The lower-of-cost principle: Niederstwertprinzip under HGB

Prudence and the historical-cost ceiling

German valuation is anchored in the prudence principle (Vorsichtsprinzip, § 252 Abs. 1 Nr. 4 HGB) and its offshoot the imparity principle: unrealised losses must be recognised, while unrealised gains must not. Assets are capped at their acquisition or production cost (§ 253 Abs. 1); there is no upward fair-value revaluation for most assets, which is a defining contrast with IFRS.

The Niederstwertprinzip is how the prudence principle bites on the asset side. When the value that can be attributed to an asset at the balance-sheet date falls below its carrying amount, HGB requires — or in some cases permits — a write-down to that lower value. The strictness of that requirement depends on whether the asset is fixed or current.

Fixed assets: moderate lower-of-cost

For fixed assets (Anlagevermögen), § 253 Abs. 3 HGB applies the moderate lower-of-cost principle (gemildertes Niederstwertprinzip). Beyond the ordinary planned depreciation, an extraordinary write-down (außerplanmäßige Abschreibung) is required only where the impairment is expected to be permanent (voraussichtlich dauernde Wertminderung). A temporary dip does not force a write-down.

There is one exception: for financial fixed assets (Finanzanlagen), HGB allows a write-down even when the impairment is only temporary, giving management an option rather than a duty in that narrow case.

Current assets: strict lower-of-cost

For current assets (Umlaufvermögen) — inventories, receivables, securities held short term — § 253 Abs. 4 HGB applies the strict lower-of-cost-or-market principle (strenges Niederstwertprinzip). Here any lower value at the balance-sheet date, whether the decline is permanent or merely temporary, must be written down to. There is no permanence test to clear.

The strict rule reflects the fact that current assets are close to being realised in cash: if their market or realisable value has dropped, the loss is treated as effectively unavoidable and recognised at once. This is prudence at its most uncompromising.

Strict vs moderate at a glance

Reversals (Wertaufholung)

German GAAP does not let a write-down linger once its cause is gone. § 253 Abs. 5 HGB requires a write-up (Wertaufholung) when the reasons for an earlier extraordinary write-down no longer apply — a reversal duty (Wertaufholungsgebot), not an option. The ceiling is the asset's amortised cost: you may restore value up to what the carrying amount would have been without the write-down, never above original cost.

The single carve-out is goodwill (Geschäfts- oder Firmenwert): once written down it stays down, because a recovery in a company's goodwill cannot reliably be traced to the original acquisition. Everywhere else, the interplay of write-down and reversal keeps carrying values in step with the underlying economics while the historical-cost ceiling holds.

Frequently asked questions

What is the Niederstwertprinzip?

The Niederstwertprinzip is the German lower-of-cost principle: an asset must be written down when its attributable value at the balance-sheet date falls below its carrying amount. It comes in a strict form for current assets (§ 253 Abs. 4 HGB) and a moderate form for fixed assets (§ 253 Abs. 3), and flows from the prudence principle.

What is the difference between strict and moderate lower-of-cost?

For current assets the strict principle (§ 253 Abs. 4) requires a write-down to any lower value, whether the decline is permanent or temporary. For fixed assets the moderate principle (§ 253 Abs. 3) requires an extraordinary write-down only when the impairment is expected to be permanent, with a temporary-decline option for financial fixed assets.

Are write-downs reversed under HGB?

Yes. Under § 253 Abs. 5 HGB, if the reasons for an earlier extraordinary write-down cease to apply, the company must write the asset back up (Wertaufholung) to at most its amortised cost. The reversal is mandatory, not optional. Goodwill is the only exception — its write-down may never be reversed.

How does this differ from IFRS?

HGB caps assets at historical cost and only writes them down, never up above cost, in line with the prudence principle. IFRS permits fair-value measurement and revaluation of certain assets above cost. So HGB recognises unrealised losses but not unrealised gains, whereas IFRS is more willing to reflect current values on the upside.

Can goodwill be written back up after impairment?

No. Under § 253 Abs. 5 Satz 2 HGB the general reversal duty does not apply to goodwill (Geschäfts- oder Firmenwert). Once goodwill has been written down, the reduced value stands even if the business recovers, because the recovery cannot reliably be attributed to the original acquisition.