2026 Property Tax Due Dates
County-specificDecember 20
First Installment
June 20
Second Installment
Payment Methods
Mail, In-Person (no Online payment as of 2026-08-10)
Custer County Treasurer
Treasurer
Allicyn Latimer
Phone
(208) 879-2330Fax
(208) 879-6691
Mailing Address
PO Box 350, Challis, ID 83226-0350
Office Hours
How to Pay
Online
No online payment method available as of 2026-08-10. Credit cards accepted by phone or in person only, 2.5% fee.
By Mail
Checks payable and mailed to PO Box 350, Challis, ID 83226-0350 (USPS). FedEx/UPS: 801 E. Main Ave. #350, Challis, ID 83226-0350. — PO Box 350, Challis, ID 83226-0350
In Person
801 E. Main Ave. #350, Challis, ID 83226-0350 (Courthouse). Cash, check, or credit card (2.5% fee added) accepted at the counter. — 801 E. Main Ave. #350, Challis ID 83226, Mon-Fri 8am - 5pm
About Property Taxes in Idaho
Idaho property taxes are administered at the county level. Property is assessed at 100% of market value as of January 1 each year. Tax bills are typically mailed in October or November, with a December 20 deadline for the full amount or an option to pay in two installments. Idaho offers a meaningful homeowner exemption that exempts half of a home's value from taxation (up to a cap), making it one of the more generous homeowner exemptions in the western United States.
Payment & Assessment
Idaho property taxes are due December 20. You may pay in two equal installments: First installment: Due December 20 Second installment: Due June 20 of the following year Paying by the first installment date is also an option for paying in full. A penalty of 2% per month (up to 12% maximum) applies to late payments. Most counties offer online payment through the county treasurer's website. Contact your county assessor or treasurer for payment options.
Statewide framework for Idaho. Your county's specific rates and deadlines are shown above.
About Custer County
Custer County is a rural mountain county in the center of the U.S. state of Idaho. As of the 2020 census, the population was 4,275, making it the fifth-least populous county in Idaho. The county seat is Challis. Established in 1881, the county was named for the General Custer Mine, where gold was discovered five years earlier. Custer County relies on ranching, mining, and tourism as its main resources.
Source: Wikipedia — content available under CC BY-SA 4.0
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Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.