Definition of sinking fund method

Sinking fund method is a method of depreciation if a large sum of money is required for replacement of an asset at the end of its effective life it may not be advisable to leave in the amount of depreciation set apart annually, for it may or may not be available in the form of the readily realisable assets to the concern at the time it is required. To safegaurd this position the amount annually provided for depreciation may be placed to the credit of the sinking fund account