Depreciation and obsolescence both reduce the value of a business asset, but they are not the same thing. Depreciation is the planned, gradual allocation of an asset's cost over its useful life, recorded in the books every year regardless of how the asset performs.
Obsolescence is the sudden or early loss of an asset's usefulness, often before its depreciation schedule ends, because a newer technology, a change in regulation or a shift in business needs makes it redundant.
Knowing which one applies to a given asset changes how you record it, how you claim tax relief on it and how accurately your financial statements reflect what your assets are actually worth.
What is depreciation in accounting?
It is the systematic reduction in the recorded value of a fixed asset over the period it is expected to remain useful to the business. Accountants use depreciation methods to spread the original cost of the asset across its estimated useful life using a method such as the straight-line method or the written-down value method.
A delivery van bought for Rs. 8,00,000 with a useful life of eight years and no residual value would lose roughly Rs. 1,00,000 in book value each year under the straight line method, whether or not the van is actually driven that much. This charge appears in the profit and loss account every year and reduces the asset's value in the balance sheet, so depreciation is a routine, predictable accounting entry rather than a response to a specific event.
What is obsolescence in accounting?
Obsolescence is the loss of an asset's economic usefulness before the end of its expected life, usually caused by a factor outside normal wear and tear. A printing press can become obsolete because a newer digital process cuts costs in half, even though the press still runs and has years of depreciation left on the books.
Obsolescence can be technological, when new equipment or software makes the old asset redundant; functional, when the asset no longer fits how the business now operates; or regulatory, when a change in law makes the asset unusable for its original purpose.
Unlike depreciation, obsolescence does not follow a fixed schedule and often forces a business to write down or write off an asset's value in one go instead of over several years.
How do depreciation and obsolescence differ from each other?
The table below sets out how the two ideas differ across the areas that matter most in day-to-day accounting.
|
Basis |
Depreciation |
Obsolescence |
|
Cause |
Passage of time and normal use |
New technology, regulation change or shift in business need |
|
Timing |
Follows a fixed schedule set at purchase |
Can happen at any point, often without warning |
|
Accounting treatment |
Charged every year as an expense |
Recognised as an impairment loss or write off once confirmed |
|
Predictability |
Calculated in advance using a set method |
Identified through review, not a formula |
|
Effect on the asset |
Reduces book value gradually |
Can end the asset's use well before its book value reaches zero |
Both entries reduce the value recorded for an asset, but depreciation is scheduled from the day the asset is purchased, while obsolescence is identified only when it actually happens.
Can an asset become obsolete before it is fully depreciated?
Yes. An asset can become obsolete well before it is fully depreciated, and this is where the two concepts most often meet. A business that buys computer hardware on a five-year depreciation schedule may find it technologically obsolete within two years, long before the depreciation charge finishes reducing its book value.
When this happens, the asset sits in the books at a value that no longer reflects what it is actually worth to the business, so an additional step, an impairment review or a write-off, becomes necessary to bring the recorded value closer to reality.
How should a business record obsolescence in its books?
Once an asset is confirmed obsolete, the business compares its carrying amount on the books with its recoverable amount, which is the higher of its value in use and its net selling price. If the recoverable value is lower than the carrying value, the difference is recognised as an impairment loss under Accounting Standard 28 for companies that follow Indian GAAP or Ind AS 36 for companies that follow Ind AS.
If the asset is scrapped entirely, its remaining book value is written off, and any scrap sale proceeds are recorded separately. This differs from a routine depreciation entry because it usually needs a fresh valuation and supporting documentation rather than an automatic calculation.
Conclusion
Depreciation and obsolescence measure two different kinds of value loss. One is scheduled and predictable, while the other is sudden and tied to a real-world change in the asset's usefulness. A business needs to track both to keep its asset values accurate, since a fully depreciated asset can still be useful and a barely depreciated asset can already be obsolete. TallyPrime lets a business record depreciation through a journal voucher each accounting period and track the resulting values through the Fixed Assets Analysis report. The same voucher-based approach records an asset's write-off or sale once it stops being useful, so both entries appear in the same set of books.
