Investing term
What is Book value?
Total assets minus total liabilities — the accounting net worth of the business.
Book value is a company's accounting net worth — total assets minus total liabilities — as recorded on the balance sheet. It's what would theoretically remain for shareholders if the company sold everything at its stated value and paid off all its debts.
It's a backward-looking, accounting figure, and its usefulness varies hugely by business type. For asset-heavy companies — banks, insurers, property firms — book value approximates real, saleable assets and can anchor a valuation. For asset-light businesses — software, brands, services — it badly understates worth, because the real value lives in intangibles like code, customer relationships, and brand that accounting barely captures. So book value is a starting point for some companies and nearly meaningless for others.
Book value is total assets minus total liabilities — the company's stated net worth. A rough floor for asset-heavy firms, but it barely captures the intangibles that make asset-light businesses valuable.
For example
A company with $10M of assets and $6M of liabilities has a book value of $4M — its accounting net worth, whatever the market thinks it's worth.
Learn it by doing
That's Book value in theory — it clicks when you use it. Practise it hands-on in a free, interactive lesson (Stage 15, Valuation for Investors).
Try the free lesson →Why it matters to you
Book value matters mainly as the denominator of the price-to-book ratio and as a rough floor for asset-heavy businesses. Its bigger lesson is its limits: because accounting struggles to value intangibles, book value systematically understates modern, asset-light companies, so judging them cheap or dear on price-to-book misleads. Knowing when book value is meaningful (asset-heavy) and when it isn't (asset-light) is what keeps it a useful tool rather than a trap.
⚠ Applying book value to asset-light businesses
Book value barely captures intangibles — brand, software, patents, customer relationships — which are the real worth of many modern companies. Judging a software or consumer-brand business as expensive because it trades far above book value misreads the metric: its value simply isn't on the balance sheet. Book value is meaningful for asset-heavy firms, not asset-light ones.