Tax Year 2023 Montana Income Tax Brackets
| Tax Bracket | Tax Rate |
|---|---|
| $0.00+ | 4.7% |
| $20,500.00+ | 5.9% |
| Tax Bracket | Tax Rate |
|---|---|
| $0.00+ | 4.7% |
| $41,000.00+ | 5.9% |
Both Montana's tax brackets and the associated tax rates were last changed one year ago in 2023. Montana's tax brackets are indexed for inflation, and are updated yearly to reflect changes in cost of living.
Montana has two marginal tax brackets, ranging from 4.7% (the lowest Montana tax bracket) to 5.9% (the highest Montana tax bracket). Each marginal rate only applies to earnings within the applicable marginal tax bracket .
In Montana, different tax brackets are applicable to different filing types. Married couples filing their Montana income tax return jointly will usually have wider tax brackets than those filing separately or as an individual.
How do Montana tax brackets work?
Technically, you don't have just one "tax bracket" - you pay all of the Montana marginal tax rates from the lowest tax bracket to the tax bracket in which you earned your last dollar. For comparison purposes, however, your Montana tax bracket is the tax bracket in which your last earned dollar in any given tax period falls.
You can think of the bracketed income tax as a flat amount for all of the money you earned up to your highest tax bracket, plus a marginal percentage of any amount you earned over that. The chart below breaks down the Montana tax brackets using this model:
| For earnings between $0.00 and $20,500.00, you'll pay 4.7% |
| For earnings over $20,500.00, you'll pay 5.9% plus $963.50 |
| For earnings between $0.00 and $41,000.00, you'll pay 4.7% |
| For earnings over $41,000.00, you'll pay 5.9% plus $1,927.00 |
Montana Income Tax Calculator
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You can use the income tax estimator to the left to calculate your approximate Montana and Federal income tax based on the most recent tax brackets.
Keep in mind that this estimator assumes all income is from wages, assumes the standard deduction, and does not account for tax credits.
For a more detailed estimate that takes these factors into account, click "View Detailed Estimate" (this will will redirect to an external website).
Montana Tax Deductions
When calculating your Montana income tax, keep in mind that the Montana state income tax brackets are only applied to your adjusted gross income (AGI) after you have made any qualifying deductions.
Qualifying deductions might include an itemized deduction, the Montana standard deduction, exemptions for dependants, business expenses, etc.
Remember that Montana may have very different deduction laws from the Federal Income Tax, so you may have to write a whole new list of deductions for your Montana income tax return.
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MT income tax forms are available as PDFsMontana Standard Deductions & Personal Exemption Amounts
In addition to marginal tax brackets, one of the major features of the Montana income tax is deductions. The three most common deductions encountered by taxpayers are the Montana Standard Deduction, the Montana Personal Exemption, and the Montana Dependent Deduction. The current values of these deductions for tax year 2024 are as follows:
| Standard Deduction (Single) | Standard Deduction (MFJ) | Personal Exemption | Dependant Exemption |
|---|---|---|---|
| $14,600.00 | $29,200.00 | $0.00 | $0.00 |
The standard deduction, which Montana has, is a deduction that is available by default to all taxpayers who do not instead choose to file an itemized deduction. Essentially, it translates to $14,600.00 per year of tax-free income for single Montana taxpayers, and $29,200.00 for those filing jointly.
The Personal Exemption, which is not supported by the Montana income tax, is an additional deduction you can take if you (and not someone else) are primarily responsible for your own living expenses. Likewise, you can take an additional dependent exemption for each qualifying dependent (like a child or family member), who you financially support.
The Federal income tax also has a standard deduction, personal exemptions, and dependant deductions, though they are different amounts than Montana's and may have different rules.
Head over to the Federal income tax brackets page to learn about the Federal Income Tax, which applies in all states nationwide.
Sources & Citations
Disclaimer: While we do our best to keep this list of Montana income tax rates up to date and complete, we cannot be held liable for errors or omissions. Is info on this page missing or out-of-date? Please let us know so we can fix it!
The Montana tax brackets on this page have been updated for tax year 2024, and are the latest brackets available. States often adjust their tax brackets on a yearly basis, so make sure to check back later for Montana's updated tax year 2025 tax brackets!
Tax Data Sources:
- The Montana tax brackets on this page were last updated from the Montana Department of Revenue in 2024. Please contact us if any of our Montana tax data is incorrect or out of date.
- Montana tax return forms are available on the Montana tax forms page or the Montana Department of Revenue.
- Before the official 2024 Montana income tax brackets are released, the brackets used on this page are an estimate based on the previous year's brackets. These numbers are subject to change if new Montana tax tables are released.
- The Montana income tax estimator tool is provided by Tax-Rates.org .