India has a complex mechanism to determine the prices of petrol and diesel at the pumps. Indian motorists paid in the range of Rs 90 to Rs 97 a litre for diesel in June 2022, when international rates were at $170 a barrel, and continue paying the same price now when the global rates have halved. The stated policy, however, is that pump prices will reflect fluctuations in international prices. State-run refiners use a combination of the import parity price (IPP) of fuel and the export parity price (EPP) to arrive at an industry price — in the case of petrol and diesel, they use 80 per cent IPP and 20 per cent EPP. The IPP is arrived at by taking the Arab Gulf S&P Platts assessment price, to which are added freight costs between an Arab port and India, insurance, port charges, and taxes. The rupee-dollar exchange rate is also factored in. Further, after calculating the delivered price at Mumbai port, inland pipeline costs and other logistics charges are added to calculate the refinery gate price. Finally, local distribution costs and marketing margins are added to calculate pump prices.

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