GST exemption on upfront lease premium applies even if payable in installments, when the amount is determined upfront. GST exemption applies to the upfront amount (premium, salami, cost, price, development charges or by any other name) for long term leases (thirty years or more) of industrial or financial infrastructure plots by State Government Industrial Development Corporations or similarly government owned entities. The exemption remains admissible whether the determined upfront amount is paid in one payment or in multiple installments, provided the amount is fixed upfront.