The Indian government has eliminated the export duty on petrol and reduced taxes on diesel and aviation fuel, effective August 15, 2026. While this eases the tax burden and improves profit margins for domestic refiners, the fortnightly review mechanism means export levies remain volatile and tied to global oil prices.
The Indian government has eased the tax burden on petroleum product exports, effective from Saturday, August 15, 2026. This move involves a significant reduction in the Special Additional Excise Duty (SAED), commonly referred to by the market as the windfall tax.
Under the new order, the export duty on petrol has been completely eliminated. Previously, this levy stood at 3.5 rupees per litre. For diesel, the export tax has been trimmed to 24 rupees per litre, down from the earlier 25.5 rupees. Similarly, the tax on aviation turbine fuel has been reduced to 19.5 rupees per litre, compared to the previous 22 rupees. These changes apply specifically to exported fuels and do not impact excise duties for fuel consumed within India.
This windfall tax was first implemented in mid-2022 to capture a portion of the unusually high profits that domestic refiners were earning due to a sharp spike in global oil prices. The government's policy has been to keep domestic fuel supplies stable while ensuring that export profits remain within a regulated range. By lowering these duties, the government effectively allows refiners to retain a larger share of their export earnings, which can help improve their refining margins.
For investors, these changes come with a layer of complexity. The government reviews these tax rates every two weeks to keep pace with changing international crude oil prices. This fortnightly adjustment mechanism means that export duties are not set in stone; they can be increased again if global price differentials widen or if the government sees a need to collect more revenue from export profits. Consequently, the profit benefits from these tax cuts may not be permanent.
The inherent volatility of global oil prices remains a key variable for refiners. Because the tax structure is reactive to these global price fluctuations, earnings visibility for private refiners can be difficult to predict. Investors monitoring these stocks may need to track global crude oil benchmarks alongside the government's subsequent fortnightly reviews to gauge the consistency of refining margins. This policy-driven variability is a standard operational factor for companies involved in large-scale fuel exports, as the tax rates are subject to change whenever market conditions shift.