CAFE III Norms Notified: What India's New Fuel-Efficiency Rules Mean for Car Buyers

India's Toughest Fleet Fuel-Efficiency Regime Is Now Law

The Ministry of Power has notified the third phase of the Corporate Average Fuel Economy (CAFE III) norms, and the rules will bind every carmaker selling passenger vehicles in India from 1 April 2027 to 31 March 2032. Unlike a per-car mileage test, CAFE works on a fleet average: a manufacturer gets one report card based on the weighted average unladen weight of all the cars it sells, and it must keep the average fuel consumption below a target that tightens every year.

The headline is strict. At the reference fleet weight of 1,229 kg, the fuel-consumption benchmark starts at 3.996 litres per 100 km in FY28 and tightens to 3.3273 litres per 100 km by FY32, an improvement of about 16.7 per cent. The reference weight itself has risen from 1,082 kg under the previous regime, and the weight curve is flatter, which hands lighter fleets a softer target and demands more from heavy SUV-heavy portfolios.

Why EVs, Hybrids and Even Small Cars Now Matter More

The final framework rewards a wider set of technologies than the draft did. Battery-electric vehicles and range-extended EVs earn a volume derogation factor, or super-credit, of 3.0, meaning ten thousand EVs count as thirty thousand units in the fleet calculation. Plug-in hybrids and flex-fuel strong hybrids get 2.5, conventional strong hybrids 1.6, and flex-fuel ethanol vehicles 1.1. Carmakers can also claim 1 g CO2/km for each of up to 12 recognised fuel-saving technologies, capped at 9 g CO2/km.

The draft's special concession for petrol cars under 909 kg has been dropped. Instead, the flatter weight formula itself gives small-car-heavy portfolios such as those of Maruti Suzuki, Renault and Nissan more headroom, while manufacturers dependent on heavier petrol and diesel SUVs face a tighter standard. India's EV and hybrid-heavy players now have several compliance routes rather than one. Buyers tracking how this reshapes line-ups can follow the market-wide numbers on AUTOINDIA's sales coverage.

What This Means for You

CAFE III does not promise 30 km/l from every new car. It pushes the entire new-car fleet towards better efficiency, and the flexibilities, including credit trading and a buyout window through the Bureau of Energy Efficiency priced from Rs 2,500 to Rs 4,500 per g CO2/km, mean the actual on-road improvement may be smaller than the headline. Still, expect more hybrid, CNG, ethanol-ready and electric options across showrooms from 2027 onwards, which is good news for running costs over a typical five-year ownership.

(Sources: Ministry of Power CAFE III notification dated 29 September 2026, ETAuto and The Economic Times, The Hindu BusinessLine explainer, Indian Express, Autocar Professional)