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Depreciation is the cost that is allocated to a fixed asset over its useful life. In other words, the cost of the asset is spread over the useful life.

It’s a common misconception that depreciation is used as a way to “expense” an asset over time, but in reality that’s not what happens. Depreciation is recorded as an expense on the income statement, but it’s not an expense of the asset, it’s just a way to spread that cost over the length of the asset’s life.

Concept of Depreciation

Property, plant and equipment, except land, normally are usable for a number of years after which they have relatively little value either for service or for sale. The difference between the original cost of a property and any remaining value when it is retired or worn out is an expense that should be distributed to the periods during which the asset is used. The portion that is allocated to expense in a particular period is referred to by three different terms: depreciation, depletion or amortization.

Depreciation is defined as “the systematic allocation of the depreciable amount of an asset over its useful life.”

In other words, depreciation is simply a process of allocation and not of valuation. Depreciation is the portion of the cost or other amount substituted for cost allocated or charged as expense during an accounting period.

Depreciation is not so much a matter of valuation as it is a matter of cost allocation in recognition of the exhaustion of the life of a tangible property used in business operations.

The objective of depreciation is to have each period benefiting from the use of the asset bear an equitable share of the asset cost.

Depreciation in the Financial Statements

Depreciation is an expense. It may be a part of the cost of goods manufactured or an operating expense. The depreciation charge for each period shall be recognized as expense unless it is included in the carrying amount of another asset.

Except for nonexhaustible land, all property shall be depreciated on a systematic basis over the useful life of the asset irrespective of the earnings of the entity.

The financial statements would be misstated if depreciation is omitted when the entity has a loss and recognized when the entity has a gain.

The omission of depreciation may somehow impair legal capital if and when dividends are declared out of earnings before provision for depreciation.

Depreciation Period

Depreciation of an asset begins when it is available for use, meaning, when the asset is in the location and condition necessary for it to be capable of operating in the manner intended by management.

Depreciation ceases when the asset is derecognized.

Therefore, depreciation does not cease when the asset becomes idle temporarily.

Temporarily idle activity does not preclude depreciating the asset as future economic benefits are consumed not only through usage but also through wear and tear and obsolescence.

However, if the asset is “classified as held for sale” in accordance with IFRS 5, depreciation shall be discontinued.

Kinds of Depreciation

There are two kinds of depreciation, namely physical depreciation and functional or economic deprecation.

Physical depreciation

Physical depreciation is related to the depreciable asset’s wear and tear and deterioration over a period.

Physical depreciation may be caused by:

  1. Wear and tear due to frequent use
  2. Passage of time due to nonuse
  3. Action of the elements such as wind, sunshine, rain or dust
  4. Accidents such as fire, flood, earthquake and other natural disaster
  5. Disease – This physical cause is applicable to animals and wooden buildings

Accordingly, physical depreciation results to the ultimate retirement of the property or termination of the service of the asset.

Functional or Economic Depreciation

Functional or economic depreciation arises from obsolescence or inadequacy of the asset to perform efficiently.

Obsolescence may arise from the following:

  1. When there is no future demand for the product which the depreciable asset produces.
  2. When a new depreciable asset becomes available and the new asset can perform the same function for substantially less cost.

Inadequacy arises when the asset is no longer useful to the firm because of an increase in the volume of operations.

For example, adequate buildings acquired at the inception of business may become inadequate or limited in their future service potential when unexpected business growth or expansion requires larger facilities for efficient operation.

Factors of Depreciation

In order to properly compute the amount of depreciation, three factors are necessary, namely depreciable amount, residual value and useful life.

Depreciable amount

Depreciable amount or depreciable cost is the cost of an asset or other amount substituted for cost, less its residual value.

Each part of an item of property, plant and equipment with a cost that is significant in relation to the total cost of the item shall be depreciated separately.

For example, it may be appropriate to depreciate separately the airframe, engines, fittings (seats and floor coverings) and tires of an aircraft.

The entity also depreciates separately the remainder of the item and the remainder consists of the parts of the item are individually not significant.

Residual value

Residual value is the estimated amount that an entity would currently obtain from disposal of an asset, after deducting the estimated cost of disposal, if the asset were already of the age and condition expected at the end of its useful life.

In other words, residual value is the expected worth of the asset in present pesos at the end of its useful life.

The residual value of an asset shall be reviewed at least at each financial year-end and if expectation differs from previous estimate, the change shall be accounted for as a change in an accounting estimate.

In practice, the residual value of an asset is often insignificant and therefore immaterial in the calculation of the depreciable amount.

The residual value of an asset may increase to an amount equal to or greater that the asset’s carrying amount. If it does, the asset’s depreciation charge is zero unless and until its residual value subsequently decreases to an amount below the asset’s carrying amount.

Depreciation is recognized even if the fair value of the asset exceeds its carrying amount as long as the residual value does not exceed the carrying amount. Repair and maintenance of the asset do not negate the need to depreciate it.

Useful life

Useful life is either the period over which an asset is expected to be available for use by the entity or the number of production or similar units expected to be obtained from the asset by the entity.

Accordingly, the useful life of an asset is expressed as follows:

  1. Time periods as in years
  2. Units of output or production
  3. Service hours or working hours

The economic benefits embodied in an item of property, plant and equipment are consumed principally through the use of the asset.

However, other factors such as technical obsolescence and wear and tear while an asset remains idle often result in the diminution of the economic benefits that might have been obtained from the asset.

Consequently, the following factors shall be considered in determining the useful life of an asset:

  1. Expected usage of the asset – Usage is assessed by reference to the asset’s expected capacity or physical output.
  2. Expected physical wear and tear – This depends on the operational factors such as the number of shifts the asset is used, the repair and maintenance program, and the care and maintenance of the asset while idle.
  3. Technical or commercial obsolescence – This arises from changes or improvements in production, or change in the market demand for the product output of the asset.
  4. Legal limits for the use of the asset, such as the expiry date of the related lease.

The useful life of an asset is defined in terms of the asset’s expected utility to the entity.

The estimation of useful life of an item of property, plant and equipment is a matter of judgment based on the experience of the entity with similar assets.

Methods of depreciation

  1. Equal or uniform charge methods
    1. Straight line
    2. Composite method
    3. Group method
  2. Variable charge or use-factor methods
    1. Working hours or service hours
    2. Output or production method
  3. Decreasing charge or accelerated or diminishing balance methods
    1. Sum of years’ digits
    2. Declining balance method
    3. Double declining balance method
  4. Other methods
    1. Inventory or appraisal
    2. Retirement method
    3. Replacement method

Straight line method

Under the straight line method, the annual depreciation charge is calculated by allocating the depreciable amount equally over the number of years of estimated useful life.

In other words, straight line depreciation is a constant charge over the useful life of the asset.

The formula for the computation of the annual depreciation following the straight line method is as follows:

Annual\: depreciation = (Cost – Residual\: Value) / Life\: in\: years

Cost minus residual value equals depreciable amount. Depreciable amount multiplied by the annual straight line rate of depreciation also gives the amount of annual depreciation.

The straight line rate is determined by dividing the 100% by the life of the asset in years. For example, if the life of the asset is 5 years, the annual straight line rate is 20%, computed by dividing 100% by 5 years.

This method is adopted when the principal cause of depreciation is passage of time. The straight line approach considers depreciation as a function of time rather than as a function of usage.

Examples of assets which depreciate principally because of passage of time are buildings, other structures such as radio and TV towers, dams, bridges, and office equipment such as typewriters, adding machines, and computers.

Although use and obsolescence contribute to the depreciation of such assets, such causes are insignificant compared to effects of time.

The straight line method is widely used in practice because of its simplicity.


The following data relate to an equipment acquired at the beginning of the first year:

Residual Value            5,000 
Useful life5 years 

A depreciation table may appear as follows:

Depreciation Table-Straight Line

YearParticularDepreciationAccumulated DepreciationCarrying Amount
Acquisition cost              105,000 
1Depreciation for the first year                  20,000                   20,000                   85,000 
2Depreciation for second year                  20,000                   40,000                   65,000 
3Depreciation for third year                  20,000                   60,000                   45,000 
4Depreciation for fourth year                  20,000                   80,000                   25,000 
5Depreciation for fifth year                  20,000               100,000                     5,000 
  1. Depreciable amount of P100,000 divided by 5 years equals P20,000 or the annual rate of 20% multiplied by P100,000 equals P20,000.
  2. Preceding balance of accumulated depreciation plus column (a). Thus, the accumulated depreciation at the end of the second year is equal to P20,000 (preceding balance, end of first year) plus the depreciation for the second year, P20,000 equals P40,000.
  3. Acquisition cost of P105,000 minus column (b). Thus, at the end of the first year, P105,000 minus accumulated depreciation balance of P20,000 equals P85,000; at the end of the second year, P105,000 minus P40,000 equals P54,000, and so on.

At the end of the life of the asset, the carrying amount should equal the residual value.

The residual value id P5,000 which is the carrying amount at the end of the 5th year.

The entry to record the annual depreciation is as follows:

Depreciation                  20,000 
Accumulated depreciation                  20,000 

The adjusting entry for depreciation is prepared at the end of every accounting period. When a statement of financial position is prepared at the end of the first year, the equipment account is classified as property, plant and equipment and presented as follows:

Equipment              105,000 
Accumulated Depreciation              (20,000)
Carrying Amount                  85,000 

The carrying amount is the amount at which an asset is recognized in the statement of financial position after deducting any accumulated depreciation and accumulated impairment loss.

Change in useful life

Unexpected physical deterioration or technological improvement may indicate that the useful life of the asset is less than that originally estimated.

On the other hand, improved maintenance procedures or revision of operating procedures may prolong the life of the asset beyond the original estimate.

The useful life of an item of property, plant and equipment shall be reviewed at least each financial year-end and if expectations are significantly different from previous estimate, the change shall be accounted for as a change in accounting estimate. Therefore, the depreciation charge for the current and future periods shall be adjusted.

Change in depreciation method

Depreciation method used shall reflect the pattern in which the asset’s economic benefits are expected to be consumed by the entity.

The depreciation method shall be reviewed at least each financial year-end and if there has been a significant change in the expected pattern of economic benefits embodied in the asset, the method shall be changed to reflect the new pattern.

When such a change in depreciation method is necessary, the change shall be accounted for as a change in accounting estimate, and the depreciation charge for the current and future periods shall be adjusted.