Big Horn County, Montana Property Taxes
Property Taxes in Big Horn County, Montana
Median Big Horn County effective property tax rate: 1.23%, significantly higher than the national median of 1.02%.
Median Big Horn County home value: $100,700
Median annual Big Horn County tax bill: $1,375, $1,025 lower than the national median property tax bill of $2,400.
How are property taxes in Big Horn County calculated?
Property taxes in Big Horn County are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding your county's property tax system, exemptions, and reduction opportunities can lead to significant savings. Whether you live in Big Horn County or another part of Big Horn County, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Big Horn County, Montana Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
1.23%
Estimate Property Tax Bill
$1,239
$1,149
How Does the Big Horn County Property Tax Calculator Work?
Use this Big Horn County property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Big Horn County's median effective tax rate of 1.23% to generate your estimate.
Enter your property's estimated assessed value — the figure the appraisal district assigns for tax purposes, which is typically lower than market value after applicable exemptions. Our calculator uses the median effective rate for a more accurate estimate than the statutory millage rate alone.
Your actual bill may vary based on your specific exemptions, local school district levies, and any special assessment districts that apply to your property. Big Horn County's median tax rate is higher than Montana's 0.78% median rate, and the county's median tax bill of $1,375 is lower than the national median bill of $2,400.
For a more precise estimate, scroll down to explore city and ZIP code-level tax rate trends across Big Horn County.
Property Tax Rates Across Big Horn County, Montana
What Are Effective Property Tax Rates Across Big Horn County?
Local government entities set tax rates, which vary widely across Big Horn County. Each year, the county estimates its budget for public services and divides that total by the assessed value of all taxable property within its jurisdiction.
Below, compare Big Horn County's effective property tax rate to other counties in Montana or the U.S. median of 1.02%.
Big Horn County's median effective rate stands at 1.23%, which is higher than the national median of 1.02%. Within Big Horn County, the highest rate is found in Custer at 1.34%, while Decker has the lowest at 0.99%.
These variations reflect differences in local school district levies, special assessment districts assessments, and special district bonds — which compound the base county rate.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Big Horn County Tax Rate
1.23%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Montana Tax Rate
0.78%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Big Horn County, Montana
| City | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Bighorn | 1.14% | 1.15% | 1.23% | 1.27% | 1.30% |
| Busby | 1.07% | 1.08% | 1.14% | 1.17% | 1.23% |
| Crow Agency | 1.14% | 1.14% | 1.14% | 1.14% | 1.22% |
| Custer | 1.14% | 1.15% | 1.34% | 1.40% | 1.52% |
| Decker | 0.92% | 0.92% | 0.99% | 1.15% | 1.26% |
| Fort Smith | 1.14% | 1.14% | 1.14% | 1.14% | 1.14% |
| Garryowen | 1.14% | 1.14% | 1.27% | 1.30% | 1.38% |
| Hardin | 1.14% | 1.15% | 1.25% | 1.25% | 1.25% |
| Lodge Grass | 1.09% | 1.10% | 1.14% | 1.16% | 1.26% |
| Pryor | 0.99% | 1.11% | 1.12% | 1.16% | 1.20% |
| Saint Xavier | 1.14% | 1.14% | 1.14% | 1.20% | 1.34% |
| Wyola | 1.22% | 1.23% | 1.23% | 1.38% | 1.50% |
| Billings | N/A | N/A | N/A | N/A | N/A |
| Pompeys Pillar | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Assessment Values Across Big Horn County, Montana
When examining property taxes in Big Horn County, understanding the distinction between "market value" and "assessed value" is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Big Horn County assessor estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices:
In Big Horn County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of May.
Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Big Horn County.
For example, the median tax bill in Big Horn County is $1,375, with tax bills ranging significantly across the county. Custer has the highest median home price at $232,168.
Property Tax Assessment Values Across Big Horn County, Montana
Source: Ownwell
$32,930
$132,549
$232,168
Median Big Horn County Market Value
$100,700
Median Montana Market Value
$317,000
Median United States Market Value
$235,294
Property Tax Assessment Values Across Big Horn County, Montana
| City | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Bighorn | $20,037 | $99,409 | $172,748 | $302,236 | $368,949 |
| Busby | $7,594 | $14,105 | $56,240 | $124,204 | $294,181 |
| Crow Agency | $6,254 | $9,250 | $32,930 | $59,190 | $106,840 |
| Custer | $78,878 | $141,076 | $232,168 | $386,862 | $627,081 |
| Decker | $30,444 | $51,969 | $122,186 | $225,338 | $311,949 |
| Fort Smith | $8,084 | $19,210 | $65,650 | $116,100 | $265,238 |
| Garryowen | $9,425 | $18,328 | $62,405 | $148,414 | $214,024 |
| Hardin | $13,238 | $69,200 | $126,508 | $184,700 | $268,200 |
| Lodge Grass | $6,256 | $12,680 | $56,070 | $122,807 | $233,718 |
| Pryor | $6,258 | $9,703 | $43,345 | $155,600 | $283,980 |
| Saint Xavier | $8,680 | $32,678 | $106,190 | $270,640 | $385,700 |
| Wyola | $6,965 | $31,190 | $73,900 | $148,118 | $238,365 |
| Billings | N/A | N/A | N/A | N/A | N/A |
| Pompeys Pillar | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Bills Across Big Horn County, Montana
Property tax bills in Big Horn County are based on the assessed value of a home and the local tax rates applied to that value. The county’s median home price is $100,700, and the amount a homeowner pays can vary widely depending on where the property is located and how it is assessed. Tax bills are also influenced by local levies, which help fund public services and can change the final amount due each year.
For many homeowners, the typical tax bill falls between $585 and $2,255, while the 90th percentile reaches $3,431. The highest median tax bill is $3,437 in Custer, compared with $637 in Crow Agency. That range shows how property taxes can affect affordability, especially for owners whose bills are higher than the county median.
Median Big Horn County Tax Bill
$1,375
Median Montana Tax Bill
$2,559
Median United States Tax Bill
$2,400
Property Tax Bills Across Big Horn County, Montana
| City | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Bighorn | $1,015 | $1,710 | $2,403 | $4,056 | $4,706 |
| Busby | $266 | $539 | $1,267 | $2,394 | $3,992 |
| Crow Agency | $64 | $170 | $637 | $950 | $1,560 |
| Custer | $1,144 | $1,898 | $3,437 | $5,181 | $7,769 |
| Decker | $399 | $574 | $1,473 | $2,256 | $3,128 |
| Fort Smith | $166 | $387 | $845 | $1,493 | $3,297 |
| Garryowen | $918 | $1,213 | $1,955 | $2,492 | $3,030 |
| Hardin | $198 | $801 | $1,547 | $2,278 | $3,265 |
| Lodge Grass | $87 | $258 | $806 | $1,845 | $3,389 |
| Pryor | $97 | $280 | $1,054 | $2,712 | $3,862 |
| Saint Xavier | $137 | $632 | $1,793 | $3,478 | $4,759 |
| Wyola | $147 | $425 | $1,135 | $2,148 | $3,319 |
| Billings | N/A | N/A | N/A | N/A | N/A |
| Pompeys Pillar | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | June 1 |
Links | |
|---|---|
| Big Horn Tax Assessor | |
| Website | svc.mt.gov |