IFRS 3 vs ASC 805: PPA Standards Compared
Key differences between IFRS 3 and ASC 805 purchase price allocation. Recognition rules, measurement, goodwill, and contingent consideration.
Introduction
IFRS 3 and ASC 805 are the two dominant accounting standards governing how companies allocate the purchase price in a business combination. Issued by the IASB and FASB respectively, these standards share a common objective: ensuring that acquired intangible assets are recognised at fair value and that goodwill reflects only the residual premium.
The standards were substantially converged following the 2008 joint revision project, yet important differences remain. These differences affect the amount of goodwill recognised, the treatment of contingent consideration, the measurement of non-controlling interests, and the ongoing impairment testing regime. For cross-border transactions and dual-listed companies, understanding these divergences is not optional — it is essential.
This comparison is written for practitioners navigating PPA engagements where the reporting framework matters to the valuation outcome.
Core Framework: Where the Standards Align
Both standards share the same foundational principles:
Acquisition method required. Both IFRS 3 and ASC 805 mandate the acquisition method (formerly called the purchase method). The acquirer must identify the acquisition date, determine the consideration transferred, and allocate the purchase price to identifiable assets and liabilities at fair value.
Fair value measurement. Both standards require acquired intangible assets to be recognised at fair value. Both reference their respective fair value measurement standards (IFRS 13 and ASC 820) for guidance on how fair value should be determined.
Recognition criteria. Both use the same two-pronged test: an intangible asset acquired in a business combination must be recognised separately from goodwill if it meets either the contractual-legal criterion or the separability criterion.
Measurement period. Both allow a measurement period of up to 12 months from the acquisition date to finalise the provisional purchase price allocation.
The convergence project was largely successful — the core recognition and measurement framework is substantially aligned. The remaining differences, while important, are at the edges rather than the foundation.
Key Differences
Contingent consideration
Once classified, the two standards measure it the same way; the divergence is in the classification criteria:
| Aspect | IFRS 3 | ASC 805 |
|---|---|---|
| Classification | Financial liability or equity under IAS 32 (IFRS 3 paragraph 40); a right to the return of consideration is an asset | Liability, equity or asset, under ASC 480 and ASC 815-40 |
| Remeasurement | Liability-classified: remeasured at fair value each period through P&L. Equity-classified: not remeasured; settlement within equity (IFRS 3 paragraph 58) | Liability-classified: remeasured at fair value through P&L. Equity-classified: not remeasured |
| Impact | Earn-outs settled in cash or a variable number of shares are liabilities, so their fair value changes hit the income statement | Same outcome for liability-classified earn-outs; equity classification avoids post-acquisition P&L impact |
Under both standards, contingent consideration arrangements based on future performance metrics (e.g., earn-outs) are usually liabilities and are remeasured at fair value through profit or loss. Where an arrangement meets the equity classification criteria, it is measured at its acquisition-date fair value and not remeasured. Because IAS 32 and ASC 480/815-40 do not always reach the same classification, the same earn-out can be equity under one framework and a liability under the other.
Non-controlling interests (NCI)
| Aspect | IFRS 3 | ASC 805 |
|---|---|---|
| Measurement choice | Full goodwill method OR proportionate share method (election per transaction) | Full goodwill method required |
| Impact on goodwill | Proportionate method produces lower goodwill | Full goodwill is always recognised |
The NCI measurement choice under IFRS 3 can meaningfully affect the amount of goodwill recognised. A 70% acquisition under the proportionate method recognises only the parent's goodwill; the full goodwill method adds the goodwill attributable to the NCI, measured from the NCI's own fair value. That fair value often carries a discount for lack of control (IFRS 3 paragraph B45), so full goodwill is not simply partial goodwill grossed up pro rata to 100%. The choice also shapes impairment testing: under the proportionate method, IAS 36 Appendix C notionally grosses up the goodwill for the test and recognises only the parent's share of any goodwill loss.
Goodwill impairment testing
| Aspect | IFRS 3 / IAS 36 | ASC 805 / ASC 350 |
|---|---|---|
| Testing level | Cash-generating unit (CGU) or group of CGUs | Reporting unit |
| Methodology | Compare recoverable amount (higher of fair value less costs of disposal and value in use) to carrying value | Compare fair value of reporting unit to carrying amount |
| Qualitative screen | Not available | Optional qualitative assessment before quantitative test |
| Impairment reversal | Prohibited for goodwill | Prohibited for goodwill |
Bargain purchases (negative goodwill)
Both standards require a reassessment of all identified assets and liabilities before recognising a bargain purchase gain. Both recognise the gain immediately in profit or loss. The mechanics are substantially aligned.
Research and development acquired
| Aspect | IFRS 3 | ASC 805 |
|---|---|---|
| In-process R&D | Recognised as an intangible asset at fair value | Recognised as an intangible asset at fair value |
| Subsequent treatment | Accounted for under IAS 38 (capitalise development costs if criteria met; expense research) | Accounted for under ASC 730/ASC 350 (different rules for software vs other R&D) |
Comprehensive Comparison Table
Full comparison of key provisions
| Provision | IFRS 3 | ASC 805 |
|---|---|---|
| Issuing body | IASB | FASB |
| Jurisdiction | 140+ countries (UK, EU, Australia) | United States |
| Recognition test | Contractual-legal OR separable | Contractual-legal OR separable |
| Fair value framework | IFRS 13 | ASC 820 |
| Contingent consideration | Classified under IAS 32; liability remeasured at FV through P&L, equity not remeasured | Classified under ASC 480/815-40; liability remeasured at FV through P&L, equity not remeasured |
| NCI measurement | Choice: full or proportionate | Full goodwill only |
| Goodwill impairment | One-step (IAS 36) at CGU level | One-step (ASC 350) at reporting unit |
| Qualitative impairment screen | Not available | Available (Step 0) |
| Measurement period | Up to 12 months | Up to 12 months |
| Bargain purchase | Gain in P&L after reassessment | Gain in P&L after reassessment |
| Acquired IPR&D | Intangible asset (IAS 38 rules) | Intangible asset (ASC 730/350 rules) |
IFRS 3 Distinctive Features
- NCI proportionate method available (lower goodwill)
- Contingent consideration classified under IAS 32 (earn-outs usually liabilities, remeasured through P&L)
- No qualitative screen for goodwill impairment
- Impairment testing at CGU level (potentially smaller units)
ASC 805 Distinctive Features
- Full goodwill method required (higher goodwill balance)
- Contingent consideration classified under ASC 480/815-40 (equity-classified not remeasured)
- Optional qualitative impairment screen (Step 0)
- Impairment testing at reporting unit level
Practical Implications for Cross-Border Deals
Scenario: UK company acquires US target
A UK-listed company reporting under IFRS acquires a US subsidiary. The PPA is performed under IFRS 3 for the group accounts. Key considerations:
- NCI measurement choice — the UK parent can elect the proportionate method, recognising less goodwill than US GAAP would require
- Contingent earn-out — classified under IAS 32 for the group accounts, so an arrangement that is equity under US GAAP may be a liability remeasured through P&L under IFRS, or the reverse
- The US subsidiary may also need a PPA for local US GAAP statutory accounts under ASC 805 — potentially producing different intangible asset and goodwill balances
Scenario: US company acquires UK target
A US-listed company must apply ASC 805. The full goodwill method applies regardless of ownership percentage, and the qualitative impairment screen is available for ongoing testing.
Illustrative figures only: if the NCI's fair value exceeds its proportionate share of the identifiable net assets by £12 million, goodwill under ASC 805 (full goodwill) is £12 million higher than under the IFRS 3 proportionate method on the same deal. That difference, the goodwill attributable to the NCI, carries through to impairment testing and to the acquirer's reported return on assets.
Emerging Developments
Both standard-setters are considering reforms:
- IASB Goodwill and Impairment project — enhanced disclosure requirements for business combinations and changes to the impairment test (exposure draft ED/2024/1, March 2024); the IASB decided in November 2022 not to reintroduce goodwill amortisation
- FASB ASU on goodwill — issued ASU 2017-04 simplifying the impairment test; removed its goodwill amortisation project from its agenda in June 2022, and in July 2026 decided to pursue targeted improvements to the level and frequency of goodwill impairment testing
- Convergence outlook — further convergence appears unlikely in the near term as both boards focus on separate agendas
Decision Framework for Practitioners
1. Determine the reporting framework
The acquirer's reporting framework determines which standard applies. For dual-listed companies, both may apply to different reporting requirements.
2. Identify divergence points early
Map the key differences (contingent consideration, NCI, impairment) against the specific deal structure to understand where outcomes will differ.
3. Model both scenarios for cross-border deals
When both IFRS and US GAAP reporting are needed, run parallel PPA models and reconcile the differences for management and board communication.
4. Document the basis of preparation
Clearly state which standard was applied, which elections were made (NCI method under IFRS 3), and how contingent consideration was classified.
Conclusion
IFRS 3 and ASC 805 are more alike than different — the core recognition and fair value measurement framework is substantially converged. The meaningful differences lie in contingent consideration treatment, NCI measurement options, and goodwill impairment mechanics. Practitioners working on cross-border transactions must understand both standards and model the impact of divergence on reported goodwill and future P&L.
For the related comparison of ongoing intangible asset accounting, see IAS 38 vs ASC 350. For UK-specific considerations, explore FRS 102 vs IFRS. The Academy lesson on Accounting Standards provides the full educational context.
The Bottom Line
The standards are converged on fundamentals but diverge on details that can materially affect reported goodwill and earnings. For cross-border M&A, understanding these differences is not academic — it directly affects the acquirer's balance sheet, impairment exposure, and post-deal earnings profile.
Related Glossary Terms
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