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
Big Horn County Treasurer
Phone
(406) 665-9837Fax
(406) 665-9838
Mailing Address
PO Box 908
Office Hours
Mon-Fri 8am - 5pm
closed 12pm - 1pm
How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Big Horn County Treasurer — PO Box 908
In Person
Visit the Treasurer's office — 121 W 3rd St, Room 204, Hardin MT 59034, Mon-Fri 8am - 5pm
Other Counties in Montana
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.