Online Banking

We offer several online products for your needs.

Sign in Access your account from any of your devices!


Online Banking Solutions

With online banking, you can securely manage your accounts from any computer, anytime. You can also review transactions, deposits, checks cleared and view your previous months statements.


Banking operates around your schedule with our free mobile banking services. In general, people don’t stay in one place; we tend to roam around. With your mobile phone in hand, 1st Security Bank travels with you.

Check balances, and transfer funds from the convenience of your phone. Save time by eliminating unnecessary trips to the bank and add peace of mind, knowing you always have access to your finances.

To get set up with mobile banking, you will first need to set up an online banking account. If you have not completed this step, click HERE to get set up. (HERE will take you to our Register page where you can agree to online setup)


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1st Security Bank is now offering Mobile Deposit! Simply download and login to our TouchBanking mobile application and follow the step-by-step instructions on depositing your check! Some restrictions may apply.

For any questions call (406) 323-1100 or stop by at 401 Main St. Roundup, MT and talk to our friendly staff!


1st Security Bank is bringing you Banzai, the financial education program used by millions of teachers around the country, to you and your home. Experience real-world financial education in a fun, safe way.


1st Security Bank has chosen to partner with Banzai! to give back to the community and to support our customers. In todays world, financial education is evolving and we want to do our part to help you keep up! Have you ever thought, “I wish they would have taught me about “taxes, checking accounts, loans, etc.” in school?”. From taxes to checking accounts Banzai! covers it all! We have provided courses, financial articles and calculators for students and adults alike to prepare for the world today. To get set up go to to get set up.

For any questions call (406) 323-1100 or stop by at 401 Main St. Roundup, MT and talk to our friendly staff!

Financial Calculators

We’ve put together some of the most popular calculators to help answer your most common questions. If you have any specific questions, feel free to meet with one of our experienced personal bankers. Just stop on by at 1st Security Bank at 401 Main St in Roundup or give us a call at (406) 323-1100.

Click the button below to view the calculators that we have to offer!

Financial Calculators




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