Does Montana Have State Income Tax? Rates & Brackets (2026)

Does Montana have state income tax? Yes. Montana imposes an individual income tax on residents and certain nonresidents who earn Montana-source income. For tax year 2026, ordinary taxable income is subject to two progressive rates: 4.7% and 5.65%.

The 5.65% rate does not apply to every dollar a taxpayer earns. It applies only to ordinary taxable income above the threshold for the taxpayer’s filing status. Montana calculates net long-term capital gains separately using preferential rates of 3% and 4.1%.

For readers asking, “Does Montana Have State Income Tax?” major changes took effect on January 1, 2026. Montana expanded the amount of ordinary income taxed at 4.7%, reduced the top ordinary-income rate from 5.9% to 5.65%, and increased the state Earned Income Tax Credit to 20% of the federal credit. These changes were enacted through House Bill 337.

This guide explains the 2026 Montana income tax rates and brackets, capital-gain rules, taxable-income calculation, deductions, credits, residency requirements, filing deadlines and practical methods for estimating your tax.

Tax-year clarification: The rates discussed below apply to income earned from January 1 through December 31, 2026. Most taxpayers will report that income on returns filed in 2027.

Does Montana have state income tax?

Yes. Montana has a progressive individual income tax system.

For 2026:

• Ordinary taxable income is taxed at 4.7% or 5.65%.
• Net long-term capital gains are generally taxed at 3% or 4.1%.
• The higher rate applies only to income above the relevant filing-status threshold.
• Montana generally begins its calculation with federal taxable income before making state additions and subtractions.
• Residents generally report income from all sources, while nonresidents generally report Montana-source income.

Montana does not impose a general statewide sales tax, but that does not make Montana an income-tax-free state.

Key Takeaways

• For readers asking, “Does Montana Have State Income Tax?” Montana imposes a state individual income tax even though it does not have a general-use sales tax.
• The 2026 ordinary-income tax rates are 4.7% and 5.65%.
• Montana uses progressive brackets, so crossing a threshold does not cause all your income to be taxed at 5.65%.
• The 4.7% bracket extends to $47,500 for single filers, $71,250 for heads of household and $95,000 for joint filers.
• Net long-term capital gains are generally taxed at 3% or 4.1%.
• Montana begins its taxable-income calculation with federal taxable income, subject to state additions and subtractions.
• The state uses your federal filing status and generally carries your federal standard or itemized deduction into the Montana calculation.
• The Montana Earned Income Tax Credit equals 20% of the federal EITC beginning in 2026.
• Estimated tax payments may be required when you expect to owe more than $500 after withholding and nonrefundable credits.
• The normal individual return deadline is April 15, with an automatic six-month filing extension available.
• Montana taxpayers generally must use the same filing status used on their federal return.
• Does Montana Have State Income Tax on remote-work earnings? Remote work physically performed in Montana can create Montana-source income even when the employer is located elsewhere.

Does Montana Have State Income Tax? 2026 Rates and Brackets

Montana’s individual income tax system is progressive. However, it is simpler than the federal income tax system because Montana has only two ordinary-income brackets.

2026 Montana Ordinary-Income Tax Brackets

Montana’s Department of Revenue specifies that these ordinary-income brackets exclude net long-term capital gains, which are subject to their own tax calculation.

How Montana’s Progressive Tax Brackets Work

The 5.65% rate applies only to the portion of ordinary taxable income above the threshold for your filing status.

For example, suppose a single taxpayer has $60,000 of Montana taxable ordinary income:

• First $47,500 taxed at 4.7%: $2,232.50
• Remaining $12,500 taxed at 5.65%: $706.25
• Total Montana income tax before credits: $2,938.75

The taxpayer does not pay 5.65% on the entire $60,000.

Marginal Rate vs Effective Rate

Your marginal tax rate is the rate applied to your next dollar of taxable income.

Your effective tax rate is your total state tax divided by your total taxable income.

In the example above:

• Marginal rate: 5.65%
• Effective rate: approximately 4.90%

Understanding this difference prevents the common misconception that moving into the second bracket causes all income to be taxed at the higher rate.

Simple Montana Income Tax Formulas for 2026

For readers asking “Does Montana Have State Income Tax,” the following formulas provide a simplified estimate of Montana tax on ordinary taxable income before credits, recapture taxes and net long-term capital gains.

For example, a single filer with $60,000 in ordinary Montana taxable income would calculate:

$2,232.50 + ($12,500 × 5.65%) = $2,938.75

These formulas should not be used for net long-term capital gains because Montana calculates those gains separately.

What Changed in Montana Income Tax for 2026?

For taxpayers researching “Does Montana Have State Income Tax,” Montana made several important individual income tax changes beginning January 1, 2026. The state expanded the amount of ordinary taxable income covered by the lower 4.7% rate and reduced the highest ordinary-income tax rate from 5.9% to 5.65%.

The major 2026 changes include:

• The 4.7% bracket increased to $47,500 for single filers and married couples filing separately.
• The 4.7% bracket increased to $71,250 for heads of household.
• The 4.7% bracket increased to $95,000 for married couples filing jointly and qualifying surviving spouses.
• The highest ordinary-income tax rate decreased from 5.9% to 5.65%.
• The Montana Earned Income Tax Credit increased to 20% of the federal EITC.

These changes generally allow taxpayers to keep more ordinary taxable income within Montana’s lower tax bracket.

2025 vs 2026 Montana Tax Brackets

The following comparison helps answer “Does Montana Have State Income Tax” by showing how Montana expanded its lower 4.7% income tax bracket between 2025 and 2026.

The highest ordinary-income tax rate also decreased from 5.9% in 2025 to 5.65% in 2026. As a result, many taxpayers may have more income taxed at 4.7% and less income subject to the highest rate.

What Will Change for Montana Income Tax in 2027?

Montana has enacted another individual income tax reduction for tax year 2027. The lower 4.7% bracket will expand again, while the highest ordinary-income tax rate will decrease from 5.65% to 5.4%.

Montana’s long-term capital-gain rates will remain 3% and 4.1% in 2027, but the thresholds separating the two rates will increase to match the wider ordinary-income brackets.

The 2027 changes do not apply to income earned during 2026. They apply to income earned from January 1 through December 31, 2027.

Does Montana Have State Income Tax on Long-Term Capital Gains?

For readers asking, “Does Montana Have State Income Tax?” yes, Montana taxes net long-term capital gains, but it applies lower rates than the rates used for ordinary income.

The 2026 Montana long-term capital-gain rates are:

• 3%
• 4.1%

The applicable rate depends on your ordinary taxable income and how much room remains within your filing-status threshold. Long-term capital gains effectively stack on top of ordinary income.

2026 Capital-Gain Thresholds

The part of your net long-term capital gain that fits between your ordinary income and the applicable threshold is generally taxed at 3%. Gains exceeding the remaining threshold are taxed at 4.1%.

If your ordinary income already exceeds the threshold, the net long-term capital gain is generally taxed at 4.1%.

Montana Capital-Gain Tax Example

This example provides additional context for readers researching “Does Montana Have State Income Tax.”

Suppose a single taxpayer has:

• $30,000 in Montana ordinary taxable income
• $25,000 in net long-term capital gains

The single-filer threshold is $47,500.

There is $17,500 of space remaining between $30,000 and $47,500.

• First $17,500 of long-term gain × 3% = $525
• Remaining $7,500 × 4.1% = $307.50
• Capital-gain tax = $832.50
• Ordinary-income tax: $30,000 × 4.7% = $1,410
• Total before credits = $2,242.50

This calculation is different from simply multiplying all taxable income by one rate.

How Does Montana Tax Short-Term Capital Gains?

For readers asking, “Does Montana Have State Income Tax?” Montana’s preferential 3% and 4.1% rates apply to qualifying net long-term capital gains, not short-term gains.

Short-term capital gains generally remain part of ordinary taxable income and are therefore subject to Montana’s 4.7% and 5.65% ordinary-income brackets for 2026.

The holding period and federal classification of the transaction are important. Assets held for one year or less are generally treated as short-term for federal purposes, while assets held for more than one year may qualify as long-term.

Capital losses may reduce gains or create a carryover under applicable federal and Montana rules. Taxpayers with capital-loss carryovers should file a Montana return so the state can track the loss and determine its future Montana treatment.

How Is Montana Taxable Income Calculated?

Understanding how taxable income is calculated provides a clearer answer to “Does Montana Have State Income Tax?”

Beginning with the 2024 tax year, Montana generally starts with federal taxable income, rather than federal adjusted gross income.

A simplified calculation is:

Federal taxable income
+ Montana additions
− Montana subtractions
= Montana taxable income

Montana then separates taxable income into ordinary income and net long-term capital gains before applying the appropriate rates. The federal qualified business income deduction is not included when determining the federal taxable-income starting point for Montana purposes.

Does Montana Have a State Standard Deduction?

Montana no longer has a separate state-specific standard deduction.

Instead, Montana generally uses the deduction reflected in your federal taxable income:

• Taxpayers claiming the federal standard deduction generally receive its benefit in the Montana calculation.
• Taxpayers itemizing federally generally begin with federal itemized deductions, subject to Montana adjustments.
• The federal qualified business income deduction is excluded from the Montana calculation.
• State income taxes deducted federally may need to be added back under Montana’s rules.

2026 Federal Standard Deduction Amounts Used in the Calculation

Because Montana starts with federal taxable income, these federal deductions can affect the amount ultimately subject to Montana income tax.

Montana Additions to Federal Taxable Income

Some amounts excluded or deducted federally must be added when calculating Montana taxable income. This is an important part of understanding “Does Montana Have State Income Tax?”

Examples can include:

• Interest or mutual-fund dividends from municipal bonds issued by other states
• Certain state income taxes deducted on the federal return
• Nonqualified distributions from specified Montana savings accounts
• Certain pass-through entity or composite taxes deducted from business income
• Expenses used to claim certain Montana tax credits
• Certain recoveries, distributions, amortization and depreciation adjustments

The exact addition depends on how the item was treated on the federal return.

Montana Income Subtractions and Deductions

Montana permits several subtractions from federal taxable income when eligibility requirements are met.

Common examples include:

Eligibility rules, documentation requirements and annual inflation adjustments may affect the amount available.

Does Montana Have State Income Tax on Social Security?

Montana includes taxable Social Security benefits in Montana taxable income to the extent they are included in federal taxable income.

This means Montana does not automatically tax the entire Social Security payment. The amount flowing into the Montana calculation generally depends first on how much of the benefit is taxable federally.

Taxpayers age 65 or older may also qualify for Montana’s $5,660 age-based subtraction, which can reduce Montana taxable income.

How Montana Taxes Pension and Retirement Income

For readers asking, “Does Montana Have State Income Tax?” most federally taxable pension, annuity and traditional retirement-account distributions can be included in Montana taxable income.

However, several special rules may help eligible taxpayers:

• A taxpayer age 65 or older may claim the age-based subtraction.
• Tier I and Tier II Railroad Retirement benefits are exempt through a Montana subtraction.
• Certain working military retirees may subtract part of their military retirement income.
• Certain military survivor benefits may also qualify.
• Qualifying active-duty military compensation may be exempt.

The working military retirement subtraction is generally limited to the lesser of 50% of qualifying military retirement income or qualifying Montana employment, business or farm income. Eligibility is also subject to residency and five-year limitations.

These retirement rules provide important context when answering “Does Montana Have State Income Tax?” for retirees and military families.

What Types of Income Does Montana Tax?

Understanding which earnings are taxable provides a more complete answer to “Does Montana Have State Income Tax?”

Depending on federal treatment and Montana adjustments, taxable income may include:

• Wages and salaries
• Bonuses, commissions and tips
• Self-employment and business income
• Interest and dividends
• Rental income
• Royalties
• Unemployment compensation
• Pension and annuity distributions
• Taxable Social Security benefits
• Partnership and S corporation income
• Short-term capital gains
• Net long-term capital gains
• Montana lottery winnings
• Income from Montana property or business activities received by nonresidents

Montana’s 2026 withholding guide states that wages generally follow federal definitions and include regular pay, bonuses, commissions, tips and other compensation unless a specific exemption applies. Unemployment compensation is also taxable under current Montana rules.

Who Must File a Montana Income Tax Return?

Filing requirements are another important consideration for readers researching “Does Montana Have State Income Tax?”

You generally must file a Montana return when:

1. You were a Montana resident or part-year resident, or you were a nonresident receiving Montana-source income; and
2. You were required to file a federal income tax return.

You may also have to file when you do not have a federal filing requirement but have a Montana addition or subtraction.

A taxpayer should file to claim a refund whenever Montana tax was withheld or estimated payments were made, even when filing would not otherwise be required. Taxpayers must also file to claim credits such as the Montana Earned Income Tax Credit or Elderly Homeowner/Renter Credit.

Do You Need to File a Montana Return if You Had a Loss?

For readers asking, “Does Montana Have State Income Tax?” you may still need to file a Montana return even when your business, investment or rental activity produced a loss.

Montana requires taxpayers with reportable losses—including capital losses, passive-activity losses and net operating losses—to file so the state can track where those losses originated. Failing to report a loss may prevent or complicate its use in a future Montana tax year.

This rule can affect:

• Investors with capital-loss carryovers
• Landlords reporting rental losses
• Sole proprietors with business losses
• Partners and S corporation shareholders
• Taxpayers carrying forward net operating losses

Do not assume that having no taxable profit automatically eliminates the Montana filing requirement.

Must Your Montana Filing Status Match Your Federal Filing Status?

Yes. For tax years beginning after December 31, 2023, Montana taxpayers generally must use the same filing status used on their federal income tax return.

For example:

• A couple filing a joint federal return must normally file a joint Montana return.
• A married couple generally cannot file jointly for federal purposes and separately for Montana purposes.
• A nonresident couple filing jointly at the federal level must file jointly in Montana when one spouse has Montana-source income.
• Couples with different Montana residency statuses may need to complete Schedule II to calculate the portion of joint income taxable by Montana.

Your filing status affects your 2026 Montana tax bracket, federal deduction flowing into the Montana calculation and filing requirements.

Filing Rules by Residency Status

How Montana Residency Affects Your Income Tax

For readers asking, “Does Montana Have State Income Tax?” Montana generally considers you a resident when you are domiciled in the state or maintain a permanent place of abode there. Residency is not decided by one factor alone.

The Department of Revenue may consider evidence such as:

• Where you maintain your permanent home
• Where you are registered to vote
• Your driver’s licence and vehicle registration
• Resident hunting or fishing licences
• Where your spouse and dependants live
• Where you maintain financial, professional and community connections

A Montana resident is generally taxed on income from all sources, including income earned outside Montana. Living temporarily in another state does not automatically terminate Montana residency.

A part-year resident generally reports all income received while residing in Montana, plus Montana-source income received while living elsewhere. A nonresident generally reports only Montana-source income. These residency rules are an important part of understanding “Does Montana Have State Income Tax?”

Does Montana Have State Income Tax for Remote Workers?

Remote-work rules also matter when answering, “Does Montana Have State Income Tax?” Remote employment is generally sourced according to where the work is physically performed.

A nonresident who temporarily works remotely while physically present in Montana may generate Montana-source wages even when the employer is located in another state. Similarly, a full-year Montana resident generally reports remote-work income from an out-of-state employer because Montana taxes a resident’s income from all sources.

Remote workers should also be careful with the credit for taxes paid to another state. Montana states that when another state taxes remote wages under a “convenience of the employer” rule, Montana may deny the credit if the work was physically performed in Montana because the income was derived in Montana rather than the other state.

Montana’s 30-Day Nonresident Worker Exclusion

For nonresidents researching “Does Montana Have State Income Tax?” certain individuals who work in Montana for 30 days or fewer during the year may qualify for an exclusion when they:

• Earn only wages for services performed in Montana, and
• Work in more than one state during the tax year.

The exclusion does not apply to several categories, including professional athletes, entertainers, construction workers, certain production employees, workers compensated per event, employees earning more than $500,000 annually and self-employed taxpayers.

It also does not apply when the nonresident has other Montana-source income, such as rental income from Montana property.

Tax Rules for North Dakota Residents Working in Montana

Montana provides a wage-tax exemption for qualifying North Dakota residents working in Montana. The employee generally must claim the exemption on Form MW-4. Income may instead remain taxable in North Dakota.

Montana Income Tax Credits for 2026

For readers asking, “Does Montana Have State Income Tax?” tax credits are important because they reduce tax liability directly, while deductions and subtractions reduce taxable income.

Montana Earned Income Tax Credit

Beginning with tax year 2026, the Montana Earned Income Tax Credit equals 20% of the federal EITC.

The Montana EITC is refundable, meaning an eligible taxpayer may receive the excess as a refund when the credit exceeds the remaining Montana tax liability. Taxpayers generally must qualify for and claim the federal EITC and satisfy Montana residency requirements.

2026 verification note: Montana’s general EITC webpage may still display the previous 10% amount. However, House Bill 337 guidance and Montana Publication 1 state that the Montana EITC increases to 20% of the federal EITC beginning with tax year 2026. This article follows the tax-year-specific 2026 guidance.

Elderly Homeowner/Renter Credit

Montana homeowners and renters may qualify when they:

• Are age 62 or older by December 31
• Lived in Montana for at least nine months
• Owned, rented or leased a Montana home for at least six months
• Have total household income below $45,000

The refundable credit may be worth up to $1,150. Eligible individuals may claim it even if they otherwise have no Montana income tax filing requirement.

Montana Adoption Tax Credit

A Montana resident who finalizes the adoption of an eligible child may qualify for a refundable state adoption credit.

The credit is:

• $5,000 for an eligible adopted child
• $7,500 when the child was in foster care at the time of adoption
• Fully refundable

An eligible child is generally a person under age 18 or someone who is physically or mentally incapable of self-care. The credit must be claimed for the tax year in which the adoption becomes final, and only one Montana credit is available for each eligible child.

Taxpayers claim the credit by including Form ADPT with their Montana return.

Credit for Taxes Paid to Another State

The credit for taxes paid to another state is another relevant consideration when answering “Does Montana Have State Income Tax?”

A full-year or part-year Montana resident may qualify for a nonrefundable credit when the same income is taxed by Montana and another state or country.

The credit is generally limited to the Montana tax attributable to the income. Special restrictions apply, including rules for remote workers and taxes not measured by net income.

Does Montana Have Sales Tax or Only Income Tax?

Montana does not impose a general-use statewide sales tax.

However, the absence of a general sales tax does not mean Montana residents pay no state taxes. Montana imposes individual income tax, property taxes and various selective taxes and fees. Special taxes can apply to products or services such as lodging, alcohol, tobacco, cannabis and vehicle rentals.

This distinction often causes confusion among people asking, “Does Montana have state income tax?” Montana is a no-general-sales-tax state, but it is not a no-income-tax state.

Montana Income Tax Withholding

Employers generally withhold Montana income tax from taxable wages earned in the state.

Employees use Form MW-4, Montana Employee’s Withholding and Exemption Certificate, to report filing status, claim an applicable exemption or request additional withholding.

Montana updated its wage-withholding tables for 2026 to reflect:

• The lower 5.65% top rate
• Expanded 4.7% brackets
• Updated federal standard deductions
• The state’s federal-style taxable-income calculation

Employees with multiple jobs, two-income households, investment income or self-employment income may need additional withholding.

Who Must Make Montana Estimated Tax Payments?

For taxpayers researching “Does Montana Have State Income Tax?” estimated payments may become necessary when withholding does not cover the expected annual liability.

Estimated payments are generally required when you expect to owe more than $500 in annual Montana income tax after subtracting withholding and nonrefundable credits.

This commonly affects taxpayers receiving:

• Self-employment or business income
• Rental income
• Interest and dividends
• Capital gains
• Royalties
• Pension income without sufficient withholding
• Pass-through business income

Montana generally allows taxpayers to avoid estimated-tax underpayment interest by paying the lesser of:

• 100% of the previous year’s Montana tax liability, or
• 90% of the current year’s Montana tax liability

Specific exceptions may apply to taxpayers with no prior-year filing requirement, no prior-year liability, recently retired taxpayers, disabled taxpayers and taxpayers receiving at least two-thirds of their gross income from farming or ranching.

Montana Estimated Tax Due Dates

For calendar-year taxpayers, installments are generally due:

When a deadline falls on a weekend or legal holiday, the payment is generally due on the next business day.

Montana Tax Return Deadline for Tax Year 2026

The standard Montana individual income tax deadline is April 15.

Therefore, a calendar-year 2026 Montana return will generally be due April 15, 2027, unless the state announces a special postponement or an individual qualifies for another extension.

Montana provides an automatic six-month filing extension. No separate extension application is required. The extended filing deadline is generally October 15.

However, an extension gives you more time to file—not more time to pay. Tax due should still be paid by the original deadline to minimize penalties and interest.

How to File and Pay Montana State Income Tax

Taxpayers with a Montana filing requirement use Form 2, Montana Individual Income Tax Return.

A return may generally be filed through:

• An approved electronic tax-preparation provider
• A qualifying Free File Alliance provider
• A tax professional
• A completed paper Form 2 mailed to the Department of Revenue

Electronic filing is generally the fastest option. Montana’s TransAction Portal, commonly called TAP, can be used to manage a tax account, make payments and access selected tax services. Estimated and extension payments may also be made through TAP or with Montana Form IT, the individual income tax payment voucher.

How to Check a Montana Tax Refund

Taxpayers can use Where’s My Refund? in TAP after the return has been processed. The system requires the taxpayer’s Social Security number, filing status and expected refund amount and generally updates on weeknights.

Montana says refund-status information may become available approximately:

A refund can take up to 90 days to issue. First-time Montana filers receive their refunds by paper check rather than direct deposit as a fraud-prevention measure. Errors, missing forms, identity verification and government debt offsets can delay a refund.

Montana Late-Filing and Late-Payment Penalties

Montana may impose penalties and interest when an income tax return or required payment is late.

The general late-filing penalty is:

• A minimum penalty of $50, or
• 5% of the unpaid tax for each month the return is late
• Up to a maximum of 25% of the tax due

The general late-payment penalty is 0.5% of the unpaid tax for each month the balance remains outstanding, up to a maximum of 12%. Different penalty rules may apply to estimated tax payments, employer withholding and other tax obligations.

For calendar year 2026, Montana’s annual interest rate on individual income tax balances and underpaid estimated taxes is 7%, computed daily at 0.019178%.

Filing the return on time can help limit late-filing penalties even when you cannot pay the entire balance. Taxpayers who cannot pay in full should submit as much as possible by the original payment deadline and review available payment options through the Montana Department of Revenue.

How to Reduce Your Montana Income Tax Legally

For readers researching “Does Montana Have State Income Tax,” effective tax planning should focus on Montana taxable income rather than gross salary alone.

Review Your Withholding

Understanding your withholding is important when answering “Does Montana Have State Income Tax,” because insufficient withholding may leave you with a balance due when you file.

Submit an updated Form MW-4 when you:

• Start a new job
• Get married or divorced
• Take a second job
• Have a spouse who works
• Begin receiving investment or rental income
• Experience a major change in deductions or credits

Use Eligible Montana Subtractions

Review whether you qualify for subtractions involving:

• Age 65 or older
• Montana 529 contributions
• ABLE account contributions
• Federal government bond interest
• Railroad Retirement benefits
• Active-duty military pay
• Military retirement income
• Medical Savings Accounts
• Exempt tribal income
• Qualified volunteer emergency services

Harvest Capital Gains Carefully

Capital-gain planning is another important consideration for taxpayers asking “Does Montana Have State Income Tax.”

Because Montana taxes net long-term capital gains at 3% and 4.1%, the timing of asset sales can affect how much of a gain fits within the lower capital-gain band.

Taxpayers should also consider federal capital-gain rates, investment holding periods, loss carryovers and potential tax on depreciation recapture before selling.

Check Refundable Credits

Eligible taxpayers should not overlook:

• Montana Earned Income Tax Credit
• Elderly Homeowner/Renter Credit
• Adoption Tax Credit
• Other refundable credits available for the applicable year

A refundable credit can produce a refund even when it exceeds the tax owed.

Make Estimated Payments When Necessary

Estimated payments can be especially relevant for self-employed taxpayers researching “Does Montana Have State Income Tax.”

Self-employed individuals, landlords, investors and business owners should estimate their liability before quarterly deadlines. Waiting until the annual return is filed may result in underpayment interest.

Common Montana Income Tax Mistakes

For readers asking, “Does Montana Have State Income Tax?” understanding these common mistakes can help prevent inaccurate calculations, missed credits and filing problems.

1. Applying 5.65% to All Income

The second rate applies only to ordinary taxable income above your filing-status threshold.

2. Using Gross Income Instead of Taxable Income

The brackets apply after the federal deduction and applicable Montana additions and subtractions.

3. Treating Long-Term Gains as Ordinary Income

Montana calculates net long-term capital gains separately using 3% and 4.1% rates.

4. Assuming Montana Has No Taxes Because It Has No Sales Tax

This is a common misunderstanding among people researching “Does Montana Have State Income Tax.” Montana has no general-use sales tax, but it does impose state individual income tax.

5. Forgetting the State Income Tax Addback

Certain state income taxes deducted federally must be added back when calculating Montana taxable income.

6. Assuming an Extension Delays Payment

The automatic six-month extension applies to filing. The original payment deadline still applies.

7. Ignoring a Filing Requirement After Moving

Part-year residents may need to report income received during the Montana residency period and Montana-source income earned outside that period.

8. Missing a Refundable Credit

Some taxpayers who owe little or no Montana income tax may still benefit from filing to claim a refundable credit or recover withholding.

Editorial Methodology and Fact-Check Note

This guide was reviewed and updated on July 21, 2026, using primary government sources.

The research process included:

• Verifying Montana’s 2026 and 2027 ordinary-income tax rates and brackets using Montana Department of Revenue guidance for House Bill 337
• Reviewing Montana Publication 1 for long-term capital-gain rates, additions, subtractions and individual filing rules
• Confirming residency, nonresident, remote-work and Montana-source-income requirements
• Reviewing official instructions for estimated payments, withholding, penalties, refunds and filing options
• Confirming the 2026 federal standard deduction amounts through the Internal Revenue Service
• Comparing general tax webpages with tax-year-specific legislation and official publications when figures appeared inconsistent
• Rechecking the mathematical examples and simplified tax formulas used in this guide

The examples in this article are intended for general education. They do not account for every credit, adjustment, recapture tax, residency issue, business structure or individual circumstance.

Tax laws, administrative guidance and filing procedures may change. Readers should confirm current information with the Montana Department of Revenue or a qualified tax professional before making financial or filing decisions.

Conclusion

Does Montana Have State Income Tax? Yes. Montana taxes ordinary individual income at progressive rates of 4.7% and 5.65% for tax year 2026, while qualifying net long-term capital gains are generally taxed separately at 3% or 4.1%. The expanded lower-rate bracket and reduced top rate may lower the state tax burden for many residents compared with 2025.

Your Montana income tax liability depends on your federal taxable income, filing status, state additions and subtractions, capital gains, available credits, residency and withholding. Review Form MW-4, make estimated payments when required and confirm current Montana Department of Revenue guidance before filing your 2026 return in 2027.

Does Montana Have State Income Tax FAQs

1. Does Montana Have State Income Tax on qualified Roth IRA withdrawals?

Generally, no. Qualified Roth IRA withdrawals are federally tax-free and normally do not enter Montana taxable income. Taxable earnings from a nonqualified withdrawal may be included.

2. Does Montana Have State Income Tax on cryptocurrency gains?

Generally, yes. Taxable cryptocurrency income and gains reported federally normally flow into Montana taxable income. Qualifying long-term gains may receive Montana’s separate capital-gain treatment.

3. Does Montana Have State Income Tax on unqualified 529 withdrawals?

An unqualified 529 withdrawal may trigger a Montana recapture tax when the contributions previously reduced Montana taxable income. Qualified education withdrawals generally avoid this recapture.

4. Does Montana Have State Income Tax on nonqualified ABLE withdrawals?

Yes, in some cases. Earnings used for nonqualified expenses may become taxable, and previously deducted contributions may be subject to Montana recapture rules.

5. Does Montana Have State Income Tax and allow a federal tax deduction?

Montana has an individual income tax, but it no longer provides its former state deduction for federal income tax paid. Montana now generally begins its calculation with federal taxable income.

Disclaimer

This article provides general educational information and is not individualized tax, accounting or legal advice. Tax treatment depends on your income, residency, filing status, deductions, credits and other facts. Consult a qualified tax professional or the Montana Department of Revenue for guidance about your specific situation.