Montana Property Tax Assistance Program (PTAP): 2027 Guide

How PTAP Works

Montana assesses market value, then uses property-class rates to find taxable value. Local levies affect the bill. PTAP reduces the normal tax rate on qualifying home value. It does not change the sale price, pay a mortgage, or send cash.

PTAP reduces the normal rate by 80%, 50%, or 30%, based on income and filing status. An 80% rate reduction does not mean the whole county bill falls by 80%. Levies and special assessments still matter. A credit or deferral works differently.

Which part of the home qualifies?

The DOR’s property tax assistance overview describes PTAP relief on the first $418,000 of home market value. The newer 2027-specific PTAP eligibility page states the 2027 income bands but does not restate this value cap. Ask DOR to confirm how the value limit applies to your 2027 assessment before relying on it in a tax estimate. Do not use the older $350,000 figure from past guides.

On farm or forest land, PTAP covers the house and a one-acre home site, not the whole parcel. Check Montana property records or ask DOR about your parcel.

Who May Qualify in Tax Year 2027?

The current PTAP page lists these conditions for the 2027 property tax year:

• You own a home, mobile home, or manufactured home, or are buying one under a contract to purchase.
• You live in the home as your main residence for at least seven months of the year.
• Your 2025 federal adjusted gross income (FAGI), with the state’s adjustments for capital and income losses, meets the 2027 limit.
• If married, your spouse’s 2025 income counts even if your spouse is not a property owner.

PTAP’s published rules do not list a separate age-62 test; the elderly credit does. For trusts, shared ownership, or unusual contracts, ask DOR to review the deed.

The 2027 income ranges

Use 2025 income for Tax Year 2027. Do not use the household-income test for the elderly credit. The 2027 PTAP page shows the following ranges:

Why 2026 numbers look different

For Tax Year 2026, Montana used 2024 FAGI, with limits of $29,037 single and $38,917 married or head of household. The paper form found during research still says 2026. Ask DOR for the correct 2027 form. For help with income-tax records, see our senior tax help guide.

People whose only income is Social Security, veterans’ benefits, or other nontaxable sources have an extra paperwork step: the DOR asks for a Social Security statement or other proof. This is not a reason to skip PTAP screening. If you are new to Montana, the DOR asks for a copy of your 2025 federal return with the application.

How to Apply Without Using the Wrong Form

1. Start at the official form page. The state’s PTAP form listing offers electronic filing and a printable form. Check the tax year shown on the form itself.
2. Fill in ownership and home details. Use the property address and identification details requested by the form. Answer the occupancy question based on how you actually use the home.
3. Report the right income year. For 2027, check the 2025 income rule. Include spouse income as directed, and gather extra statements if your income is only nontaxable.
4. Submit by the deadline. DOR says April 15. A missed deadline means the application is considered for the following tax year, not backdated automatically.
5. Keep proof. Save a copy, a submission receipt or dated postal record, and the year marked on your application. Ask DOR what confirmation notice to expect.

Documents to gather

• Your 2025 federal tax return or information used to determine 2025 FAGI.
• Your spouse’s relevant income information, if married.
• Social Security or veterans’ benefit statements if those or other nontaxable sources are your only income.
• Property address, ownership paperwork, and contract-to-purchase papers if relevant.
• Any earlier PTAP approval letter or status notice, if you applied before.
• A reliable mailing address and phone number for agency follow-up.

You file PTAP with the Montana Department of Revenue, not with a commercial grant website. Find your local DOR field office for questions about paper delivery and accepted documents. DOR’s main customer service number is 406-444-6900; Montana Relay is 711 for callers who need relay service.

Do approved owners reapply?

The state’s guidance says a PTAP application remains active while you own and live in the home. DOR sends a letter each year with the current program status and checks whether you still qualify. You do not need to file a brand-new application each year just because another tax year starts, but you still must meet that year’s rules.

PTAP, the Senior Credit, and the Homestead Rate

PTAP is not the elderly homeowner/renter credit

Montana’s Elderly Homeowner/Renter Credit is a refundable state income-tax credit, not a property tax rate cut. It can help certain owners or renters age 62 or older. The state lists a household income limit below $45,000 and a maximum credit of $1,150. It also has separate nine-month Montana residence and six-month home occupancy rules.

The credit uses household income, not PTAP’s FAGI test. It uses Schedule 2EC; see DOR filing options and our Montana senior tax guide.

For a homeowner who is 62 or older, it makes sense to check both programs separately. The official pages describe separate taxes and eligibility systems; they do not provide a simple public formula proving that every household can combine every benefit. Ask DOR how the credit’s property-tax inputs are handled when PTAP also applies. A renter cannot claim PTAP merely because their landlord receives tax relief.

PTAP is also not homestead enrollment

The Homestead Reduced Rate is a separate classification for qualifying principal residences. The 2027 homestead enrollment window began May 4, 2026, and is scheduled to end March 1, 2027. That is not the PTAP April 15 deadline. Homeowners should check both records but must not assume that submitting one form signs them up for the other.

The homestead questions cover enrollment after a move. Homestead market-value tiers differ from PTAP discounts.

Can both property-rate programs apply? The public pages reviewed do not give a simple applicant-specific stacking rule. Ask DOR which tax rate it will use for the eligible value of your property, and request an explanation in writing. Do not multiply two discount percentages or use an online estimate as a final bill.

If Your Application Is Late, Delayed, or Denied

After April 15, apply promptly and ask DOR which tax year will be reviewed. Late applications are considered for the following year; they do not promise a retroactive refund.

If DOR says you are not eligible, first ask for the exact reason in writing. It could be ownership, occupancy, income records, missing signatures, or a difference between the tax year on your form and the year the office is checking. Ask what documents can fix the problem and what review options, if any, apply to a PTAP denial. Do not assume a property appraisal appeal is the same as a PTAP eligibility review.

If your disagreement is about market value, the DOR appraisal and appeal guide describes a separate review process. The former special June 1, 2026 late window for the 2025–2026 appraisal cycle has already closed. Check the date on any new notice; do not reuse that expired deadline. If the bill is due, contact the county treasurer while the matter is being reviewed.

For wider housing costs that PTAP does not cover, our Montana housing help guide explains other routes. For a tax bill threatening immediate hardship, see Montana emergency assistance as a separate aid search, not as a promise of tax-payment funding.

Reality Checks and Common Mistakes

• Do not use 2026 income with 2027 rules. The current 2027 page uses 2025 FAGI and higher maximums than 2026.
• Do not mix deadlines. PTAP uses April 15; 2027 homestead enrollment has its own March 1 date.
• Do not assume the old paper form is current. Confirm the 2027 form and signature rules with DOR.
• Do not count one person’s income only. A spouse’s income matters under PTAP even if that spouse is not on the deed.
• Do not confuse an appraisal with a PTAP decision. Different reviews and filing dates may apply.
• Do not stop paying the county bill. An application, question, or appeal does not by itself erase a tax payment duty.

See the DOR 2026 property-tax explanation for rate background. Use our Montana assistance guide to prepare questions, not calculate a final bill.

Phone Scripts You Can Use

Call the Montana Department of Revenue at 406-444-6900. Use the field office finder if you need a local contact.