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Last updated: September 13, 2026
Montana seniors face two tax timelines in 2026. Most returns filed this year cover 2025 income. New state income-tax rates that began January 1, 2026 will be used on returns filed in 2027. This guide separates the two.
Bottom Line
For a 2025 Montana return filed in 2026, taxable Social Security generally follows the federal result, most taxable retirement distributions remain taxable, and a taxpayer age 65 or older gets a Montana subtraction of $5,660. Qualifying people age 62 or older may also get an Elderly Homeowner/Renter Credit up to $1,150. An extended 2025 Montana return is due October 15, 2026; tax owed was still due April 15.
Deadline Alert
If you have not filed your 2025 Montana income-tax return, check your status now. Montana gives an automatic six-month filing extension, so an extended return is due October 15, 2026. The extension does not extend the time to pay. See the state’s filing extension rules. If you owe and cannot pay in full, the Department of Revenue has a payment plan page.
Start Here
- Know which year you are filing. A return filed in 2026 usually reports 2025 income. Do not use the new 2026 Montana rates on a 2025 return.
- Check senior-specific breaks. Review the federal senior deduction, Montana’s age-65 subtraction, and the Elderly Homeowner/Renter Credit.
- Check property relief separately. Income-tax filing, PTAP, and the homestead reduced rate have different rules and deadlines. The Montana property-tax guide gives deeper help.
Quick Reference
| Question | Best first step | Key rule |
|---|---|---|
| Is my Social Security taxed? | Check the taxable amount on federal Form 1040. | Montana generally includes the federally taxable portion. |
| I am 65 or older. | Check both federal and Montana senior deductions. | For tax year 2025, Montana’s age-65 subtraction is $5,660 per eligible taxpayer. |
| I own or rent my home. | Screen for the Elderly Homeowner/Renter Credit. | Age 62+, household income under $45,000, and other residency rules apply. |
| My property tax is high. | Check PTAP and homestead enrollment. | The 2026 deadlines have passed; 2027 homestead enrollment is open. |
| I need free filing help. | Use VITA or AARP Tax-Aide. | Montana links to current free-preparation locators. |
What Changed for 2026
- Federal senior deduction: New for 2025 returns, eligible people age 65 or older may claim up to $6,000 per person; income phaseouts apply. See the IRS senior deduction.
- Montana also helps age-65 filers: The 2025 Form 2 calculation recognizes the new federal additional deduction and then allows Montana’s separate age-65 subtraction.
- 2026 Montana rates changed: The 4.7% bracket became much wider and the top ordinary-income rate fell to 5.65%. These rates apply to 2026 income, generally filed in 2027. See 2026 rate changes.
- Property-tax rules changed: A new reduced-rate structure began for qualifying principal residences and long-term rentals. The 2026 enrollment period is over; 2027 enrollment is open.
Which Tax Year Applies?
The 2026 filing season mainly covers tax year 2025. Montana says 2025 Form 2 returns were due April 15, 2026, with an automatic filing extension to October 15. Current Montana filing rules generally follow the federal filing requirement, with added rules for Montana residents, part-year residents, nonresidents with Montana-source income, and people with Montana additions or subtractions.
Income earned during calendar year 2026 uses the new 2026 brackets and will generally be reported in 2027.
| Item | 2025 tax year, filed in 2026 | 2026 tax year, filed in 2027 |
|---|---|---|
| Montana ordinary-income rates | 4.7% up to $21,100 single/MFS, $31,700 head of household, or $42,200 joint/surviving spouse; then 5.9% | 4.7% up to $47,500 single/MFS, $71,250 head of household, or $95,000 joint/surviving spouse; then 5.65% |
| Montana age-65 subtraction | $5,660 per eligible taxpayer; $11,320 if filing jointly and both spouses are 65+ | Inflation-adjusted annually; use the 2026 Form 2 amount when DOR publishes it |
| Federal senior deduction | Up to $6,000 per eligible person, subject to income phaseout | Still available under current federal law for 2025–2028, subject to the same basic eligibility rules |
For the return being filed in 2026, use the official 2025 Montana tax tables. Do not carry a 2025 dollar amount into tax year 2026 unless the Department of Revenue publishes the same amount for 2026.
Does Montana Tax Social Security?
Sometimes. Montana does not give a blanket exemption for Social Security. Since tax year 2024, Montana starts from the federal taxable-income framework. The Department of Revenue says taxable Social Security is included in Montana taxable income to the extent it is included in federal taxable income. The state explains this change in its tax simplification hub.
Federal rules determine how much is taxable. Social Security alone may create no taxable benefits or filing requirement, while other income can make up to 85% taxable. See the IRS Social Security rules.
Helpful tip: The new federal $6,000 senior deduction does not make Social Security itself tax-free. It is a separate deduction that can reduce taxable income.
How Montana Treats Retirement Income
Private and public pensions, traditional IRA withdrawals, and 401(k) distributions are generally included in Montana taxable income when taxable federally. Qualified Roth distributions generally are not.
Montana’s former broad pension and IRA deductions ended with the tax simplification changes for tax year 2024. Montana now uses the age-65 subtraction instead. Railroad retirement has separate rules, so check the current Form 2 instructions.
Military retirement
Some Montana resident military retirees may qualify for the Working Military Retirement Exemption. For an eligible retiree, the subtraction is generally the lesser of 50% of qualifying military retirement income or qualifying Montana-source wages, business income, or farm income. Eligible survivor-benefit recipients have a related rule. Residency timing and a five-consecutive-year limit also apply. Check the official military retirement exemption and the GFS Montana veteran benefits guide before filing.
Senior Deductions to Check
Federal enhanced senior deduction
For tax year 2025, many people age 65 or older can claim an additional federal deduction of up to $6,000 per person, or up to $12,000 on a joint return if both spouses qualify. It is available whether you itemize or take the standard deduction. The deduction begins to phase out when modified adjusted gross income is above $75,000 for an individual or $150,000 for a joint return.
This is separate from the usual extra standard deduction for age 65 or blindness. For 2025, the basic federal standard deduction is $15,750 single/MFS, $31,500 joint/surviving spouse, and $23,625 head of household. See standard deduction guidance.
Montana age-65 subtraction
For tax year 2025, Montana allows a $5,660 subtraction for a taxpayer age 65 or older. A married couple filing jointly can claim $11,320 if both spouses are 65 or older. This is a Montana subtraction from taxable income, not a refundable credit.
DOR says this amount is adjusted annually for inflation. As of September 13, 2026, its public Form 2 pages still list 2025 as the latest return year. Do not assume $5,660 will be the 2026 amount.
Property-Tax Relief for Montana Seniors
Montana has several different property-tax programs. They are not interchangeable. Age, income, disability, veteran status, ownership, occupancy, and filing dates can change the correct route. For deeper help, use the GFS property-tax relief finder.
| Program | Who may qualify | 2026 reality check |
|---|---|---|
| Elderly Homeowner/Renter Credit | Age 62+ by December 31, Montana resident at least 9 months, occupied a Montana home at least 6 months, household income under $45,000 | Refundable income-tax credit up to $1,150; homeowners and renters can qualify |
| PTAP | Qualifying primary-residence owners with limited income | Applies to first $418,000 of market value; 2026 deadline was April 15 |
| Homestead reduced rate | Qualifying principal-residence owners who live there at least 7 months | 2026 enrollment is closed; 2027 enrollment is open through March 1, 2027 |
Elderly Homeowner/Renter Credit
The elderly credit page says the refundable credit can be as high as $1,150, even for some people who do not otherwise file a Montana income-tax return. The amount depends on household income, rent, and property tax.
For a 2025 claim, use Schedule 2EC. If you missed April 15 and do not otherwise have a filing requirement, call DOR at 406-444-6900 because special statutory timing rules can apply.
Property Tax Assistance Program
For tax year 2026, the PTAP rules limit eligibility to a 2024 federal adjusted gross income below $29,037 for a single applicant or $38,917 for married applicants and heads of household. The home must be the primary residence for at least seven months. The reduction applies to the first $418,000 of market value and can reduce the normal tax rate by 30%, 50%, or 80%, depending on income.
The 2026 PTAP deadline was April 15. DOR says a late application will be considered for the following year. If you missed it, apply as soon as possible for the next cycle instead of waiting for another tax bill.
2026 homestead reduced rate
For a qualifying 2026 homestead, the reduced classification rate is tiered: 0.76% on the first $378,000 of market value, 0.90% on $378,001 through $756,000, 1.10% on $756,001 through $1,511,999, and 1.90% above that. See 2026 property-tax rules.
The 2026 enrollment deadline was March 20, 2026. Many 2025 rebate recipients were automatically enrolled if ownership did not change and the home remained their primary residence. The homestead FAQ says 2027 enrollment is open.
Veterans with qualifying disabilities and some surviving spouses may have a separate property-tax assistance route. Seniors with disability-related needs can also review Montana disability help.
Other Montana Taxes Seniors Should Know
No general-use sales tax
Montana has no general-use sales tax, though selected items and activities still have specific taxes. See the state’s sales tax guidance.
No current Montana estate or inheritance tax
Montana no longer collects inheritance tax for deaths after January 1, 2001 and has no state estate tax for deaths after 2004. Federal rules and estate income-tax filing can still matter. See estate tax guidance.
Investment income
For tax year 2026, Montana’s net long-term capital-gain rates remain 3.0% and 4.1%, with brackets adjusted to the wider ordinary-income ranges. A large investment or property sale may need professional review.
Filing, Extensions, and Free Tax Help
Tax year 2025 Form 2 was due April 15, 2026. Montana gives an automatic six-month filing extension with no separate form, making an extended return due October 15, 2026. Payment was still due April 15.
Residents and part-year residents with a federal filing requirement generally must file Montana Form 2. Nonresidents with Montana-source income may also need to file. A return may still be needed to recover withholding or claim a refundable credit.
Free preparation
Montana’s free filing resources link to Volunteer Income Tax Assistance (VITA) and AARP Foundation Tax-Aide. AARP Tax-Aide gives priority to taxpayers age 60 or older.
If you need help finding local services beyond taxes, the GFS guide to Montana aging offices can help you find Area Agencies on Aging and senior centers.
What to Gather Before You File or Call
- Photo identification and Social Security numbers for people on the return.
- Your 2025 federal return or draft federal return.
- Forms SSA-1099, 1099-R, W-2, 1099-INT, 1099-DIV, and other income forms.
- Property-tax bills and proof of tax paid if you own your home.
- Rent records or landlord information if you may claim the elderly renter credit.
- Prior-year Montana return and any Department of Revenue notices.
- Bank information for direct deposit if you expect a refund.
- Military retirement records and Form WMRE information if you may use that exemption.
The GFS benefits document checklist can help you organize records for tax, benefits, and assistance applications.
How to Start Without Wasting Time
- Finish the federal return first. Montana now relies heavily on federal taxable-income figures.
- Use the correct Montana year. A 2025 return uses 2025 tables even if you file it in September or October 2026.
- Check the age boxes and senior deductions. The federal senior deduction and Montana age-65 subtraction are separate.
- Screen for refundable property help. The elderly credit can be worth checking even when no regular income-tax return is required.
- Check property status for next year. If you missed a 2026 property-tax deadline, ask whether you can be enrolled or considered for 2027.
- Save every notice. Deadlines to respond or appeal can be much shorter than ordinary filing deadlines.
Special Situations in Montana
Enrolled tribal members
Montana has special rules for enrolled tribal members. Income sourced to the reservation governed by your tribe may be exempt in qualifying situations. If all income is exempt, Form ETM may serve as the Montana return; if only part is exempt, Form ETM may be filed with Form 2. Check the official Form ETM guidance. Do not assume tribal enrollment by itself makes all income exempt.
Veterans and surviving spouses
Military retirement, survivor benefits, and disabled-veteran property relief have separate rules. Do not apply ordinary pension rules to every military payment.
Part-year and nonresident seniors
If you moved into or out of Montana or have Montana-source income while living elsewhere, review DOR residency guidance or use a qualified tax professional.
Reality Checks
- 2025 and 2026 figures are not interchangeable. Montana’s 2026 rate cut does not change the 2025 return you file in 2026.
- Social Security is not automatically tax-free in Montana. The federally taxable portion generally flows into Montana taxable income.
- The $6,000 federal deduction and $5,660 Montana subtraction are different. One does not replace the other for tax year 2025.
- A property-tax classification rate is not your final bill. Your actual bill also depends on taxable value and local levies.
- Property programs have separate deadlines. A late PTAP application does not automatically create 2026 relief.
- “Free federal filing” may not mean free Montana filing. Use the state’s current free-file or volunteer-preparation links.
Common Mistakes to Avoid
- Using the new 5.65% rate on a 2025 Montana return.
- Assuming all Social Security is exempt from Montana income tax.
- Using an old Montana pension or IRA deduction that no longer applies.
- Missing the elderly homeowner/renter credit because you normally do not file.
- Reusing last year’s age-65 subtraction for tax year 2026 before DOR publishes the new amount.
- Assuming a 2025 property-tax rebate means every later property program is automatic.
- Ignoring a tax notice because you cannot pay the full balance.
If You Owe, Are Delayed, or Get Stuck
If you owe: File the return even if you cannot pay everything. Then use the state payment-plan process. Avoiding the return can add a separate late-filing problem.
If a credit is denied: Read the notice closely, keep the envelope and date, and ask DOR what document or rule caused the denial. Do not miss a protest or appeal deadline while gathering paperwork.
If normal service does not solve the problem: Montana’s Taxpayer Advocate helps with state tax problems that remain unresolved through normal channels. The office can be reached at 406-444-6789.
If the tax bill threatens basic needs: The GFS Montana emergency help guide lists broader food, utility, housing, and crisis routes.
Phone Scripts You Can Use
Montana Department of Revenue — filing question
“I am an older Montana taxpayer filing a 2025 return in 2026. I need to confirm which senior deduction or credit applies and whether my return is on extension. Can you tell me which form or schedule I should review?”
Property-tax assistance question
“I own and live in my Montana home. I want to know whether I am enrolled for the homestead reduced rate and whether I can be considered for PTAP for the next tax year. What information do you need from me?”
Elderly credit question
“I am age 62 or older and my household income is under $45,000. I own or rent my Montana home. Can you tell me whether I should file Schedule 2EC, and what proof of rent or property tax I need?”
Taxpayer Advocate question
“I already contacted the Department of Revenue about this problem, but I still cannot get it resolved. I have the notices and dates with me. Can you tell me whether the Taxpayer Advocate can help and what I should send?”
Local and Official Resources
- Montana Department of Revenue: 406-444-6900 for individual income-tax and property-tax program questions.
- Montana field offices: Use the DOR site to find the office serving your county.
- Benefits navigation: The GFS Montana benefits portals guide explains official state benefit entry points.
- Broader senior help: The GFS Montana senior assistance guide covers food, health costs, housing, utilities, care, and other programs.
- Estimated payments: Seniors with investment, pension, business, or other income not fully covered by withholding can review Montana’s estimated payment rules.
Resumen en Español
La declaración que normalmente se presenta en 2026 corresponde a los ingresos de 2025. Para ese año, Montana usa tasas de 4.7% y 5.9%, y una persona de 65 años o más puede tener una resta estatal de $5,660.
El Seguro Social no está totalmente exento en Montana. La parte imponible a nivel federal generalmente entra en el cálculo estatal. También existe una deducción federal adicional de hasta $6,000 para muchas personas de 65 años o más.
Personas de 62 años o más deben revisar el crédito para propietarios o inquilinos, de hasta $1,150, con ingreso familiar menor de $45,000 y otras reglas. Para ayuda, llame al Departamento de Revenue al 406-444-6900.
Frequently Asked Questions
Does Montana tax Social Security for seniors?
Montana generally includes the portion of Social Security that is taxable on your federal return. It does not provide a blanket state exemption for all Social Security benefits.
What is the Montana age-65 subtraction for a 2025 return?
For tax year 2025, the Montana subtraction is $5,660 for each eligible taxpayer age 65 or older. A joint return can claim $11,320 if both spouses are 65 or older.
Does Montana tax pensions, IRAs, and 401(k) withdrawals?
Generally yes, when the income is taxable federally. Montana removed the former broad pension and IRA deductions when tax simplification took effect for tax year 2024, but the age-65 subtraction and certain special exemptions can still apply.
What changed in Montana income tax for tax year 2026?
For tax year 2026, Montana keeps a 4.7% lower rate but widens that bracket to $47,500 for single and married-filing-separately taxpayers, $71,250 for heads of household, and $95,000 for joint filers and qualifying surviving spouses. The top ordinary-income rate falls to 5.65%.
What is the Montana Elderly Homeowner/Renter Credit?
It is a refundable Montana income-tax credit of up to $1,150 for qualifying homeowners and renters age 62 or older. Key rules include Montana residency, home-occupancy requirements, and household income under $45,000.
Is the 2026 Montana homestead reduced-rate application still open?
No. The 2026 enrollment deadline was March 20, 2026. The 2027 enrollment period is now open and is scheduled to run through March 1, 2027.
Where can Montana seniors get free tax preparation?
Montana’s filing-options page links to Volunteer Income Tax Assistance and AARP Foundation Tax-Aide. AARP Tax-Aide gives priority assistance to taxpayers age 60 and older.
Does Montana have a general sales tax?
No. Montana does not have a general-use sales tax, although selected goods, services, and activities can still be subject to specific taxes or fees.
About This Guide
Sources: This guide uses official federal, state, local, and other high-trust nonprofit and community sources linked in the article.
Editorial note: This guide is produced under the GFS Editorial Standards using official and other high-trust sources. GFS is not affiliated with a government agency and is not a substitute for official agency guidance. Individual eligibility outcomes cannot be guaranteed.
Last verified: September 13, 2026. Next review: December 13, 2026.
Corrections: Despite careful verification, errors may occur. Readers may email info@grantsforseniors.org with corrections.
Disclaimer: This article is for informational purposes only and is not legal, financial, medical, tax, disability-rights, immigration, or government-agency advice. Program rules, policies, funding, and availability can change. Readers should confirm current details directly with the responsible official program before acting.
Last updated: September 13, 2026 · Next review: December 13, 2026
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