Input tax credit apportionment limits recoverable credit where supplies are partly for exempt use; specified items are blocked. Credit is restricted where goods or services are used partly for business or partly for taxable and exempt supplies; exempt supply value is prescribed and includes reverse charge supplies, securities, sale of land and certain buildings. Specific items are blocked from credit (vehicles except limited uses, certain hospitality and insurance services, works contract and construction for immovable property, composition scheme supplies, non resident inward supplies, personal consumption, losses, gifts/samples, and specified penalty taxes). Banks and financial institutions have an optional monthly mechanism to claim a fixed proportion of eligible credit subject to conditions and irrevocability; attribution and definition of plant and machinery are prescribed.