India’s third Corporate Average Fuel Economy, or CAFE III, regime will push carmakers towards a fleet-wide fuel-efficiency improvement of 16.7 per cent between 2027-28 and 2031-32. But the framework’s real significance lies not only in the tightening target. It is also in the wide set of compliance routes available to manufacturers, including electric-vehicle multipliers, hybrid benefits, alternative-fuel credits, credit trading and multi-year balancing of shortfalls.
That combination makes CAFE III more than a technical rule for vehicle manufacturers. It is an attempt to manage the environmental and energy consequences of a growing passenger-vehicle fleet without requiring every car sold in India to meet one identical mileage standard. The system changes the incentives facing automakers, while its effect on buyers will depend on how manufacturers distribute the cost of efficiency improvements across vehicle segments and technologies.
The norms will apply from April 1, 2027, to March 31, 2032, replacing the current CAFE II regime. The notified targets begin at 3.996 litres per 100 km in 2027-28 and tighten to 3.3273 litres per 100 km by 2031-32. Expressed in more familiar terms, the first figure is roughly equivalent to 25 km per litre and the final figure to about 30 km per litre. These are fleet-level equivalents, not promises that each individual vehicle will deliver those figures.
That distinction is central to understanding how CAFE works. A manufacturer receives one compliance outcome based on the average performance of the cars it sells. A relatively inefficient model can therefore be offset by more efficient vehicles elsewhere in the portfolio. CAFE III is consequently a rule about the direction and average performance of the new-car market, rather than a mandate that every buyer must choose a high-mileage car.
The framework also changes how that average is calculated. A proposed relaxation for cars weighing less than 909 kg, included in the September 2025 draft, has been removed. In its place, the final formula changes the slope used to determine targets according to vehicle weight. The result is a flatter curve: lighter vehicles receive relatively softer targets, while heavier vehicles face greater efficiency pressure.
The figures cited in the report show how material that change can be. Under the earlier proposal, the target for a relevant small car after the proposed relaxation would have been 54.1 grams of carbon dioxide per kilometre. Under the final formula, it becomes 63.7 grams per kilometre, providing nearly 18 per cent more headroom. This structure may be more manageable for manufacturers with small-car-heavy portfolios, including Maruti Suzuki, Renault and Nissan, while companies selling larger and heavier SUV fleets will have more efficiency improvement to find.
The weight formula therefore turns a seemingly uniform national standard into a differentiated market signal. The regulatory burden is not distributed equally across products. It is shaped by the composition of each manufacturer’s fleet, which means that business strategy, product mix and technology choices become as important as the efficiency of any single model.
Electric vehicles remain important compliance tools, but their advantage has been moderated compared with the earlier proposal. The draft had contemplated a four-times multiplier for battery electric vehicles. The final framework provides a three-times multiplier and extends compliance benefits to several other technologies. In practical terms, the sale of 10,000 battery electric vehicles can count as 30,000 vehicles in the CAFE calculation.
Range-extended electric vehicles also receive a three-times multiplier. Plug-in hybrids and flex-fuel strong hybrids receive 2.5 times, strong hybrids receive 1.6 times and flex-fuel vehicles receive 1.1 times. The framework also recognises ethanol-blended petrol, biofuels and compressed biogas through Carbon Neutrality Factors, while the number of recognised fuel-conservation technologies rises from four to 12.
These provisions broaden the definition of how a manufacturer can improve its compliance position. They also reduce the extent to which CAFE III operates as a single-technology mandate. Automakers can pursue battery electric vehicles, hybrids, flex-fuel vehicles, alternative fuels and other recognised technologies in combinations that suit their portfolios.
Randheer Singh, former Director of Electric Mobility at NITI Aayog and Founder of ForeSee Consulting, said the multiplier is “earned by label, not by capability”. His criticism, as reported by The Hindu BusinessLine, is that the multipliers are not explicitly graduated according to battery capacity, electric range or actual electric-driving capability. The concern points to a design question within the framework: whether different technologies receive compliance value in proportion to their real-world contribution to reduced fuel consumption and emissions.
Amit Bhatt, India Managing Director of the International Council on Clean Transportation, described the framework’s headline stringency as real but said the flexibilities “stack up”. The combined effect of super credits, fuel benefits and technology credits could make the practical compliance burden less severe than the headline target suggests. The distinction matters because a numerical tightening in the fleet target does not automatically translate into an equivalent reduction in fuel use across all vehicles on the road.
The compliance timetable is another significant change. Instead of calculating penalties annually, CAFE III creates two compliance blocks: one lasting three years and another lasting two years. A manufacturer can offset a deficit in one year with surplus performance within the same block. Better-performing original equipment manufacturers can also trade credits with those that fall short. The framework further provides for purchases of Bureau of Energy Efficiency credits at between ₹2,500 and ₹4,500 per gram of carbon dioxide per kilometre.
This structure gives manufacturers more room to manage the transition. A company that cannot meet its target in one year may have time to recover through better performance later in the compliance block, credit purchases or trades. From an industrial-policy perspective, that can reduce the disruption associated with abrupt annual penalties. From an emissions perspective, however, it means the timing of improvements may matter less to the regulator than the performance recorded across the relevant block.
The institutional design also places CAFE III between an efficiency standard and a market mechanism. The target is imposed at fleet level, but compliance can be shaped through credits and trading. The government is therefore not relying only on direct product regulation. It is creating a system in which manufacturers can choose the least costly combination of vehicle technologies, recognised fuels and credits, provided the overall fleet position meets the prescribed requirements.
That flexibility is particularly relevant to India’s uneven vehicle market. The report does not establish a single technology pathway for all manufacturers. Instead, the formula gives different incentives to small cars, heavier vehicles, electric vehicles, hybrids and alternative-fuel models. Manufacturers with different portfolios will therefore experience CAFE III differently, even when they operate under the same national rule.
For buyers, the most important conclusion is that CAFE III does not guarantee 30 km per litre from every new car. The approximately 30 km-per-litre figure is a fleet-level equivalent associated with the 2031-32 target. A buyer’s actual mileage will continue to depend on the specific vehicle, its weight, powertrain and operating conditions. The regulation’s immediate consumer effect is more indirect: it pushes manufacturers to improve the efficiency of the overall new-car portfolio and may influence which technologies and models they choose to sell.
The framework may also affect the competitive balance between vehicle categories. The flatter weight formula gives relatively softer targets to lighter vehicles and places greater efficiency pressure on heavier ones. At the same time, technology multipliers may help manufacturers use electric and hybrid sales to support compliance across their portfolios. The result is a regulatory environment in which product planning and portfolio composition become central to meeting the standard.
What CAFE III confirms is that India is moving towards a more demanding average-efficiency regime while retaining substantial implementation flexibility. The notified targets are stricter over the five-year period, but the framework allows manufacturers to combine several compliance tools rather than relying on one technology. That approach may make the transition more administratively workable, but it also makes the relationship between the headline target and actual fuel and emissions savings more complex.
The key developments to monitor will be how automakers adjust their model mix, how widely the recognised technologies and fuels are deployed, and how credit trading and multi-year compliance blocks operate in practice. The framework sets the rules from 2027 to 2032; its real effect will be visible in the technologies manufacturers sell, the efficiency of the vehicles buyers can choose, and the extent to which fleet-level improvements translate into lower fuel consumption and emissions.
