Montana Income Tax Calculator
Two clean brackets • 4.7% and 5.9% • No sales tax • Lower capital gains rates
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Montana tax bracket breakdown
| Rate | Income range | Taxed in this band | Tax from band |
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Montana’s lower capital gains tax rate — a real investor advantage
Most states tax investment gains the same as wages. Montana does not. Long-term capital gains get their own lower bracket — just 3.0% up to the threshold and 4.1% above it, compared to 4.7%/5.9% on ordinary income. If you entered capital gains above, here is what that saves you.
Your Montana Capital Gains Tax Estimate
Montana’s no-sales-tax advantage — what it means in real dollars
Montana is one of only five states with zero sales tax. The table below estimates how much you would spend on sales tax living in neighboring states, based on typical spending patterns for your income level.
| State | Income tax (est.) | Est. sales tax paid/yr | Combined burden vs. Montana |
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Raise or bonus — how much does Montana actually take?
Montana vs. neighboring and no-tax states — side by side
| State | State income tax | Take-home pay | vs. Montana |
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How your filing status changes your Montana tax bill
| Filing status | Bracket threshold | MT tax owed | Effective rate |
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Your Montana take-home broken down every way
5-year Montana income and tax projection
Assumes a 3% annual raise. Montana bracket thresholds held constant at current official figures.
| Year | Gross income | Federal tax (est.) | Montana tax | Take-home pay |
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Montana State Income Tax: Everything You Need to Know Before You File
If you have ever looked at the income tax rates in states like California or Oregon and felt a little envious, Montana might be the pleasant surprise you are looking for. Big Sky Country keeps its income tax structure refreshingly lean: just two brackets, with rates of 4.7% and 5.9%. But the headline rate is only part of the story. Because Montana also has no sales tax, taxes long-term capital gains at a distinctly lower rate, and starts your state tax calculation from your already-reduced federal taxable income, the real-world effective rate for most Montana residents lands well below what you might expect.
What I find genuinely interesting about Montana’s system is how it changed starting in 2024. The state went from a seven-bracket structure (with a top rate as high as 6.75%) down to just two brackets — part of the most significant tax simplification Montana has undertaken in decades. That reform, driven by Senate Bill 399 from the 67th Legislature, also changed how Montana determines the starting point for taxable income. Instead of recalculating everything from scratch the way older state systems do, Montana now starts directly from your federal taxable income — meaning all those above-the-line federal deductions you took on your 1040 automatically carry over to your state return as well.
How Montana’s two income tax brackets actually work
Under the current structure, every Montana taxpayer uses the same rates — the only difference is where the bracket boundary falls depending on your filing status. Single filers and those married filing separately hit the 5.9% bracket at $21,100 of Montana taxable income. Married couples filing jointly get a threshold that is exactly double: $42,200. Head of household filers sit in between at $31,700. Because Montana starts from federal taxable income (which has already had the federal standard deduction removed), most middle-income earners find that a sizeable portion of their wages falls in the 5.9% bracket even at modest income levels — but the effective rate stays low because that 4.7% bottom bracket reduces the overall average.
Montana’s capital gains tax — a genuine advantage for investors and retirees
Here is the detail that surprises most people who are researching Montana taxes for the first time: Montana does not treat long-term capital gains the same as ordinary wage income. Instead, gains from assets held longer than a year are taxed on a separate, lower schedule — 3.0% up to the bracket threshold and 4.1% above it. Compare that to the 5.9% ordinary rate that would apply to the same dollars if they were wages, and you are looking at a meaningful reduction, especially for someone with a large stock sale, business exit, or rental property disposal. For retirees living on investment portfolios, this distinction can save thousands of dollars a year compared to states that tax capital gains as ordinary income.
Montana has no sales tax — and that matters more than people realize
Montana is one of only five states in the country with no state or local sales tax of any kind. When you compare tax burdens between states, this is easy to overlook because sales tax doesn’t show up on your annual return — it quietly leaves your wallet every time you buy groceries, clothing, furniture, or a car. A household spending a typical proportion of their income on taxable goods in a neighboring state like Idaho (6%) or Colorado (2.9% state, more with local) can easily pay $1,500 to $3,500 a year in sales tax alone. In Montana, that number is exactly zero. For families making purchasing decisions about where to live, this is one of the most tangible and repeatable tax savings available anywhere in the Mountain West.
What income is exempt from Montana state tax?
Montana follows the federal treatment of most income categories, with a few important exceptions worth knowing about. Social Security benefits are taxable in Montana to the same extent they are taxable at the federal level — which means lower-income recipients may have little or none of their benefits taxed, while higher earners will see up to 85% of benefits included. This is one area where Montana is less generous than states like Oregon or California that fully exempt Social Security.
Military retirees get a better deal: Montana exempts certain categories of military retirement income under the Working Military Retirement and Survivor Benefit Exemption. Residents aged 65 or older can also claim a $5,660 standard subtraction (per person, so $11,000 for a couple where both spouses qualify), which significantly reduces taxable income in retirement years. The Medical Savings Account deduction allows up to $4,600 for contributions to a qualifying MSA — a benefit that most states simply don’t offer.
Montana income tax rates and thresholds for 2025 — from the official tax table
| Filing status | 4.7% rate applies to | 5.9% rate applies to |
|---|---|---|
| Single / Married Filing Separately | First $21,100 | Over $21,100 |
| Married Filing Jointly / Qualifying Surviving Spouse | First $42,200 | Over $42,200 |
| Head of Household | First $31,700 | Over $31,700 |
Source: Montana Department of Revenue — 2025 Tax Tables and Deductions (official)
Montana long-term capital gains tax rates for 2025
| Filing status | 3.0% LTCG rate applies to | 4.1% LTCG rate applies to |
|---|---|---|
| Single / Married Filing Separately | First $21,100 of net LTCG | LTCG exceeding $21,100 |
| Married Filing Jointly / QSS | First $42,200 of net LTCG | LTCG exceeding $42,200 |
| Head of Household | First $31,700 of net LTCG | LTCG exceeding $31,700 |
Note: Capital gains rates apply to the portion of net long-term capital gain not already covered by Montana ordinary income in the same bracket tier. Source: Montana DOR 2025 Tax Tables
Is Montana a good state to retire in from a tax standpoint?
Honestly, it depends on your income mix. If your retirement income is heavy on Social Security, Montana’s approach of taxing it at the federal taxable percentage is less favorable than states that exempt it entirely. But if you have a substantial investment portfolio and your retirement income comes largely from capital gains and dividends, Montana becomes genuinely competitive — its 3% to 4.1% capital gains rate is among the lowest in any state that has an income tax at all. Add in the $5,660 per-person age-65-plus exemption, no sales tax, and comparatively low property taxes, and Montana is a serious contender for retirees who want a mountain lifestyle without paying California or Oregon-level income taxes.
Frequently asked questions about Montana income tax
What is the Montana state income tax rate for 2025?
Montana has two tax brackets for 2025: 4.7% on the first portion of taxable income and 5.9% on income above the threshold. The bracket boundary is $21,100 for single filers, $42,200 for married filing jointly, and $31,700 for head of household. These rates apply to ordinary income such as wages, salary, and business income.
Does Montana tax capital gains?
Yes, but at a lower rate than ordinary income. Montana taxes net long-term capital gains at 3.0% up to the bracket threshold and 4.1% above it — considerably lower than the 4.7%/5.9% ordinary income rates. Short-term capital gains (assets held one year or less) are taxed as ordinary income at the standard brackets.
Does Montana have a sales tax?
No. Montana is one of only five states with no state or local sales tax. This makes a meaningful difference in overall tax burden for residents, particularly those with high household spending. Certain resort areas in Montana can charge a local resort tax, but there is no statewide sales tax.
Is Montana a high-tax state?
By income tax rate alone, Montana sits in the middle range nationally — the 5.9% top rate is lower than neighboring California (13.3%), Oregon (9.9%), or even Idaho (5.8%), though similar to Wyoming’s 0% (Wyoming has no income tax). When you factor in no sales tax, the lower capital gains rate, and senior exemptions, Montana’s total tax burden for most residents is quite competitive, especially in the Mountain West.
Does Montana tax Social Security income?
Montana taxes Social Security benefits to the same extent they are taxable at the federal level. For lower-income recipients, this may mean little or no state tax on those benefits. For higher earners, up to 85% of Social Security may be included in Montana taxable income, just as it is federally.
How does Montana calculate taxable income starting from federal income?
Since the 2024 tax year (per Senate Bill 399), Montana starts your state taxable income from your federal taxable income — the figure on line 15 of your federal Form 1040. Montana then applies state-specific additions (for items taxed differently in Montana) and subtractions (like the $5,660 age-65 exemption or MSA deduction) to arrive at Montana taxable income. The practical benefit is that all your federal above-the-line deductions — 401(k) contributions, HSA deductions, student loan interest — automatically carry forward into your Montana calculation.
All tax rates and bracket thresholds on this page are verified against the Montana Department of Revenue 2025 Tax Tables and Deductions (revenue.mt.gov) and the Montana Individual Income Tax guidance page. Federal estimates reference IRS 2025 inflation adjustment guidance (irs.gov). This calculator provides general estimates for planning purposes only. It does not constitute tax, legal, or financial advice. Consult a qualified CPA or the Montana Department of Revenue for your specific situation.