Assessment Ratio
100%
Appeal Deadline
Fourth Monday of June, 2026
Official Form
Board of Equalization petition
Risk of Increase
Yes
How Assessment Works in Idaho
Idaho assesses property at 100% of market value. Your assessed value should reflect what your home would sell for on the open market as of January 1 of the assessment year.
Risk of Increase
In Idaho, filing a appeal can result in your assessed value being increased. This is uncommon when you have strong evidence of over-assessment, but you should be aware of this possibility. ProtestMax only recommends filing when our analysis shows a clear case for reduction.
How to File in Idaho
File a petition with your county Board of Equalization by the fourth Monday of June. Forms are available at the county assessor's office.
Step-by-Step
Idaho Appeal Process
Receive your assessment notice from the county assessor (mailed in June).
Contact the assessor's office for an informal review.
If unresolved, file an appeal with the county Board of Equalization by the fourth Monday of June.
Attend the hearing and present comparable sales evidence.
If denied, appeal to the Idaho Board of Tax Appeals within 30 days.
FAQ
Idaho Property Tax Appeal Questions
Can my Idaho assessment increase on appeal?
Yes. The Board of Equalization can increase your assessment. However, this is uncommon when you present clear evidence that your assessment exceeds market value.
What is the homeowner's exemption in Idaho?
Idaho offers a homeowner's exemption that reduces the taxable value of your primary residence by 50% of the assessed value, up to a maximum set by the state (currently $125,000). This exemption must be applied for separately.
How often are Idaho properties reassessed?
Idaho reassesses all property annually based on market conditions as of January 1. The county assessor is required to value all property at current market value each year.
What is the effective property tax rate in Idaho?
Idaho property tax rates vary by county, municipality, and school district, but the effective rate (annual tax paid divided by market value) typically ranges from about 0.5% to 2.5%. Because Idaho assesses property at 100% of market value, your actual tax bill depends on both the assessed value and the local millage or mill levy applied on top of it. If your assessed value is higher than comparable sales support, filing a appeal is one of the only ways to reduce your effective rate without waiting for a reassessment.
How long does a property tax appeal take in Idaho?
Most Idaho appeals take between 6 weeks and 6 months from filing to final decision. After you file Board of Equalization petition, the assessor or review board schedules a hearing — typically within 30 to 90 days — and issues a written decision shortly after. Cases that settle informally resolve faster, while cases that advance to a formal hearing or court appeal can take several additional months. ProtestMax prepares your full evidence packet in minutes so you can file immediately and start the clock.
Can I appeal my property taxes every year in Idaho?
Yes. In Idaho, homeowners generally have the right to appeal their property tax assessment every year, as long as you file by the Fourth Monday of June, 2026 deadline. Even if you won a reduction last year, your assessor can revalue your property the following year, and you retain the right to challenge the new value. Annual appeals are especially important during years when market values are flat or falling but assessments keep rising.
What evidence is most persuasive in Idaho hearings?
The strongest evidence in a Idaho appeal hearing is recent comparable sales — homes similar to yours in size, age, condition, and location that sold for less than your assessed value within the last 6 to 12 months. Equity comparisons (similar homes assessed for less than yours) are also highly persuasive. Photos of deferred maintenance, structural issues, or negative location factors (busy roads, flood zones, power lines) strengthen your case further. ProtestMax assembles all of this evidence into a hearing-ready packet tailored to Idaho's rules.