Key Insight
Book value is what accountants say the business is worth. Market value is what buyers will actually pay. For most small businesses, market value far exceeds book value — the gap is goodwill, which book value ignores.
Why Book Value Diverges from Market Value
Depreciation: Assets are depreciated according to accounting schedules that don't reflect actual remaining useful life. A 10-year-old piece of equipment that still works fine may be fully depreciated (book value: $0) but has real economic value.
Goodwill isn't on the balance sheet (for existing businesses): Goodwill only appears on a balance sheet after an acquisition. A business that built $2M in customer relationships over 20 years carries $0 in relationship value on its own books.
Intangibles: Customer lists, proprietary processes, brand reputation, and assembled workforce have economic value that accounting standards don't capture as assets.
Appreciation: Real estate and some other assets may have appreciated significantly from their recorded historical cost.
When Book Value Matters
Asset-heavy businesses: For businesses primarily valued on tangible assets (equipment-heavy manufacturing, trucking, real estate), book value is more meaningful — the market value of the equipment is often close to its depreciated book value.
Liquidation scenarios: If a distressed business is being purchased for its asset value (not as a going concern), book value of tangible assets (adjusted to fair market value) drives the price.
Minimum price floor: Buyers sometimes use book value as a floor in negotiations — arguing they won't pay less than the adjusted net asset value even if earnings-based valuation suggests a lower number.
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