Depreciation on Fixed Assets

Companies depreciate fixed assets to allocate the cost of tangible assets over their useful lifespan, matching expenses to the revenues they generate. Depreciation ensures financial statements accurately reflect an asset's declining value due to usage, wear and tear, and technological advancements, presenting a realistic picture of the company's financial health.

The three main depreciation methods are the straight-line method, the written-down-value method, and the units of production method. Most companies apply a single depreciation method consistently to all their assets, though different approaches are often specific to certain industries based on how assets are used and their value decline patterns.

Depreciation systematically spreads an asset's cost over its useful life, aligning expenses with the periods the asset generates revenue. For example, a delivery truck purchased for five years of use has its cost distributed across those five years, ensuring each year's financial statements reflect the portion of the truck's cost that contributed to that year's revenue.

Fixed assets lose value due to three primary factors: time, wear and tear from daily usage, and technological changes. As assets are used in operations, they deteriorate physically, and newer, more efficient models become available in the market, reducing the value of older equipment.

The units of production method bases depreciation on actual asset usage rather than time. This approach calculates depreciation expense according to how many units an asset produces or how much work it performs, making it ideal for assets whose value decline correlates directly with production output rather than calendar years.

Useful life estimation determines how long an asset will provide economic benefits to a company, directly affecting depreciation calculations. For instance, if a bakery estimates an oven's useful life at five years, the oven's cost is allocated over that five-year period, influencing the annual depreciation expense and the asset's book value on financial statements.

Different industries use different depreciation methods because assets depreciate at varying rates depending on usage patterns and value decline characteristics. The written-down-value method may suit assets that lose value quickly initially, while the units of production method works better for assets whose depreciation correlates with actual output rather than time.