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Montana Department of Revenue

Our Mission: To be the nation's most citizen-oriented, efficiently administered, state tax agency.

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2024

Tax Simplification Resource Hub

Tax Year 2024 Resources for Individuals and Estates and Trusts
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Upcoming Events and Due Dates

31

Mar

Rules Hearing for MAR Notice No. 2025-42.1 – Amendment of ARM 42.20.454 to lessen certain procedural burdens for a property owner during an informal classification and appraisal review and clarify department processes for it to consider sale price as an indication of market value for the owner's property -- [NEEDS UPDATED]

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Recent News and Updates

Tax Simplification Updates

Tax Simplification Changes Now in Effect for Montana

Taxpayers preparing their 2024 Montana tax return may be noticing the effect of Senate Bill 399 from the 2021 Legislature. The bill aligns the Montana tax system more closely to ... Tax Simplification Changes Now in Effect for Montana
Income Tax Miscellaneous Updates Wage Withholding

Check and Update Your 2025 Montana Tax Withholding

Individuals may be seeing different refund amounts on their 2024 Montana tax returns than they experienced in the past. The Montana Department of Revenue (DOR) encourages Montana taxpayers to review ... Check and Update Your 2025 Montana Tax Withholding

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