Estimate your Idaho property tax based on the state's 0.46% average effective rate. Enter your home value for an instant, free calculation.
Enter any tax exemption amount you qualify for in Idaho
Idaho has among the lowest effective property tax rates in the nation, helped by a generous homeowner's exemption that knocks out half of a primary residence's value (up to $125,000). Local districts, not the state, set the rates.
County assessors appraise all taxable property at 100% of current market value each year. Property taxes are levied by overlapping local districts — counties, cities, school districts, highway districts — not the state, with each setting a levy rate against its taxable value. Idaho caps most districts' annual budget increase at 3% over the highest of the prior three years, plus new construction.
| Home Value | Estimated Annual Tax | Monthly (Escrow) |
|---|---|---|
| $250,000 | $1,150 | $96/mo |
| $366,000 (median) | $1,684 | $140/mo |
| $600,000 | $2,760 | $230/mo |
Effective rates vary within Idaho. These figures are median-tax-to-median-value estimates from U.S. Census ACS data (2019–2023 ACS 5-year (SmartAsset)) for some of the most populous counties:
| County | Effective Rate |
|---|---|
| Ada County | 0.44% |
| Canyon County | 0.47% |
| Kootenai County | 0.36% |
| Bonneville County | 0.46% |
| Bannock County | 0.52% |
| Twin Falls County | 0.55% |
Among these counties, effective rates range from about 0.36% in Kootenai County to 0.55% in Twin Falls County. Your actual rate depends on the local mill/millage set by your county, city, and school district.
Idaho's Homeowner's Exemption exempts 50% of the value of an owner-occupied primary residence plus up to one acre, capped at $125,000 of value. It applies only to primary residences — on a $200,000 home it removes $100,000; on a $300,000 home it removes the maximum $125,000.
The Property Tax Reduction ('circuit breaker') can cut tax on a home and up to one acre by $250 to $1,500 for qualifying owners who are 65+, widowed, blind, disabled, or a former POW; for 2026 taxes, 2025 income after the medical deduction generally must be $39,130 or less. A separate benefit for veterans rated 100% service-connected disabled reduces tax by up to $1,500 with no income limit. Both require the homeowner's exemption and an application between January 1 and April 15.
Annual tax notices are mailed in late November. Taxes may be paid in two installments — the first half due December 20 and the second June 20 — or in full by December 20. Unpaid amounts accrue late charges and interest, with a tax lien and eventual county tax deed after prolonged delinquency.
Contact the county assessor first, then file a formal appeal with the county Board of Equalization (the commissioners) by the fourth Monday in June. If unsatisfied, appeal to the Idaho Board of Tax Appeals or district court, generally within 30 days of the board's decision.
Idaho's statewide average effective property tax rate is about 0.50% of home value, among the lowest in the nation. Effective rates vary by county, roughly 0.36% to 0.55% among the most populous, because local districts set their own levies and the homeowner's exemption reduces taxable value.
If you own and occupy your home as a primary residence, Idaho exempts 50% of the value of the home plus up to one acre, up to a $125,000 cap. On a $200,000 home the exemption removes $100,000, and on a $300,000 home it removes the maximum $125,000.
Tax notices go out in late November. You can pay in two installments — the first half by December 20 and the second by June 20 — or the full bill by December 20. Late payments accrue interest and penalties.