1 Limited time offer. The rate is a variable rate and is based upon an index and a margin. The introductory rate will vary with the First Bank Prime Rate (the index) and is based on First Bank Prime plus 0.40%. The introductory rate will remain in effect for twelve months after loan origination. After this, the variable rate will be First Bank Prime + 1.50%. Offer based on auto-debit of payments from a First Bank checking account. This offer applies only to applications for a new Simple Business Solutions Line of Credit on requests of $100,000 or less.