Idaho Property Tax Appeal Guide
Idaho assesses property at full market value as of January 1, with a homeowner's exemption reducing taxable value on owner-occupied homes.
100%
Statutory percentage
4th Monday in June (County Board of Equalization)
Verified July 2026 — confirm on your notice
Idaho Code § 63-501A (appeals to board of equalization)
Governing state code
How to File in Idaho
Review the assessment notice mailed by the county assessor by the first Monday in June.
Contact the assessor's office for an informal discussion of your value.
File an appeal with the County Board of Equalization by the fourth Monday in June.
Present comparable sales or an appraisal at your hearing.
Appeal to the State Board of Tax Appeals or district court within 30 days if needed.
Deadlines and ratios vary by county and change over time — always confirm with your local assessor. This is general information, not legal advice.
Are you actually over-assessed in Idaho?
Check this property against recent comparable sales for $4.99. If the evidence says you have no case, you know that before you spend a filing deadline on it — and if it does, the same $4.99 is credited toward the full appeal packet.
A worked example in Idaho
Say the assessor values your home at $400,000, but comparable sales show it is really worth $350,000 — a $50,000 over-assessment. Idaho taxes the full market value, so the taxable amount drops by the same amount. At a typical effective rate of ~1.5%, that is about $750 back in your pocket every year until the value is corrected.
Illustration only. Your actual rate, exemptions, and savings depend on your county and taxing districts — run your own numbers.
Common grounds for a Idaho appeal
Over-market valuation. Comparable sales of similar nearby homes closed below the value the assessor placed on yours.
Errors in the property record. The county has the wrong square footage, bedroom or bathroom count, lot size, or condition on file.
Unequal (non-uniform) assessment. Comparable properties in your area are assessed for less than yours, regardless of market value.
Physical or external problems. Deferred maintenance, functional issues, or an external nuisance depress what a buyer would pay.
Overvaluation · Incorrect classification · Denial of exemption
Don’t overlook exemptions
An appeal lowers your value, but exemptions cut your taxable base directly — and both stack. Most owners qualify for a homestead exemption on their primary residence, and many states add relief for owners over 65, veterans, and people with disabilities. Confirm you are enrolled with your Idaho county assessor before filing — it is the fastest saving most people miss.
- Homeowner's Exemption 50% up to $125,000
- Owner-occupied primary residence
- Circuit Breaker Up to $1,500 reduction
- Age 65+, disabled, income limits
Who hears a Idaho appeal
Your appeal is decided by County Board of Equalization — the value itself is set by the County Assessor, which is who you are disagreeing with.
- 1
County Board of Equalization
- 2
State Board of Tax Appeals
- 3
District Court
Each stage has its own deadline. Missing the first one usually closes the later ones for that tax year.
Key Idaho statutes
The sections a Idaho appeal is argued under. Quote one exactly as written — a paraphrased or renumbered citation is worse than none.
- I.C. §63-205
- Assessment of Real Property
- I.C. §63-501
- Board of Equalization
- I.C. §63-602G
- Homeowner's Exemption
- I.C. §63-705
- Circuit Breaker
Official Idaho resources
These are state government sites. The form and portal you actually file through are published by your county assessor.
Idaho property tax appeal questions
- When is the deadline to appeal property taxes in Idaho?
- 4th Monday in June (County Board of Equalization). Verified July 2026. Deadlines vary by county and change from year to year, so always confirm the date printed on your own assessment notice before you file.
- Who decides a property tax appeal in Idaho?
- County Board of Equalization hears it. The full path is: County Board of Equalization, then State Board of Tax Appeals, then District Court.
- What is the assessment ratio in Idaho?
- 100% of market value. That is the share of value your bill is calculated on, so lowering the assessed value lowers the bill proportionally.
- What grounds can I appeal on in Idaho?
- Idaho recognises these grounds: Overvaluation, Incorrect classification, Denial of exemption. Overvaluation is the most common — you show comparable sales that closed below your assessed value.
- What property tax exemptions does Idaho offer?
- Homeowner's Exemption — 50% up to $125,000, for owner-occupied primary residence; Circuit Breaker — Up to $1,500 reduction, for age 65+, disabled, income limits. Exemptions reduce your taxable base directly and stack with an appeal, so check both.
- What is the average property tax rate in Idaho?
- About 0.5% of market value per year statewide. Your own rate depends on your county and its taxing districts, so treat this as a benchmark rather than your bill.
Idaho Tax Estimator
$0 / yr
Based on 100% ratio & avg. millage. Estimate only.
Generate your Idaho appeal packet
Check your property for $4.99 (credited), then get the full comparable-sales packet and AI appeal letter for a flat $29 — $19 at launch.