Property taxes in Montana are assessed and collected at the local level — primarily by counties and municipalities — with rates varying significantly depending on where your home is located. The statewide average effective rate for 2025is 0.84%, meaning a homeowner with a $383,900 median-value home typically pays around $3,225 per year in property taxes. For a monthly perspective, that works out to roughly $269/month — a line item that should factor into every home purchase decision in Montana.
Montana uses a 100% assessment ratio for primary residential properties. Most states with a 100% ratio assess property at full market value — what the county believes your home would sell for — and apply a millage rate directly to that figure.
Available Exemptions in Montana
Montana does not have a homestead exemption. The state does offer a Property Tax Assistance Program (PTAP) for income-qualified residents.
Property Tax Assistance Program (PTAP): seniors 62+ with income under $45,000 (single) or $54,000 (married) receive a 30%–80% reduction in taxable value.
Disabled veterans with 100% service-connected disability: property tax exemption up to $150,000 of market value. Lesser disability ratings receive proportional reductions.
What Makes Montana's Property Tax System Unique
Montana home values have risen sharply since 2020 (Bozeman, Missoula) driving property tax bills up significantly. The state uses a 1.35% tax rate on 100% of market value (residential class rate). Counties add local levies on top. The PTAP program provides significant relief for income-qualified residents.
When Are Montana Property Taxes Due?
Montana property taxes are paid on a semi-annual (twice per year) basis. Due dates: November 30 and May 31. Missing a due date typically results in penalty interest (often 1–2% per month) and eventually tax liens, so it is important to calendar these dates well in advance — especially if you have a mortgage and your lender handles property tax through escrow (in which case they pay on your behalf from your escrow account).
How to Appeal Your Property Tax Assessment in Montana
If you believe your property has been over-assessed — which is surprisingly common, especially after rapid market changes — you have the right to appeal. File with the Montana Department of Revenue within 30 days of receiving your assessment notice. Further appeals go to the State Tax Appeal Board.
To build a strong appeal, gather comparable sales (homes similar in size, age, and condition that sold recently for less than your assessed value), photos documenting property defects, and any independent appraisals you have. Many homeowners who appeal see their assessments reduced — and some jurisdictions allow free informal hearings before a formal appeal is required.
Property Tax Rates by Major Montana Cities
Within Montana, effective property tax rates vary significantly by city and county. Here are the major areas and what to expect:
- Billings— rates in this area may differ from the 0.84% statewide average. Use the calculator above with your specific assessed value for a more accurate estimate.
- Missoula— rates in this area may differ from the 0.84% statewide average. Use the calculator above with your specific assessed value for a more accurate estimate.
- Great Falls— rates in this area may differ from the 0.84% statewide average. Use the calculator above with your specific assessed value for a more accurate estimate.
- Bozeman— rates in this area may differ from the 0.84% statewide average. Use the calculator above with your specific assessed value for a more accurate estimate.
- Butte— rates in this area may differ from the 0.84% statewide average. Use the calculator above with your specific assessed value for a more accurate estimate.
Note: County rates within Montana can range from well below to well above the statewide average. Always verify the current mill rate with your county assessor's office.
Pro Tips for Montana Property Owners
- Apply for every exemption you qualify for — many homeowners leave money on the table by not filing for the homestead or senior exemption. Applications are typically annual or one-time, and deadlines are firm.
- Review your assessment notice every year. If the county's estimate of your home's market value seems too high relative to what similar homes are actually selling for, appeal it. Even a 10% reduction on a $400,000 assessment saves $400–$700/year at typical Montana rates.
- If you have a mortgage, confirm with your lender whether property taxes are paid via an escrow account. If so, ensure your escrow balance is adequate — under-funded escrow leads to an escrow shortage and a sudden increase in your monthly mortgage payment.
- Pay early if your state offers discounts. Some states (like Florida) give 1–4% discounts for early payment. On a $5,000 tax bill, a 4% early-payment discount saves $200 — for essentially zero work.
- Property taxes are generally deductible on your federal income tax return as part of the SALT deduction (state and local taxes), subject to the $10,000 cap introduced by the Tax Cuts and Jobs Act. For high-tax states, this cap is often a binding constraint.