The core difference in goodwill amortization for public vs. private companies is this: a private company (or a not-for-profit) can elect to amortize goodwill on a straight-line basis over ten years or less and only test for impairment when something goes wrong, while a public business entity cannot amortize goodwill at all and must test it for impairment at least once every year. That single split drives almost every downstream difference in workload, earnings volatility, and disclosure. Federal tax law follows its own 15-year schedule for everyone, regardless of which GAAP path applies.
What Private Companies Can Elect
Under ASC 350-20, private companies and not-for-profit entities may elect an accounting alternative that amortizes goodwill straight-line over ten years, or a shorter period if the company can demonstrate a shorter useful life is more appropriate.1Financial Accounting Standards Board. Accounting Standards Update 2021-03 – Intangibles, Goodwill and Other (Topic 350) Each period, a fixed slice of the goodwill balance moves to the income statement as expense and the carrying amount on the balance sheet drops accordingly, until it reaches zero.
The election is not a menu. Once made, it applies to all goodwill already on the books and to any goodwill picked up in future acquisitions.1Financial Accounting Standards Board. Accounting Standards Update 2021-03 – Intangibles, Goodwill and Other (Topic 350) A first-time adopter can elect prospectively at the start of any fiscal year without having to argue that the new method is preferable under Topic 250. Reversing course later and going back to the indefinite-lived model is harder, because that switch would have to clear the preferability threshold. In practice, the election is sticky.
Companies that elect amortization also get a companion simplification on impairment testing: they can choose to test goodwill at the entity level rather than by reporting unit. For a smaller organization without distinct business lines, that removes a meaningful layer of work. The entity-level versus reporting-unit choice is itself an accounting policy election.
FASB extended the same amortization alternative to all not-for-profit entities, including conduit bond obligors, through ASU 2019-06.2Financial Accounting Standards Board. Accounting Standards Update 2019-06 – Intangibles, Goodwill and Other (Topic 350), Business Combinations (Topic 805), and Not-for-Profit Entities (Topic 958)
Why Public Companies Cannot Amortize
Public business entities are locked out of the amortization alternative. Goodwill sits on the balance sheet at its acquisition-date amount indefinitely and only comes down when an impairment loss is recognized. A goodwill balance tied to a well-performing acquisition can stay at the same dollar figure for years, or decades.
The reasoning is that goodwill’s economic value does not decline on a predictable schedule the way physical equipment wears out. If an acquired brand keeps producing revenue growth, writing it down every year on autopilot would misrepresent the business. The tradeoff is workload: instead of expensing goodwill over time, public companies have to keep proving the asset has not lost value.
For that testing, public companies assign goodwill to reporting units, defined as an operating segment or one level below (a component) if the component is a business with discrete financial information that segment management regularly reviews. Where the goodwill is assigned sets the level at which the impairment math gets performed, so the structure matters.
Impairment Testing: The Practical Difference
Both groups have to test goodwill for impairment. When and how are what separate them.
Private Companies
A private company using the amortization alternative only tests goodwill when a triggering event suggests the fair value of the entity (or reporting unit, depending on the election) may have fallen below carrying amount. In a quiet year, the company just records scheduled amortization and moves on. Typical triggers include a meaningful decline in economic conditions, the loss of a major customer or contract, unexpected competitive pressure, significant cost increases, operating losses or cash flow problems at the reporting unit level, and a sustained drop in the company’s own market value or key metrics.
Public Companies
A public company tests at least once a year, usually on the same date each year, whether or not anything has gone wrong. It also has to test between annual dates if a triggering event occurs in the interim.
The annual test can start with a qualitative assessment, sometimes called Step Zero. Management weighs factors like macroeconomic conditions, industry trends, cost pressures, and the company’s stock price, and asks whether it is more likely than not (greater than 50 percent) that the reporting unit’s fair value has dropped below carrying amount. If the answer is no, the analysis stops there.
If the qualitative screen raises concerns, or if management skips it, the quantitative test kicks in. ASU 2017-04 simplified this by eliminating the old two-step process. Today, the company compares the fair value of the reporting unit to its carrying amount including goodwill. If carrying amount is higher, the company records an impairment loss equal to the difference, capped at the total goodwill assigned to that reporting unit.3Financial Accounting Standards Board. Accounting Standards Update 2017-04 – Simplifying the Test for Goodwill Impairment The cap matters, because a unit’s total carrying amount can exceed fair value by more than the goodwill sitting inside it, and goodwill cannot go negative.
One feature catches people off guard: goodwill impairment losses are permanent. If a company writes down $50 million this year and the reporting unit recovers next year, the $50 million does not come back. The loss appears as its own line on the income statement before income from continuing operations, and the balance sheet goodwill is reduced for good.
Tax Treatment Does Not Follow GAAP
Federal tax rules ignore the public/private GAAP split. Under 26 U.S.C. ยง 197, goodwill acquired in connection with a trade or business is amortized ratably over 15 years, starting with the month of acquisition, whether the buyer is public, private, or not-for-profit, and regardless of book treatment.4Office of the Law Revision Counsel. 26 USC 197 – Amortization of Goodwill and Certain Other Intangibles
That mismatch creates deferred tax consequences worth tracking. A private company amortizing over ten years for book and fifteen for tax has different expense schedules, producing a temporary difference that shows up as a deferred tax asset or liability. A public company that does not amortize at all for book while deducting over fifteen years for tax sees the gap widen steadily until an impairment resets it. When goodwill is not deductible for tax at all, such as certain acquisitions caught by anti-churning rules, no deferred taxes are recorded on the book-tax difference.5Internal Revenue Service. Intangibles
Disclosure Requirements
Public companies present goodwill as a separate balance sheet line, net of accumulated impairment losses. When an impairment happens, the loss gets its own line on the income statement before the subtotal for income from continuing operations. Footnotes must include a goodwill rollforward showing opening balance, new goodwill from acquisitions, impairment losses, exchange rate effects, and ending balance, broken out by reportable segment. Each impairment loss also needs a narrative on the facts and circumstances, the dollar amount, and the valuation method used to determine fair value.
Private companies that elect the amortization alternative face no incremental disclosures beyond what Topic 805 already requires for business combinations. FASB and the Private Company Council kept the disclosure bar low on purpose, so the alternative would actually save cost. In practice, private companies note the election in their significant accounting policies and disclose the amortization period and accumulated amounts.
Going Public After Amortizing
A private company that has been amortizing goodwill and then decides to go public has to restate its financial statements to align with public company GAAP. That means retrospectively unwinding all previously recorded amortization and restoring goodwill to its acquisition-date amount, or whatever balance it would have carried under the indefinite-lived model. The company then has to go back and perform the annual impairment tests it would have run as a public entity for each of those prior periods.
Reported net income for the restated years usually rises, because the amortization expense disappears. But the company may also uncover historical impairment losses that partly or fully offset the gain. The restatement follows ASC 250 guidance on accounting changes and lands in the registration statement filed with the SEC before shares can be sold. Auditors will re-examine the restated periods under public company auditing standards.6Public Company Accounting Oversight Board. AS 2501 – Auditing Accounting Estimates, Including Fair Value Measurements
This is worth factoring in well before an IPO becomes imminent. The valuation work needed to retroactively test goodwill across several historical periods is often one of the more expensive pieces of IPO readiness.
Where the Rules May Be Headed
FASB has been actively exploring whether to extend goodwill amortization to public business entities. The Board issued an Invitation to Comment examining whether the current impairment-only model creates a cost-benefit problem for public companies and whether amortization, a simplified impairment test, or enhanced disclosures might work better. The project deliberately set aside the conceptual debate over what goodwill represents and focused on practical cost-effectiveness. As of early 2026, the Board has deliberated but has not issued a final standard changing the public company model. If a change lands, the public/private divide described here narrows or disappears.
Internationally, IFRS also treats goodwill as indefinite-lived and subject to impairment testing rather than amortization, and the IASB has its own active project on the question.7IFRS Foundation. IAS 36 Impairment of Assets Like U.S. GAAP, IFRS prohibits reversing a goodwill impairment loss once recorded. Movement by either standard-setter tends to influence the other.