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ACH Schedule for Memorial Day

Business Online Banking ACH files must be received by Thursday, May 23, in order to settle before the upcoming federal holiday (Memorial Day). ACH files received on Friday, May 24, will not settle until Tuesday, May 28.

Telephone Banking


Enjoy the convenience of First Interstate Bank's 24 Hour Day & Night Telephone Banking.

With telephone banking you can obtain balance information on your checking, savings, CD, or loan account; verify transactions on your account; make account transfers; and have account statements faxed to you.

Before using our Day and Night Telephone Banking service, make sure you have your account number(s) handy. Once you have entered your account number, you will be asked for a Personal Identification Number (PIN). You may change your PIN at any time by listening to the menu options and choosing "Change your Personal Identification Number."

Our automated telephone banking system is easy to use. Simply follow the instructions given to you over the telephone. You will be offered a series of menu selections from which to choose. If you need to talk to one of our Client Contact Center personnel, simply press zero. Our representatives are available to help Monday through Friday, 7:30 a.m. to 7:00 p.m. MT and Saturday, 9:00 a.m. to 2:00 p.m. MT