What a bank efficiency ratio measures

A bank's efficiency ratio is the percentage of revenue a bank spends to run itself. It divides the bank's operating expenses—salaries, rent, technology, compliance—by the revenue it brings in from loans, deposits, and services. A ratio of 60% means the bank spends 60 cents of every dollar it earns just to keep the doors open and staff paid. A ratio of 40% means it spends 40 cents.

The lower the ratio, the more profitable the bank is on the money it takes in. This matters to you because banks with lower efficiency ratios can afford to pay higher interest on savings accounts, charge lower fees, or offer better loan rates. Banks with high ratios have less room to compete on price.

The ratio is one number that tells you how lean or bloated a bank's operation is. It does not tell you whether the bank is safe, whether your deposits are insured, or whether it treats customers fairly—those are separate questions. But it does show you how much of the bank's resources go to overhead versus how much stays available for lending or paying depositors.

Key Takeaways

  • The efficiency ratio divides operating costs by revenue, so a lower number means the bank keeps more of what it earns.
  • Banks with efficiency ratios below 50% typically have room to offer competitive interest rates and lower fees.
  • Online banks often have lower efficiency ratios than brick-and-mortar banks because they spend less on physical branches and staff.
  • A bank's efficiency ratio changes year to year based on how much revenue it brings in and how much it spends on operations.

How the calculation works

The formula is straightforward: divide total operating expenses by total revenue, then multiply by 100 to get a percentage.

Operating expenses include salaries and benefits for employees, rent or mortgage on buildings, technology infrastructure, regulatory compliance costs, and marketing. They do not include loan losses or taxes. Revenue includes interest income from loans, fees charged to customers, and income from investments the bank holds.

A concrete example: if a bank spends $800 million per year on operations and brings in $1 billion in revenue, the efficiency ratio is 80%. If another bank spends $400 million on operations and brings in $1 billion, its ratio is 40%. The second bank is more efficient—it generates the same revenue with half the cost.

Why efficiency ratios vary between banks

Different types of banks have naturally different ratios. Online banks typically run at 40% to 50% because they have no physical branches, smaller staff, and lower real estate costs. Regional banks with dozens of branches often run at 55% to 65%. Large national banks with extensive branch networks, call centers, and compliance departments may run at 50% to 60%.

Within the same category, ratios vary based on business decisions. A bank that invests heavily in new technology may have a temporarily higher ratio while it builds out systems, but lower costs later. A bank that opens many new branches will see its ratio rise until those branches become profitable. A bank that cuts staff to reduce costs will see its ratio drop, but may also see customer complaints rise.

Economic conditions also matter. When interest rates are high, banks earn more revenue without spending more on operations, so their ratios drop. When interest rates fall, revenue drops but costs stay the same, so ratios rise. A recession can push ratios higher because loan losses eat into revenue.

What efficiency ratios tell you about a bank's pricing

If you are comparing two banks and one has an efficiency ratio of 45% while the other is at 65%, the first bank has more room to offer you better rates or lower fees. That bank is keeping 55 cents of every dollar earned; the second bank keeps only 35 cents. The first bank can afford to pass some of that extra profit to customers through higher savings rates or lower loan rates.

This does not mean the low-ratio bank will always offer the best rates. Banks also set prices based on competition, risk appetite, and profit targets. But a high efficiency ratio is a sign the bank is spending a lot just to operate, which limits how much it can offer you.

Efficiency ratios are public information. You can find them in a bank's quarterly earnings reports, which are filed with the Federal Deposit Insurance Corporation (FDIC) and often posted on the bank's investor relations website. The ratio is usually listed as "efficiency ratio" or sometimes "noninterest expense ratio."

How efficiency ratios compare across the banking industry

The average efficiency ratio for U.S. banks varies by year and by bank size. Large national banks typically average in the 50% to 60% range. Community banks and regional banks often run higher, at 60% to 70%, because they cannot spread fixed costs across as many customers. Online banks and fintech lenders often run lower, at 40% to 55%.

These are ranges, not fixed numbers. A bank's ratio can shift significantly from one quarter to the next based on revenue changes, one-time costs, or staffing decisions. Comparing a bank's ratio to its own history—whether it is improving or worsening—is often more useful than comparing it to other banks, because different business models produce different ratios naturally.

What efficiency ratios do not tell you

A low efficiency ratio does not mean a bank is safe or well-run. A bank could have a 40% efficiency ratio and still fail if it makes bad lending decisions, takes on too much risk, or faces a sudden loss of deposits. Safety depends on capital reserves, loan quality, and regulatory oversight—not on how efficiently the bank runs its back office.

Efficiency ratios also do not measure customer service quality, product features, or how fairly a bank treats its customers. A bank with a high ratio might spend that money on better customer support, fraud prevention, or security. A bank with a low ratio might cut corners on those things to keep costs down.

The ratio is one data point. It tells you something about the bank's cost structure and how much room it has to compete on price. It does not tell you the full story of whether a bank is right for you.

Frequently Asked Questions

Is a lower efficiency ratio always better?

Lower is generally better for customers because it means the bank has more room to offer competitive rates and lower fees. But an extremely low ratio can signal that a bank is cutting costs in ways that hurt service quality or security. A ratio of 45% to 55% is typically healthy for most banks.

Can I use efficiency ratio to decide which bank to use?

It is one factor worth looking at, especially when comparing banks in the same category—online to online, or regional to regional. But also check interest rates, fees, customer reviews, and whether the bank is FDIC-insured. Efficiency ratio alone does not tell you if a bank will serve your needs well.

Why do online banks have lower efficiency ratios?

Online banks have no physical branches, smaller staff, and lower real estate costs. They can serve millions of customers with a fraction of the overhead that a brick-and-mortar bank needs. That lower cost structure shows up directly in a lower efficiency ratio.

Does a bank's efficiency ratio affect whether my deposits are safe?

No. Safety depends on FDIC insurance, capital reserves, and regulatory oversight. A bank with a high efficiency ratio is not less safe than one with a low ratio. Both are equally protected by FDIC insurance up to $250,000 per account.

How often does a bank's efficiency ratio change?

Banks report their efficiency ratio quarterly, so you can track changes four times a year. The ratio can shift significantly from quarter to quarter based on revenue swings and one-time costs, so looking at the trend over a year or two is more useful than focusing on a single quarter.