CAFE-III norms explained: What they mean for small cars, SUVs, EVs and hybrids

India’s passenger vehicle industry is heading towards a tougher fuel-efficiency regime, with the third phase of Corporate Average Fuel Economy (CAFE) norms coming into effect from April 1, 2027. The regulations will remain in force until March 31, 2032, requiring automakers to progressively improve the average fuel efficiency and emissions performance of their passenger-vehicle fleets.

So, what changes under CAFE-III and what does it mean for small cars, SUVs, EVs and hybrids?

What are CAFE norms?

CAFE norms set fleet-level fuel-consumption and CO₂ performance requirements for automakers. The rules do not require every individual car to meet the same efficiency target. Instead, the performance of a manufacturer's eligible vehicle portfolio is assessed on an average basis.

The new framework applies to M1-category passenger vehicles manufactured or imported for sale in India. This gives manufacturers some flexibility in determining their product mix while requiring the overall fleet to become progressively more efficient.

How much tougher are the new targets?

CAFE-III progressively raises the efficiency requirement over the five-year period. The fuel-consumption benchmark will fall from 3.996 litres per 100 km in FY28 to 3.3273 litres per 100 km in FY32, representing an improvement of around 16.7%.

The government has also revised the reference point used in the weight-based calculation. The reference weight rises from 1,082 kg under the existing CAFE regime to 1,229 kg under CAFE-III, an increase of around 13.6%.

The weight-based formula remains central to the framework, meaning vehicle weight will continue to influence the fleet-average target applicable to manufacturers.

Is there a special benefit for small cars?

No separate small-car concession has been retained in the final rules.

An earlier draft had proposed a 3 g CO₂/km benefit for qualifying petrol cars weighing up to 909 kg. That provision does not feature in the final framework. Instead, the government has modified the broader weight-linked formula used to determine the fleet target.

This means lighter vehicles continue to be treated differently through the weight-based structure, but there is no additional carve-out specifically for the lightest petrol cars.

How do EVs and hybrids benefit?

CAFE-III provides additional compliance value to cleaner powertrains through volume derogation factors, commonly referred to as super credits.

Battery electric vehicles (BEVs) and range-extended electric vehicles (REEVs) receive a factor of 3. Plug-in hybrid electric vehicles (PHEVs) and flex-fuel strong hybrids receive 2.5, while strong hybrid electric vehicles get 1.6. Flex-fuel vehicles receive a factor of 1.1.

The mechanism gives manufacturers greater compliance value for deploying eligible alternative-powertrain vehicles as they work towards their fleet-average targets.

What role will ethanol and CNG play?

The framework also recognises alternative and lower-carbon fuels through a Carbon Neutrality Factor.

Petrol vehicles using E20 or higher ethanol blends receive an 8% factor, while flex-fuel ethanol vehicles receive a 22.3% factor. For CNG vehicles, the factor is 5% or the notified CBG blending percentage, whichever is higher.

This gives manufacturers several routes to improve fleet-level compliance, rather than making electrification the only pathway.

Can technology help automakers meet the targets?

Yes. The list of recognised fuel-conservation technologies has been expanded from four to 12.

Automakers can claim a reduction of 1 g CO₂/km for each eligible technology, subject to an overall ceiling of 9 g CO₂/km. The recognised technologies include start-stop systems, tyre-pressure monitoring, regenerative braking, higher-speed transmissions, efficient alternators, LED lighting, advanced glazing, electric water pumps and high-efficiency air-conditioning systems.

What happens if a carmaker misses its target?

CAFE-III uses a credit-and-debit mechanism. Manufacturers that outperform their prescribed targets can generate credits, while those falling short can use eligible credits to bridge the gap.

Credits can be carried forward within the specified compliance blocks and exchanged or traded under the framework. Manufacturers can also purchase credits through the Bureau of Energy Efficiency.

The BEE credit price starts at ₹2,500 per gram of CO₂/km in FY28 and rises by ₹500 every year, reaching ₹4,500 in FY32. The first compliance block covers FY28-FY30, while the second covers FY31-FY32.)

What does CAFE-III mean for car buyers?

The immediate impact will be on automakers, which will have to decide how best to meet progressively tighter fleet targets. That could influence the technology mix and product strategies adopted by manufacturers, including greater use of hybrids, EVs, alternative fuels and efficiency-enhancing technologies.

For consumers, the eventual impact on prices, model availability and powertrain choices will depend on how individual carmakers respond.

From April 1, 2027, manufacturers will also report vehicle performance under both the Modified Indian Driving Cycle (MIDC) and Worldwide Harmonized Light Vehicles Test Procedure (WLTP). Manufacturers with annual sales below 1,000 units are exempt from fleet-average obligations.

The larger takeaway is that CAFE-III does not prescribe a single technology pathway. Instead, it gives automakers multiple compliance options while steadily raising the efficiency bar for India's passenger-vehicle fleet over the next five years.