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Depreciation and Amortization

Depreciation and amortization is necessary for a company to respect the matching principle. Since long-term assets are used for longer than a year, the costs incurred need to be spread out over time.

Depreciation and Amortization Expense
  • Represents the portion of the assets cost that was used in the current period.
  • Depreciation expense is used for tangible assets (property, plant and equipment)
  • Amortization expense is used for intangible assets


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Factors that Affect Depreciation
  • Useful life: How long the company estimates it will use the asset for.
  • For intangible assets, cost is amortized over the shorter of the useful life or the legal life.
  • Residual value: The value the company estimates will remain at the end of the asset's life, also called salvage value.
  • Depreciation method: The type of depreciation used, typically depends on the type of asset.
  • Straight-line method
  • Declining-balance method
  • Units of production method

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Accumulated Depreciation
  • Contra-asset
  • Represents the total amount of depreciation on an asset since it was acquired.
  • Decreases the carrying value of an asset.




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Journalizing Depreciation
  • Adjusting journal entry
  • Debit depreciation expense
  • Credit accumulated depreciation of specific asset



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Amortization Table

The amortization table is a useful tool for organizing and keeping track of the depreciation or amortization of a company's assets.

For each year the asset has been owned, it shows the:

  • Cost
  • Any additional capital expenditures are added to cost in the year they occur
  • Annual depreciation
  • Accumulated depreciation
  • Carrying Value
  • Cost - Accumulated depreciation