Profitability ratios answer one core question in different ways: how well is this business using what it has? Return on equity, or ROE, is the sharpest version of that question. It asks specifically: for every rupee shareholders have put into this company, how much profit did the business generate?
The formula is net profit divided by shareholders' equity, expressed as a percentage. Shareholders' equity is the book value of the company: total assets minus total liabilities. Everything that belongs to shareholders after debts are paid.
A company with Rs 100 crore in shareholders' equity that earns Rs 18 crore in net profit has an ROE of 18 percent. That Rs 18 crore is not revenue. It is what's left after all costs, interest payments, and taxes. Eighteen percent ROE means the business earns Rs 18 for every Rs 100 shareholders have entrusted to it, a number you can directly compare to the returns from any alternative investment.
What makes a good ROE
Context matters significantly. Capital-intensive industries like steel, infrastructure, and utilities require large asset bases to generate revenue, so their ROE tends to be structurally lower. Asset-light businesses like software services or consumer brands require far less capital, so their ROE tends to be structurally higher.
HDFC Bank has maintained ROE in the range of 16 to 18 percent for most of the last decade. For a bank, which is a highly capital-intensive and regulated business, that is genuinely impressive. Banks must hold substantial equity capital against their loan books by regulatory requirement. Generating 17 percent returns on that mandated capital base reflects consistent quality throughout the lending operation.
Asian Paints sits at a different level. Through most of the decade to FY2024, it delivered ROE consistently above 25 percent, hitting 29.8 percent in FY2024 (as of the March 2024 fiscal year end). The business requires relatively modest capital: raw materials, manufacturing, distribution. It converts those into branded products with pricing power. A sustained ROE above 25 percent in a consumer business is the kind of compounding that turns long-term investors into enthusiastic holders regardless of what the market does in any given year.
PSU banks during the NPA crisis of 2015 to 2018 tell the opposite story. Many government banks reported ROE in single digits or even negative for multiple quarters. The same equity capital that a well-run private bank uses to generate 17 percent returns was generating 4 to 6 percent or less. The comparison is stark and explains much of the valuation gap between private and government banks.
The problem with using ROE alone
ROE can be artificially elevated through financial leverage. A company that borrows heavily and deploys that debt into its business can show a high ROE even while the underlying business earns mediocre returns. The debt amplifies both profits and losses.
The DuPont decomposition breaks ROE into three components: net profit margin (how much profit per rupee of revenue), asset turnover (how much revenue per rupee of assets), and financial leverage (how many rupees of assets per rupee of equity). Each component tells a different story about how the ROE is being generated.
Two companies can have identical 18 percent ROE while one achieves it through high margins on low sales volume and the other through thin margins on enormous volume supported by significant borrowing. The first is typically more resilient. The second carries considerably more risk. Reading ROE without also checking debt levels is how investors confuse financial engineering with genuine business quality.
ROE and the price you pay
A business that earns 20 percent ROE consistently will grow its book value at roughly 20 percent per year, assuming it retains most of its earnings. That compounding of equity base is what produces long-term stock market wealth, and it is why high-ROE businesses tend to trade at premium valuations.
The logic is direct: if a company reliably earns 20 percent on whatever capital you give it, and you can put more capital in by buying its shares, you should theoretically be willing to pay a premium to get access to that return. This is why quality businesses with sustained high ROE rarely look cheap on standard valuation metrics. The market prices the future compounding before it happens.
The risk is when the high ROE fades. Competitive pressures, sector disruption, or management missteps can all erode returns on equity over time. Tracking whether a company's ROE is stable, improving, or declining is often more informative than the current absolute number.