What’s straight-line depreciation?

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Straight-line depreciation is a simple method of depreciating an asset’s value over time by dividing the overall depreciation into equal units, with the same amount claimed each year. The calculation involves determining the asset’s useful life, subtracting the projected salvage value, and dividing the remaining amount by the number of years of useful service. National revenue agencies set the rules and standards for useful life estimates, and tax professionals can help ensure compliance with tax laws.

Straight-line depreciation is the simplest and easiest-to-manage means of depreciating an asset’s value over a period of time. Essentially, the method involves determining the overall depreciation that is likely to occur over the asset’s useful life and dividing that amount into equal units. Each calendar year, one of those equal amounts of depreciation is claimed, allowing the owner to receive some type of tax break on the cost of the asset. Since the amount of depreciation is the same from one year to the next, there is no need to worry about recalculating the depreciation rate each tax period.

The straight-line depreciation calculation begins by considering the full purchase price of the asset and determining the number of years the asset will be considered useful. At the same time, it is important to identify how much the asset can be sold for at the end of that useful life, either as a single unit or by disassembling the asset and selling the individual components. The projected salvage value of the asset is deducted from the original purchase price. That figure is divided by the number of years the asset is expected to provide useful service. The end result is the amount of depreciation that is claimed for that asset for each of those years.

One of the easiest ways to understand how straight-line depreciation works is to consider buying a new car. The original purchase price is $20,000 United States Dollars (USD), and the owner anticipates that the vehicle will have a useful life of five years before replacement is necessary. It is estimated that at the end of those five years, the vehicle can be sold as salvage for $500 USD. Deducting this approximate salvage value from the purchase price, this leaves a figure of $19,500 USD which is then divided by five. If the owner chooses to claim straight-line depreciation, he will claim $3,900 USD depreciation for each of the five years of useful life.

Useful life estimates are generally governed by the rules and standards set by national revenue agencies. This means that the straight-line depreciation process for tax purposes must follow the current standards that apply in a given jurisdiction. The total useful life of a given asset may vary, depending on the nature of that asset and what is considered normal and reasonable use of that asset. Tax professionals can help individuals and businesses understand current regulations and ensure that straight-line depreciation is determined in accordance with tax laws, allowing the taxpayer to receive the greatest degree of depreciation benefit.

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