Book Value

Book value is the balance sheet's summary of a company's net worth in accounting terms. It equals total assets (cash, property, equipment, investments, inventory, intangibles) minus total liabilities (loans, accounts payable, deferred revenue, pension obligations). What remains is the equity attributable to common shareholders — also called shareholders' equity or net worth — which divided by shares outstanding gives book value per share.

For most of its history, Berkshire Hathaway used growth in book value per share as a proxy for growth in intrinsic value, reporting it alongside the S&P 500 total return in its annual letter. Between 1965 and 2019, Berkshire compounded book value per share at roughly 19% annually, dwarfing the S&P 500. In 2019, Buffett announced he would no longer highlight book value per share growth as the primary metric, arguing that the shift toward operating businesses (rather than just securities) made book value a less reliable proxy for intrinsic value.

Tangible book value per share is a stricter version that subtracts goodwill and identifiable intangible assets from book value. When companies make large acquisitions at premiums to book, the excess purchase price over the acquired company's net assets is recorded as goodwill on the balance sheet. Goodwill is not a hard asset — it cannot be sold or collateralized easily — so some analysts strip it out to get a harder, more conservative measure of net assets.

Market value frequently diverges from book value. High-quality franchises with strong brands, loyal customers, and high ROIC trade at significant premiums to book because the market recognizes value that GAAP accounting does not capture. Coca-Cola's brand alone is estimated to be worth tens of billions of dollars, but the accounting rules do not allow internally generated intangibles to appear on the balance sheet at fair value. Conversely, distressed companies or those with impaired assets may trade below book value, which can be an opportunity or a warning.

In banking, book value takes on special importance. Bank regulators require financial institutions to maintain minimum levels of tangible common equity relative to risk-weighted assets. A bank trading below tangible book value faces stigma and may indicate the market believes hidden losses in the loan portfolio will further erode equity — a dynamic that played out vividly during both the 2008 financial crisis and the 2023 regional bank stress.

When Book Value Matters: Book value is most analytically useful in industries where assets are the business — financial services, insurance, real estate, and natural resource companies — and least useful for asset-light franchises built on intangible competitive advantages. For a property and casualty insurer like Berkshire Hathaway's insurance subsidiaries, book value approximates the conservatively stated value of the investment portfolio backing policyholder obligations, making it a reasonable floor for intrinsic value. For a bank like Wells Fargo, price-to-tangible-book is the dominant multiple used by analysts and acquirers because bank assets (loans, securities) are marked closer to economic value than the assets of an industrial company. By contrast, applying book value analysis to Microsoft or Apple tells you almost nothing meaningful: Microsoft's vast installed base of enterprise software customers, Azure platform relationships, and gaming IP do not appear on the balance sheet at anything close to their economic worth, so book value dramatically understates the business's value. The practical rule is to reach for book value analysis when physical or financial assets are the primary value driver, and to set it aside when the value driver is brand, customer relationships, or proprietary technology.

Tangible Book Value: Tangible book value per share takes reported book value and subtracts goodwill and all identifiable intangible assets — acquired technology, customer relationships, trade names, and patents recorded through purchase price allocations — leaving only the hard, touchable net asset value of the business. This figure is particularly relevant for banks and financial institutions, where regulators focus on tangible common equity ratios as a measure of the capital available to absorb losses without depending on the recovery value of intangibles. After large acquisitions, goodwill can be a significant fraction of total reported book value, and tangible book strips this out to show the more conservative, creditor-relevant equity cushion. For industrial companies that have grown through acquisition, tangible book value per share can be dramatically lower than reported book value per share, reminding investors that a high book value padded with acquisition-era goodwill is not the same as a strong tangible asset base.