Profitability Ratios

How profitability ratios work

Profitability ratios fall into two families. Margin ratios (gross, operating, net, EBITDA) show what share of every revenue dollar survives to become profit at different stages of the income statement — gross margin after direct production costs, operating margin after running the business, net margin after everything including interest and tax. Return ratios (ROA, ROE, ROIC) instead measure profit against the capital used to generate it, answering a different question: how efficiently is the company deploying its assets, equity, or total invested capital?

For example, a company with $500,000 in revenue and $400,000 in cost of goods sold has a gross margin of ($500,000 − $400,000) / $500,000 = 20%. If its net income for the same period is $30,000, net margin is $30,000 / $500,000 = 6% — the gap between the two shows how much operating expenses, interest, and tax ate into that initial 20% gross margin. For a fuller decomposition of what's driving ROE specifically — margin, asset efficiency, and leverage — see the DuPont Analysis calculator, and for how efficiently assets and working capital are being used, see the Efficiency Ratios calculator.

Gross Margin

Gross Margin = (Revenue − COGS) ÷ Revenue

Gross margin measures the profitability of a company's core product or service before any overhead, sales, marketing, or administrative costs. Revenue is total sales for the period — found on the top line of the income statement. Cost of Goods Sold (COGS) covers the direct costs of producing what was sold: raw materials, direct labour, and manufacturing overhead. It does not include rent, executive salaries, marketing, or R&D — those appear further down the income statement as operating expenses.

Benchmarks: Software and SaaS companies typically run 60–80%+ gross margins because marginal delivery cost is near zero. Retail and grocery operate on 15–30%. Hardware and manufacturing: 30–50%. Gross margin below 20% in a non-retail business warrants scrutiny. Trends matter as much as the level — declining gross margin signals pricing pressure or rising input costs.

Operating Margin

Operating Margin = EBIT ÷ Revenue

EBIT (Earnings Before Interest and Taxes) — also called operating profit — is what remains after subtracting both COGS and all operating expenses (salaries, rent, marketing, depreciation) from revenue, but before deducting interest payments on debt or paying income tax. It shows the profitability of the business operations independent of how the company is financed or taxed.

Where to find EBIT: The income statement — typically labelled "operating profit" or "operating income." If unlabelled, calculate it as: Revenue − COGS − Operating Expenses. Benchmarks: 15%+ is generally healthy; 5–10% is modest; below 5% leaves little margin for error. Operating margin above gross margin is impossible — if you see this, check your inputs.

Net Margin

Net Margin = Net Income ÷ Revenue

Net income (also called net profit or the "bottom line") is what remains after every expense: COGS, operating costs, depreciation, interest on debt, and income taxes. It appears at the bottom of the income statement. Net margin is the most complete measure of profitability, but it can be distorted by one-off items (asset sales, tax credits, write-downs) — which is why analysts often also look at EBITDA margin for an underlying-business view.

Benchmarks: 10%+ is generally strong. Many large profitable companies run 15–25%. Airlines, grocery, and distribution businesses often operate below 5%. A company with a high gross margin but thin net margin is spending heavily on operating expenses — drill into the income statement to find where margin is being consumed.

EBITDA Margin

EBITDA Margin = EBITDA ÷ Revenue

EBITDA (Earnings Before Interest, Tax, Depreciation and Amortisation) strips out non-cash charges (depreciation, amortisation) and financing costs (interest, tax) to give a view of raw operating cash generation. It's widely used for comparing companies across different tax jurisdictions, capital structures, and accounting choices around how quickly they depreciate assets.

How to calculate EBITDA: Start with EBIT and add back depreciation and amortisation (D&A) — both are found in the cash flow statement or disclosed in income statement notes. Alternatively: Net Income + Interest + Taxes + D&A. Benchmarks: 20%+ is strong for most industries; subscription software companies often target 20–40%; capital-intensive businesses (telecoms, utilities) may run 30–50% EBITDA margins but thin net margins due to high depreciation.

ROA — Return on Assets

ROA = Net Income ÷ Total Assets

ROA measures how efficiently a company uses its entire asset base — everything it owns — to generate profit. Total assets is the sum of current assets (cash, receivables, inventory) and non-current assets (property, plant, equipment, intangibles) from the balance sheet. Using average assets (start + end of period ÷ 2) is more accurate when asset levels change significantly during the year.

Benchmarks: 5%+ is generally good; 10%+ is strong. Asset-heavy industries (manufacturing, real estate, utilities) naturally run lower ROA than asset-light businesses (software, consulting). Compare ROA within an industry, not across sectors. A rising ROA trend indicates improving operational efficiency.

ROE — Return on Equity

ROE = Net Income ÷ Shareholders' Equity

ROE measures the return generated on the money shareholders have invested in the business. Shareholders' equity (also called book value or net assets) is total assets minus total liabilities — found on the balance sheet. A high ROE can reflect genuine profitability, but it can also be inflated by leverage: loading a company with debt shrinks the equity base and mechanically increases ROE even without improving the underlying business. Use the DuPont Analysis calculator to separate the effects of margin, efficiency, and leverage on ROE.

Benchmarks: 15–20% is generally considered strong for a mature business. Warren Buffett has cited consistent ROE above 15% as a hallmark of a durable competitive advantage. An ROE much higher than peers without obvious explanation usually means high financial leverage — check the debt-to-equity ratio.

ROIC — Return on Invested Capital

ROIC = NOPAT ÷ Invested Capital

ROIC is widely regarded as the most rigorous return metric because it measures the return on all capital invested in the business — both debt and equity — stripped of tax distortions. NOPAT (Net Operating Profit After Tax) = EBIT × (1 − tax rate). It removes interest expense so the metric is independent of financing decisions. Invested Capital = Total Equity + Interest-bearing Debt (short and long term), or equivalently: Total Assets − Non-interest-bearing Current Liabilities − Excess Cash.

The critical comparison is ROIC vs WACC: if ROIC > WACC, the business creates economic value; if ROIC < WACC, it destroys value even while reporting positive accounting profit. Use the WACC calculator to find your cost of capital. Benchmarks: ROIC of 10–15% is solid; 15–25% signals a strong competitive moat; sustained ROIC above 25% is exceptional. Capital-intensive industries (utilities, real estate) typically run 5–10%.

EPS — Earnings Per Share

EPS = (Net Income − Preferred Dividends) ÷ Shares Outstanding

EPS is the portion of a company's profit allocated to each ordinary share. Preferred dividends are deducted first because preferred shareholders have a prior claim on earnings before common shareholders. Shares outstanding is the current count of all issued ordinary shares, found in the equity section of the balance sheet or on financial data sites. Diluted EPS also counts potential shares from options and convertibles — always check whether a reported EPS figure is basic or diluted.

EPS on its own is less meaningful than its trend and its relationship to share price. Divide the current share price by EPS to get the P/E ratio. EPS growth — sustained double-digit annual growth — is one of the most commonly cited signals of business quality. Use the Valuation Multiples calculator to calculate P/E and other multiples from the same earnings figures.