GAAP vs IFRS Impairment Reversal: One-Way vs Two-Way Write-Downs

Key Takeaways

• GAAP vs IFRS impairment reversal: IFRS requires reversal when indicators show recovery, capped at what carrying amount would have been without the original write-down; GAAP freezes the write-down permanently as the new cost basis.
• In the worked example, a copper plant written down by $150 million recovers to a $360 million ceiling under IFRS, producing a $130 million income gain two years later; under GAAP, that $130 million is never recognized on the income statement.
• Both standards prohibit goodwill reversal, this is the one area of full agreement, because goodwill recovery is presumed to be internally generated goodwill that cannot be capitalized.
• IFRS reversals are non-cash gains just like original impairments are non-cash losses; most analysts strip both out of normalized earnings when assessing sustainable performance.

What It Is

After an asset has been written down, its future value can recover. Perhaps a commodity price rebounded, a factory was successfully retooled, or a regulatory ruling went the company's way. The accounting question is whether that recovery should flow back through the income statement as a reversal of the earlier loss.

Under IAS 36, the IFRS standard, reversal is not only allowed, it is required when indicators show the original impairment drivers have reversed. The reversal is capped so the asset cannot be restored above what its carrying amount would have been had no impairment occurred. Reversal is explicitly prohibited for goodwill.

Under ASC 360 (long-lived assets to be held and used) and ASC 350 (goodwill and indefinite-lived intangibles), reversal is prohibited entirely. Once written down, the reduced carrying amount is the new cost basis. It cannot be written back up.

The Intuition

The two boards framed the same economic event differently. IAS 36 treats a write-down as a remeasurement: if circumstances change, remeasure again. Refusing to reverse would leave the balance sheet stuck at a valuation that everyone now agrees was too low.

The FASB was more worried about earnings management. If reversals were allowed, management could take aggressive write-downs in a bad year to clear the deck, then reverse them later to smooth future results. Prohibiting reversal removes that lever and keeps write-downs one-way.

The result is a structural earnings difference during commodity cycles, industrial recoveries, and real-estate rebounds. IFRS filers can recognize positive income from reversed impairments. US filers cannot, even when the underlying facts are identical.

How It Works

Under IAS 36:

At each reporting date, an entity assesses whether any indicators suggest a previously recognized impairment loss (other than on goodwill) no longer exists or has decreased. If so, the recoverable amount is recalculated. If recoverable amount exceeds current carrying amount, the impairment is reversed in profit or loss (or, for revalued assets under IAS 16 or IAS 38, in other comprehensive income). The reversal is limited so the restored carrying amount cannot exceed what the carrying amount would have been, net of depreciation, if no impairment had ever been recognized.

Goodwill under IAS 36 paragraph 124: any subsequent increase in the recoverable amount of goodwill after impairment is presumed to be internally generated goodwill, which under IAS 38 cannot be capitalized. Reversal is therefore prohibited.

Under ASC 360:

Once a long-lived asset has been written down under the two-step test, the written-down carrying amount becomes the new cost basis and is depreciated over the remaining useful life. The asset can be held at or below that basis but never written back up, even if its fair value fully recovers.

Under ASC 350:

Goodwill impairment is irreversible. Indefinite-lived intangibles (such as certain trade names or broadcast licenses) are also tested annually and, once written down, cannot be written back up.

The practical asymmetry is that IFRS gives later income statements a mechanism to restore value while GAAP freezes the write-down in place.

Worked Example

A mining company's copper processing plant is carried at $400 million on the balance sheet. A multi-year slump in copper prices drives recoverable amount below carrying. The company books an $150 million impairment, reducing the asset to $250 million.

Two years later, copper prices rebound, and the plant's recoverable amount rises to an estimated $380 million (still below the $400m original, after accounting for two years of depreciation the asset would have taken). Assume straight-line depreciation would have reduced the $400m asset to $360m over those two years in the "no impairment" scenario.

Carrying amount today (post-depreciation of written-down value): $230m
Recoverable amount today:                                        $380m
Ceiling ("what carrying amount would have been"):                $360m

Under IAS 36: the impairment is reversed. The asset is written back up to the ceiling of $360m, a $130m gain through profit or loss. Depreciation for subsequent periods is based on the restored $360m.

Under ASC 360: no reversal is permitted. The asset stays at $230m and continues to depreciate. The $130m of recovered value is simply not recognized in the financial statements. If the plant is ever sold, the gain on sale will pick up the unrecognized appreciation.

Same facts. Different standard. Different income statement and different balance sheet for years to come.

Common Mistakes

1. Treating an IFRS reversal as "improved" operating performance. A reversal is a non-cash gain that reflects changed assumptions. Most analysts strip it out of normalized earnings the same way they strip out original impairments. Both are one-time.

2. Assuming US GAAP filers are penalized. They are not. The economic value is still there; it simply is not on the balance sheet. Any gain is captured at sale through a larger realized gain. Long-run reported income is the same over an asset's life; the timing differs.

3. Forgetting the goodwill carve-out. Both standards prohibit goodwill reversal. An IFRS filer that hopes a recovering acquired business will restore a previous goodwill write-down will be disappointed. Goodwill once impaired stays impaired.

4. Missing the ceiling in IAS 36. The reversal cannot exceed what the carrying amount would have been with no prior impairment, less accumulated depreciation. An asset written down to $100m does not get written back to $500m just because fair value spiked; the ceiling contains it.

5. Mixing the rules for inventory and financial assets. Both IFRS and US GAAP permit reversal of certain inventory write-downs (within the same period's original cost, under specific conditions). The prohibition in ASC 360 and 350 is specifically about long-lived assets, indefinite-lived intangibles, and goodwill.

Frequently Asked Questions

Q: What is the GAAP vs IFRS impairment reversal difference in simple terms? Under IFRS, if a previously impaired asset recovers in value, the write-down can be partially or fully reversed through the income statement. Under US GAAP, write-downs on long-lived assets and indefinite-lived intangibles are permanent, the reduced value becomes the new cost basis and can only go down further, never back up.

Q: How does the impairment reversal difference affect investment decisions? During commodity price recoveries or industrial rebounds, IFRS companies will recognize income from reversals that GAAP companies cannot. This creates a structural earnings advantage for IFRS filers in cyclical sectors during up-cycles. Investors comparing earnings quality across the two regimes need to strip out reversals alongside original charges.

Q: What is a real-world example of the reversal difference? The copper plant in the worked example falls to $250 million after a $150 million write-down. Two years later it recovers. The IFRS filer writes the asset back up to $360 million (the ceiling), recording a $130 million gain. The GAAP filer reports no income from the recovery, the unrecognized $130 million of value will only appear when the plant is eventually sold.

Q: How can investors handle IFRS impairment reversals in financial models? Treat reversals the same as original impairments: non-recurring, non-cash, and excluded from normalized earnings. Track the reversal alongside the original write-down to understand the full lifecycle of the asset's book value. The economic value creation or destruction happened at the operational level, not in the accounting adjustment.

Q: How is the impairment reversal rule different for goodwill under both standards? Both IFRS and US GAAP prohibit reversal of goodwill impairment. Under IFRS, the prohibition applies because any recovered goodwill value is treated as internally generated goodwill, which cannot be recognized as an asset under IAS 38. Under GAAP, the prohibition is simply categorical. For all non-goodwill long-lived assets, the two standards diverge, only IFRS allows reversal.

Sources

1. IFRS Foundation. "IAS 36 Impairment of Assets." https://www.ifrs.org/issued-standards/list-of-standards/ias-36-impairment-of-assets/
2. FASB. "ASC 360, Property, Plant, and Equipment." https://asc.fasb.org/360/tableOfContent
3. FASB. "ASC 350, Intangibles - Goodwill and Other." https://asc.fasb.org/350/tableOfContent
4. KPMG. "Goodwill impairment: IFRS Accounting Standards vs US GAAP." https://kpmg.com/us/en/articles/2022/goodwill-impairment-ifrs-standards-us-gaap.html
5. Grant Thornton. "IAS 36 Reversing impairment losses." https://www.grantthornton.global/globalassets/1.-member-firms/global/insights/insight-content-blocks-and-media/ifrs/ias-36/12.-reversing-impairment-losses.pdf

Disclaimer

This article is educational content only and is not financial advice. Nothing here is a recommendation to buy, sell, or hold any security. Consult a licensed advisor before making investment decisions.