Question

what is the difference btw straight line method and written down method?

Answer 1

The difference between the two methods can be tabulated as:

Basis of Difference	Straight Line Method	Written Down Value Method
Basis for calculation	Depreciation is calculated on the original cost of an asset.	Depreciation is calculated on the reducing balance, i.e., the book value of an asset.
Amount of depreciation	Equal amount is charged each year over the effective life of the asset.	Diminishing amount of depreciation (on the written down value of asset) is charged each year over the effective life of the asset.
Book value of asset	Book value of the asset becomes zero at the end of its effective life.	Book value of the asset can never be zero.
Suitability	It is suitable for the assets like patents, copyright, land and buildings, etc., which have lesser possibility of obsolescence and lesser repair charges.	It is suitable for assets that needs more repair in the later years like, plant and machinery, car, etc.
Effect of depreciation and repair on profit and loss account	Unequal effect over the life of the asset, as depreciation remains same over the years but repair cost increases in the later years.	Equal effect over the life of the asset, as depreciation cost is high and repairs are less in the initial years but in the latter years the repair costs increase and depreciation cost decreases.
Recognition under Income Tax Act	It is not recognised under the income tax act.	It is recognised under the income tax act.