Ada County property tax tools

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Tools for Ada County, ID

Estimated bill

About what is your home worth?

Starts at the county’s Census median: $512,300. Change it to your best estimate.

Estimated annual bill$2,655

Your home value × the county’s Census effective rate; your actual bill may differ.

Not tax or legal advice; confirm with your county.

Official tax information

Census survey, 2020–2024. Rate = median annual taxes ÷ median home value.

Census home value source

0500000US16001|512300|8186

Official source. Last verified 2026-10-24.

Census taxes paid source

0500000US16001|2655|39|2610|46|2755|64

Official source. Last verified 2026-10-24.

Late payment penalty

Not available yet

A complete date-based penalty rule and its matching cutoff have not been verified here.

Not tax or legal advice; confirm with your county.

Check the official information

Source and verification

If the December installment is not paid by the deadline, a 2% late charge is added, along with interest at 1% per month beginning January 1 following the due date. If the June installment is not paid by the deadline, a 2% late charge is added, along with interest at 1% per month beginning January 1 of the current year.

Official source. Last verified 2026-10-24.

Exemption savings

Check the exemptions that may fit. A “Yes” does not confirm eligibility; your assessor makes that decision.

Homestead exemption

Owner-occupied primary residences and up to one acre of land.

Does this describe you?YesNo

Possible annual savingsAnswer above

We’ll show the next step for this exemption.

Not tax or legal advice; confirm with your county.

Official eligibility and application

Eligibility source

Each owner-occupied primary residence (house or manufactured home) and up to one-acre of land is eligible for a Homestead Exemption.

Official source. Last verified 2026-10-24.

Savings source

This exemption allows the value of your residence and land up to one-acre be exempted at 50% of the assessed value up to a maximum of $125,000; whichever is less. To qualify, you must own and occupy your home on or before the last county business day in December. You must also submit an application to our office by the close of business on that same day for the current tax year. If you have occupied a newly constructed home after the first of the year you must apply for the Homestead Exemption within 28 days of receiving a notice of assessment for the newly occupied dwelling

Official source. Last verified 2026-10-24.

Property tax reduction (Circuit Breaker)

Qualified Idaho homeowners meeting income, home-value and eligibility requirements, including seniors age 65 or older and people with qualifying disabilities.

Does this describe you?YesNo

Possible annual savingsAnswer above

We’ll show the next step for this exemption.

Not tax or legal advice; confirm with your county.

Official eligibility and application

Eligibility source

You might qualify for a property tax reduction if all of these are true: 65 or older Disabled as recognized by the Social Security Administration, Railroad Retirement Board, Federal Civil Service, Veterans Affairs, or a public employment retirement system not covered by these agencies You own and occupy your home or mobile home, and the value doesn’t exceed a limit set by law that will be calculated in June. Your total prior year’s income, after deducting medical expenses, was less than or equal to the maximum income level listed in the annual Property Tax Reduction Brochure.

Official source. Last verified 2026-10-24.

Savings source

This program may reduce property taxes on your home and up to one acre of land by as much as $1,500. Applications must be received between January 1 and April 15*.

Official source. Last verified 2026-10-24.

Veterans property tax reduction

Qualifying Idaho homeowners recognized by VA as 100% service-connected disabled, or receiving 100% compensation for individual unemployability, with a current homeowner exemption.

Does this describe you?YesNo

Possible annual savingsAnswer above

We’ll show the next step for this exemption.

Not tax or legal advice; confirm with your county.

Official eligibility and application

Eligibility source

The U.S. Department of Veterans Affairs recognizes you as 100% service-connected disabled, or you receive 100% compensation due to individual unemployability. The property must have a current homeowner’s exemption.

Official source. Last verified 2026-10-24.

Savings source

You must file the application with your assessor’s office between January 1 and April 15*. If April 15 is a weekend or a certain holiday recognized by the Internal Revenue Service, such claims shall be considered timely filed if filed on the next business day.

Official source. Last verified 2026-10-24.

Homeowner’s exemption

Owner-occupied primary residence, including manufactured homes, and up to one acre of land.

Does this describe you?YesNo

Possible annual savingsAnswer above

We’ll show the next step for this exemption.

Not tax or legal advice; confirm with your county.

Official eligibility and application

Eligibility source

If you own and occupy a home (including manufactured homes) as your primary residence, you could qualify for a homeowner’s exemption for that home and up to one acre of land.

Official source. Last verified 2026-10-24.

Estimates are separate. Do not add them together; eligibility, taxing units and restrictions can overlap.

Is my assessment too high?

Market value on your assessment notice ($)

Use market value, not assessed or taxable value.

What kind of value is on your notice?

Compared with the county medianAt the median

This compares market values only; being above the county median does not establish overassessment.

Not tax or legal advice; confirm with your county.

Official appeal information

Census survey, 2020–2024. Rate = median annual taxes ÷ median home value.

Census home value source

0500000US16001|512300|8186

Official source. Last verified 2026-10-24.

Census taxes paid source

0500000US16001|2655|39|2610|46|2755|64

Official source. Last verified 2026-10-24.

Appeal dates and filing

File primary-roll appeals by the fourth Monday of June; consult the county for other assessment rolls.

How to file: Ada County Commissioner’s Office, for the Board of Equalization.

State guidance: First appeal assessment or exemption denial to the county Board of Equalization; its decision may then go to the state Board of Tax Appeals or District Court within 30 days.

Official appeal source. Last verified 2026-10-24.

Compare counties

Compare the same home value in up to four counties.

Home value to compare ($)

Starts at the county’s Census median: $512,300. Change it to your best estimate.

Estimated annual differenceAdd a place

Enter another ZIP, city or county to compare estimated annual bills.

Not tax or legal advice; confirm with your county.

Not tax or legal advice; confirm with your county. How these estimates work.

Updated October 24, 2026, from cited verification dates. Individual sources may have earlier checks.