ROE Calculator

How to use this calculator

The ROE calculator gives you two modes: Simple ROE and DuPont Analysis. Both start with the same two core inputs, but DuPont asks for two more to break the number apart.

Net Income is the bottom-line profit from the income statement, after taxes and interest. Use the annual figure. Don’t use EBITDA or operating income here. It has to be net income.

Shareholders’ Equity is total assets minus total liabilities, pulled from the balance sheet. For the most accurate result, use the average of beginning and ending equity for the period (add both figures and divide by two). Many people use just the ending balance, which is fine for a quick check but can distort the number if equity changed a lot during the year.

Revenue (DuPont only) is total sales for the year, before any deductions.

Total Assets (DuPont only) is everything on the balance sheet: cash, inventory, equipment, intangibles, the works.

The industry preset buttons load representative values so you can see what typical numbers look like for tech, banking, retail, manufacturing, and utility companies before you enter your own.

What ROE actually is

Return on Equity measures how much profit a company squeezes out of the money its shareholders have put in. It answers one question: “How hard is management working shareholder capital?”

ROE = 15% means the company earned $15 for every $100 of equity on the books. That's the whole idea.

It’s one of the most-watched metrics in fundamental analysis because it reflects both operational performance and the financing decisions management has made. Two companies in the same industry with the same ROE can look very different under the hood, which is exactly why DuPont analysis exists.

The formula and the calculation

The basic formula is straightforward:

The DuPont decomposition splits that single ratio into three distinct drivers:

Where:

• Net Profit Margin = Net Income / Revenue (how much profit per dollar of sales)
• Asset Turnover = Revenue / Total Assets (how many dollars of sales per dollar of assets)
• Equity Multiplier = Total Assets / Shareholders’ Equity (how much assets are funded by equity vs. debt)

The DuPont result is the same number you’d get from the simple formula. The value is in seeing which of the three drivers is doing the heavy lifting, and whether that’s sustainable.

Why DuPont matters: three paths to the same ROE

Two companies can report identical ROE numbers while running completely different businesses. DuPont shows you the difference.

Consider a luxury goods brand vs. a supermarket chain, both posting 20% ROE:

Same ROE, completely different risk profiles. The luxury brand earns its return through fat margins and conservative financing. The supermarket earns it by moving product at enormous volume with considerable leverage. If the supermarket’s sales slow down, that leverage becomes a problem. The luxury brand has more cushion.

This is the core insight of DuPont analysis. Before accepting a high ROE at face value, check which lever is driving it.

When ROE misleads you: the share buyback effect

ROE can spike to absurd levels without any improvement in business performance. The culprit is share buybacks.

When a company buys back its own shares, shareholders’ equity on the balance sheet falls. The same net income spread across a smaller equity base produces a higher ROE. If the buybacks are large enough, equity can turn negative, at which point ROE becomes mathematically nonsensical.

Apple is the textbook example. The company has spent hundreds of billions on buybacks over the past decade. By 2023, shareholders’ equity had compressed to around $62 billion despite the company being worth over $2 trillion. The resulting ROE was north of 150%, not because Apple’s operations became dramatically more efficient, but because the denominator got crushed.

The flip side is companies with negative equity. When accumulated losses or aggressive buybacks push shareholders’ equity below zero, ROE produces a negative percentage from a positive net income. A company earning $10M with -$50M in equity shows an ROE of -20%, which is actively misleading. In these cases, ROE is not a useful metric and you should substitute Return on Assets (ROA) or Return on Invested Capital (ROIC) instead.

ROA = Net Income / Total Assets strips out the capital structure entirely. It tells you how effectively the company is using all its assets, regardless of how they’re financed. A company with inflated ROE due to leverage will have a much more modest ROA, which is the honest measure of operational performance.

For most analysis purposes, use ROE alongside ROA. If ROE is high and ROA is also solid (say, 10%+), the performance is genuine. If ROE is high but ROA is modest (3-5%), the ROE is mostly a capital structure story, not an operating excellence story.

ROE benchmarks by industry

ROE varies a lot by sector. What counts as “good” depends entirely on context.

As a rough starting point, an ROE consistently above 15% over several years signals a well-run company. Warren Buffett has often cited 15% as a floor when screening for quality businesses. But banking and utilities operate in regulated environments with mandated capital ratios, so their lower ROE figures are normal, not a red flag.

Real-world examples

Example 1: Apple (tech, high-margin model)

Apple’s 2023 financials: Net Income $97B, Revenue $383B, Total Assets $352B, Shareholders’ Equity $62B.

Example 2: A regional bank

Community Bank Corp reports: Net Income $18M, Revenue $95M, Total Assets $480M, Shareholders’ Equity $150M.

Common mistakes

Using ending equity instead of average equity. If a company issued shares or repurchased a lot of stock during the year, the year-end equity figure can differ significantly from what was actually deployed all year. Average the start and end balances.

Treating high ROE from high leverage as unconditionally good. An equity multiplier of 8× or 10× means the company is running on mostly debt. Any earnings shortfall hits equity holders hard. Check the debt-to-equity ratio alongside ROE.

Ignoring the DuPont drivers. An ROE of 25% could mean the company has excellent margins, or it could mean it’s barely profitable but has taken on mountains of debt. They’re very different situations. Always decompose.

Comparing across industries without adjustment. A utility with 10% ROE isn’t worse than a software firm with 30% ROE. It’s just in a different capital structure and regulatory environment. Use sector benchmarks, not a single universal number.

Not checking for negative equity. If a company has negative shareholders’ equity (accumulated losses or massive buybacks), ROE becomes mathematically meaningless. A “200% ROE” on negative equity is not a good sign.

Looking at one year in isolation. A single year’s ROE tells you little. What matters is whether ROE is stable or improving over 5-10 years, and whether the company earns consistently above its cost of equity.

The bottom line

ROE is a compact, powerful measure of how well management is using shareholder capital. A 15%+ ROE sustained over many years is a reasonable quality filter. But the number alone only tells half the story. Running the DuPont decomposition every time you look at ROE reveals whether the return comes from genuine operating performance, efficient asset use, or financial engineering through debt. Two companies with identical ROE can be in very different financial positions. The DuPont framework is how you tell them apart. And when ROE looks suspiciously high, always check the equity multiplier and compare against ROA before drawing any conclusions about quality. A 50% ROE built on 10× leverage is a very different story from one built on 25% net margins. The number is the same. The business quality is not.