What does "depreciation" refer to under GAAP?

• A. The increase in an asset's market value over time
• B. The allocation of a tangible asset's cost over its useful life
• C. The full expense deducted at the time of purchase
• D. The process of revaluating assets annually

Answer: (B)

Depreciation under GAAP refers to the systematic allocation of the cost of a tangible asset over its useful life. This accounting method recognizes that tangible assets, such as machinery, buildings, and equipment, lose value as they are used over time due to wear and tear, obsolescence, or other factors. By spreading the cost of the asset over the period it is expected to provide economic benefits, depreciation provides a more accurate picture of an entity's financial performance and position. This method supports the matching principle in accounting, which aims to match expenses with the revenues they help to generate during the same period.

The other options do not accurately represent the concept of depreciation. For instance, stating that it involves an increase in an asset's market value misrepresents the traditional understanding of depreciation, which typically assumes a decrease in value. Additionally, treating depreciation as a full expense deducted at the time of purchase overlooks the financial principle that expenses should be recognized over time as the asset contributes to revenue generation. Lastly, the idea of revaluating assets annually is more aligned with fair value accounting practices rather than the systematic allocation mechanism that defines depreciation under GAAP.