Inventory Write-Down and Reversal

When inventory loses value—due to obsolescence, price decline, or damage—both US GAAP and IFRS require a write-down to fair value. But the paths diverge sharply on recovery: US GAAP forbids reversal of the loss even if the inventory’s value recovers; IFRS permits reversal up to the original cost. This asymmetry affects both the integrity of balance sheets and year-to-year income volatility, making inventory accounting a key disclosure point for retail and manufacturing firms.

The lower-of-cost-or-market rule

Both GAAP and IFRS apply a lower-of-cost-or-market principle (IFRS calls it “lower of cost or net realisable value”). Inventory is recorded at cost; if its market value (or net realisable value) falls below cost, the firm must write it down.

Example: a retailer buys winter coats for $50 each and expects to sell them at $100, yielding $50 gross profit. It records inventory at cost: $50 per coat. If unseasonably warm weather arrives and demand collapses, the retailer must mark down coats to $35 each (the new realizable value). It records a write-down loss of $15 per coat on the income statement.

This write-down is mandatory under both regimes. It forces timely recognition that an asset has lost value, improving balance-sheet credibility and preventing inventory from being overstated.

The US GAAP no-reversal rule

Under US GAAP, once that $15 loss is recorded, it is permanent. If next season arrives and demand rebounds—say, the market for winter coats recovers and the retailer can now sell remaining coats at $80—GAAP does not permit reversal of the write-down. The coats stay on the balance sheet at $35. Any sale above $35 is recorded as a gain on sale in the period of sale, not as a reversal of the prior impairment.

This rule reflects conservatism: by prohibiting reversal, GAAP prevents firms from “smoothing” earnings by writing assets down in bad years and recovering the loss in good years. The downside is that the balance sheet, over time, carries “stale” valuations—assets permanently marked below fair value—and the income statement distorts comparative earnings between periods.

Example with numbers:

• Year 1: Coat inventory cost $100 (100 units × $1). Market falls to $0.70. Write-down loss of $30 (100 units × $0.30). Balance sheet: $70 inventory. Income statement: $30 loss.
• Year 2: Market recovers to $0.90. Retailer sells all 100 coats at $0.90 (revenue $90). Cost of goods sold is $70 (the written-down balance-sheet value). Gain on sale is $20. Income statement: $20 gain. But the original loss was $30, so net two-year impact is $10 loss.
• Under IFRS (see below), Year 2 would record a reversal of $20 (the write-down, back to original cost of $100), and the sale would show normal gross profit of $0.90 − $1.00 = −$0.10 per unit loss. Total two-year net: $20 reversal gain − $10 loss on sale = $10 net gain. The path differs, but ultimate economics are similar.

The IFRS reversal rule

IFRS takes the opposite tack: reversals are permitted. If the asset’s net realisable value increases, the firm must reverse the write-down (up to the original cost). The same coat inventory example:

• Year 1: Write-down of $30, balance sheet $70 inventory, income statement loss of $30 (same as GAAP).
• Year 2: Market recovers to $0.90, above the written-down $0.70. IFRS requires a reversal of $20 (the excess of $0.90 over $0.70, capped at the original $1.00 cost, so the recovery is $0.20 per unit). Balance sheet: inventory now $90. Income statement: $20 reversal gain. When the retailer sells, revenue is $90, COGS is $90, and gross profit is zero (or close, depending on selling costs).

The IFRS approach is more symmetric: losses and gains are both recognised as conditions change. The balance sheet can correct itself if value recovers. However, this introduces discretion: managers must estimate “net realisable value” each period, creating audit points and room for manipulation.

Income-statement and earnings-quality implications

The difference is most visible in highly cyclical industries. A semiconductor manufacturer with volatile chip prices experiences frequent write-downs and reversals under IFRS, but under GAAP, write-downs are sticky. Year-to-year earnings volatility is higher under IFRS in these sectors.

For retailers and apparel firms (highly exposed to inventory impairment), the accounting choice matters. A fashion retailer under GAAP will see inventory whipsawed by seasonal obsolescence—a big write-down when last season’s stock doesn’t sell, but no reversal even if the trend reverses. Under IFRS, reversals smooth the damage across periods.

This is why disclosures matter: auditors and analysts must closely scrutinise inventory footnotes to understand the magnitude of write-downs, the pace of reversals (IFRS), and trends in obsolescence. A spike in write-downs might signal either a genuine demand shock or excessive prior-year overvaluation.

Worked example: retail fashion brand

Assume a brand buys summer dresses:

• Cost: $10 per dress
• Expected selling price: $25 per dress
• Units: 1,000 dresses
• Initial inventory balance: $10,000

Mid-season, demand disappoints; price holds at $12:

• Net realisable value: $12 per dress
• Write-down: ($10 − $12) × 1,000 = … wait, this is wrong. Write-down is ($10 − $12)? No. Cost is $10, market is $12, so cost is lower. No write-down.

Let me redo:

• Cost: $10 per dress
• Market price falls to $8 (oversupply)
• Net realisable value: $8
• Write-down: ($10 − $8) × 1,000 = $2,000
• New balance-sheet value: $8,000
• Income statement hit: $2,000 loss

Next quarter, demand strengthens, and net realisable value recovers to $9.50:

• GAAP: No reversal. Inventory stays at $8,000. If dresses sell at $9.50, revenue is $9,500, COGS is $8,000, gross profit is $1,500.
• IFRS: Reversal of ($9.50 − $8.00) × 1,000 = $1,500. Inventory now $9,500. If dresses sell at $9.50, revenue is $9,500, COGS is $9,500, gross profit is zero.

Over two periods:

• GAAP: Loss of $2,000 then profit of $1,500 = net $500 loss. Balance sheet had $8,000; now zero.
• IFRS: Loss of $2,000, reversal gain of $1,500, then zero gross margin on sale = net $500 loss. But the path is cleaner: inventory flows back to cost.

Both systems yield the same bottom-line two-year total ($500 loss), but the timing and balance-sheet story differ.

Disclosure and audit focus

SEC-filed (GAAP) companies must disclose material inventory write-downs in MD&A. For example, a retailer might state: “We recorded $50 million of inventory write-downs in Q2 related to excess seasonal merchandise. No reversals were recorded.” Investors reading this understand that if value recovers later, there will be no offset; the loss is locked in.

IFRS filers disclose reversals separately and more explicitly. A company might note: “We reversed $15 million of prior-period impairments on consumer electronics inventory following a recovery in market prices.” This signals value has genuinely recovered and the asset is now “fair-valued” again.

Auditors scrutinise both standards rigorously. Under GAAP, the audit focus is on whether a write-down was taken (was the trigger met?); under IFRS, both direction and magnitude of revaluation matter. IFRS reversals must be supported by external evidence—price quotes, market reports, customer demand—not just management assertion.

Convergence efforts and practical implications

The IFRS and GAAP rules have remained unaligned for decades. The Financial Accounting Standards Board (FASB) has considered convergence but has resisted moving GAAP toward IFRS-style reversals, citing conservatism and comparability concerns. Multinational firms must track inventory under both regimes if they report to both US and international audiences.

In practice, the difference rarely derails valuation but is a consistent source of earnings adjustments. Analysts comparing a GAAP retailer to an IFRS competitor will often restate both to an equivalent basis—either locking in all write-downs (GAAP-style) or allowing reversals (IFRS-style)—to make comparisons cleaner.

See also