8 Financial Ratios to Check Before Buying Any Stock in India

India now has more than 21.6 crore demat accounts (as of December 2025, per depository data from NSDL and CDSL), and a record number of them were opened by first-time investors. Yet most new buyers still pick a stock the same way they pick a movie: a friend recommended it, the chart was going up, or the name felt familiar. The problem is that price tells you what a stock costs, not what it is worth. That gap is exactly what financial ratios are built to close. This guide walks through the 8 financial ratios every investor should check before buying any stock, grouped by the four plain questions they actually answer: Is it cheap? Is it profitable? Is it safe? Is it efficient?

Source: NSDL and CDSL depository data; Nifty valuation trackers, June 2026.

Why financial ratios beat a gut feeling

A share price on its own is a meaningless number. Is a stock at ₹2,000 expensive and one at ₹50 cheap? You cannot say, because price depends on how many shares a company has split its ownership into. A ratio fixes this by putting price in context, dividing it against earnings, book value, or cash flows, so two very different companies become comparable on the same scale.

Financial ratios take the raw figures from a company's profit and loss statement, balance sheet, and cash flow statement and turn them into a language you can compare. One ratio tells you whether you are overpaying. Another tells you whether the business actually makes money for its owners. A third warns you if the company is drowning in debt. Read together, they build a quick, honest profile of a business before you commit a single rupee.

Ratios do not predict the future, but they expose the present with a clarity that price and headlines never will. They are the difference between investing and guessing. The numbers they use all come straight from the annual report, which is why learning to read that document pays off directly here, as we covered in our guide on how to read an annual report step by step. If you want this foundation built properly rather than pieced together from scattered videos, a structured fundamental analysis course compresses years of trial and error into a few focused weeks.

The four questions financial ratios answer

There are dozens of ratios, and beginners often drown trying to memorise all of them. You do not need to. Almost every ratio worth knowing exists to answer one of four questions about a business. Group them that way and the whole subject becomes simple to hold in your head.

Think of it as a checklist you run in order. First you ask whether the stock is reasonably priced. Then whether the underlying business is genuinely profitable. Then whether it can survive a bad year without collapsing under debt. Finally whether it uses its assets and working capital efficiently. The table below maps the 8 core financial ratios onto those four questions.

The 8 financial ratios, one by one

Here is each ratio with its formula and, just as important, what a healthy reading tends to look like. Treat the benchmarks as starting points, not laws, because as you will see later, the right number depends heavily on the sector.

Question 1 — Is it cheap? (P/E and P/B)

Price-to-Earnings (P/E) = Share Price ÷ Earnings Per Share. This is the most quoted ratio in the market. A P/E of 20 means you are paying ₹20 for every ₹1 of annual profit the company earns. A lower P/E can signal a bargain or a business the market has lost faith in; a high P/E signals either strong growth expectations or plain overpricing. Always compare a company's P/E with its own history and its industry peers, never in isolation.

Price-to-Book (P/B) = Share Price ÷ Book Value Per Share. Book value is what would theoretically be left for shareholders if the company sold its assets and paid its debts. A P/B near 1 means you are paying roughly what the company is worth on paper. It is especially useful for banks and finance companies, where assets are largely financial and book value is meaningful.

Question 2 — Is it profitable? (ROE and Net Margin)

Return on Equity (ROE) = Net Profit ÷ Shareholders' Equity. ROE answers the owner's real question: for every rupee of my money in this business, how much profit does it generate a year? A consistent ROE above roughly 15% is generally considered strong, but be careful, because heavy borrowing can inflate ROE artificially, which is why you always read it alongside the debt ratios below.

Net Profit Margin = Net Profit ÷ Revenue. This shows how much of every rupee of sales survives all the way to the bottom line after costs, interest, and tax. A thin margin is not automatically bad, supermarkets live on thin margins and huge volumes, but a margin that is shrinking year after year is a genuine warning sign about pricing power or rising costs.

Question 3 — Is it safe? (Debt-to-Equity and Interest Coverage)

Debt-to-Equity (D/E) = Total Debt ÷ Shareholders' Equity. This measures how much the company runs on borrowed money versus owners' money. A D/E below 1 is generally comfortable for most manufacturing and service companies; a very high figure means a bad year could leave the company struggling to repay lenders. Banks and infrastructure firms naturally carry higher debt, so judge them against their own kind.

Interest Coverage = EBIT ÷ Interest Expense. If debt is the risk, interest coverage tells you how easily the company pays the interest on it. A ratio of 5 means operating profit covers the interest bill five times over, which is comfortable. A ratio slipping toward 1 or 2 is a red flag that the debt burden is becoming dangerous.

Question 4 — Is it efficient? (Current Ratio and Inventory Turnover)

Current Ratio = Current Assets ÷ Current Liabilities. This checks whether the company can meet its short-term dues over the next year. A current ratio around 1.5 to 2 usually signals healthy liquidity; far below 1 suggests a possible cash crunch, while an unusually high figure can mean idle cash that is not being put to work.

Inventory Turnover = Cost of Goods Sold ÷ Average Inventory. This shows how many times a year the company sells and replaces its stock. A higher turnover usually means goods are moving briskly rather than gathering dust in a warehouse. We break this down with examples in our note on what a good inventory turnover ratio looks like. It matters most for retailers and manufacturers and far less for a software firm that holds no physical stock.

Why a good ratio depends on the sector

Here is the single most common mistake with financial ratios: judging every company against one universal number. A P/E of 30 looks expensive if you have only ever looked at banks, and perfectly ordinary if you follow pharmaceutical or fast-moving consumer goods companies. The market pays up for sectors it believes have steady, growing earnings, and pays little for cyclical sectors whose profits swing with commodity prices.

The chart below shows how far P/E ratios spread across Indian sector indices. Public-sector banks trade in single digits while pharma and realty trade near forty, a gap of nearly five times. The same ratio that screams overvalued in one sector is a normal price of admission in another.

The practical rule is simple. Always compare a company's ratio against two references: its own history over the last five years, and the median of its direct peers. A stock cheaper than both, with sound profitability and safe debt, is far more interesting than one that merely looks cheap against an unrelated benchmark.

Five mistakes investors make with ratios

Ratios are powerful, but they mislead the moment you use them lazily. These are the traps that catch new investors most often.

• Judging one ratio in isolation. A low P/E paired with falling profits and rising debt is a value trap, not a bargain. Ratios only tell the truth in combination.
• Ignoring the sector. Comparing an IT firm's P/E with a public-sector bank's is meaningless. Peers first, always.
• Trusting a single year. One good year can be luck or an accounting quirk. Look for a consistent trend across at least three to five years.
• Forgetting debt when reading ROE. A dazzling ROE built on heavy borrowing is fragile. Cross-check it against debt-to-equity every time.
• Skipping the cash flow. Profits can be dressed up on paper; cash is harder to fake. A profitable company that never generates cash deserves suspicion.

If you internalise just these five, you will already avoid the errors that cost most retail investors dearly. Ratios reward patience and punish shortcuts. For the wider picture of how these numbers fit into company analysis, our primer on what fundamental analysis is and how to do it ties the pieces together.

How to use financial ratios before your next buy

Knowledge only helps if it becomes a habit. Turn these 8 financial ratios into a short, repeatable screen you run on every stock before it enters your portfolio. It takes ten minutes once you know where each number lives in the annual report.

Run the four checks in that order and stop the moment a company fails badly on any one of them. A stock only earns a place on your watchlist when it clears all four. That discipline, applied consistently, is what separates investing from gambling.

Frequently Asked Questions

Which financial ratio is most important before buying a stock?

No single ratio is enough on its own, but the P/E ratio is the usual starting point because it links price to profit. Pair it immediately with Return on Equity to judge quality and Debt-to-Equity to judge safety. A stock that looks good on all three is far more reliable than one that shines on any single number.

What is a good P/E ratio for Indian stocks?

There is no universal good P/E. The Nifty 50 traded near 20.8 in June 2026, but sector indices ranged from around 8 for public-sector banks to nearly 40 for pharma and realty. Judge a company's P/E against its own five-year history and its direct sector peers rather than one fixed number.

Can I rely on financial ratios alone to pick stocks?

Ratios are a powerful filter but not the whole job. They summarise the past and present, not the future. Combine them with an understanding of the business model, management quality, industry outlook, and the cash flow statement. Ratios tell you where to look closer; they do not replace judgement.

Where do I find the numbers to calculate these ratios?

Every input comes from a company's audited financial statements in its annual report: the profit and loss statement, the balance sheet, and the cash flow statement. Many Indian financial portals also display ready-calculated ratios, but knowing the formulas lets you check their work and spot when a figure has been distorted.

How many years of ratios should I check?

Look at three to five years wherever possible. A single year can be flattered by a one-off gain or a temporary dip. A trend across several years reveals whether profitability, debt, and efficiency are genuinely improving or quietly deteriorating, which is exactly what a careful investor wants to know.

Disclaimer: This article is for educational purposes only and does not constitute investment advice. Markets carry risk — please do your own research or consult a qualified financial professional before investing. NIFM provides training and exam preparation; certification exams conducted by regulatory or professional bodies are administered by those bodies independently.