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.
Category: Business Service: Credit Cards | Updated: September 30th, 2015
First Interstate Bank
PO Box 31615
Billings, MT 59107
ACH Payments: Set up through your local branch or our customer service line (M-F, 8am-5pm) toll free at 1-888-833-3453 option #3.
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