Friday May 25, 2018

Business Online Banking ACH files that must settle prior to the holiday (Memorial Day) will need to be received on Thursday, May 24th. ACH files received on Friday, May 25th will not settle until Tuesday, May 29th.

Mountain West Conversion Guide

October 9th, 2014

First Interstate Bank has been serving the financial needs of our personal and business customer for over 40 years. As a recognized leader in community banking services, we are proud to operate more than 70 banking offices throughout Montana, Wyoming, and South Dakota.

To help ease the transition from Mountain West Bank to First Interstate Bank, an account conversion guide has been developed to answer any questions regarding the conversion of Mountain West Bank accounts. In this conversion guide, you will find the following information:

  • Your new First Interstate Bank accounts as they compare to your Mountain West accounts.
  • Specific information on the conversion of CDs, loans, checking/savings accounts, ATM cards, debit cards, and more.
  • Terms and conditions of accounts and other important facts and service fees.
  • Products and services now available to you as part of the First Interstate family.

If you have any questions that cannot be answered by this guide, please contact our special customer service hotline at 1-888-833-3451 for further assistance.

View Conversion Guide