Depreciation is non cash expense which is charge on fixed assets for continuous uses of fixed assets in business. Depreciation reduces the value of fixed assets even if such fixed assets is not put to used. Depreciation is mandatory under Income Tax i.e. if assessee fail to claim depreciation then IT Officer shall charge depreciation.
Depreciation is debited in P/L A/C as non cash expense which reduce the profit. As a result of which assessee will get depreciation tax sheild benefit.