India Hikes Windfall Tax on Diesel, ATF Exports Sharply

Introduction

In a decisive move to secure domestic energy supplies and manage inflationary pressures, the Indian government has sharply increased the windfall tax on the export of diesel and aviation turbine fuel (ATF). This policy intervention comes as volatile global crude oil prices, exacerbated by geopolitical tensions in the Middle East, have created a complex economic environment. The new tax structure aims to curb the substantial profits of oil refiners and ensure that an adequate supply of fuel remains available within the country, thereby protecting consumers from potential shortages and price shocks.

The Revised Tax Structure

The Finance Ministry announced the revised rates through an official notification, marking a significant escalation in export duties. The windfall tax on diesel exports has been more than doubled, rising from ₹21.5 per litre to ₹55.5 per litre. Similarly, the duty on ATF exports has been increased to ₹42 per litre from the previous rate of ₹29.5 per litre. Notably, petrol exports continue to remain exempt from this levy. This measure is a direct response to the high margins refiners have been earning by selling fuel in the international market, where prices have been driven up by supply concerns.

Rationale for the Tax Hike

The government's decision is rooted in the need to insulate the domestic economy from the turbulent global energy landscape. International crude oil prices recently surged to nearly $119 per barrel before settling around $18, largely due to the conflict in Iran and disruptions around the Strait of Hormuz, a critical channel for global oil supply. By making exports less profitable, the government incentivizes refiners to prioritize the domestic market. This strategy is designed to prevent fuel shortages and stabilize prices for Indian consumers and industries, particularly in the transport and aviation sectors.

Impact on India's Refining Sector

The increased windfall tax directly impacts the profitability of India's refining companies, which have been benefiting from robust global refining margins. These margins, which averaged between $1 and $12 per barrel in early 2026, were fueled by a global scarcity of refined products like diesel and jet fuel. The new tax effectively captures a portion of these