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
Jefferson County Treasurer
Treasurer
Terri Kunz
Phone
(406) 225-4100Fax
(406) 225-4104
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 Jefferson County Treasurer
In Person
Visit the Treasurer's office — 201 W Centennial Ave, Boulder MT 59632, Mon-Fri 8am - 5pm
Other Counties in Montana
About Jefferson County
Jefferson County is a county in Montana, United States. As of the 2020 census, the population was 12,085. Its county seat is Boulder.
Source: Wikipedia — content available under CC BY-SA 4.0
Related Resources
Get Deadline Reminders
We'll email you 2 weeks 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.