2026 Property Tax Due Dates
December 20
Full payment or first half
June 20
Second half (if split)
Payment Methods
Online, Mail, In-Person
Custer County Treasurer
Phone
(208) 879-2330Fax
(208) 879-6691
Mailing Address
PO Box 350, Challis, ID 83226
Office Hours
How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Custer County Treasurer — PO Box 350, Challis, ID 83226
In Person
Visit the Treasurer's office — 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.
Related Resources
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Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.