Montana taxpayers would use filing-group thresholds for regular income and long-term gains, and the Department of Revenue would adjust both sets of brackets for inflation starting in 2026.
The proposal sets a 4.7% rate up to a filing-group threshold and a 5.9% rate on income above it. Thresholds range from $100,000 to $200,000.
The proposal sets a 3.0% rate on some long-term gains and a 4.1% rate on gains above a filing-group threshold. Other taxable income can lower that threshold or make all gains subject to the 4.1% rate.
The proposal uses an inflation measure based on June 2024 prices to adjust both sets of brackets each year, beginning in tax year 2026.
The proposal sets income-tax rates and thresholds for different filing groups. The proposed 4.7% rate applies to the first $200,000 for joint filers and surviving spouses, $150,000 for heads of household, and $100,000 for other individuals, separately filing married people, estates, and trusts. The 5.9% rate applies above each threshold. If approved, the proposal would apply to tax years beginning after December 31, 2024.
The proposal sets tax rates for net long-term capital gains. The proposal applies to net long-term capital gains for the same filing groups and uses thresholds of $200,000 for joint filers and surviving spouses, $150,000 for heads of household, and $100,000 for other individuals, separately filing married people, estates, and trusts. The lower-rate threshold is reduced by taxable income that is not net long-term capital gains. If that other income meets or exceeds the threshold for the filing group, all net long-term capital gains are taxed at 4.1%. If approved, the proposal would apply to tax years beginning after December 31, 2024.
The proposal directs the Department of Revenue to adjust the income and capital-gains brackets for inflation. The adjustment covers both regular income-tax brackets and net long-term capital-gains brackets. The department would multiply bracket amounts by the modified inflation factor and round cumulative brackets to the nearest $100. The modified factor uses the June 2024 consumer price index in place of the June 2023 index. The modified inflation factor would not apply until tax year 2026.
No hearings or votes scheduled.