The decrease in value of an asset due to wear and tear is called depreciation. According to International Accounting standards all the Fixed Assets should have an estimated useful life.

And the firms should divide the cost of an asset on its life cycle. Accounting standards does not allow you to expense all the cost of an asset in a one-year profit & loss statement.

In double entry system depreciation expense is determined by dividing the Cost of an asset by the estimated useful life of an asset. There are many methods for calculating depreciation expense but the famous areas.

  • By straight line method
  • Double Declining Method
  • Units of Production
  • Sums of Years Digit

Most of the firms use the straight line method for depreciation purpose. As it is easy to calculate with a constant effect on the income statement. The other methods are also used by some organizations, but their use is much lower than the first one.

How Depreciation Expense is Calculate by using straight line method:

As the name suggest the expense is calculated on a straight line. Let have a look on the formula so you can understand better

Depreciation Expense= (Cost of Asset-Residual Value)/ Estimated life of Asset.

Two methods are again used to record depreciation. In the first method after the completion of financial period the depreciation expense is subtracted from Asset value and charge to income statement for the year.

Depreciation Expense            Dr

Asset Value                             Cr

Income Statement A/C          Dr

Depreciation A/C                    Cr

In this method the value of asset is recorded as the net amount in the balance sheet. This method is not preferred by the International Accounting standards.

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In the other method of recording depreciation, an account in the name of accumulated depreciation is created. This account is used to accumulate the total depreciation throughout the life of an asset.

If there is an estimated residual value for an asset, then the carrying amount at the end of its life cycle should be equal to its residual value.

On the first year of Acquisition of Asset the entry will be:

Depreciation Expense             Dr

Accumulated Depreciation                 Cr

On the second year the next depreciation expense will be add with the previous balance in the accumulated depreciation account. The entry will be as follows

Depreciation Expense             Dr

Accumulated Depreciation                 Cr

This entry will add the current year depreciation expense with the previous year closing balance. And this process will be carry on till the life of asset.

Now there will be an adjusting entry if the depreciation expense is charges less or more from due to any reason. If the depreciation is previously charge less from the original, then the entry should be

Depreciation expenses            Dr

Accumulated Expenses           Cr

And if the Depreciation is charge on a high rate than the estimated rate then the adjusting entry should be

Accumulated Depreciation          Dr

Depreciation expense                         Cr

Now look at the example:

If the depreciation expenses recorded amount of $7,500 while the correct depreciation during the period should be charged only amounted to $9,000. Therefore, the $1,500 adjusting entry should be made to rectify the amount of accumulated depreciation account.

The accounts to be affected by this adjustment are the accumulated depreciation and depreciation account. Accumulated depreciation is the balance sheet item account while depreciation is the income statement account.

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The above error result under charged depreciation expenses during the period; therefore, the depreciation expenses amount $1,500 should be added on and accumulated depreciation amount should be subtraction from.

This adjustment will increase depreciation expenses in income statement and reduce the varying value or net books value of fixed assets in balance sheet through increasing accumulated depreciation.

Here is what the adjustment will look like;

Depreciation Expense                 $1500

Accumulated Depreciation                    $1500


Depreciation Expense (Income Statement)

Accumulated Depreciation (Balance Sheet)