Bank Efficiency Ratio & ROE: What They Mean

This article explains what a bank’s efficiency ratio and return on equity (ROE) mean for you as a customer. You’ll learn how these two financial metrics are calculated, what they reveal about a bank’s health and competitiveness, and how to use them when comparing banks. The goal is to help you interpret these numbers so you can make more informed decisions about where to keep your money.

Formula

The efficiency ratio measures a bank’s operating expenses as a percentage of its revenue. The formula is:

Efficiency Ratio = (Operating Expenses / Total Revenue) × 100

Where:

• Operating Expenses – all costs of running the bank (salaries, rent, technology, marketing) excluding interest expenses and loan loss provisions.
• Total Revenue – net interest income plus non-interest income (fees, trading, etc.).

Return on equity (ROE) measures how effectively a bank uses shareholders’ equity to generate profit. The formula is:

ROE = (Net Income / Shareholders’ Equity) × 100

Where:

• Net Income – the bank’s profit after all expenses and taxes.
• Shareholders’ Equity – the bank’s total assets minus total liabilities (the capital invested by shareholders plus retained earnings).

Worked Example

Using the default values from the calculator:

• Total Revenue = $1,000 million
• Operating Expenses = $600 million
• Net Income = $120 million
• Shareholders’ Equity = $800 million

First, calculate the efficiency ratio:

Efficiency Ratio = (600 / 1000) × 100 = 60%

Next, calculate ROE:

ROE = (120 / 800) × 100 = 15%

So, the bank has an efficiency ratio of 60% and an ROE of 15%. These are the headline numbers you would see in the calculator output.

What the Efficiency Ratio Tells You

The efficiency ratio is essentially a cost-to-income ratio. A lower efficiency ratio means the bank is spending less to earn each dollar of revenue. For example, a ratio of 50% means the bank spends 50 cents for every dollar it earns. A ratio of 70% means it spends 70 cents.

Generally, a ratio below 50% is considered excellent, 50-60% is good, 60-70% is average, and above 70% may signal inefficiency. However, these benchmarks vary by bank type and business model. Online banks often have lower ratios than traditional branch-based banks because they don’t maintain physical branches.

For you as a customer, a lower efficiency ratio can translate to better interest rates on savings, lower fees, and more competitive loan rates, because the bank is not wasting money on overhead. Conversely, a high efficiency ratio might mean the bank is passing its high costs onto customers through fees and low deposit rates.

What ROE Tells You

ROE shows how much profit a bank generates with the money shareholders have invested. A higher ROE indicates the bank is using its capital efficiently to generate returns. For banks, a ROE of 10-15% is typical, while top performers may exceed 20%.

However, a very high ROE can also be a red flag. It might indicate that the bank is taking on excessive risk or is undercapitalized (too little equity relative to its assets). During the 2008 financial crisis, some banks with high ROEs collapsed because they were highly leveraged. So, ROE should be viewed alongside other metrics like capital adequacy.

For customers, a healthy ROE suggests the bank is stable and likely to remain solvent, which is important for the safety of your deposits. It also indicates the bank is profitable enough to invest in technology and services that benefit you.

How to Use These Ratios When Choosing a Bank

When comparing banks, you can use these ratios as one part of your evaluation. Here are practical steps:

• Find the bank’s annual report or investor relations page – these ratios are usually disclosed in the management discussion or financial highlights.
• Compare the efficiency ratio and ROE to other banks of similar size and business model (e.g., compare online banks to online banks, community banks to community banks).
• Look at trends over 3-5 years – a steadily improving efficiency ratio is a positive sign.
• Combine these metrics with your own needs: check interest rates, fees, branch access, and customer service quality.
• Remember that a bank with a very high ROE might be riskier – check its capital ratio (Tier 1 capital ratio) to ensure it’s well-capitalized.

Common Mistakes and Misconceptions

One common mistake is comparing efficiency ratios across different types of banks without considering their business models. A credit union might have a higher efficiency ratio than a large national bank, but that doesn’t necessarily mean it’s worse – credit unions return profits to members rather than shareholders, so their cost structures differ.

Another misconception is that a lower efficiency ratio is always better. In some cases, a bank might cut spending on compliance, cybersecurity, or customer service to lower its ratio, which could be a long-term risk. Similarly, a very high ROE might be due to aggressive accounting or excessive leverage – not genuine operational efficiency.

Also, note that these ratios are historical – they reflect past performance, not future prospects. A bank with an excellent ratio today could face challenges tomorrow due to economic downturns, regulatory changes, or new competition.

Limitations of These Ratios

Neither ratio tells the whole story. The efficiency ratio ignores risk – a bank can have low costs because it takes on risky loans or investments. ROE can be manipulated through share buybacks (which reduce equity and inflate ROE) or by taking on more debt. Both ratios are also affected by accounting policies, which can vary between banks.

For a complete picture, you should also look at:

• Net interest margin – how much the bank earns on loans vs. pays on deposits.
• Non-performing loan ratio – the share of loans that are not being repaid.
• Capital adequacy ratio – the bank’s capital buffer against losses.
• Return on assets (ROA) – measures profitability relative to total assets.

Frequently Asked Questions

What is a good efficiency ratio for a bank?

A ratio below 50% is generally considered excellent, 50-60% is good, and above 70% may indicate inefficiency. However, benchmarks vary by bank type – online banks often have lower ratios than traditional banks due to lower overhead.

What is a good ROE for a bank?

A ROE of 10-15% is typical for a healthy bank. Top performers may exceed 20%, but very high ROE can signal excessive risk-taking or undercapitalization, so it should be evaluated alongside other risk metrics.

How do I find a bank’s efficiency ratio and ROE?

These ratios are usually disclosed in a bank’s annual report, investor presentations, or on financial data websites like Morningstar or Yahoo Finance. Look for the ‘Management Discussion’ or ‘Financial Highlights’ section.

Can a bank have a low efficiency ratio but be unsafe?

Yes. A low efficiency ratio might be achieved by cutting costs on compliance, cybersecurity, or loan underwriting, which could increase risk. It’s important to also check the bank’s capital adequacy and non-performing loan ratios.

Do these ratios affect my deposit rates?

Yes, indirectly. Banks with lower efficiency ratios have lower operating costs, which can allow them to offer higher interest rates on savings accounts and lower fees. However, many other factors like competition and monetary policy also influence deposit rates.

Are credit unions’ ratios comparable to banks’?

Not directly. Credit unions are non-profits that return earnings to members, so their cost structures and accounting differ. Compare credit unions to other credit unions, and banks to banks, for a fair comparison.

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in t | Total Revenue | $ million | 1000 | 0
in e | Operating Expenses | $ million | 600 | 0
in n | Net Income | $ million | 120 | 0
in s | Shareholders' Equity | $ million | 800 | 0
out er | Efficiency Ratio | % | (e / t) * 100 | 1
out roe | Return on Equity | % | (n / s) * 100 | 1