All accounts opened online include free access to our Internet Banking product, I-Bank.

New accounts may be opened by new and existing First Interstate Bank customers living in the Montana, Wyoming, and South Dakota region. Process may take 10-15 minutes.

Consumer deposit products offered:

• Checking Accounts:
  • Preferred, Regular, Free and MarketManager
• Savings Accounts:
  • Market Interest, Regular
• Certificates of Deposit:
  • 7 month, 13 month, 25 month, 37 month

New Customer, you will need the following:

• Process may take 10-15 minutes.
• US Social Security Number
• A valid form of identification including: Driver’s License, State ID, Military ID, Tribal ID, or Passport.
• Previous home address (if you have lived at your current home address less than two years).
• Credit Card, Debit Card, U.S. Checking or Savings account to fund your new account(s).
• Email address

Existing Customer, you will need the following:

(The information requested is to verify you and your account information)

• US Social Security Number
• Any First Interstate Bank Account Number where you are a primary signer.
• You will be prompted to verify the balance of an existing account. Only the last 4 digits of the account will be shown.
• You will be prompted to verify the last 4 digits of a Day or Evening phone number that First Interstate Bank has on file.
• Credit Card, Debit Card, U.S. Checking or Savings account to fund your new account(s).
• Email address

In order to complete this process, you will need to print, complete, sign, and mail account agreement(s) to:

First Interstate Bank
Internet Branch
PO Box 31551
Billings, MT 59116-0001

You will have 14 days to return the signature card, or the account will not be opened and any funds deposited will be returned to you.

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What's the next step?

Open an Account
Enroll in I-Bank

Enhance your account
Sign up for these convenient services:

• I-Bank - Internet Banking
• I-Pay - Internet Bill Pay
• VISA Platinum ScoreCard®