ASC 350 Goodwill and Intangible Assets Under US GAAP: Amortisation and Impairment

Intangible assets and goodwill increasingly drive company value, and ASC 350 sets the U.S. rules for accounting for them. It distinguishes finite-lived intangibles, which are amortised, from indefinite-lived intangibles and goodwill, which are not amortised but tested for impairment. This guide explains recognition, the amortisation distinction, the impairment regimes, and how US GAAP compares with IFRS on intangibles.

How does ASC 350 classify intangible assets?

ASC 350 divides intangible assets by useful life. A finite-lived intangible — a patent, a customer relationship, a defined-term licence — is amortised over its useful life and tested for impairment only when indicators suggest its carrying amount may not be recoverable, under the ASC 360 long-lived asset model. An indefinite-lived intangible — such as certain trademarks or broadcast licences renewable at little cost — is not amortised but is tested for impairment at least annually and whenever indicators arise.

Determining whether an intangible has a finite or indefinite life is a significant judgment that drives whether it is amortised. The classification is reassessed each period, and an indefinite-lived intangible can be reclassified as finite-lived if circumstances change, triggering amortisation from that point. This finite-versus-indefinite distinction, and the differing impairment regimes that follow, is the organising principle of intangible accounting under ASC 350, closely paralleling the IFRS treatment under IAS 38.

How is goodwill recognised and treated?

Goodwill arises only in a business combination, as the excess of the consideration transferred over the fair value of the identifiable net assets acquired — it is never recognised for internally generated goodwill. Under ASC 350, goodwill is not amortised for public companies; instead it is assigned to reporting units and tested for impairment at least annually, reflecting the view that goodwill does not decline in a predictable, systematic pattern.

A notable U.S. feature is the private-company accounting alternative: private companies may elect to amortise goodwill over a period of up to ten years and to test for impairment only on a triggering event, simplifying the burden for businesses without public accountability. This option does not exist under IFRS or for U.S. public companies. The treatment of goodwill, including its impairment testing, is explored in depth in a dedicated article in this hub, as it is one of the most scrutinised areas of accounting.

How are finite-lived intangibles amortised?

Finite-lived intangible assets are amortised over their useful lives, using a method that reflects the pattern in which the asset’s economic benefits are consumed, or straight-line if that pattern cannot be reliably determined. The useful life reflects factors such as legal or contractual terms, the expected use of the asset, and the effects of obsolescence and competition. The useful life and amortisation method are reviewed each period and adjusted prospectively if expectations change.

Finite-lived intangibles are tested for impairment under the ASC 360 long-lived asset model — the same two-step recoverability test used for property, plant and equipment — only when events or changes in circumstances indicate the carrying amount may not be recoverable. This means amortising intangibles are not subject to the mandatory annual test that applies to goodwill and indefinite-lived intangibles, reflecting the view that amortisation already systematically reduces their carrying amount.

Can internally generated intangibles be capitalised?

Like IFRS, US GAAP generally prohibits recognising internally generated goodwill and most internally generated intangible assets, because their cost cannot be reliably separated from the cost of developing the business as a whole. Internally created brands, customer lists, and similar items are not capitalised. The same brand, if acquired in a business combination, would be recognised at fair value, creating the familiar disconnect between book value and economic value for intangible-rich businesses.

A key difference from IFRS lies in research and development: US GAAP requires R&D to be expensed as incurred, with a narrow exception for certain software development costs, whereas IFRS requires capitalising development costs once criteria are met. This means a U.S. company expensing its development spend may show a leaner asset base and more volatile profit than an IFRS peer that capitalises the same spend, a difference explored from the IFRS side in our IFRS hub.

How do software costs fit into ASC 350?

Software accounting is a significant practical area under US GAAP, with specific guidance depending on the software’s purpose. Costs of software developed or obtained for internal use are capitalised once the project reaches the application development stage, with earlier preliminary-stage and later operating-stage costs expensed. Costs of software to be sold, leased, or marketed are capitalised only after technological feasibility is established, with research-stage costs expensed.

Cloud computing arrangements added further complexity: where a company pays for software as a service rather than acquiring a software asset, it generally does not recognise an intangible, and implementation costs of such hosting arrangements follow specific guidance on capitalisation and expense. For technology-reliant businesses, mapping each category of software and digital spend to the correct treatment under US GAAP is essential to avoid both over-capitalisation and inconsistent accounting, an area where the detailed rules-based nature of US GAAP is particularly evident.

How are intangibles acquired in a business combination treated?

When intangible assets are acquired as part of a business combination, ASC 805 requires them to be recognised separately from goodwill at their acquisition-date fair value, provided they are identifiable — either arising from contractual or legal rights or capable of being separated and sold. This brings assets such as customer relationships, brands, technology, and order backlogs onto the balance sheet even though, if internally generated, they could not have been recognised under ASC 350.

This is why acquisitions can substantially change a group’s intangible profile. The purchase price allocation identifies and values these intangibles, with the residual becoming goodwill. The split matters because finite-lived acquired intangibles are amortised, reducing future profit, while goodwill is only impairment-tested. Acquirers therefore undertake a rigorous valuation exercise to identify and value acquired intangibles, often with specialists, and the outcome shapes reported earnings for years. This intersection of ASC 350 and ASC 805 is explored further in this hub’s business combinations articles.

How do indefinite-lived intangibles get impairment tested?

Indefinite-lived intangible assets other than goodwill — such as certain trademarks, broadcast licences, or trade names expected to generate cash flows indefinitely — are not amortised but must be tested for impairment at least annually and whenever indicators arise. The quantitative test compares the fair value of the indefinite-lived intangible with its carrying amount, recognising an impairment loss for any excess of carrying amount over fair value. As with goodwill, an optional qualitative assessment can be performed first to determine whether the quantitative test is necessary.

The classification of an intangible as indefinite-lived is itself a significant and reassessed judgment, because it determines whether the asset is amortised or only impairment-tested. If circumstances change such that the life becomes finite, the intangible begins amortising and is thereafter tested under the long-lived asset model. For businesses holding valuable brands and licences, the annual impairment testing of indefinite-lived intangibles is a recurring requirement that, like goodwill testing, depends on fair value estimates and careful documentation.

What is the private company alternative for goodwill and intangibles?

US GAAP includes accounting alternatives, developed through the Private Company Council, that simplify goodwill and certain intangible accounting for private companies. Under these alternatives, a private company may elect to amortise goodwill over a period not exceeding ten years (or less if a shorter life is more appropriate) and to test goodwill for impairment only upon a triggering event rather than annually. A related alternative allows certain customer-related intangibles and non-compete agreements not to be recognised separately from goodwill in a business combination.

These alternatives recognise that the full public-company goodwill regime is costly and of limited benefit for businesses without public accountability. They reduce the burden of annual impairment testing and separate intangible valuation, simplifying both acquisition accounting and ongoing reporting. No equivalent options exist under IFRS or for U.S. public companies, making this a distinctive feature of the U.S. system. A private company contemplating an eventual public offering should consider that adopting these alternatives may need to be unwound later, a planning point worth weighing before electing them.

Why does so much intangible value stay off the balance sheet?

Like IFRS, US GAAP’s prohibition on recognising internally generated goodwill and most internally generated intangibles means that much of the value modern companies create never appears as an asset. Internally built brands, customer relationships, know-how, and assembled workforces are not capitalised, because their cost cannot be reliably separated from the cost of running the business as a whole. The same intangibles, if acquired in a business combination, would be recognised at fair value, creating a sharp asymmetry between built and bought value.

This produces the well-known disconnect between book value and market value for intangible-rich businesses, particularly in technology, consumer, and services sectors, where companies often trade at many multiples of net asset value precisely because their most valuable assets are invisible to the balance sheet. For finance leaders, this means the balance sheet understates economic resources, and the narrative must look beyond it — through management commentary and key performance indicators — to convey the value being built. Recognising this gap is essential to interpreting the accounts of modern businesses, a theme common to both US GAAP and the IFRS treatment in our companion hub.

How do useful lives and amortisation methods get reviewed?

For finite-lived intangibles, US GAAP requires the useful life and amortisation method to be reviewed periodically and adjusted prospectively if expectations change, treating the change as a change in accounting estimate. A patent whose competitive value erodes faster than expected, or a customer relationship that proves more durable than originally assumed, would prompt a revision to the remaining amortisation. These reviews keep amortisation aligned with the actual pattern in which the intangible delivers benefits.

The amortisation method should reflect the pattern of consumption of the asset, defaulting to straight-line where that pattern cannot be reliably determined. For intangibles whose benefits are front-loaded or tied to usage, an accelerated or units-based method may be more faithful. Reviewing these assumptions each period, rather than rolling them forward unchanged, is part of disciplined intangible accounting and ensures the carrying amount and amortisation expense remain a faithful representation, in keeping with the rigour this hub emphasises across every standard.

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