Depreciation — The Dollar Dictionary

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Accounting

Depreciation

The accounting method of spreading the cost of a physical asset over its useful life, rather than expensing it all at once.

There are several depreciation methods. Straight-line is the simplest: divide cost by useful life and deduct the same amount each year. Accelerated depreciation front-loads larger deductions in early years — useful for tax purposes, since it reduces taxable income faster. Companies get to choose their method (within accounting rules), which is why comparing depreciation policies between companies matters.

Crucially, depreciation is a non-cash expense. It reduces accounting profit but doesn't require any actual cash outflow. This is why accountants add depreciation back when calculating cash flow — it's a paper loss, not a real one.

The moment you drive a new car off the dealership lot, it loses roughly 10% of its value. By year five, it might be worth half what you paid. Depreciation is just the accounting system's way of recording that same reality — officially acknowledging that things wear out, age, and become less valuable over time.

Real world: Airlines are depreciation-heavy businesses. A Boeing 737 might cost $100 million. If the airline assumes a 25-year useful life, it depreciates the plane at $4 million per year on its income statement. This isn't cash leaving the bank — it's a non-cash accounting entry. But it dramatically affects reported profits, which is why investors always look at EBITDA (earnings before depreciation) to understand true cash generation.

💡 Depreciation is accounting's way of acknowledging that nothing lasts forever — it just does it slowly and tax-efficiently.

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