Technical merger déficit (mali technique): definition, calculation and accounting treatment

Updated April 2026 - The technical merger déficit, known in French as the mali technique, is one of the most misunderstood concepts in French merger accounting. It is not an economic loss. It is a technical gap reflecting unrealised latent gains on the assets of the absorbed company that were never revalued on its books. For M&A professionals, PE investors, and CFOs involved in French company mergers, mastering this concept is essential for sound accounting treatment and tax compliance.

Also read Deferral of taxation on a share contribution, TUP: universal transfer of assets and liabilities and Business transfers.

The technical merger déficit arises in the books of the absorbing company (société absorbante) when it cancels its shareholding in the absorbed company (société absorbée) upon completion of the merger. It equals the difference between:

• the acquisition cost of the shares in the absorbed company (what was paid to acquire the stake), and
• the net book value of the absorbed company's assets and liabilities at the merger date.

This gap exists because the assets transferred are recorded at their historical net book value, while the price originally paid incorporated latent appreciation: unrecorded goodwill, undervalued fixed assets, customer relationships, brands and patents. The technical merger déficit therefore represents a latent economic value that accounting rules require to be tracked separately.

The legal framework governing this treatment has evolved: the CRC regulation 2004-01 has been superseded by ANC standards (ANC regulation 2015-06 and subsequent updates) which now govern mergers and equivalent transactions in France.

Two distinct components can arise in a French merger, and confusing them leads to serious accounting and tax errors.

The technical déficit (mali technique) corresponds to the portion of the total gap that is attributable to identifiable latent gains on the absorbed company's assets. Goodwill, trademarks, property, plant and equipment — assets whose fair value exceeds net book value. This component is justified economically and is capitalised as an intangible asset.

The true merger loss (mali réel or mali vrai) corresponds to the residual gap that cannot be explained by any identifiable latent value. It reflects a real economic loss: the shareholding was overvalued at the time of acquisition. This component must be provisioned or written off.

The distinction is fundamental because the accounting and tax treatment diverges completely between the two components.

Step 1: calculate the total merger gap#

Total gap = Acquisition cost of shares in the absorbed company - Net book value of the absorbed company

Worked example:

• Acquisition cost of shares in subsidiary BETA: €2,000,000
• Net book value of BETA at merger date: €800,000
• Total gap = €2,000,000 - €800,000 = €1,200,000

Step 2: allocate the technical déficit to underlying assets#

Identify the latent gains on identifiable assets of the absorbed company:

• Goodwill (assessed by an independent expert): latent gain of €600,000
• Industrial equipment (fair value exceeds net book value): latent gain of €200,000
• Total identifiable latent gains: €800,000

In our example, out of a total gap of €1,200,000:

• Technical déficit (allocable to assets): €800,000
• True merger loss (non-allocable): €400,000 → must be provisioned

Step 3: treat the true merger loss#

The true loss of €400,000 does not represent recoverable value. A provision for impairment should be recognised if the conditions under Article 39-1-5° of the French Tax Code (CGI) are met.

Balance sheet recognition#

The technical merger déficit is recorded in account 207 "Mali technique de fusion" (a specific sub-account under intangible assets or financial assets, depending on the ANC standards applied). It appears on the asset side of the absorbing company's balance sheet.

Allocation schedule#

Under ANC standards, the technical déficit must be formally allocated across the underlying assets in a mali allocation schedule appended to the merger treaty. Each asset receives its share of the déficit proportional to its identified latent gain.

Amortisation rules#

The déficit is amortised over the remaining useful life of the underlying assets:

• Allocated to depreciable fixed assets → amortised over their remaining life
• Allocated to goodwill (not systematically amortisable under French GAAP) → subject to annual impairment testing, with no systematic amortisation
• Allocated to a building → amortised over the remaining depreciation schedule

The technical déficit is not directly tax-déductible (Article 38 quinquies of Annex III to the CGI). Capitalising it does not in itself create a tax deduction.

However, the accounting depreciation charged on the portion of the déficit allocated to depreciable assets may be tax-déductible, to the extent that the depreciation would have been allowable had those assets been recognised at fair value directly on the balance sheet.

The true merger loss does not generate an immediate deduction either. A provision may be tax-déductible if the criteria of Article 39-1-5° CGI are satisfied (probable and well-defined loss).

The allocation of the technical déficit requires a fair value assessment of the absorbed company's underlying assets. In France, this is typically performed by or in conjunction with the commissaire à la fusion (merger auditor) or commissaire aux apports (contribution auditor), depending on the structure.

The auditor's report validates:

• the fair value of the transferred assets
• the consistency of the déficit allocation
• compliance with applicable ANC standards

Without this report — or where the valuation is insufficiently documented — the accounting treatment becomes vulnerable to challenge by tax authorities or statutory auditors.

When the carrying value of the shareholding in the absorbed company is lower than its net book value at merger date, the absorbing company recognises a boni de fusion (merger surplus). This is the mirror image of the mali.

The merger surplus is credited to the income statement as an extraordinary income item. Its tax treatment depends on the régime elected (standard tax treatment or the favourable merger régime under Article 210 A CGI), and it may be partially exempt from corporate income tax under certain tax-neutral restructuring schemes.

Hayot Expertise insight: the documentation of the mali technique is as important as the calculation itself. An incomplete or informal allocation schedule exposes the absorbing company to an accounting challenge or a tax reassessment. We strongly recommend preparing this file before filing the merger treaty.

Structure: Company ALPHA absorbs its wholly owned subsidiary BETA.

• Acquisition cost of BETA shares (acquired 3 years ago): €1,500,000
• BETA's net book value at merger date: €600,000
• Total gap: €900,000

Fair value analysis of BETA's assets:

• BETA's goodwill (valued by independent expert): latent gain of €500,000
• Industrial equipment (fair value > net book value): latent gain of €200,000
• Total technical déficit allocated: €700,000
• Residual true merger loss: €200,000 → provision for impairment

Accounting entries at ALPHA:

• Débit account 207 "Mali technique de fusion": €700,000
• Provision for impairment on true merger loss: €200,000
• Amortisation of déficit allocated to equipment: over 3 remaining years (€66,667/year)
• Déficit allocated to goodwill: annual impairment test

The technical merger déficit in French accounting is a concept at the intersection of asset valuation, accounting standards, and restructuring tax law. Handling it correctly requires rigorous pre-merger analysis, a formally documented allocation, and structured accounting follow-up until the underlying assets are amortised or disposed of. In 2026, the requirements of ANC standards and the increasing scrutiny of tax authorities on restructuring transactions make this rigour essential for any French merger.

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(Official sources: CRC regulation 2004-01, ANC standards, Article 38 quinquies Annex III CGI, published on Légifrance)