Ada County, Idaho property tax
The median homeowner in Ada County, Idaho pays $2,643 a year in property tax on a home worth $476,000, an effective rate of 0.56%. The national effective rate is 0.98%.
What the rate means here
At 0.56%, Ada County taxes property more lightly than the national 0.98%. This is the case where the rate misleads. Owners pay $2,643 a year, which is what matters, and the low percentage is a function of what housing is worth rather than of restraint by the county.
It ranks #12 of 37 Idaho counties by effective rate, against a statewide 0.53%, and #2,216 nationally. The state runs from 0.87% in Nez Perce County down to 0.30% in Valley County.
The median home costs 5.35 times the median household income of $88,907, against 3.86 nationally, so housing absorbs an unusually large share of what people here earn. Renters pay 19.77% of median income in gross rent. At 508,052 residents the county is large enough that its median blends several distinct housing markets.
The rate is derived rather than quoted. How and why.
What that costs at different home values
Arithmetic at the county effective rate, before any exemption or assessment cap.
Housing and income
| Ada County | Idaho | United States | |
|---|---|---|---|
| Effective property tax | 0.56% | 0.53% | 0.98% |
| Median tax bill | $2,643 | $2,006 | $2,969 |
| Median home value | $476,000 | $376,000 | $303,400 |
| Median gross rent | $1,465 | $1,150 | $1,348 |
| Median household income | $88,907 | $74,636 | $78,538 |
| Home price to income | 5.35× | 5.04× | 3.86× |
| Rent as share of income | 19.77% | 18.49% | 20.6% |
| Owner-occupied | 71.35% | 72.37% | 65.02% |
Source: U.S. Census Bureau, American Community Survey 2023 five-year estimates. Population 508,052.
Nearby counties of similar size
| County | Rate | Median bill | Home value |
|---|---|---|---|
| Canyon County | 0.57% | $1,996 | $350,300 |
| Kootenai County | 0.47% | $2,203 | $467,400 |
| Bonneville County | 0.55% | $1,811 | $327,000 |
| Twin Falls County | 0.67% | $1,951 | $292,700 |
| Bannock County | 0.72% | $1,918 | $267,200 |
Ada County property tax: common questions
What is the property tax rate in Ada County, Idaho?
The effective rate is 0.56% of home value, from a median tax bill of $2,643 against a median home value of $476,000. That is 0.42 points below the national 0.98%.
How much is property tax on a $400,000 home in Ada County?
Roughly $2,240 a year at the county effective rate of 0.56%.
Is Ada County expensive compared with the rest of Idaho?
It ranks #12 of 37 Idaho counties by effective property tax rate, and #2216 of 2,826 nationally. That is 0.03 points above the Idaho average of 0.53%.
What does housing cost in Ada County?
The median home is worth $476,000 and median gross rent is $1,465 a month. Median household income is $88,907, which puts the home at 5.35 times annual income and rent at 19.77% of it.