Depreciation, Amortization, and Impairment of Assets
- Graziano Stefanelli
- 22 hours ago
- 3 min read

Depreciation and amortization systematically allocate the cost of tangible and intangible assets over their useful lives.
Impairment reflects a permanent decline in the value of assets, requiring immediate write-downs to fair value.
Proper accounting for asset reduction ensures accurate reporting of asset values, expenses, and profitability under US GAAP and IFRS.
Failure to apply these concepts correctly leads to overstated assets, understated expenses, and misleading financial statements.
Overview / Definition
✦ Depreciation applies to tangible assets (e.g., machinery, vehicles, buildings) and spreads their cost over their useful lives.
✦ Amortization applies to intangible assets (e.g., patents, software licenses, trademarks), allocating their cost systematically.
✦ Impairment occurs when the carrying amount of an asset exceeds its recoverable amount, requiring an immediate write-down.
These methods are critical for matching expenses to the periods in which assets generate revenue, following the matching principle.
Recognition and Measurement
Depreciation Methods (Tangible Assets):
✦ Straight-Line Method: Equal expense each year.
✦ Declining Balance Method: Accelerated depreciation recognizing higher expense in earlier years.
✦ Units of Production Method: Based on actual usage or output.
Example – Straight-Line Depreciation:
Asset Cost: $50,000
Residual Value: $5,000
Useful Life: 5 years
Annual Depreciation = ($50,000 – $5,000) ÷ 5 = $9,000
Journal Entry:
debit Depreciation Expense – 9,000
credit Accumulated Depreciation – 9,000
Amortization Methods (Intangible Assets):
✦ Typically uses the straight-line method unless a better method reflects consumption of economic benefits.
✦ Intangible assets with indefinite lives (e.g., goodwill) are not amortized but tested for impairment annually.
Example – Amortization of a Patent:
Cost: $120,000
Useful Life: 10 years
Annual Amortization = $120,000 ÷ 10 = $12,000
Journal Entry:
debit Amortization Expense – 12,000
credit Accumulated Amortization – Patent – 12,000
Impairment of Assets:
✦ Under US GAAP (ASC 360) and IFRS (IAS 36), impairment testing is performed when indicators of impairment exist.
✦ For goodwill and indefinite-lived intangibles, impairment testing is performed at least annually.
Example – Impairment Calculation:
Carrying Amount of Equipment: $100,000
Recoverable Amount (Fair Value): $80,000
Impairment Loss = $100,000 – $80,000 = $20,000
Journal Entry:
debit Impairment Loss – 20,000
credit Accumulated Impairment – Equipment – 20,000
Journal Entry Examples
1. Depreciation Using Declining Balance (Double Declining, Year 1):
Asset Cost: $50,000, Useful Life: 5 years
Depreciation Rate = 2 × (1 ÷ 5) = 40%
First-Year Depreciation = $50,000 × 40% = $20,000
debit Depreciation Expense – 20,000
credit Accumulated Depreciation – 20,000
2. Impairment of Goodwill (Under IFRS):
Carrying Amount of Goodwill: $150,000
Recoverable Amount: $100,000
Impairment Loss = $50,000
debit Impairment Loss – 50,000
credit Goodwill – 50,000
Disclosure Requirements
Companies must disclose:
✦ The depreciation and amortization methods used and their useful life assumptions.
✦ The total amounts of depreciation, amortization, and impairment losses recognized during the period.
✦ The carrying amounts of tangible and intangible assets.
✦ Details of significant impairment tests, including assumptions and discount rates used.
Disclosures typically appear in the notes to the financial statements under the Assets and Expenses sections.
IFRS Comparison
Criteria | US GAAP | IFRS |
Depreciation Methods | Straight-Line, Accelerated | Similar Methods Allowed |
Amortization of Intangibles | Over Useful Life | Over Useful Life |
Goodwill Amortization | Not Allowed | Not Allowed |
Impairment Testing | Trigger-Based for Most Assets | Annual for Indefinite-Lived Assets |
Reversal of Impairment | Not Allowed | Allowed (Except for Goodwill) |
IFRS allows impairment reversals for certain assets (excluding goodwill), while US GAAP prohibits reversals of previously recognized impairments.
Common Errors
✦ Incorrect Useful Life Estimates: Leads to misstated depreciation and amortization expenses.
✦ Failing to Test for Impairment Timely: Results in overstated asset values and delayed recognition of losses.
✦ Using Inconsistent Depreciation Methods: Applying different methods for similar assets without valid justification.
✦ Recording Impairment Losses Incorrectly: Not reducing the correct asset values or misclassifying the impairment expense.
✦ Insufficient Disclosures: Failing to provide clear information about asset valuations, impairment testing, and assumptions used.