In the straight-line method of depreciation, what factor is primarily considered?

In the straight-line method of depreciation, the primary factor considered is the asset's estimated lifespan. This method involves spreading the cost of an asset evenly over its useful life, meaning that the total cost of the asset is divided by the number of years it is expected to be in service. The assumption is that the asset will provide equal benefits over this time period, allowing companies to allocate the same amount of depreciation expense each year.

Determining the estimated lifespan involves looking at the asset's expected usage, wear and tear, and any applicable industry standards or guidelines. This consistent expense allocation reflects the steady consumption of the asset’s value over time, making it a straightforward and widely used approach in accounting practices.