Montana property tax
Official source data 2024
On a $400,000 home in Montana
$2,866
estimated annual property tax
ACS 2020-2024 ratio of medians. This estimate does not use your parcel’s assessment or district tax rates.
Make it your number.
Your actual bill depends on your local assessment, exemptions, and taxing districts.
A home value. A yearly budget.
These scenarios use the same 0.72% effective rate. They do not predict an individual tax assessment.
| Home value | Annual estimate | Monthly budget |
|---|---|---|
| $100,000 | $717 | $60 |
| $150,000 | $1,075 | $90 |
| $200,000 | $1,433 | $119 |
| $250,000 | $1,792 | $149 |
| $300,000 | $2,150 | $179 |
| $350,000 | $2,508 | $209 |
| $400,000 | $2,866 | $239 |
| $450,000 | $3,225 | $269 |
| $500,000 | $3,583 | $299 |
| $600,000 | $4,300 | $358 |
| $750,000 | $5,375 | $448 |
| $1,000,000 | $7,166 | $597 |
| $1,250,000 | $8,958 | $746 |
| $1,500,000 | $10,749 | $896 |
| $1,750,000 | $12,541 | $1,045 |
| $2,000,000 | $14,332 | $1,194 |
Property tax by county.
56 counties and county equivalents in Montana. Median taxes and values come from ACS 2024.
| County | Effective rate | Median tax paid | Your value estimate |
|---|---|---|---|
| Yellowstone County | 0.81% | $2,832 | $3,241 |
| Gallatin County | 0.59% | $3,933 | $2,357 |
| Missoula County | 0.88% | $4,150 | $3,516 |
| Flathead County | 0.58% | $3,120 | $2,331 |
| Cascade County | 0.87% | $2,320 | $3,498 |
| Lewis and Clark County | 0.79% | $3,113 | $3,164 |
| Ravalli County | 0.50% | $2,380 | $1,997 |
| Silver Bow County | 0.98% | $2,500 | $3,918 |
| Lake County | 0.61% | $2,561 | $2,429 |
| Lincoln County | 0.54% | $1,615 | $2,179 |
| Park County | 0.56% | $2,641 | $2,260 |
| Hill County | 0.98% | $1,980 | $3,909 |
| Glacier County | 0.84% | $1,391 | $3,370 |
| Sanders County | 0.53% | $1,889 | $2,105 |
| Big Horn County | 1.10% | $1,574 | $4,391 |
| Jefferson County | 0.55% | $2,446 | $2,189 |
| Custer County | 1.03% | $2,264 | $4,133 |
| Fergus County | 0.75% | $1,769 | $2,997 |
| Richland County | 0.74% | $1,934 | $2,941 |
| Carbon County | 0.54% | $2,281 | $2,168 |
| Roosevelt County | 1.28% | $1,522 | $5,125 |
| Beaverhead County | 0.67% | $2,069 | $2,684 |
| Deer Lodge County | 0.78% | $1,803 | $3,113 |
| Madison County | 0.41% | $1,937 | $1,648 |
| Stillwater County | 0.57% | $2,319 | $2,286 |
What can change your bill?
The ACS effective rate is a ratio of medians, not a statutory rate. Local assessed values, levies, classification, caps and exemptions determine the actual bill.
Exemptions & assessment
No uniform flat exemption is applied. Enter your assessor-provided assessment ratio and qualifying exemption for a separate statutory scenario.
Payment dates & appeals
Residential first-half payment is due November 30 or 30 days after the tax notice postmark, whichever is later; the second half is due May 31. Weekend/holiday dates move to the next business day.
The 2025-2026 appraisal-cycle guidance uses 30 days from the notice for an AB-26 review or direct county-board appeal. It also described a June 1, 2026 late filing option affecting only the second year. Confirm eligibility before relying on that exception.
Check Montana’s official property-tax guidance
Use an assessed value, exemption, and local millage
This separate scenario needs your assessor’s inputs. An exemption applies only to eligible levies; do not apply it to the county’s historical effective rate.
Good questions. Clear answers.
How much is property tax on a $400,000 home in Montana?
The historical effective-rate estimate is $2,866 per year, or $239 a month. It multiplies $400,000 by 0.72%.
Is the effective rate the rate on my tax bill?
No. It is median real-estate taxes paid divided by median home value in the ACS 2020-2024 survey. Your taxing districts, assessed value, classification and exemptions determine your bill.
Can I subtract a homestead exemption from this estimate?
Use the separate statutory scenario with a qualifying levy. Subtracting an exemption from an ACS effective-rate estimate can double-count relief already reflected in taxes paid.
Does a higher purchase price change my assessment?
Assessment rules and reassessment dates vary by state and locality. Contact the linked official property-tax office before relying on a historical county ratio.
How do I appeal a property-tax assessment?
Read the deadline and procedure on your assessment notice, then use the official state guidance above to locate your assessor or review board. County survey data does not establish your appeal deadline.
Check the source.
Data as of 2024. Retrieved .
- www2.census.gov / Geos20245YR.txt
- www.census.gov / notes-on-acs-estimate-and-annotation-values.html
- www2.census.gov / acsdt5y2024-b01003.dat
- www2.census.gov / acsdt5y2024-b25077.dat
- www2.census.gov / acsdt5y2024-b25103.dat
- www2.census.gov / acsdt5y2024-b25064.dat
- www2.census.gov / acsdt5y2024-b19013.dat
- mtrevenue.gov / property As of 2026-10-02
- revenue.mt.gov / residential As of 2026-10-02
- revenue.mt.gov / appeals-and-reviews As of 2026-10-02
- revenue.mt.gov / request-for-informal-classification-and-appraisal-review-form-ab-26 As of 2026-10-02