What is US GAAP and how does it differ from IFRS?

US GAAP (Generally Accepted Accounting Principles) is the authoritative financial reporting framework issued by the FASB (Financial Accounting Standards Board) and codified in the FASB ASC; it differs fundamentally from IFRS in recognition thresholds, measurement bases, and presentation requirements, making year-end reconciliation and dual-reporting mandatory for multinational entities. What is US GAAP? A Complete Guide begins with understanding that US GAAP is principles-based but rules-heavy, whereas IFRS is more principles-based with greater judgment. Key structural differences: - Revenue Recognition: Under ASC 606, revenue is recognized when control of promised goods or services transfers to the customer (ASC 606-10-25-1). IFRS 15 uses identical language, but US GAAP provides more implementation guidance and carve-outs (e.g., ASC 606-10-15-2 for contract modifications). Practitioners applying US GAAP must use the five-step model with extensive bright-line tests. - Lease Accounting: ASC 842 requires lessees to recognize right-of-use (ROU) assets and lease liabilities on the balance sheet for most leases (ASC 842-20-25-1), mirroring IFRS 16. However, US GAAP permits the practical expedient to not reassess lease classification for short-term leases under 12 months (ASC 842-20-25-7), while IFRS allows reassessment only in narrow circumstances. - Business Combinations: ASC 805 mandates acquisition accounting with goodwill measured as residual consideration; IFRS 3 is largely aligned but permits alternative measurement of non-controlling interests at fair value or proportionate share (ASC 805-20-30-1 vs. IFRS 3 para 32). US GAAP does not permit the latter.

How does US GAAP's two-step impairment model for PP&E (ASC 360) differ materially from IFRS in cash flow projections and discount rate assumptions?

- Impairment Testing: ASC 360 (property, plant, equipment) and ASC 350 (intangibles) use a two-step impairment model (recoverability test, then loss measurement), while IAS 36 uses a one-step approach comparing carrying value to recoverable amount (ASC 360-10-35-19). This creates material differences in timing and quantum of impairment charges. - Development Costs: ASC 730 capitalizes software development costs once technological feasibility is established (ASC 730-10-25-1); IAS 38 capitalizes development costs once technical and commercial feasibility criteria are met, resulting in earlier capitalization under IFRS in many IT projects. - Presentation and Disclosure: ASC 210 (balance sheet) requires classification into current/non-current assets and liabilities; IFRS allows liquidity-based presentation in certain industries. Segment reporting under ASC 280 uses the management approach but requires quantitative thresholds (10% of revenue/profit/assets); IFRS 8 mirrors this but with less prescriptive guidance (ASC 280-10-50-1). A US-traded company acquires an intangible software asset for $5M cash with an expected useful life of 5 years. Year 1 revenue impact differs under US GAAP and IFRS due to amortization method availability and impairment triggers. | Account | Dr | Cr | |---|---|---| | Intangible Asset – Software | 5,000,000 | | | Cash | | 5,000,000 |

What is the audit risk when applying the ASC 842-20-25-7 short-term lease practical expedient to leases with renewal options?

Year 1 amortization (straight-line, 5 years): $1,000,000. | Amortization Expense | 1,000,000 | | |---|---|---| | Accumulated Amortization – Software | | 1,000,000 | Impairment testing: If undiscounted future cash flows ($3.8M) fall below carrying value ($4.0M), a two-step impairment loss is recognized (ASC 360-10-35-19). Identical initial recognition ($5M). However, IFRS permits revaluation to fair value post-acquisition if an active market exists (IAS 38.75), whereas US GAAP prohibits upward revaluation of intangibles (ASC 350-20-35-2). Year 1 amortization is $1.0M (same). Impairment uses one-step recoverable amount model (fair value less costs to sell, or value in use). If recoverable amount is $3.9M, impairment loss is $0.1M—potentially lower than US GAAP depending on discount rate assumptions. Net Impact: A $100k–$500k difference in Year 1 pre-tax income and balance sheet carrying values, requiring full reconciliation in footnote disclosures.

Under ASC 606-10-25-1, how should control transfer be assessed when the contract includes both acceptance clauses and performance obligations over time?

- Lease Classification Errors: Practitioners misapply ASC 842 practical expedients, especially the 12-month short-term lease exemption (ASC 842-20-25-7), by not measuring the lease term correctly (including renewal options the lessee is reasonably certain to exercise). This results in unrecorded ROU assets and lease liabilities. - Revenue Recognition Timing: Under ASC 606-10-25-1, control transfer is frequently misjudged in contracts with acceptance clauses or performance obligations spread over time. Auditors often find revenue recognized too early when customer acceptance is a genuine condition precedent, not merely administrative. - Goodwill Impairment Understatement: ASC 350-20-35-3 requires annual goodwill impairment testing using a single-step model (fair value vs. carrying value). Many entities defer testing or use stale projections, missing declines in fair value that trigger impairment under Step 1 (no Step 2 recoverability hurdle as in property/plant equipment). - ASC 606-10-25-1: Revenue recognition control transfer principle. - ASC 842-20-25-1: Right-of-use asset and lease liability recognition. - ASC 350-20-35-3: Goodwill impairment single-step test. - ASC 805-20-30-1: Business combination acquisition accounting and goodwill measurement. - ASC 360-10-35-19: Long-lived asset impairment recoverability and measurement. - ASC 280-10-50-1: Segment reporting quantitative thresholds (10% tests).

What is US GAAP? A Complete Guide

What is US GAAP — Core Rule

US GAAP (Generally Accepted Accounting Principles) is the authoritative financial reporting framework issued by the FASB (Financial Accounting Standards Board) and codified in the FASB ASC; it differs fundamentally from IFRS in recognition thresholds, measurement bases, and presentation requirements, making year-end reconciliation and dual-reporting mandatory for multinational entities.

How What is US GAAP Works

What is US GAAP? A Complete Guide begins with understanding that US GAAP is principles-based but rules-heavy, whereas IFRS is more principles-based with greater judgment. Key structural differences: