iTax Search Help

This site is provided for use by the public and can be used to search current and historical data on properties and make payments using a Visa/MasterCard or Discover credit or debit card or via an electronic check (e-check) process (third party charges apply).


2019 Real Property tax bills are now available on this site.  Actual bills were mailed the first part of November and were sent to the owner of record.  If you haven’t received your bill and would like a physical copy sent to you, please call 406-582-3030 or email us at



·         2019 REAL PROPERTY TAXES:  1ST HALF: December 4, 2019         2ND HALF:  June 1, 2020  

·         2019 MOBILE HOME TAXES:  2ND HALF:  December 2, 2019


Payments must be received by 5:00 PM on the due date listed above, or postmarked on or before the due date.  Taxes become delinquent if not paid by the due date and will be assessed interest at the rate of 5/6 of 1% per month from the time of delinquency until paid and a one-time 2% penalty fee will be added to the delinquent tax.

 PLEASE NOTE:  It takes a few days to process payments.  If you mailed your payment close to the deadline, your parcel status may show as delinquent.  Please contact our office at the number below if the status continues to show as delinquent longer than one week after the deadline.

If the status of your parcel shows as “Current, Assignment Taken” please call the Treasurer’s Office at 406-582-3033 as soon as possible to avoid the potential loss of your property.


·       Use only one criterion (i.e. name or address or parcel #) to avoid an incomplete search.

·       When searching by owner name, enter the last name followed by the first name or initial.   Example:  SMITH JOE OR SMITH J    Do not       include commas or other punctuation.

·       To make an online payment using a credit/debit card or via an electronic check (e-check) process, click the PAY TAXES link which can be found just above the mailing address.