Value of taxable supply: transaction value governs taxable value, including specified additions and excluding certain discounts under GST valuation principles. Value of taxable supply is the transaction value, the price actually paid or payable where parties are unrelated and price is sole consideration, and includes additions such as amounts borne by recipient, free or reduced goods/services supplied by recipient, royalties and licence fees as a supply condition, non GST statutory taxes and duties, incidental expenses, linked subsidies, reimbursable costs, and post supply discounts except those pre established and invoice linked; discounts recorded on invoice before or at supply are excluded, and specified situations (non monetary consideration, related parties, doubtful declared values, certain agency transactions, and notified supplies) are valued as prescribed by rules.