Percentage Depreciation Calculator

Depreciation is a crucial concept in finance and accounting, especially when it comes to calculating the value of assets over time. One common method of calculating depreciation is percentage depreciation, which allows you to determine the decrease in value of an asset as a percentage of its original cost. In this tutorial, we'll explain the formula for percentage depreciation, provide examples of how it's used in real life, and share some interesting facts about this topic.

Percentage (Declining Balance) Depreciation Calculator
Depreciation Schedule
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Formula for Percentage Depreciation

The formula for percentage depreciation is:

Percentage depreciation = (Depreciation cost / Original cost) x 100%


  • Depreciation cost is the decrease in value of the asset over time.
  • Original cost is the initial purchase price of the asset.

This formula calculates the percentage by which an asset's value has decreased over time due to depreciation. For example, if an asset was purchased for $10,000 and its current value is $8,000, the depreciation cost would be $2,000, or 20% of the original cost.

Real-Life Example

Let's say you own a company that operates a fleet of delivery trucks. One of your trucks was purchased for $50,000 and has a useful life of 10 years. At the end of 5 years, you decide to sell the truck. You estimate that the truck's current value is $25,000.

To calculate the percentage depreciation of the truck, you can use the formula:

Percentage depreciation = ((Original cost - Current value) / Original cost) x 100%

Plugging in the numbers, we get:

Percentage depreciation = (($50,000 - $25,000) / $50,000) x 100% = 50%

So the truck has depreciated by 50% of its original cost over 5 years. This information can be useful for tax purposes and for determining when it's time to replace the truck.

Interesting Facts

  • Depreciation is often used to calculate the value of assets for accounting and tax purposes.
  • There are several methods of calculating depreciation, including straight-line depreciation, accelerated depreciation, and declining balance depreciation.
  • Depreciation can also be used to calculate the value of intangible assets, such as patents and copyrights.
  • Depreciation can be influenced by factors such as wear and tear, obsolescence, and changes in market demand.
  • Depreciation can have a significant impact on a company's financial statements, including its income statement and balance sheet.


Percentage depreciation is a useful tool for calculating the decrease in value of an asset over time. By using the formula we've provided and plugging in the numbers for depreciation cost and original cost, you can calculate the percentage by which an asset has depreciated. This information can be useful for tax purposes, financial reporting, and determining when it's time to replace an asset. With this tutorial, you now have a better understanding of how to calculate percentage depreciation and its importance in finance and accounting.