Montana Does Have a State Income Tax
Yes, Montana has a state income tax. Unlike a handful of states that do not tax wages at all, Montana taxes the income of residents and non-residents who earn money within the state. The tax applies to wages, self-employment income, investment gains, and other forms of income, though some types are excluded or taxed differently.
Montana's income tax rates are progressive, meaning the percentage you pay increases as your income rises. The state has ten tax brackets, ranging from 1% on the lowest incomes to 6.9% on the highest. This is lower than many states but higher than some neighboring states like Wyoming and Nevada, which have no income tax at all.
Key Takeaways
- Montana taxes resident income at rates between 1% and 6.9%, depending on how much you earn.
- Non-residents who work in Montana or earn Montana-source income must also pay state income tax on that income.
- Social Security benefits are not taxed by Montana, and certain retirement income may may have access to for partial exemptions.
- Montana allows a standard deduction that reduces the income you actually pay tax on, similar to the federal system.
- You file Montana taxes using Form 2, the state's individual income tax return, usually due the same day as your federal return.
Montana's Tax Brackets and Rates
Montana's ten tax brackets explore to your taxable income after you subtract the standard deduction. For the 2024 tax year, the standard deduction for a single filer is $4,470 and for married filing jointly is $8,940. These amounts change each year based on inflation.
The brackets themselves are adjusted annually. The lowest bracket starts at 1% and applies to the first portion of your income. As your income increases, each additional dollar is taxed at a higher rate until you reach the top bracket of 6.9%. The exact income ranges for each bracket change year to year, so you will want to check the Montana Department of Revenue website for the current year's brackets before calculating your tax.
Because Montana's top rate of 6.9% is relatively modest compared to states like California (13.3%) or New York (10.9%), residents with high incomes may find Montana's tax burden lower than in other states. However, this does not account for property taxes, sales taxes, or other state and local levies that vary by location.
Who Must Pay Montana Income Tax
Montana residents must pay income tax on all income from any source, whether earned in Montana or elsewhere. A resident is generally someone who lives in Montana for more than six months of the year or maintains a permanent home there.
Non-residents must pay Montana income tax only on income earned within the state. This includes wages from a Montana employer, self-employment income from a Montana business, rental income from Montana property, and capital gains from the sale of Montana real estate. If you work remotely for an out-of-state company while living in Montana, you owe Montana tax on those wages.
If you moved to Montana during the year, you may owe tax as a resident for only part of the year. The state allows you to report income on a part-year resident return, which calculates your tax based on the months you actually lived there.
Income That Is Not Taxed in Montana
Montana excludes certain types of income from state taxation. Social Security benefits are not taxed by the state, regardless of your total income. This is one of the more generous provisions for retirees compared to some other states.
Military retirement pay is also exempt from Montana income tax. If you are a retired member of the U.S. Armed Forces, you do not owe state tax on your military pension. Additionally, some types of retirement income may may have access to for partial exemptions, though the rules are specific and depend on your age and the source of the income.
Interest and dividends from certain municipal bonds are not taxed by Montana if they are exempt from federal tax. However, most investment income—including capital gains, interest from savings accounts, and dividends from stocks—is fully taxable at the state level.
Filing Your Montana Income Tax Return
You file Montana income taxes using Form 2, the state's individual income tax return. This form is due on the same date as your federal return, which is typically April 15 unless that date falls on a weekend or holiday. If you file your federal return late using an extension, your Montana return is also extended to the same date.
You can file your Montana return on paper by mailing it to the Montana Department of Revenue, or you can file electronically through the state's online system or through tax software that supports Montana returns. Electronic filing is faster and reduces the chance of errors, and the state encourages it.
If you owe Montana tax, you must pay it by the April 15 important date to avoid penalties and interest. If you expect a refund, filing electronically usually results in a faster refund than filing on paper. The state typically processes refunds within four to six weeks of receiving your return.
Deductions and Credits Available in Montana
Montana allows a standard deduction that works similarly to the federal standard deduction—you subtract this amount from your income, and you only pay tax on what remains. You can also itemize deductions if your total itemized deductions exceed the standard deduction, though fewer taxpayers do this since the federal standard deduction increased in recent years.
The state also offers several tax credits that can reduce the amount of tax you owe. These include credits for dependent children, education expenses, property taxes paid, and certain types of retirement savings. Some credits are refundable, meaning you can receive money back even if you owe no tax, while others straightforward reduce your tax bill to zero.
If you are self-employed, you can deduct half of your self-employment tax on your Montana return, just as you can on your federal return. You can also deduct business expenses, home office costs, and other ordinary business expenses, provided you keep records to support the deductions.
What Happens If You Do Not Pay Montana Income Tax
If you owe Montana income tax and do not pay it by the important date, the state charges interest on the unpaid amount. The interest rate is set quarterly and is currently around 7% per year, though it changes. You also face penalties—typically 5% of the unpaid tax for the first month late, plus an additional 5% for each month after that, up to a maximum of 25%.
If you do not file a return at all, the penalties are steeper. The failure-to-file penalty is 10% per month, up to a maximum of 50%. The state may also file a return on your behalf based on information it receives from employers or financial institutions, and that return may not include deductions or credits you would have claimed.
The Montana Department of Revenue can place a lien on your property or garnish your wages to collect unpaid taxes. If you cannot pay the full amount, you may be able to set up a payment plan with the state, which typically requires monthly payments and still accrues interest.
Frequently Asked Questions
Does Montana tax retirement income differently than wages?
Montana does not tax Social Security or military retirement pay, but it does tax other retirement income like distributions from IRAs and 401(k)s at the same rates as wages. Some retirement income may may have access to for partial exemptions depending on your age and the source, so check the current rules on the Montana Department of Revenue website or consult a tax professional.
If I work in Montana but live in another state, do I owe Montana income tax?
Yes, you owe Montana income tax on the wages you earn in Montana, even if you live elsewhere. However, you may also owe tax in your home state. Most states allow a credit for taxes paid to another state to avoid double taxation, but the rules vary, so review your home state's rules or speak with a tax professional.
What is the difference between Montana's tax rate and the federal tax rate?
Montana's top rate is 6.9%, while the federal top rate is 37%. Both use progressive brackets, so you pay different rates on different portions of your income. You owe both Montana and federal tax on the same income—they are separate taxes that do not reduce each other.
Can I deduct federal taxes paid from my Montana income tax?
No, Montana does not allow you to deduct federal income taxes paid. However, you can deduct state and local property taxes up to a certain limit, and you can deduct other expenses like business costs, charitable donations, and mortgage interest if you itemize deductions.
Where do I find the current Montana tax brackets and standard deduction?
The Montana Department of Revenue publishes current tax brackets and standard deductions on its website each year. You can also find this information in the instructions that come with Form 2, or by calling the department's taxpayer information line.