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Who Has To Pay Income Tax In Montana?

Posted on July 11th, 2025

Montana’s income tax system is designed to ensure that individuals who live or earn income in the state contribute to its public services. If you’re wondering whether you’re required to pay income tax in Montana, the answer typically depends on two key factors: whether you’re a Montana resident or a nonresident with income connected to the state. Our lawyers at Silverman Law Office, PLLC can help you:

1. Montana Residents

Montana residents are required to pay income tax on all income, regardless of where it’s earned. This includes wages, self-employment income, investment returns, rental income, and any other taxable income, whether sourced in Montana, another state, or even another country.

Who Qualifies as a Montana Resident?

For tax purposes, Montana considers you a resident if it’s your permanent home, also known as your domicile. Even if you temporarily live outside the state, you’re still considered a resident if you maintain significant ties to Montana, such as owning property, maintaining a Montana driver’s license, or keeping your voter registration in the state.

This “all-income rule” applies to all residents because Montana law assumes that, as a resident, you benefit from the state’s resources, infrastructure, and public services regardless of where your income originates.

2. Nonresidents With Montana-Connected Income

Nonresidents are taxed only on income earned within Montana or income directly connected to Montana-based activities. Unlike residents, nonresidents are not subject to tax on income earned in other states or countries.

What Counts as Montana-Connected Income?

Montana-connected income includes:

  • Wages from work performed in Montana.
  • Business income from activities conducted in the state.
  • Rental income from properties located in Montana.
  • Capital gains from the sale of Montana-based assets, such as real estate or investments tied to the state.

For example, if you live in a neighboring state like Idaho but commute to Montana for work, the wages you earn in Montana are taxable by the state. Similarly, if you live elsewhere but own and rent out property in Montana, the rental income is subject to Montana tax.

Montana’s income tax system also applies to part-year residents, or individuals who lived in Montana for part of the year and another state for the rest. These individuals are required to pay taxes on income earned during their time in Montana and any Montana-connected income received while living elsewhere.

Final Thoughts

Whether you’re a full-time Montana resident or a nonresident earning Montana-based income, understanding your tax obligations is essential to avoid penalties and ensure compliance. Montana’s tax system is designed to fairly distribute the cost of public services among those who live, work, or do business in the state.

If you’re unsure about your residency status or how Montana tax laws apply to your situation, consulting a tax professional or attorney can help provide clarity and peace of mind. Call us at 406-582-8822 or visit https://mttaxlaw.com/contact/ for assistance from our legal team.

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Fill out the form below to get in touch with our legal team or call Bozeman office at (406) 582-8822, Helena office at (406) 449-4829, Big Timber office at (406) 430-6600, or Butte office at (406) 299-8131 to talk to someone right away.

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Butte, MT 59701

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