Ada County, Idaho Property Taxes
Median Ada County effective property tax rate: 0.58%, significantly lower than the national median of 1.02%.
Median Ada County home value: $433,000
Median annual Ada County tax bill: $2,663, $263 higher than the national median property tax bill of $2,400.
How are property taxes in Ada County calculated?
Property taxes in Ada 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 Boise or another part of Ada County, knowing local tax details benefits homeowners and investors.
Last Updated March 1, 2025
Ada County, Idaho Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
0.58%
Estimate Property Tax Bill
$2,511
$2,331
Property Tax Rates Across Ada County, Idaho
Local government entities are responsible for setting tax rates, which can vary significantly within a state. Each year, counties estimate their required budget to provide essential services and divide that by the total value of all taxable property within their jurisdiction. This calculation determines the property tax rate. While votes and laws play a role in setting these rates and budgets, this is essentially the annual process.
Ada County's effective property tax rate offers an interesting comparison to other counties in Idaho and the U.S. median property tax rate. With a median tax rate of 0.58%, Ada County's rate is notably lower than the national median of 1.02%. This can be appealing for property owners looking for lower tax obligations. Within Idaho, Boise has the highest median tax rate at 0.73%, while Nampa enjoys the lowest at 0.43%. These variations highlight the importance of understanding how property tax rates can differ even within a single state. For property owners, this knowledge can be crucial in making informed decisions about where to live or invest.
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 Ada County Tax Rate
0.58%
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 Idaho Tax Rate
0.50%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Ada County, Idaho
| City | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Boise | 0.43% | 0.60% | 0.73% | 0.86% | 1.00% |
| Eagle | 0.37% | 0.42% | 0.45% | 0.49% | 0.54% |
| Garden City | 0.37% | 0.49% | 0.65% | 0.79% | 0.90% |
| Kuna | 0.37% | 0.47% | 0.52% | 0.58% | 0.71% |
| Melba | 0.23% | 0.28% | 0.33% | 0.42% | 0.43% |
| Meridian | 0.42% | 0.47% | 0.51% | 0.55% | 0.64% |
| Nampa | 0.32% | 0.37% | 0.43% | 0.50% | 0.53% |
| Star | 0.34% | 0.44% | 0.50% | 0.55% | 0.62% |
Source: Ownwell
Property Tax Assessment Values Across Ada County, Idaho
When examining property taxes in Ada 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 Ada 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 Ada 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 Ada County. For example, the median tax bill in Ada County is $2,400, with tax bills ranging significantly across the county. Eagle has the highest median home price at $705,350.
Median Ada County Market Value
$433,000
Median Idaho Market Value
$374,698
Median United States Market Value
$235,294
Property Tax Assessment Values Across Ada County, Idaho
| City | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Boise | $301,700 | $344,800 | $414,500 | $544,800 | $730,200 |
| Eagle | $411,490 | $502,600 | $705,350 | $981,550 | $1,387,610 |
| Garden City | $265,300 | $330,150 | $458,700 | $639,700 | $871,750 |
| Kuna | $282,010 | $316,300 | $368,650 | $451,575 | $560,490 |
| Melba | $197,610 | $262,375 | $353,450 | $484,575 | $689,600 |
| Meridian | $324,800 | $369,100 | $441,800 | $563,625 | $691,300 |
| Nampa | $375,450 | $501,050 | $687,400 | $942,550 | $1,141,960 |
| Star | $306,590 | $386,975 | $469,350 | $616,825 | $752,870 |
Source: Ownwell
Property Tax Bills Across Ada County, Idaho
Median Ada County Tax Bill
$2,663
Median Idaho Tax Bill
$1,894
Median United States Tax Bill
$2,400
Property Tax Bills Across Ada County, Idaho
| City | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Boise | $1,575 | $2,157 | $2,994 | $4,269 | $6,310 |
| Eagle | $1,601 | $2,204 | $3,215 | $4,453 | $6,453 |
| Garden City | $1,178 | $1,838 | $2,927 | $4,127 | $5,432 |
| Kuna | $1,101 | $1,565 | $2,000 | $2,533 | $3,028 |
| Melba | $501 | $811 | $1,142 | $1,722 | $2,708 |
| Meridian | $1,463 | $1,823 | $2,311 | $2,944 | $3,721 |
| Nampa | $1,462 | $1,926 | $3,003 | $4,408 | $5,581 |
| Star | $850 | $1,767 | $2,388 | $3,219 | $4,085 |
Source: Ownwell