Full Definition
Depreciation is the systematic allocation of a tangible asset's cost over its estimated useful life. Property, plant, and equipment—machinery, vehicles, computers, building improvements—are depreciated under methods including straight-line (equal charges each period), declining balance (front-loaded charges), or units-of-production (charges tied to actual usage). The useful life assumptions significantly affect period-by-period expense: a machine depreciated over 5 years generates $200K annual depreciation charge on a $1M cost, versus $100K if depreciated over 10 years. These accounting estimates require management judgment and are scrutinized during audits. Amortization applies to intangible assets with finite useful lives: patents, customer relationships, developed technology, non-compete agreements, and capitalized software development costs. Intangible assets identified in purchase price allocations are amortized over their estimated useful lives—3–7 years for technology, 7–15 years for customer relationships, and indefinite life (subject to impairment testing only) for certain trade names. Capitalized internal software development costs under ASC 350-40 are typically amortized over 2–5 years once the software reaches general availability. In EBITDA calculations, both D&A are added back to operating income, removing their effect on the primary operating performance metric. This treatment is appropriate when D&A reflects historical purchase accounting charges (particularly PPA amortization) that do not represent future cash requirements. However, when depreciation closely approximates the actual maintenance capital expenditure required to sustain the asset base, adding it back can overstate true cash-generative capacity—the core critique of EBITDA as a cash flow proxy. Analysts resolve this tension by calculating maintenance CapEx separately and comparing it to depreciation: significant divergence (capex much higher than depreciation) signals that EBITDA is overstating free cash flow.
FAQs
Why is amortization from acquisitions different from depreciation of owned assets?
Acquisition amortization arises from purchase price allocations and represents the write-off of the premium paid for intangible assets—it is a non-cash accounting charge with no future cash consequence. By contrast, depreciation of PP&E approximates the eventual cash requirement to replace or refurbish the assets when they wear out. This is why investors add back all D&A in PE contexts (where PPA amortization is substantial) but may adjust for maintenance capex requirements when assessing true free cash generation.
What is accelerated depreciation and why might a company choose it?
Accelerated depreciation methods (declining balance, sum-of-years-digits) front-load the expense—recognizing more depreciation in early years and less in later years. Companies often use accelerated depreciation for tax purposes because it reduces taxable income earlier, improving near-term cash flow through tax deferral. For financial reporting, straight-line is more common as it produces smoother reported earnings. The choice of depreciation method for each purpose is independent under GAAP.
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