how do you calculate noninterest income 
noninterest income is generally calculated per instrument or service for instance if a bank loaned an amount to a customer with an origination fee of 500 and service charges of 100 the noninterest income for the loan is 600 while the interest income from the loan is not counted the bottom linenoninterest expenses are the portion of a bank s expenses that are not funds paid to customers or other banks in the form of interest for example purchasing equipment contracting professional services wages and salaries and advertising are all noninterest expenses banks need to distinguish between interest and noninterest expenses because they are fixed operating costs whereas interest expenses are not creating transparency by separating the two allows interesting parties to understand a bank s expenses better and lets it manage its finances to maximize profits 