Depreciation, Amortization & Depletion (Income Statement) is a financial concept covered in this article. The Non-Cash Charges for Allocation of Long-Term Asset Costs
No asset is so good that it can't become a bad investment if bought at too high a price. And there are few assets so bad that they can't be a good investment when bought cheap enough.
Depreciation, Amortization, and Depletion (DA&D) on the income statement represent the systematic allocation of the cost of long-term assets over their useful lives. Depreciation applies to tangible fixed assets (PP&E), amortization to intangible assets, and depletion to natural resource assets. These are non-cash expenses that reduce reported earnings but do not involve cash outflows, making them key add-backs in cash flow analysis. Appearing in operating expenses (or sometimes cost of revenue), DA&D impacts operating income, margins, and tax shields while reflecting capital intensity and asset utilization.
What is Depreciation, Amortization & Depletion?
Depreciation, Amortization, and Depletion are accounting methods to allocate the historical cost of long-term assets over the periods they benefit.
Breakdown by Asset Type
- Depreciation: Tangible assets (buildings, machinery, vehicles)—wear and tear or usage
- Amortization: Intangible assets (patents, software, trademarks)—systematic write-off over useful life
- Depletion: Natural resources (oil, timber, minerals)—consumption of reserves
These are non-cash charges required under US GAAP (ASC 360/350/930) and IFRS (IAS 16/38/36). They reduce taxable income (tax shield) but are added back in cash flow from operations.
Often aggregated as ‘D&A’ in financial summaries; depletion is material only in extractive industries.
Common Calculation Methods
Methods vary by asset and company policy:
Key Methods
- Straight-Line: (Cost − Salvage) / Useful Life — most common for simplicity
- Declining Balance/Accelerated: Higher early expense (e.g., double-declining)
- Units of Production: Based on usage/output — ideal for machinery/resources
- Depletion: (Cost − Salvage) × (Units Extracted / Estimated Reserves)
Tip: Changes in estimates (life, salvage, reserves) are prospective—no prior period restatement.
“No asset is so good that it can’t become a bad investment if bought at too high a price. And there are few assets so bad that they can’t be a good investment when bought cheap enough.”
— Howard Marks, Co-Chairman, Oaktree Capital Management Oaktree Memo: ‘The Most Important Thing’ (2003)
Examples of DA&D Charges
Example 1: Depreciation (Straight-Line)
Factory equipment cost 1M, 10-year life.
Annual Depreciation = (1M) / 10 = $900K. Reported as operating expense (often in cost of revenue).
Example 2: Amortization
Acquired patent $5M, 8-year legal life.
Annual Amortization = 625K (straight-line, no salvage). Typically in operating expenses or SG&A.
Example 3: Depletion
Oil reserve cost $200M, estimated 10M barrels, 1M extracted this year.
Depletion = 20M. Usually in cost of revenue for extractive firms.
Higher DA&D reflects capital-intensive businesses; add back for EBITDA comparison.
Presentation in the Income Statement
DA&D typically appears as:
Common Locations
- Cost of Revenue (production-related depreciation/depletion)
- Operating Expenses (SG&A amortization, administrative depreciation)
- Separate line Depreciation & Amortization in detailed statements
- Aggregated in Total Operating Expenses
Reduces operating income; disclosed in footnotes with policy and breakdown.
Importance in Financial Analysis
DA&D is critical for:
- EBITDA calculation (add back non-cash)
- Assessing capital intensity (DA&D / Revenue)
- Estimating maintenance capex (often approximates depreciation)
- Evaluating tax shield benefits
High DA&D relative to peers indicates heavy fixed asset base; low may suggest underinvestment or asset-light model.
Warning: Aggressive useful life extensions reduce DA&D expense, inflating earnings—compare policies and asset age.