Written down value rules preserve block asset values on specified transfers and govern computation of WDV and depreciation.

Written down value rules differentiate assets acquired in the tax year (actual cost), assets acquired earlier (actual cost less depreciation actually allowed), and blocks of assets (using the formula [(A-D)+B-C]-E with defined components). Carried forward depreciation under the carryforward provision is treated as depreciation actually allowed. Specific transfer and reorganisation scenarios (holding/subsidiary transfers, amalgamations, demergers, company to LLP conversions, corporatisation transfers, and succession assessments) preserve or apportion written down value as prescribed. Revaluation and partial agricultural income rules adjust cost and deemed depreciation.

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