India has scrapped excise duty on petrol blended with 22% to 30% ethanol, extending tax support beyond the E20 programme and signalling a sharper policy push towards alternative transport fuels as the country seeks to curb crude oil imports and deepen its domestic biofuel market.
The Finance Ministry’s notification covers E22, E25, E27 and E30 petrol grades, setting the excise duty rate at nil for blends that contain 22%, 25%, 27% and 30% ethanol by volume. The exemption applies to specified ethanol-petrol mixtures where the motor spirit component and ethanol component meet tax and quality conditions, including conformity with Bureau of Indian Standards specifications.
The move comes after standards were put in place for higher ethanol blends, creating a formal technical and tax framework for fuels above the current E20 grade. E22 will contain 78% petrol and 22% ethanol, E25 will contain 75% petrol and 25% ethanol, E27 will contain 73% petrol and 27% ethanol, and E30 will contain 70% petrol and 30% ethanol. The decision gives oil marketing companies and fuel suppliers a clearer route to test, price and distribute higher-blend petrol when vehicle compatibility and retail infrastructure allow.
The exemption marks an important shift in the ethanol blending programme, which moved from modest blending levels a decade ago to nationwide E20 availability. The government advanced its 20% blending target from 2030 to 2025 as part of a wider energy security strategy. Average ethanol blending rose from low single digits in the previous decade to around 18% in the 2024-25 ethanol supply year by late February 2025, before the E20 target was achieved ahead of the original schedule.
The tax relief does not immediately mean a change in petrol prices for ordinary motorists. Regular petrol and E20 fuel remain the main retail products across most outlets, while higher blends require compatible engines, calibration, warranties and fuel distribution systems. Automakers have been preparing vehicles for E20, but blends beyond that level are expected to need wider testing, especially for older two-wheelers and cars not designed for higher ethanol exposure.
The policy, however, gives a commercial signal to refiners, sugar mills, grain-based distilleries and vehicle manufacturers. Sugar and ethanol-linked companies gained on expectations that higher-blend fuels could widen demand for ethanol, though the actual effect will depend on procurement prices, feedstock availability and the pace at which oil companies roll out new grades.
The latest duty change follows the launch of E85 fuel for flex-fuel vehicles, with state-run oil marketing companies expected to offer the high-ethanol blend at a discount to E20 because ethanol has lower energy density than petrol. E85 contains a far higher share of ethanol and is intended for vehicles designed to run on flexible fuel combinations. Its rollout remains limited, but it points to the direction of policy: a wider fuel basket rather than dependence on one petrol grade.
The ethanol programme is closely tied to farm and rural industry policy. Ethanol is produced from sugarcane-based molasses, sugarcane juice, damaged foodgrains and maize, creating an additional market for agricultural output. For sugar mills, ethanol supply has helped improve cash flow and reduce cane payment arrears, while grain-based distilleries have expanded capacity to meet rising demand from oil companies.
The policy also has constraints. Ethanol production competes with food, sugar and water priorities, especially in years of weak monsoon or tighter grain supplies. Higher use of sugarcane-based ethanol can raise questions over water intensity, while grain diversion requires careful management to avoid pressure on food prices. Policymakers have increasingly looked to maize and diversified feedstocks to reduce dependence on sugarcane and maintain supply stability.
Vehicle performance is another challenge. Ethanol has a lower calorific value than petrol, which can reduce mileage unless engines are optimised for higher blends. Components such as rubber seals, fuel lines and certain metals also need compatibility safeguards at higher ethanol concentrations. That is why any move beyond E20 is expected to be phased, with flex-fuel vehicles and new-generation engines likely to lead adoption.
