Find Montana’s income tax rates, capital gains tax rates, and available deductions for 2025 and previous years. Tax Tables and Deductions 2025 Tax Rates and Deductions 2024 Tax Rates and Deductions 2023 Tax Rates and Deductions 2022 Tax Rates and Deductions 2021 Tax Rates and Deductions 2020 Tax Rates and Deductions 2019 Tax Rates and Deductions 2018 Tax Rates and Deductions 2017 Tax Rates and Deductions 2016 Tax Rates and Deductions 2015 Tax Rates and Deductions 2014 Tax Rates and Deductions 2013 Tax Rates and Deductions