What Happened
- India reimposed and sharply raised the windfall tax (export duty) on diesel to ₹55.5 per litre and on Aviation Turbine Fuel (ATF) to ₹42 per litre, effective April 11, 2026.
- The previous rates were ₹21.5/litre for diesel and ₹29.5/litre for ATF; petrol export duty remained unchanged.
- The Department of Revenue issued a series of notifications on April 11 invoking "immediate action" powers, bypassing the standard fortnightly review cycle.
- The primary objective is to deter refined product exports and ensure adequate domestic fuel supply during the ongoing Strait of Hormuz shipping crisis.
- The government simultaneously revised excise and cess components on diesel, indicating a comprehensive restructuring of petroleum fiscal policy.
Static Topic Bridges
Special Additional Excise Duty (SAED) and India's Petroleum Tax Architecture
India's petroleum product taxation is a layered structure involving central excise duties, cesses, and state VAT/sales tax. At the central level, the key instruments include Basic Excise Duty, Special Additional Excise Duty (SAED), Road and Infrastructure Cess (RIC), and Agriculture Infrastructure Development Cess (AIDC). For fuels, the SAED component is particularly important because it can be modified by executive notification without legislative amendment, making it the instrument of choice for dynamic policy tools like windfall taxes.
- Petroleum products (petrol and diesel) were kept outside the Goods and Services Tax (GST) framework, preserving both central and state government revenues from these products.
- The exclusion of petroleum from GST means the Centre retains full flexibility over excise duty rates, and states retain flexibility over VAT rates, without any GST Council coordination.
- The fortnightly review mechanism of windfall tax uses SAED as the adjustable lever, allowing the government to respond to global oil price movements in near-real-time.
Connection to this news: The April 11 hike uses the SAED/export duty mechanism to rapidly respond to the Strait of Hormuz crisis — the same administrative flexibility that allowed rapid rate changes during 2022-2024 is being used again in 2026.
Crude Oil Import Dependence and Domestic Energy Vulnerability
India's heavy dependence on imported crude oil creates structural vulnerability to global geopolitical events. The country imports approximately 87–90% of crude needs, with 50–53% sourced from Middle Eastern producers that rely on the Strait of Hormuz for export. The 2026 Strait of Hormuz crisis, triggered by the US-Israel-Iran conflict, caused the largest disruption to global energy supply since the 1973 Arab oil embargo, directly impacting India's LNG imports (used in fertiliser production) and crude supplies.
- The Strait of Hormuz, located between Iran and Oman, is only 33 km wide at its narrowest point and handles about 20% of the world's total oil and 25% of globally traded LNG.
- India has strategic petroleum reserves (SPR) at Visakhapatnam, Mangaluru, and Padur (total ~5.33 MMT capacity) as a buffer against supply disruptions.
- Iran announced selective passage rights for vessels of China, Russia, India, Iraq, and Pakistan during the crisis, though implementation remained uncertain.
Connection to this news: The windfall tax hike directly stems from India's crude import dependence — when global supply disrupts and refiner margins on exports surge, the government must use fiscal tools to ensure domestic product availability rather than allowing full export of refined output.
Public Sector vs. Private Sector Dynamics in Petroleum Refining
India's refining sector has a unique dual structure: Public sector Oil Marketing Companies (IOC, BPCL, HPCL) sell fuel domestically at government-regulated prices and are compensated through under-recovery mechanisms, while private refiners (Reliance Industries, Nayara Energy) primarily export at market prices. During periods of high global prices, private refiners' export profitability surges, creating an incentive to maximise exports rather than domestic sales. Windfall taxes are specifically designed to address this asymmetry.
- Reliance's Jamnagar refinery is the world's largest single-location refinery (~1.4 million barrels/day capacity).
- Under a 2023 ruling, Reliance's Jamnagar SEZ exports are exempt from windfall tax as SEZ units are deemed to export from a foreign territory; this exemption was under review as of early April 2026.
- Public OMCs do not face windfall tax as their exports are limited and subject to different pricing arrangements.
Connection to this news: The sharp increase in export duty targets private refiner-exporters who benefit most from the arbitrage between low domestic crude costs and high global product prices during supply crises.
Key Facts & Data
- Diesel export duty: ₹21.5/litre → ₹55.5/litre (effective April 11, 2026)
- ATF export duty: ₹29.5/litre → ₹42/litre (effective April 11, 2026)
- India's crude import dependence: ~87-90% of total consumption
- Middle East share of India's crude imports: ~50-53%
- Strait of Hormuz handles ~20% of global oil and ~25% of globally traded LNG
- India's SPR capacity: ~5.33 MMT at three locations (Vizag, Mangaluru, Padur)
- Petroleum products remain outside GST; subject to central excise + state VAT
- Windfall tax instrument: Special Additional Excise Duty (SAED) under Customs Tariff Act