Finance

Accumulated Depreciation Calculator

Calculate accumulated depreciation using the straight-line method. Find the total depreciation and book value of your assets over time.

$
$
years
years
Accumulated depreciation
$13,500
Asset cost
$50,000
Salvage value
$5,000
Depreciable base
$45,000
Annual depreciation
$4,500
Depreciation rate
9.00%
Current book value
$36,500

The stacked areas show book value declining as accumulated depreciation increases.

How Accumulated Depreciation Works

Accumulated depreciation represents the total amount of an asset's cost that has been expensed as depreciation since the asset was put into use. It's a contra-asset account that reduces the value of the related asset on the balance sheet.

This calculator uses the straight-line depreciation method, which spreads the cost of the asset evenly over its useful life.

The Straight-Line Method

The straight-line depreciation method is the simplest and most commonly used approach. It allocates an equal amount of depreciation expense to each year of the asset's useful life.

Formulas

The annual depreciation expense is calculated as:

Annual Depreciation=Asset Cost−Salvage ValueUseful Life\text{Annual Depreciation} = \frac{\text{Asset Cost} - \text{Salvage Value}}{\text{Useful Life}}

The accumulated depreciation is:

Accumulated Depreciation=Annual Depreciation×Years Owned\text{Accumulated Depreciation} = \text{Annual Depreciation} \times \text{Years Owned}

The current book value is:

Book Value=Asset Cost−Accumulated Depreciation\text{Book Value} = \text{Asset Cost} - \text{Accumulated Depreciation}

Key Terms

  • Asset Cost: The original purchase price, including installation and setup costs
  • Salvage Value: The estimated value of the asset at the end of its useful life
  • Depreciable Base: The portion of the asset's cost that can be depreciated (cost minus salvage value)
  • Useful Life: The expected period over which the asset will be used
  • Book Value: The asset's value after accounting for depreciation (also called carrying value)

Why It Matters

Understanding accumulated depreciation is important for:

  1. Accurate financial reporting - Shows the true value of assets on the balance sheet
  2. Tax planning - Depreciation is a tax-deductible expense
  3. Asset management - Helps determine when to replace aging assets
  4. Investment analysis - Provides insight into a company's capital expenditures