Property tax in Custer County, Idaho
The median property tax bill in Custer County, Idaho is $1,112 a year, which is about 0.29% of the county's median home value of $381,700. That effective rate is lower than the typical Idaho county (0.45%) and lower than the national median (0.81%). These are American Community Survey 5-year estimates (2024); your own bill depends on your home's assessed value and any exemptions.
Estimate the property tax on a home in Custer County
Enter a home's market value for a ballpark at Custer County's average effective rate of 0.29% (Census). The real bill depends on the home's assessed value, the millage where it sits and any exemptions.
Estimated property tax: $1,107 / year
Property tax in Custer County at a glance
| Measure | Value |
|---|---|
| Median annual property tax | $1,112 |
| Median home value | $381,700 |
| Effective tax rate | 0.29% |
| Typical Idaho county rate | 0.45% |
| National median county rate | 0.81% |
Effective rate = median real estate taxes paid divided by median home value. Source: U.S. Census Bureau, American Community Survey 5-year estimates.
How does Custer County compare in Idaho?
Among Idaho's 44 counties, Custer County has the 44th highest effective property-tax rate. That places it among the least taxed counties in the state. Nationally, it ranks 3088th of 3135 US counties by effective rate. See every Idaho county ranked.
How much do homeowners in Custer County actually pay?
The median is only the middle bill. Across Custer County's 1,492 owner-occupied homes, 7.3% pay $3,000 or more a year in property tax, 20.6% pay at least $2,000, and 34.9% pay under $800. Another 2% report paying no property tax at all, which usually means an exemption covers the whole bill.
| Annual bill | Homes | Share |
|---|---|---|
| Under $800 | 520 | 34.9% |
| $800 to $1,499 | 512 | 34.3% |
| $1,500 to $1,999 | 123 | 8.2% |
| $2,000 to $2,999 | 198 | 13.3% |
| $3,000 or more | 109 | 7.3% |
| No property tax paid | 30 | 2% |
Owners with a mortgage pay a median of $1,276 and owners without one pay $1,059. Owners who have paid off a home have usually held it longer, and in states that cap how fast an existing owner's assessment can rise, long-held homes carry lower assessed values. Census table B25103.
How does the Custer County property tax bill compare with local incomes?
The median property tax bill of $1,112 is about 1.5% of the median income of Custer County homeowner households, $75,709 a year. That compares two middles, so a retiree in a long-held home can pay a far larger share. 76.8% of Custer County's occupied homes are lived in by their owners; renters pay property tax too, just folded into rent.
Have property taxes gone up in Custer County?
Yes. The median bill went from $583 in 2015-2019 to $1,112 in 2020-2024, a 90.7% rise. Over the same span the median home value moved 99.2%, from $191,600 to $381,700. Bills rose more slowly than values, which is what assessment caps and falling millage rates do: the county is taxing a smaller share of each home's worth.
Two Census ACS 5-year periods with no survey years in common, in each period's own dollars. A change counts only if it exceeds the combined 90% margin of error.
Property tax in counties next to Custer County
Custer County borders 6 counties.
| County | Effective rate | Median bill | Median home value |
|---|---|---|---|
| Elmore County, ID | 0.54% | $1,701 | $316,500 |
| Butte County, ID | 0.49% | $1,061 | $217,600 |
| Blaine County, ID | 0.38% | $2,778 | $735,300 |
| Lemhi County, ID | 0.35% | $1,156 | $326,100 |
| Boise County, ID | 0.34% | $1,611 | $476,100 |
| Valley County, ID | 0.3% | $1,964 | $657,000 |
| Custer County, ID (this county) | 0.29% | $1,112 | $381,700 |
How is a home assessed in Custer County?
Idaho assesses homes at 100% of market value in every county, Custer County included. How Idaho assesses and reappraises homes.
Is there a homestead exemption in Custer County?
Yes. Idaho's homeowner's exemption takes 50% of a primary home's value off the assessment, capped at $125,000. Apply once through the county assessor. That is the Idaho rule, and it applies in Custer County. Idaho's exemptions and relief programs in full.
When are property taxes due in Custer County?
Counties mail bills in November. The full amount is due by December 20, or you can split it and pay half by December 20 with the second half due by June 20. The June grace period only applies if the first half was paid in full and on time. Miss either deadline and late charges plus interest are added to whatever is outstanding.
Idaho splits the bill into 2 installments. That is the Idaho rule. Custer County issues and collects the bill, so the dates printed on your statement are the ones that bind you.
How to appeal your Custer County property assessment
You contest the assessed value with the county board of equalization, then the Idaho Board of Tax Appeals or district court. The filing deadline is typically the fourth Monday in June for property on the regular roll, or the fourth Monday in November for the subsequent roll. That is the Idaho rule; Custer County sets the exact dates and forms. The Idaho appeal process step by step.
Idaho rules from primary state sources, reviewed September 7, 2026; sources on the Idaho page.
Work out your own numbers
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How much house can I afford?
Your income, debts and down payment against the 28/36 rule lenders actually use, with Custer County's tax rate to hand.
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Mortgage calculator
Monthly payment with principal, interest, tax and insurance, plus what an extra payment saves you.
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Idaho income tax
Brackets, standard deduction and what Idaho actually taxes.
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Sales tax in Custer County
The other local tax: combined state and local rate for this county.
Sources
- Median real estate taxes paid and median home value for Custer County, Idaho: U.S. Census Bureau, American Community Survey 5-year estimates (2020-2024), tables B25103, B25077, B25102, B25119 and B25003; the five-year comparison uses the 2015-2019 estimates. Neighboring counties: Census county adjacency file.