates and brackets.