MT 2025 State Instructions
The Montana Department of Revenue provides detailed instructions for filing the 2025 Montana Individual Income Tax Return (Form 2). These instructions guide taxpayers through the process of reporting income, calculating tax liability, and claiming credits or deductions specific to Montana.
Key Features of the 2025 Instructions
- Filing Requirements and Deadlines: The instructions outline who must file, including residents, nonresidents, and part-year residents, along with the due date for the 2025 return.
- Montana Source Income: Taxpayers must report income sourced to Montana, including business income from pass-through entities and capital gains from assets held in Montana or while a resident.
- Net Long-Term Capital Gains: Instructions detail how to calculate Montana source net long-term capital gains. Taxpayers must determine the ratio of Montana-sourced gains to total federal net long-term capital gains and apply it to the federal tax to find the Montana tax liability.
- Pass-Through Entities: For income from pass-through entities (e.g., partnerships, S corporations), taxpayers must report adjustments from Montana Schedule K-1, Part III, and use the difference between Column B, line 1 and line 2.
- Estimated Tax Payments: The 2025 instructions reference Publication 1 (ESW) for guidance on estimated tax payments, including worksheets for individuals, estates, and trusts.
Important Notes
- Nonresidents must report only Montana-sourced income, including net long-term capital gains attributable to Montana.
- Business income from activities outside tribal reservations cannot be sourced to the reservation. However, income from pass-through entities may be sourced using a reasonable method if applicable.
- Taxpayers with unique situations not covered in the instructions are advised to consult Title 15 of Montana law at leg.mt.gov or contact the Department of Revenue.
Source:
Montana Individual Income Tax Return Form 2 Instructions
Publication 1: A Guide to Montana Tax Withholding and Estimated Payments
Form EST-I: Interest on Underpayment of Estimated Tax for Individuals, Estates, and Trusts
Disclaimer: Always verify information with official Federal or State Department of Revenue Forms and Instructions.