The minimum balance requirement for maintaining an account at First Interstate Bank can vary based on the type of account you are looking to open. Generally, First Interstate Bank offers various account types, including personal checking accounts, savings accounts, and business accounts, each with its own specific balance requirements. Some accounts may have no minimum balance requirements, while others might require a set amount to avoid monthly service fees. It is important to review the specific terms and conditions associated with each account type. For the most accurate and up-to-date information regarding minimum balance requirements, it is advisable to visit the official First Interstate Bank website or check the account details provided there, as they can offer comprehensive insights into all available options.