If a company closed down tomorrow — sold every asset, paid every debt, and distributed what remained to shareholders — how much would each shareholder get? That number is the book value per share.
It sounds simple. But it is one of the most misunderstood metrics in investing — partly because the market almost never values companies at book value, and partly because book value misses some of the most important things about a business.
What is Book Value of a Share?
Book value per share is the net worth of a company — total assets minus total liabilities — divided by the total number of shares outstanding. It represents what each shareholder would theoretically receive if the company liquidated today at the values recorded on the balance sheet. For banks and financial companies, book value is the primary valuation benchmark because their business is built entirely around balance sheet assets.
The Formula
Book Value = Total Assets − Total Liabilities
Book Value Per Share = Book Value ÷ Total Shares Outstanding
Price-to-Book (P/B) Ratio:
P/B Ratio = Market Price per Share ÷ Book Value per Share
A P/B of 1 means the market values the company exactly at its accounting net worth. Above 1 means the market pays a premium for expected future earnings. Below 1 means the market values the company at less than its stated net assets.
A Practical Example
Consider a simplified balance sheet:
| Amount | |
|---|---|
| Total Assets | ₹1,00,000 Cr |
| Total Liabilities | ₹70,000 Cr |
| Net Worth (Book Value) | ₹30,000 Cr |
| Shares Outstanding | 100 crore |
| Book Value per Share | ₹300 |
If this company's stock trades at ₹600, the P/B ratio is 2x — the market pays double the accounting net worth, implying confidence in future earnings.
P/B Ratio by Sector (India)
According to NSE India data, as of March 2026, Indian sectors show markedly different P/B ranges:
| Sector | Typical P/B Range | Why |
|---|---|---|
| Private Banks (HDFC, ICICI, Kotak) | 2.5–4.5x | Asset quality + ROE premium |
| PSU Banks (SBI, Bank of Baroda) | 0.8–1.8x | Lower ROE, NPA concerns |
| NBFCs (Bajaj Finance) | 4–7x | High growth, strong asset quality |
| IT (TCS, Infosys, HCL) | 6–12x | Asset-light, very high ROE |
| FMCG (HUL, Nestlé, Britannia) | 8–20x | Brand value not on balance sheet |
| Auto (Maruti, Bajaj Auto) | 3–6x | Tangible assets + strong earnings |
| Pharma (Sun Pharma, Cipla) | 3–5x | IP value partially off balance sheet |
| Cement (UltraTech) | 3–5x | Asset-heavy but high returns |
Where Book Value Works Best: Banks and NBFCs
For banks, the business model is built entirely on balance sheet assets and liabilities. Loans (assets) and deposits (liabilities) determine the bank's earnings through the spread between lending and borrowing rates.
Because a bank's earning power is directly tied to the quality and quantity of its balance sheet, P/B becomes a natural benchmark:
- HDFC Bank has consistently traded at 3–4x book, reflecting best-in-class asset quality (low NPA) and high ROE (~17%)
- SBI trades at 1.2–1.8x book, reflecting its lower but improving ROE (~14%) and a larger proportion of riskier lending
The ROE-P/B relationship is direct: as long as a bank's ROE exceeds its cost of equity (roughly 12–14% for Indian banks), it deserves to trade above book value. Higher ROE = higher justifiable P/B.
Where Book Value Misleads: Asset-Light Businesses
For IT companies, FMCG, and service businesses, book value dramatically understates the business's real worth.
TCS's primary asset is its workforce — 600,000+ employees, client relationships built over decades, and proprietary delivery frameworks. None of these appear at fair value on the balance sheet. The balance sheet shows cash, computers, and office buildings. The market knows the real assets are the earnings power — hence TCS trades at 10x+ book value.
The lesson: A high P/B ratio is not automatically expensive for asset-light businesses. For a company with ROE of 30%, a P/B of 8x may be perfectly rational.
The P/B and ROE Relationship (The Most Important Test)
The most useful way to use P/B is alongside ROE:
| P/B | ROE | Interpretation |
|---|---|---|
| Low (< 1) | High (> 12%) | Potential undervaluation — worth investigating |
| Low (< 1) | Low (< 8%) | Value trap — the business doesn't earn enough on its assets |
| High (> 3) | High (> 20%) | Justified premium — strong business compounding returns |
| High (> 3) | Low (< 10%) | Overvalued — market paying for potential that isn't materialising |
This framework — popularised by quality investors globally — is especially useful for evaluating Indian bank stocks where P/B is the primary lens.
What Book Value Cannot Tell You
Book value tells you what the company owns and owes. It does not tell you:
- Whether management is using those assets efficiently
- Whether earnings are growing, flat, or declining
- Whether the latest quarter's results reflect genuine business health or one-time items
- Whether the management's capital allocation decisions (acquisitions, buybacks, capex) are creating or destroying value
Two companies with identical book values can have radically different investment outcomes — because one has management that compounds returns, and the other does not.
StockMirror's Management Confidence signal and Earnings Quality signal address exactly this gap. The screener shows you, for every company, whether management sounds confident about capital deployment in its latest earnings call — the real-time read that balance sheet book value cannot provide.
→ Filter stocks by Management Confidence and Earnings Quality on StockMirror
Key Takeaways
- Book value per share = (Total Assets − Total Liabilities) ÷ Shares outstanding — it is the accounting net worth per share
- P/B ratio = Market Price ÷ Book Value per share — the most used metric for banks and financial companies
- A P/B below 1 is potentially undervalued only if ROE is above 12%; below 1 with low ROE is usually a value trap
- For IT and FMCG companies, high P/B (6–15x) is normal because earnings far exceed balance sheet assets
- According to NSE India data, Nifty 50 trades at approximately 3.5x book value as a whole — but sector ranges vary dramatically
- Book value is a snapshot of accounting history — it cannot tell you about management quality or earnings momentum
Frequently Asked Questions
What is the book value of a share?
Book value per share is a company's net worth — total assets minus total liabilities — divided by the number of shares outstanding. It represents what shareholders would theoretically receive per share if the company liquidated at balance sheet values today. It is an accounting construct and typically far lower than the market price for profitable businesses.
What is the difference between book value and market value?
Book value is what the accounts say the company is worth — based on historical cost of assets minus liabilities. Market value (market cap) is what investors agree to pay based on future earnings expectations. For a high-quality company like TCS, market value is 10x+ book value because the market prices in decades of future earnings, not just today's balance sheet.
What does a P/B ratio below 1 mean?
P/B below 1 means the stock trades below its net asset value — cheaper than accounting liquidation value. This can be a genuine value opportunity if the company has high ROE (above 12%) — it means the market is pricing it below intrinsic worth. Or it is a value trap if ROE is low — the business cannot generate returns above its cost of capital and the low price is justified.
Which sectors use book value for valuation in India?
Banks, NBFCs, and insurance companies are primarily valued on P/B because their business is the balance sheet — loans are assets, deposits are liabilities, and earnings come from the spread. Private banks like HDFC Bank and ICICI Bank trade at 2.5–4.5x book. Asset-light businesses like IT and FMCG are not meaningfully valued on book — earnings-based multiples (PE, EV/EBITDA) are more relevant.
What is a good P/B ratio for Indian stocks?
It depends entirely on the sector. Private banks: 2.5–4x. PSU banks: 0.8–1.8x. IT companies: 6–12x. FMCG: 8–20x. The meaningful comparison is always within the same sector and against the company's own historical P/B range — never a universal number applied across sectors.
Related: P/B Ratio & EV/EBITDA Explained · ROE vs ROCE vs ROA · Intrinsic Value of a Stock
Disclaimer: This article is for educational purposes only and does not constitute investment advice. Always do your own research before making investment decisions.