Price to Book Ratio: Meaning, Example and Why It Matters
Price to book ratio compares a stock's market price with the company's book value, which is roughly what would be left for shareholders if the company sold everything it owns and paid off everything it owes.
It tells you how much you are paying for each rupee of the company's net assets.
You will often see it written as the P/B ratio. It is a favourite of value investors and the go-to number for judging banks and other asset-heavy businesses.
Here we will explain what price to book ratio means, work through a simple example in rupees, show you where you will see it, and clear up how it differs from the PE ratios.
Quick Meaning
Price to book ratio is a stock's market price per share divided by its book value per share.
Book value is the company's total assets minus its total liabilities, which is the same as its shareholders' equity. A P/B of 1 means the price equals book value.
Simple meaning: It is the price of a stock measured against what the company is worth on paper after paying its debts.
Beginner takeaway: P/B works well for asset-heavy businesses like banks, and poorly for asset-light ones whose real value sits in brands and ideas.
What does price to book ratio mean?
Let us take the term apart, piece by piece.
Price is the current market price of one share.
Book refers to book value, which is the value of the company as recorded in its accounting books, or "on the books". It is not the market value, it is the paper value.
Ratio just means we are dividing one by the other.
So price to book is the market price of a share divided by the book value of that share.
Book value itself comes straight from the balance sheet. Take everything the company owns, subtract everything it owes, and what is left belongs to the shareholders.
That leftover is the book value, also called net worth or shareholders' equity.
Short answer: Price to book ratio = market price per share ÷ book value per share. It shows how many times the company's net asset value you are paying at today's price.
A P/B of 1 means you are paying exactly the book value. A P/B of 3 means you are paying three times book value.
A P/B below 1 means the market values the company at less than its net assets on paper.
Why would anyone pay more than book value? Because a good business is usually worth more than the sum of its furniture and machines. Its brand, its customers, and its future profits are real value that the accounting books often understate.
Why does price to book ratio matter?
Price to book matters because it anchors a stock's price to something solid: the actual net assets on the balance sheet.
Profit can swing around from year to year. Book value tends to be steadier, because it is built up slowly from assets and retained profits over time. That makes P/B a calmer, more stable yardstick than a profit-based ratio in some cases.
It is especially useful in two situations.
For banks and financial companies, where the business is essentially a pile of financial assets and liabilities, P/B is the standard valuation tool. You will almost never see a bank discussed without its P/B.
For companies going through a rough patch with little or no profit, a profit-based ratio breaks down (you cannot divide by a loss sensibly). P/B still works, because book value is usually still positive.
Tip: When a company is loss-making and its PE ratio is meaningless, the P/B ratio often becomes the more useful way to size up its valuation.
Simple example
Let us use Anaya Foods Ltd, the packaged snacks company from our other lessons, so the numbers stay familiar.
Here is what its balance sheet looks like.
Total assets (factories, machines, cash, stock of goods): 525 crore rupees.
Total liabilities (loans, money owed to suppliers): 300 crore rupees.
Shareholders' equity, which is book value (assets minus liabilities): 225 crore rupees.
The company has 1.5 crore shares. So:
Book value per share = 225 crore ÷ 1.5 crore = 150 rupees.
Now bring in the market price. Anaya's share trades at 600 rupees.
Price to book ratio = 600 ÷ 150 = 4.
Read it plainly. Anaya's net assets are worth 150 rupees per share on paper, but the market is charging you 600 rupees. So you are paying four times book value.
Is that good or bad? On its own, it tells you nothing. It only becomes meaningful when you compare it with similar companies and understand why the market is willing to pay four times book value (usually because it expects strong future profits from those assets).
Notice how this ties back to profit. Anaya earns a net profit of 45 crore rupees on that 225 crore of equity.
That is a return on equity of 20 percent, which is healthy, and it helps explain why investors happily pay well above book value.
Where will you see price to book ratio?
Once you start reading about stocks, P/B shows up in specific corners more than others.
Stock screeners and investing apps, usually as a "P/B" or "Price/Book" column.
Bank and financial-sector research, where it is the headline valuation number, often alongside return on equity.
Value-investing articles and books, where buying below or near book value is a classic strategy.
Company snapshot pages, next to the PE ratio and dividend yield.
Fund factsheets, where a fund's portfolio P/B hints at whether it leans towards value or growth stocks, for example in a flexi cap fund factsheet.
Whether you invest in Indian bank stocks, or you are an NRI or resident Indian studying global financials, P/B is one number you will keep meeting.
How price to book works
To understand P/B, follow where book value comes from.
The balance sheet has two sides that always match. On one side sit the assets, everything the company owns. On the other sit the liabilities (what it owes) plus the equity (what belongs to shareholders).
Book value is that equity slice: assets minus liabilities. It grows when the company keeps profits inside the business, and it shrinks when the company makes losses or pays out more than it earns.
Simple meaning: Book value is the shareholders' share of the company on paper, and P/B tells you how much the market charges for it.
So what moves the P/B ratio? Two things.
If the share price rises while book value stays flat, P/B goes up (the stock looks more expensive relative to its assets).
If the company earns profit and retains it, book value rises, and at the same price the P/B falls (the stock looks cheaper relative to its now-larger asset base). Strong, steady profits quietly build book value year after year, which is why healthy companies keep growing their net worth.
Price to book ratio formula
There are two short steps.
Step 1: Book Value per Share = Shareholders' Equity ÷ Number of Shares
Shareholders' equity is total assets minus total liabilities.
Step 2: Price to Book Ratio = Market Price per Share ÷ Book Value per Share
Simple way to read this formula: first work out how much net asset value backs each share, then see how many times that value the market is charging you.
Check it with Anaya Foods. Book value per share is 225 crore ÷ 1.5 crore = 150 rupees. P/B is 600 ÷ 150 = 4. You are paying four times the net asset value per share.
Price to book vs PE ratio
Beginners often mix up the two big valuation ratios. Here is the clean split. Both compare price to something, but that "something" is different.
Here is the key difference.
The PE ratio measures price against profit. It answers "how much am I paying per rupee of earnings?" You can explore this in our pieces on the trailing PE ratio (based on past profit) and the forward PE ratio (based on expected profit).
The P/B ratio measures price against net assets. It answers "how much am I paying per rupee of what the company owns after debts?"
Common confusion: A high P/B is not automatically bad, and a low P/B is not automatically a bargain. A software company with few physical assets naturally has a high P/B, because its value lives in ideas, not machines. Judge P/B only against similar companies.
When P/B works well, and when it fails
This is the part most beginners miss, and it matters a lot.
P/B works beautifully for asset-heavy businesses. A bank, an NBFC, a steel plant, or a real estate firm holds a lot of value on its balance sheet, so book value is a meaningful anchor. Comparing their P/B ratios genuinely tells you something.
P/B works poorly for asset-light businesses. A software firm, a consumer brand, or a consulting company has its real worth in people, patents, brand loyalty, and future profits, not in buildings and machines.
These sit as intangible assets that are often understated or missing from the books, so book value looks tiny and P/B looks enormous. That high number does not mean the stock is overpriced.
There is also the reverse trap. Sometimes book value is inflated by goodwill, an accounting entry created when a company overpays to buy another business.
A balance sheet stuffed with goodwill can make P/B look reassuringly low while hiding weak underlying assets.
Tip: Before trusting a P/B ratio, ask whether the business is asset-heavy or asset-light. The same P/B number means completely different things for a bank and for a software company.
Common mistakes beginners make
Mistake 1: Assuming a P/B below 1 is always a bargain
A stock trading below book value looks cheap, but the market often has a reason.
It may expect the company's assets to lose value, or its book value to shrink through future losses. A low P/B can signal a genuine bargain or a business in trouble, so always dig into why before buying the "discount".
Mistake 2: Using P/B for asset-light companies
Applying P/B to a software or consumer brand company usually gives a misleading, very high number.
Their value sits in intangibles the books barely capture. For such businesses, profit-based measures usually tell you far more than P/B does.
Mistake 3: Forgetting book value is historical, not market value
Book value records assets at their original cost minus depreciation, not what they would fetch today.
A piece of land bought decades ago may sit on the books at a tiny value while being worth a fortune now. So book value can understate a company's true asset value, especially for old firms with property.
Mistake 4: Comparing P/B across very different industries
P/B only makes sense within the same sector.
Banks trade around one range, IT firms in a completely different one. Comparing a bank's P/B with a software firm's P/B is comparing apples with aeroplanes.
Mistake 5: Ignoring goodwill sitting inside book value
A large chunk of goodwill can prop up book value artificially.
If much of the equity is goodwill from past acquisitions, the "real" tangible book value is smaller, and the P/B is less comforting than it looks. Glance at how much of the book value is goodwill and intangibles before trusting the ratio.
For NRIs and global investors
Price to book works exactly the same way whether the company is Indian, American, or based anywhere else. It is a valuation concept, not a tax or banking rule, so your residential status does not change what it means.
Where it earns its keep is in comparing similar businesses across borders.
For NRIs comparing markets: If you are weighing Indian banks or financial companies against global ones, P/B is the natural yardstick, because financials are best judged on book value.
Indian banks with high return on equity often trade at higher P/B ratios than slower-growing global banks, and that premium usually reflects faster expected growth rather than overpricing.
For resident Indians investing globally: The same logic helps when you diversify beyond India.
Comparing the P/B of a US or European bank with an Indian one shows what you are paying for each rupee, or dollar, of net assets, before layering on growth expectations.
This can be a useful lens when you look at funds with consistent long-term returns that hold financial stocks.
That said, P/B is only one input. When you actually invest across borders, the tax on your gains, currency movement, and repatriation rules all matter, and those depend on your residential status and the route you use.
For anything tax related, check the current rules from official sources or a qualified advisor.
A quick word on book value and share price
A common tangle is thinking book value per share should be close to the share price. It usually is not, and that is normal.
Book value is an accounting figure. The market price reflects hopes about future profits, brand strength, and growth, which the books do not capture. This is similar to how a mutual fund's NAV, or per-unit value, is not the same as whether the fund is cheap or expensive.
For a strong, profitable company, the share price sitting well above book value is a sign of health, not overpricing.
It means the market believes the assets will generate good returns, much like why quality stocks command higher valuations even when markets are already at high levels.
Mini checklist
Before you lean on a P/B ratio to judge a stock, quickly check:
Is this an asset-heavy business (bank, manufacturer) where P/B is meaningful, or asset-light where it misleads?
If P/B is below 1, is there a worrying reason, or a genuine bargain?
How much of the book value is goodwill or intangibles?
Are you comparing P/B only with companies in the same industry?
What is the return on equity? A high P/B is easier to justify when returns on equity are strong.
Practical takeaway
The simple way to remember price to book: it is the share price divided by the company's net assets per share, so it prices a stock against what it owns after paying its debts.
Use P/B mainly for banks and asset-heavy companies, always alongside return on equity, and never on its own. For asset-light businesses, lean on profit-based measures instead, and remember that a number below 1 is a question to investigate, not an automatic bargain.
FAQs
What is the price to book ratio in simple words?
It is the market price of a share divided by the company's book value per share. Book value is total assets minus total liabilities, so P/B shows how much you pay for each rupee of the company's net assets.
What is a good price to book ratio?
There is no single good number. It depends entirely on the industry. Banks often trade near one to three times book, while asset-light software firms trade much higher. Always compare a P/B with similar companies in the same sector.
Does a P/B below 1 mean the stock is cheap?
Not always. A P/B below 1 means the market values the company below its net assets on paper, which can be a bargain or a warning that the market expects losses or falling asset values. Investigate the reason before assuming it is cheap.
What is the difference between price to book and PE ratio?
Price to book compares the share price with the company's net assets (book value), while the PE ratio compares it with yearly profit (earnings). P/B suits banks and asset-heavy or loss-making firms, and PE suits steadily profitable companies.
Why do banks use the price to book ratio so much?
A bank's business is essentially financial assets and liabilities recorded on its balance sheet, so book value is a meaningful, stable anchor for its worth. That is why P/B, usually paired with return on equity, is the standard way to value bank stocks.
Is book value the same as market value?
No. Book value is an accounting figure based on the original cost of assets minus depreciation. Market value reflects what investors will pay today, including hopes about future profits and growth, which the books do not capture.
Does the price to book ratio matter for NRIs buying Indian stocks?
Yes. P/B works the same regardless of residency and is especially useful for comparing Indian banks and financial companies with global ones. Your own tax on any gains still depends on your residential status and current rules.
Final summary
Price to book ratio is basically the share price divided by the company's net assets per share, so it prices a stock against what it owns after clearing its debts. It anchors value to the balance sheet rather than to profit.
It shines for banks and asset-heavy companies, and for firms with little or no profit where a PE ratio stops working. It misleads for asset-light businesses whose value lives in brands and ideas, not on the books.
Read it alongside return on equity, compare it only with peers in the same industry, and treat a sub-1 P/B as a question to explore, not a guaranteed bargain.
If you are studying a stock, use P/B where the balance sheet actually holds the value, check how much is goodwill, and pair it with profit-based ratios before deciding anything.
Suggested Reading
Securities and Exchange Board of India (SEBI), for company disclosures and how listed companies report their balance sheets: https://www.sebi.gov.in
Reserve Bank of India (RBI), for context on how banks and financial companies are regulated and report capital: https://www.rbi.org.in
NSE and BSE company pages, where you can see reported book value and P/B data for listed Indian companies: https://www.nseindia.com and https://www.bseindia.com
Accuracy note
This article is for general education only and is not investment or tax advice. Valuation figures and examples are illustrative. Reported balance sheet figures, market prices, and tax rules can change, so verify the latest position from official sources such as SEBI, the RBI, the NSE, the BSE, or a qualified advisor before making any decision. A P/B ratio is only one input and should never be used in isolation.
