1. The Core Goodwill Calculation
Goodwill is calculated on the acquisition date as a structural residual formula:
Goodwill = (Consideration Transferred + Fair Value of NCI + Fair Value of Previously Held Equity) − Net Fair Value of Identifiable Assets Acquired
  • Bargain Purchase Gain: If the net fair value of identifiable assets acquired exceeds the sum of consideration, NCI, and previously held equity, the transaction is a bargain purchase. The acquirer must reassess all values. If the surplus remains, it is recognized immediately as a gain on bargain purchase in profit or loss.

2. Valuation Options for Non-Controlling Interest (NCI)
The valuation of NCI highlights a key structural choice where IFRS provides an option that US GAAP prohibits:
┌───────────────────────────────────┬───────────────────────────────────┐
│ IFRS 3 NCI Valuation Options      │ US GAAP ASC 805 Mandated Track    │
├───────────────────────────────────┼───────────────────────────────────┤
│ Option A: Full Goodwill Method    │ • ONLY the Full Goodwill Method   │
│ (Fair Value Method)               │   is permitted.                   │
│                                   │                                   │
│ Option B: Partial Goodwill Method │ • Prohibited under US GAAP.       │
│ (Proportionate Net Asset Method)  │                                   │
└───────────────────────────────────┴───────────────────────────────────┘

  • Full Goodwill Method: NCI is measured at fair value (typically based on the market price of the acquiree’s shares). Goodwill is calculated for the entire entity, with a portion allocated to both the parent and the NCI.
  • Partial Goodwill Method (IFRS Only): NCI is measured at its proportionate share of the acquiree’s identifiable net assets. Goodwill is calculated only for the parent company’s share of the acquisition; no goodwill is allocated to the NCI balance sheet account. 

 
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