amortization of intangibles
/ am-or-ti-ZAY-shun /
Depreciation spreads the cost of a physical asset like a truck over the years it serves you. But businesses also pay for things you cannot touch — a patent, a software licence, a customer list — that nonetheless help for several years. It would be just as wrong to expense a 20-year patent all at once as it would be for a building. The way accountants spread the cost of these intangible assets over their useful lives is amortization.
Amortization of intangibles is the systematic allocation of the cost of an intangible asset with a finite useful life over that life. It is the intangible-world twin of depreciation: same logic, same matching principle, just applied to non-physical assets like patents, copyrights, licences, and certain software. In practice the straight-line method is almost always used, and there is usually no salvage value, so a 50,000 patent with a 10-year useful life is amortized at 5,000 a year. A key distinction: intangibles with an indefinite useful life — such as goodwill and some trademarks — are not amortized at all; instead they are tested for impairment each year.
Amortization matters because intangibles are a growing share of what modern companies own — software, brands, intellectual property — and amortization governs how their cost flows into profit. It quietly reduces reported earnings each year while reducing the intangible's book value on the balance sheet. The honest caveats: estimating an intangible's useful life is often harder than for a machine (how long is a patent really valuable?), and internally generated intangibles like a brand a company built itself usually are not capitalized at all under accounting rules, so the most valuable intangibles are frequently invisible on the balance sheet.
A company buys a patent for 50,000 with a 10-year remaining useful life and no salvage value. Using straight-line amortization, it records 50,000 / 10 = 5,000 of amortization expense each year, and the patent's book value drops by 5,000 annually until it reaches zero. By contrast, goodwill the company also holds is not amortized — it is just tested for impairment.
Finite-life intangibles are amortized like depreciation; indefinite-life ones are tested for impairment instead.
Not every intangible is amortized: those with indefinite useful lives, including goodwill, are impairment-tested instead. And brands or know-how a company builds itself usually never appear as assets, so the balance sheet undercounts true intangible value.