Price-to-Book Calculator

Price-to-Book Ratio — What You Pay vs What You Get

Price-to-Book (P/B) compares the market price of a share to its book value per share. Book value is what shareholders would theoretically receive if the company liquidated all assets and paid off all liabilities. A P/B of 2 means you are paying ₹2 for every ₹1 of net assets.

P/B is particularly useful for asset-heavy businesses — banks, NBFCs, steel, cement — where the balance sheet is a reasonable proxy for value. It is much less useful for asset-light businesses, where the true value resides in brand, intellectual property, or human capital — none of which sit on the balance sheet at full worth.

P/B for Banks — The Anchor Valuation Metric

For Indian banks, P/B is the primary valuation metric — more reliable than PE, which fluctuates with provisioning cycles. HDFC Bank has historically commanded a P/B of 3.5–5x because of its superior return on equity (consistently above 16%), low NPA ratios, and strong deposit franchise. Axis Bank traded at 1.5–2.5x P/B for years when its NPA problems were visible — a discount that priced in the asset quality risk directly.

A bank trading below 1x P/B is either deeply distressed or deeply undervalued. PSU banks spent years below 0.5x P/B during the NPA crisis of 2015–2020. Those who bought State Bank of India at 0.5x P/B in 2020 and held through the NPA resolution cycle saw the stock re-rate to 1.5x P/B by 2024 — a 3x return driven entirely by valuation re-rating, not just earnings.

When P/B Below 1 Is a Value Trap

A stock trading below book value (P/B < 1) is not automatically cheap. It can be a trap. If the assets on the balance sheet are overstated — bad loans for banks, obsolete machinery for manufacturers, unsold inventory for real estate developers — then the reported book value is fiction. The market is right to price it below the stated book.

Real estate companies in India have repeatedly shown this trap. Balance sheets showed substantial land banks at historical cost, but those assets were illiquid, had unclear titles, or sat in projects where regulatory approvals stalled. P/B well below 1 was a distress signal, not a buying opportunity, for many mid-sized developers in 2019–2020.

The test: is the low P/B accompanied by a positive and rising ROE? If ROE is 15% but P/B is 0.8x, that is a genuine value opportunity. If ROE is 4% and falling, the low P/B reflects a business that is destroying shareholder value — the market is correct.

Intangible-Heavy Companies and P/B Limitations

For companies like TCS, Infosys, or Asian Paints, P/B ratios look astronomically high — TCS trades at 12–15x P/B. This is not irrational. The book value massively understates intrinsic value because the most valuable assets — TCS's client relationships built over decades, Infosys's delivery capabilities, Asian Paints's dealer network — are not on the balance sheet.

In these cases, use P/B only as a historical reference point: is today's P/B higher or lower than its 5-year average? If TCS's P/B has ranged from 10x to 18x over five years and is currently at 12x, the stock is at the cheaper end of its historical valuation band, even though 12x P/B sounds expensive in absolute terms.