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First Security Bank is Growing!

Welcome to First Security Bank, Division of Glacier Bank!


Your local branch is soon to be locally owned. Starting July 22, 2024, you’ll benefit from local decision-making and support as a customer of First Security Bank, Division of Glacier Bank. That’s the day the Bozeman branch of Rocky Mountain Bank, a division of HTLF Bank, will officially join the First Security Bank division.

You’ll continue to be served by the same bankers you already know, along with much greater local access and support. First Security Bank’s nine other branches are available to you with convenient locations in Bozeman, Belgrade, Big Sky, Four Corners, Three Forks, and West Yellowstone.

Over the weekend of July 19-21, your banking relationship will transfer to First Security Bank. To make this transition as simple as possible, we’ll convert your current account(s) to comparable First Security Bank account(s) and services with new terms and conditions. Here are some of the most important things you need to know about the transition:
  • Online & Mobile Banking: All online and mobile banking services will be unavailable beginning Friday, July 19 at 4:00pm through the weekend. On Monday, July 22, you’ll be able to access online banking at ourbank.com and download the First Security Bank Bozeman mobile app. Your login details will be provided in a separate mailing.
  • Debit Cards & Checks: You will receive new First Security Bank debit card(s) and checks in the mail. You must activate your new card(s) and begin using your new checks starting on Monday, July 22. Note that your new debit card(s) will not work until activated. Your Rocky Mountain Bank debit card(s) and checks will no longer work beginning Monday, July 22.
  • Routing & Account Number(s): Your routing number will change to 092900613 after Friday, July 19. The Rocky Mountain Bank routing number should not be
    used after Friday, July 19. Your deposit and loan account numbers will remain the same unless notified otherwise.
We’re ready to answer any questions you may have about the transition. Please give us a call at 1.800.555.3800 or stop by the Bozeman branch.

We’re excited to welcome you to First Security Bank. We greatly appreciate your business and are committed to ensuring your transition is as smooth as possible.

Important Changes to Your Rocky Mountain Bank Bill Pay Service 

Your bill pay service will change when your banking relationship is transferred from Rocky Mountain Bank, a division of HTLF Bank to First Security Bank, Division of Glacier Bank. Please read this entire message if you use the Rocky Mountain Bank bill pay service. Action is required to ensure timely bill payment.  

The Customer Notice of Change you recently received in the mail indicated that the payees that you have set up will be automatically moved over to the new system. Due to an unforeseen issue, your payees and scheduled payments will NOT be automatically moved over to your new First Security Bank online banking account.  

Please complete the actions listed below. We are happy to answer any questions you have about this process and can be reached at 1-406-548-3900 or fsbbebanking@ourbank.com. 

By 5:00 pm Mountain on Thursday, July 18, 2024:  

  • Save a record of all payees and scheduled payments. Rocky Mountain Bank will deactivate your existing bill pay service on Friday, July 19, 2024. Once your existing bill pay service is deactivated on July 19th, there is no way to retrieve your bill payment records.  
  • Identify any bills scheduled to pay on or after Friday, July 19, 2024 that may need alternative arrangements. Refer to the Payment Timing section below to determine how to handle payments with different scheduled payment dates.   

Beginning Monday, July 22, 2024:  

  • Log in to your new First Security Bank online or mobile banking account to enroll in bill pay and set up your payees and payments.  
  • Your login details will be provided in a separate mailing. Click here to download the First Security Bank Bozeman mobile banking app. 
  • Use our online or mobile banking guide for step-by-step bill pay enrollment and payment instructions.   

Payment Timing 

First Security Bank's bill pay service offers payments electronically or by paper check. Fortunately, most payees accept electronic payments. Please allow 1-2 business days for electronic payments and 5-7 business days for payments made by check.