Input tax credit apportionment limits credit to business-use and specifies blocked credits and attribution methods under GST.

Apportionment limits input tax credit to the portion attributable to business use or to taxable (including zero-rated) supplies when supplies are partly exempt; exempt supply valuation includes reverse charge transactions, securities and sale of land/buildings. The statute lists non-allowable blocked credits-notably most vehicles, certain hospitality and personal services, construction-related inputs for immovable property (other than plant and machinery), composition-scheme supplies, non-resident inward supplies (except imports), personal consumption, and losses-while permitting a binding monthly option for banking and financial institutions and empowering the Government to prescribe attribution methods.

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