Financial ratios are essential tools for evaluating a company's performance, valuation, and financial health. Each ratio serves a specific purpose and is most effective when applied in the right context. This guide breaks down key metrics across valuation, profitability, return, and risk, helping you interpret them accurately based on industry and business model.
So, let’s break it down into categories:
I. Valuation Ratios
What are you paying for? Are you overpaying, underpaying, or just playing blind?
1. PE Ratio (Price to Earnings)
Formula:
PE = Market Price per Share / Earnings per Share (EPS)
The Price to Earnings (PE) ratio tells you how much the market is willing to pay for each rupee of a company’s earnings. It’s calculated as the market price per share divided by the earnings per share (EPS). This ratio is most useful when analyzing consistently profitable companies in relatively stable sectors like FMCG, automobiles, IT, or pharmaceuticals. A high PE typically suggests that investors expect strong future growth or that the stock is overhyped. A low PE might indicate undervaluation, or it could be a sign that the company is facing challenges.
For example, if a stock trades at ₹200 and its EPS is ₹10, the PE comes out to 20×, meaning you're paying ₹20 for every ₹1 the company earns. Used correctly, the PE ratio helps assess whether a stock is overpriced, underpriced, or fairly valued, but always compare it within the same sector for context.
2. PB Ratio (Price to Book)
Formula:
PB = Market Price per Share / Book Value per Share
The Price to Book (PB) ratio compares a company's market price to its book value per share, offering a snapshot of how the market values its net assets. It's particularly relevant for asset-heavy businesses like banks, NBFCs, insurance companies, or capital-intensive firms where tangible assets dominate the balance sheet. A PB ratio below 1 suggests the market believes the company’s assets may be overvalued or that future returns look weak. On the other hand, a PB above 1 indicates that investors are willing to pay a premium, often for intangibles like brand strength, profitability, or expected growth. This ratio is most meaningful when used within sectors where book value reflects economic worth.
3. PS Ratio (Price to Sales)
Formula:
PS = Market Cap / Revenue or Stock Price / Sales per Share
The Price to Sales (P/S) ratio measures how much investors are willing to pay for each rupee of a company’s revenue. It is calculated as the market capitalization divided by total revenue or the stock price divided by sales per share. This ratio is especially useful when analyzing early-stage or high-growth companies such as startups, tech firms, or e-commerce players that may not yet be profitable but are showing strong revenue growth. Since earnings can be negative or volatile in such cases, the PS ratio helps assess whether the stock is reasonably valued based on its top line. While a high P/S may suggest optimism about future scalability and profitability, it also comes with risk if that growth doesn’t materialize.
4. EV/EBITDA (Enterprise Value to EBITDA)
Formula:
EV/EBITDA = (Market Cap + Debt – Cash) / EBITDA
The EV/EBITDA ratio provides a clearer picture of a company’s valuation by focusing on its operating performance, stripping out the effects of capital structure, taxes, and non-cash expenses like depreciation.
It is calculated by dividing Enterprise Value (market cap + debt – cash) by EBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization). This makes it especially useful when comparing companies with different levels of debt or when analyzing potential acquisition targets. It’s widely used in capital-intensive sectors like telecom, steel, cement, and utilities, where depreciation and financing costs can distort earnings. A lower EV/EBITDA may indicate a more attractive valuation, but as always, context within the industry is key.
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II. Profitability ratios
How well is the business converting resources into profit?
5. Gross Profit Margin
Formula:
(Revenue – Cost of Goods Sold) / Revenue
Gross Profit Margin shows how much of each rupee of revenue is left after covering the direct costs of producing goods or services. It’s calculated as (Revenue – Cost of Goods Sold) divided by Revenue. This ratio is particularly useful when comparing companies that sell similar products, as it reflects core product profitability before overheads, taxes, or interest. A high gross margin often points to strong pricing power, brand strength, or an efficient supply chain. A low margin, on the other hand, could signal intense competition, rising input costs, or poor cost control. It's a frontline metric for evaluating how well a company manages its production costs.
6. Operating Margin
Formula:
Operating Profit / Revenue
Operating Margin measures how much profit a company makes from its core operations, before interest and taxes, as a percentage of revenue. It’s calculated by dividing operating profit by revenue. This ratio strips out non-operating income and one-time expenses, offering a clearer view of the company’s day-to-day efficiency. It's especially useful when comparing companies in the same industry with similar cost structures. A higher operating margin suggests better control over fixed and variable costs, while a declining margin may point to rising operational inefficiencies or increased competitive pressure. It’s a stronger indicator of business health than net profit margin when analyzing core performance.
7. Net Profit Margin
Formula:
Net Profit / Revenue
Net Profit Margin reveals how much of a company’s revenue turns into actual profit after accounting for all expenses, taxes, interest, depreciation, and other costs. It’s calculated by dividing net profit by revenue and is one of the most widely tracked indicators of overall profitability. This ratio gives a bottom-line view of financial performance and is best used when comparing companies within the same sector, as margins vary significantly across industries. For instance, software and tech firms often enjoy high net margins due to low variable costs, while sectors like aviation or retail typically operate on thinner margins due to high operating expenses and pricing pressure.
III. Return Ratios
How effectively is the company using capital to generate profit?
8. ROE (Return on Equity)
Formula:
ROE = Net Profit / Shareholders’ Equity
Return on Equity (ROE) measures how efficiently a company is generating profit using shareholders’ capital. It’s calculated as net profit divided by shareholders’ equity. A consistently high ROE, generally above 15%, indicates strong capital efficiency and effective management. However, ROE should always be compared within the same industry, as capital requirements differ widely. For example, banks typically have high ROEs due to leverage, while FMCG companies may show lower but stable returns. ROE is a go-to metric for equity investors to assess whether the company is rewarding its owners with adequate returns.
9. ROCE (Return on Capital Employed)
Formula:
ROCE = EBIT / (Total Assets – Current Liabilities)
Return on Capital Employed (ROCE) gauges how efficiently a company is using its total capital (both equity and debt) to generate operating profit. It’s calculated as EBIT (Earnings Before Interest and Tax) divided by capital employed (total assets minus current liabilities). ROCE becomes especially relevant when debt plays a significant role in the capital structure, making it a better measure than ROE for evaluating businesses with heavy investments. It’s best used for capital-intensive industries like manufacturing, infrastructure, power, and capital goods, where large upfront investments must generate strong, sustained returns. A higher ROCE indicates efficient use of capital and better long-term value creation
10. ROA (Return on Assets)
Formula:
ROA = Net Profit / Total Assets
Return on Assets (ROA) measures how efficiently a company is using its total assets to generate net profit. It’s calculated by dividing net profit by total assets. ROA is a useful indicator of overall asset productivity, how much profit a company can squeeze out of every rupee it owns. This ratio tends to be lower in asset-heavy industries like utilities, manufacturing, or infrastructure due to large fixed investments. In contrast, tech and service companies with leaner balance sheets usually post higher ROA. It’s best used when comparing companies with similar asset profiles.
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IV. Efficiency & Leverage Ratios
How well is the company using resources? Is it overleveraged? Struggling with working capital?
11. Asset Turnover Ratio
Formula:
Revenue / Total Assets
The Asset Turnover Ratio measures how efficiently a company uses its total assets to generate revenue. It’s calculated by dividing revenue by total assets. A higher ratio indicates better utilization of assets in driving sales, which is typically seen in asset-light businesses like retail or consumer goods. A lower ratio may suggest that the company’s assets are under-utilized or inflated, common in capital-heavy sectors or businesses with declining demand. This metric is particularly useful when comparing operational efficiency between companies with similar asset intensity.
12. Inventory Turnover Ratio
Formula:
COGS / Average Inventory
The Inventory Turnover Ratio shows how many times a company sells and replaces its inventory over a period. It’s calculated by dividing the Cost of Goods Sold (COGS) by average inventory. This ratio is key for retail, manufacturing, and any business that holds physical stock. A high inventory turnover indicates efficient inventory management and strong sales, but if it’s too high, it could point to insufficient stock levels and missed demand. On the flip side, a low turnover suggests overstocking, weak sales, or poor demand forecasting. It’s a useful tool to evaluate how well a company balances stock levels with sales velocity.
13. Interest Coverage Ratio
Formula:
EBIT / Interest Expense
The Interest Coverage Ratio measures a company’s ability to meet its interest obligations from operating profits. It’s calculated by dividing EBIT (Earnings Before Interest and Tax) by interest expense. This ratio is critical for evaluating the financial stability of companies with significant debt, especially in sectors like infrastructure, power, or real estate. A ratio below 1.5× is a warning sign; it suggests the company may struggle to service its debt from current earnings. The higher the ratio, the more comfortably a business can handle its interest payments, making it a key metric for assessing credit risk.
14. Debt-to-Equity Ratio
Formula:
Total Debt / Shareholders’ Equity
The Debt-to-Equity Ratio shows how much debt a company is using to finance its operations relative to shareholder equity. It’s calculated by dividing total debt by shareholders’ equity. This ratio reflects financial leverage and is a key indicator of balance sheet risk. A ratio below 1 is generally considered healthy, suggesting the company isn’t overly reliant on borrowed money. However, a ratio above 2 may raise red flags, unless the company operates in a capital-intensive sector like utilities or infrastructure, where steady cash flows can support higher leverage. It’s best used to assess financial risk and capital structure strength.
A ratio below 1 is generally considered healthy, suggesting the company isn’t overly reliant on borrowed money. However, a D/E above 1.5 in non-capital-intensive sectors like IT or FMCG can be risky. In sectors like infrastructure or power, where stable cash flows support higher leverage, a higher ratio may still be manageable, but anything above 2 should be looked at more carefully.
15. Current Ratio
Formula:
Current Assets / Current Liabilities
The Current Ratio measures a company’s ability to meet its short-term obligations using its short-term assets. It’s calculated by dividing current assets by current liabilities. A ratio above 1.5 typically indicates healthy liquidity and a comfortable buffer to handle day-to-day expenses. But if it’s too high, it could mean the company is sitting on idle cash or overstocking inventory. On the flip side, a ratio below 1 may point to a working capital crunch, where the company might struggle to pay off its dues. This ratio is especially relevant for businesses with seasonal sales cycles or tight cash flow management needs.
So, When do you use what?
| Ratio Type | Best Used For | Industries |
|---|---|---|
| PE, EV/EBITDA, PB, PS | Valuing stocks | FMCG, tech, banks, infra |
| ROE, ROCE, ROA | Assessing returns | All, but especially capital-heavy industries |
| Margins (Gross, Operating, Net) | Understanding profit structure | Retail, manufacturing |
| Leverage & Liquidity | Risk analysis | Infra, real estate, finance |
| Efficiency | Operational effectiveness | Auto, consumer goods |
A well-rounded analysis requires more than one ratio. Interpreting them in context (by sector, stage of growth, and capital structure) offers a clearer view of a company’s fundamentals. Used correctly, these metrics support informed, objective investment decisions.
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