Montana does have a state income tax

Montana taxes your wages, self-employment income, interest, dividends, and other earnings at the state level. The state uses a progressive tax system, meaning the rate increases as your income rises. You will owe Montana state income tax if you lived in the state for any part of the tax year, worked there, or had income from Montana sources — even if you moved away during the year.

Montana's tax rates range from 1% on the lowest income bracket to 6.9% on the highest, as of the 2024 tax year. These rates change periodically, so you should confirm the current brackets before filing. The state also allows you to claim the standard deduction or itemize deductions, similar to federal taxes.

Key Takeaways

  • Montana imposes a progressive state income tax with rates from 1% to 6.9%, depending on your income level.
  • You owe Montana state tax if you lived in the state any part of the year, worked there, or earned income from Montana sources.
  • Montana allows you to claim either the standard deduction or itemize deductions on your state return.
  • You file Montana taxes using Form 2, the state's individual income tax return, which you submit to the Montana Department of Revenue.

Montana tax brackets and rates for 2024

Montana's tax brackets are adjusted each year for inflation. For the 2024 tax year, single filers face rates starting at 1% on income up to $3,300, then increasing through several brackets until reaching 6.9% on income over $18,700. Married filing jointly filers have higher income thresholds before moving into each bracket.

The exact dollar amounts for each bracket change annually. Before you file, check the Montana Department of Revenue website or your tax software to confirm the current year's brackets. Using outdated brackets will result in an incorrect tax calculation and may trigger a notice from the state.

Who must file a Montana state return

You must file a Montana state return if your income exceeds the filing threshold for your filing status. The threshold varies by age and filing status. A single person under 65 with income above the standard deduction amount must file, as must a married couple filing jointly if their combined income exceeds their threshold.

Even if you do not owe tax, you may want to file if you had Montana income tax withheld from your paychecks or made estimated tax payments. Filing allows you to claim a refund of any overpayment. Additionally, if you received certain tax credits — such as the earned income credit or property tax credit — filing is necessary to claim them.

Montana Form 2 and how to file

Montana's individual income tax return is Form 2. You file it with the Montana Department of Revenue, either by mail or electronically. Most tax software platforms, including TurboTax, H&R Block, and TaxAct, include Montana state forms and will walk you through the process step by step.

If you file electronically, the state typically processes your return faster and issues any refund within two to four weeks. If you mail a paper return, allow six to eight weeks. The filing important date is the same as the federal important date — usually April 15 — unless that date falls on a weekend or holiday.

Deductions and credits available in Montana

Montana allows you to claim the standard deduction, which reduces your taxable income. For 2024, the standard deduction amounts vary by filing status and age. You can also itemize deductions if your total itemized deductions exceed the standard deduction, though most filers benefit from the standard deduction.

Montana offers several tax credits that can reduce the amount you owe. The property tax credit helps renters and homeowners with property tax burdens. The earned income credit mirrors the federal version and benefits low- to moderate-income workers. The dependent and child care credit helps offset childcare costs. Credits are more valuable than deductions because they reduce your tax dollar-for-dollar rather than just reducing your taxable income.

What happens if you move out of Montana

If you moved out of Montana during the tax year, you may owe tax to both Montana and your new state for the portion of the year you lived in each place. Montana taxes you on income earned while you were a resident. Your new state may tax you on income earned after you moved there.

Some states offer credits for taxes paid to other states, which can reduce your total tax burden. You will typically file a part-year resident return with Montana showing only the income earned during the months you lived there. Your tax software can usually handle this calculation, but you should verify that it correctly split your income by state and filing period.

Montana tax withholding from paychecks

If you work in Montana, your employer should withhold state income tax from your paycheck. You provide a Montana W-4 form to your employer to indicate how much to withhold. The amount depends on your filing status, number of dependents, and other income sources.

If you do not have enough withheld during the year, you may owe tax when you file. If too much is withheld, you will receive a refund. You can adjust your withholding at any time by submitting a new W-4 to your payroll department. Self-employed individuals must make quarterly estimated tax payments to Montana instead of having taxes withheld automatically.

Frequently Asked Questions

Do I owe Montana tax if I worked there but moved away before the end of the year?

Yes, you owe Montana tax on income earned while you were a resident. File a part-year resident return showing only the income earned during the months you lived in Montana. Your new state will tax income earned after you moved there.

What is the Montana standard deduction for 2024?

The standard deduction varies by filing status and age. Check the Montana Department of Revenue website or your tax software for the exact amount for your situation. It increases slightly each year for inflation.

Can I file Montana taxes electronically?

Yes, most tax software platforms support Montana e-filing. You can also file electronically through the Montana Department of Revenue website. Electronic filing is faster than mailing a paper return and typically results in a quicker refund.

What if I did not have enough tax withheld during the year?

You will owe the difference when you file your return. To avoid this next year, adjust your W-4 with your employer or increase your quarterly estimated tax payments if you are self-employed.

Does Montana tax retirement income or Social Security?

Montana does not tax Social Security benefits. Retirement income from pensions and distributions from retirement accounts is taxable, though certain military pensions and some other retirement income may may have access to for exclusions. Check the Montana Department of Revenue for details on your specific situation.