Efficiency Ratio

What Is an Efficiency Ratio?

The efficiency ratio is a measure of how well a bank controls its costs relative to the money it earns. It is most often used for financial institution|banks and similar lenders, where spending falls into fairly predictable categories such as staff pay, branch costs, and technology. A lower ratio means the bank spends less to produce each unit of revenue, which is generally viewed as more efficient operation.

How It Is Calculated

The standard formula divides noninterest expense by total revenue:

Efficiency Ratio = Noninterest Expense / (Net Interest Income + Noninterest Income)

Noninterest expense covers operating costs such as wages, occupancy, and equipment. net interest income is the gap between interest earned on loans and interest paid on deposits, and noninterest income includes fees and service charges. Some sources exclude one-time items or loan loss provision|loan loss provisions, so the exact definition can vary. It is worth checking how a reported figure was built before comparing it with others.

An Illustrative Example

Consider a hypothetical bank with $60 million in noninterest expense and $100 million in combined net interest and noninterest income. Its efficiency ratio would be 60%. A competitor with the same revenue but $45 million in expenses would have a ratio of 45%, meaning it spent less to earn each dollar.

Strengths and Limitations

The ratio is simple to calculate and allows quick comparisons of cost control among banks with similar business models. However, it says nothing about profitability or risk on its own. A bank can have a low ratio while taking on heavy credit risk, or a higher ratio while investing in future growth. Comparisons are most meaningful between banks of similar size and business mix, and alongside measures such as return on assets and net interest margin.