When are property taxes due in Custer County, Idaho?

Custer County property taxes are due December 20. A second installment is due June 20. This deadline applies to all counties in Idaho.

What is the penalty for late property tax payment in Custer County, Idaho?

The late payment penalty in Custer County is 2% + 1% per month interest.

How do I pay Custer County, Idaho property taxes?

You can pay Custer County property taxes by mail to the county treasurer.

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Custer County Property Tax Due Date

Idaho

(208) 879-2330

2026 Property Tax Due Dates

Official Source

Installment 1

December 20

Full payment or first half

Installment 2

June 20

Second half (if split)

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Penalty: 2% + 1% per month interestGrace period: None

Payment Methods

Online, Mail, In-Person

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Idaho Laws That May Affect Your Property Taxes

Idaho recently changed homestead exemption rules and property assessment methods — effective January 1, 2026. See which bills passed and what they mean for your bill.

View on Tally Idaho →

Custer County Treasurer

Treasurer

Allicyn Latimer

Phone

(208) 879-2330

Fax

(208) 879-6691

Office Address

801 E. Main Ave. #350
Challis, ID 83226

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Mailing Address

PO Box 350, Challis, ID 83226

Office Hours

Mon-Fri 8am - 5pm

How to Pay

Online

Pay using credit card or e-check

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By Mail

Mail check payable to Custer County Treasurer — PO Box 350, Challis, ID 83226

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In Person

Visit the Treasurer's office — 801 E. Main Ave. #350, Challis ID 83226, Mon-Fri 8am - 5pm

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Other Counties in Idaho

Ada Adams Bannock Bear Lake Benewah Bingham Blaine Boise

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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.

Source: Wikipedia — content available under CC BY-SA 4.0

Related Resources

CountyRollCounty Office Directory

Find the assessor, treasurer & recorder for Custer

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Property Tax FAQ Tax Calendar

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We'll email you 14 days before your property taxes are due.

Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.