P/E Ratio — Is the Stock Cheap or Expensive?

What is the P/E Ratio?

Imagine two tea stalls side by side. Both earn ₹1 lakh profit per year. One is selling for ₹10 lakh, the other for ₹30 lakh. Which one are you getting a better deal on? Obviously the first one — you're paying 10x earnings vs 30x earnings.

The Price-to-Earnings (P/E) ratio does exactly this comparison for stocks. It tells you how many rupees you're paying for every ₹1 of profit the company earns.

Formula: P/E Ratio = Market Price per Share ÷ EPS, where EPS = PAT ÷ Total Shares Outstanding.

Example: If Infosys trades at ₹1,800 per share and its EPS is ₹60, then P/E = 1800 ÷ 60 = 30x. You're paying ₹30 for every ₹1 of annual profit.

What the Number Actually Means

P/E Level	What It Signals
P/E of 10x	You recover your investment in ~10 years from earnings alone (if profit stays flat). Generally considered cheap, but check why it's low — potentially undervalued
P/E of 25x	Market is paying a premium, likely expecting strong future growth. Reasonable for quality businesses with 15%+ growth — fair value territory
P/E of 60x+	Market expects explosive growth. Can be justified for high-growth companies but leaves zero room for disappointment — any earnings miss means a sharp fall. Priced for perfection
Negative P/E	Company is making a loss — EPS is negative so P/E is meaningless. Never compare a loss-making company using P/E

Trailing P/E vs Forward P/E

Type	What It Means
Trailing P/E (TTM)	Based on actual earnings of the last 12 months (Trailing Twelve Months) — real, reported data with no guesswork. Most reliable for stable businesses, available directly on Screener.in and Tickertape. Use this for most analysis
Forward P/E	Based on analyst estimates of future earnings. If a company is expected to grow profits sharply, forward P/E will be lower than trailing, making the stock look "cheaper." Useful for growth stocks but based on projections that may not materialise — use with caution

Real Example: Indian IT Sector Comparison

P/E is most powerful when comparing companies in the same sector (illustrative figures):

Company	Price (₹)	EPS (₹)	P/E	Reading
TCS	3,800	120	31.7x	Premium — market leader, deserves premium
Infosys	1,800	60	30.0x	Similar quality, similar price — fair
Wipro	480	22	21.8x	Discount to peers — slower growth reflects it
HCL Tech	1,600	70	22.9x	Cheaper than TCS/Infy for similar size

Illustrative figures. Check Screener.in for live data.

Second Example: Comparing P/E Across Sectors

Now compare companies from completely different sectors — this is exactly the comparison you should never make when picking stocks, but it's useful to see why:

Company	Sector	P/E	Why It's Different
Nestle India	FMCG	70x	Strong brand, pricing power, very low capital needs — market pays a huge premium for stability and growth
TCS	IT Services	32x	Asset-light, high ROE, consistent growth — commands a healthy premium but not FMCG-level
HDFC Bank	Banking	18x	Banks are typically valued more on P/B than P/E, but a mid-teens to 20s P/E is normal for quality banks
Tata Steel	Commodities	8x	Cyclical, capital-intensive, earnings swing with commodity prices — market applies a structural discount

Notice the pattern: it's not that Tata Steel is "cheaper" than Nestle in any meaningful sense — the two businesses have fundamentally different risk profiles, capital needs, and earnings predictability. A commodity cyclical will never trade at FMCG-like multiples, no matter how cheap it looks on paper.

Historical Nifty 50 P/E: What "Cheap" and "Expensive" Have Looked Like

Knowing where the broad market has traded historically gives context to any individual stock's valuation:

Nifty 50 P/E	What It Has Meant Historically
Below 17x	Deep value zone — seen briefly during the March 2020 crash. Historically strong long-term entry points, but often coincides with extreme fear
17x-22x	Reasonable to fair value — where the Nifty has spent much of its history over the long run
22x-28x	Above-average valuation — often seen during strong bull phases with optimistic growth expectations priced in
Above 28x-30x	Expensive zone — historically associated with market tops or frothy sentiment; forward returns from these levels have tended to be weaker

These are broad historical patterns, not a timing signal — the market can stay "expensive" or "cheap" for extended periods. Use Nifty P/E as one input for asset allocation decisions, not as a precise buy/sell trigger.

P/E vs Other Valuation Ratios: When to Use What

Ratio	Best Used For	Why
P/E	Profitable, non-cyclical businesses (IT, FMCG, pharma)	Directly compares price to what the company actually earns
P/B	Banks, NBFCs, asset-heavy or cyclical businesses	Earnings can be volatile or cyclical; the asset base is more stable
P/S (Price-to-Sales)	Loss-making or early-stage growth companies	Works even when EPS is negative, since it only needs revenue
EV/EBITDA	Comparing companies with different debt levels or capital structures	Accounts for debt and cash, unlike P/E which only looks at equity price
PEG	Comparing growth stocks with different growth rates	Adjusts P/E for the pace of earnings growth

When P/E Misleads You — Important Limitations

• Never compare P/E across sectors: FMCG companies (Nestle: 70x P/E) always trade at premiums vs commodity businesses (Tata Steel: 8x P/E). Comparing them is meaningless — each sector has its own "normal" P/E band. Always compare within the same industry.
• Low P/E doesn't always mean cheap: A stock with P/E of 5x might be cheap — or it could be a value trap. If the business is declining, earnings will fall further, making the stock even more expensive in the future. Always check the earnings trend before calling something "cheap."
• P/E is useless for cyclical companies: Steel, cement, and commodity companies have boom-bust earnings cycles. At the peak of a cycle, earnings are high so P/E looks low — and that's actually when you should sell, not buy. Use P/B (Price-to-Book) instead for cyclical stocks.
• One-time gains can distort EPS: If a company sold a factory and booked a ₹500 Cr gain, PAT shoots up and P/E looks artificially low. Always check if profits include exceptional items and strip them out for a clean picture — Screener.in shows this clearly.
• Chasing a single "magic number": There's no universal P/E that means "buy" or "sell" — the same 20x P/E can be cheap for one sector and expensive for another. Always anchor to sector peers and the company's own historical range.

Bonus: The PEG Ratio — P/E with Growth Context

The PEG ratio solves P/E's biggest flaw: it doesn't account for growth. A high-growth company deserves a higher P/E than a slow-growth one.

Formula: PEG = P/E Ratio ÷ Earnings Growth Rate (%)

PEG Value	What It Signals
Below 1	Potentially undervalued relative to growth
Around 1	Fairly priced for its growth rate
Above 2	Likely overvalued — growth already priced in

Example: A stock with P/E 40x but earnings growing at 40% has PEG = 1 — fairly priced. A stock with P/E 40x but growing at only 10% has PEG = 4 — dangerously expensive.

Never use P/E alone: P/E is a starting point, not a conclusion. Always combine it with earnings growth rate (PEG), return on equity (ROE), and balance sheet health (D/E). A stock with low P/E, high growth, strong ROE, and low debt is a very compelling opportunity.

Key Takeaway: P/E ratio tells you what the market is paying for each rupee of profit. Low P/E can mean undervalued or in trouble — context matters. Always compare within the same sector, check earnings quality, weigh where the broader market sits historically, and use PEG to factor in growth. P/E is your first filter, never your last.

Frequently Asked Questions

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

There is no universal good P/E — it depends entirely on the sector. FMCG (Nestle, HUL): 50-80x is normal. IT (TCS, Infosys): 25-35x. Banks (HDFC, Kotak): 15-25x. PSU banks: 5-12x. Auto: 15-25x. Commodity/steel: 5-15x. Always compare a stock's P/E to its own 5-year average and to sector peers, not to some arbitrary number.

Where can I find P/E ratio for Indian stocks?

Screener.in shows trailing P/E right on the company summary page. Tickertape also shows it with peer comparisons, and NSE and BSE websites show it too. For sector-wise comparison, Screener.in's industry comparison feature lets you see all companies in a sector ranked by P/E in seconds.

What is the Nifty 50 P/E and why does it matter?

The Nifty 50 P/E is the aggregate P/E of India's 50 largest companies. Historically, the Nifty trades between 15x (very cheap, near bottoms like March 2020) and 35x (expensive, near tops). When Nifty P/E is below 20x, broad markets are cheap; above 28-30x, overall markets are expensive and individual stock selection becomes even more critical.

Can a company with no profit have a P/E?

No — P/E requires positive earnings. If EPS is negative (company is loss-making), the P/E ratio is undefined or shown as N/A. For early-stage companies or startups, like Zomato in its early listed years, investors use alternative metrics like Price-to-Sales (P/S) or EV/EBITDA instead.

Should I only buy stocks with a low P/E?

No — a "low P/E only" strategy often leads straight into value traps, since low P/E frequently reflects declining or troubled businesses. A high-quality, fast-growing company can be worth paying a higher P/E for, provided the growth is real and sustainable. The goal is a reasonable price for the quality and growth on offer, not the lowest number on the screen.

How is EV/EBITDA different from P/E, and when should I use it instead?

P/E only looks at the equity price relative to profit, ignoring debt. EV/EBITDA (Enterprise Value ÷ EBITDA) accounts for a company's total value including debt and cash, making it better for comparing companies with very different debt levels or capital structures — common when comparing infrastructure, telecom, or highly leveraged businesses.