2026 Property Tax Due Dates
Installment 1
November 30
First installment
Installment 2
May 31
Second installment
Penalty: 2% penalty + 10% interestGrace period: None
Payment Methods
Online, Mail, In-Person
Custer County Treasurer
How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Custer County Treasurer
In Person
Visit the Treasurer's office — 1010 Main Ste 15, Miles City MT 59301, Mon-Fri 8am - 5pm
Other Counties in Montana
About Custer County
Custer County is a county located in the southeast part of the U.S. state of Montana. As of the 2020 U.S. census, the population was 11,867. Its county seat and largest town is Miles City.
Source: Wikipedia — content available under CC BY-SA 4.0
Related Resources
Get Deadline Reminders
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.