India is preparing for a major change in the way carmakers manage fuel efficiency and carbon emissions. The government's CAFE-III (Corporate Average Fuel Economy) norms will come into effect from April 1, 2027, and will remain applicable until March 31, 2032.

The new framework is designed to push passenger vehicle manufacturers towards cleaner and more fuel-efficient technologies while giving additional compliance benefits to electric vehicles, hybrids and alternative-fuel vehicles.

Unlike a rule that requires every individual car to meet exactly the same efficiency target, CAFE regulations assess the overall fleet performance of a manufacturer. This means the mix of vehicles sold by a company will become increasingly important.

Here are the major changes buyers and automakers should know about CAFE-III.

1. CAFE-III Will Start From April 2027

The third phase of India's Corporate Average Fuel Economy regulations will apply to M1-category passenger vehicles manufactured or imported for sale in India.

The regulations will cover a five-year period beginning April 1, 2027 and ending March 31, 2032. Manufacturers will have to manage the average fuel consumption and CO₂ performance of their eligible vehicle portfolios according to the new framework.

The targets are linked to the average unladen weight of a manufacturer's fleet. As a result, automakers with different vehicle mixes will face different fleet-level requirements.

2. Electric Vehicles Get the Biggest Super Credit

One of the most important elements of CAFE-III is the introduction of additional compliance value for cleaner powertrains.

Under the final framework, a battery electric vehicle (BEV) receives a volume derogation factor of 3.0. In simple terms, one eligible EV can count as three vehicles when the manufacturer's fleet performance is calculated.

Range-extender electric vehicles receive the same 3.0 factor.

This mechanism is intended to encourage manufacturers to increase the availability and sales of electric vehicles as they work towards meeting their overall fleet targets.

3. Strong Hybrids and Flex-Fuel Vehicles Also Receive Benefits

CAFE-III does not focus exclusively on battery-electric cars. Hybrid and alternative-fuel technologies also receive additional compliance benefits.

The final framework provides a 2.5x factor for plug-in hybrid electric vehicles and strong hybrids using flex-fuel ethanol. Conventional strong hybrids receive a 1.6x factor, while flex-fuel ethanol vehicles receive a 1.1x factor.

This means manufacturers can use a combination of technologies to improve their overall fleet compliance rather than relying on a single powertrain strategy.

For consumers, this could encourage carmakers to expand their hybrid and flex-fuel portfolios alongside their EV offerings.

4. Alternative Fuels Get Carbon-Neutrality Benefits

Another important part of the new regulations is the treatment of alternative fuels.

The framework provides carbon-neutrality benefits for certain fuel types, including higher ethanol-blended petrol, flex-fuel ethanol and CNG.

For example, vehicles capable of using E20 or higher ethanol-blended petrol receive an 8 percent carbon-neutrality factor. Flex-fuel ethanol vehicles receive a higher 22.3 percent factor, while CNG vehicles receive a 5 percent factor or the applicable CBG blending percentage, whichever is higher.

The idea is to recognise the potential emissions benefits associated with greater use of renewable and lower-carbon fuels.

5. Small Cars Do Not Get a Separate Special Concession

An earlier version of the CAFE-III proposal had included a special concession for certain small petrol cars weighing up to 909 kg.

That provision has been removed from the final rules.

Instead, the government has modified the broader weight-based formula used to calculate fleet-level targets. Therefore, smaller and lighter vehicle portfolios can still benefit from the structure of the formula, but there is no separate small-car exemption or fixed concession in the final framework.

This is an important change because India's small-car market has traditionally played a major role in manufacturers' overall fleet efficiency.

6. Fuel-Saving Technologies Can Also Help Manufacturers

CAFE-III also recognises certain technologies that can reduce fuel consumption and emissions.

Manufacturers can receive additional compliance relief for eligible technologies such as start-stop systems, tyre-pressure monitoring systems, regenerative braking, efficient transmissions, advanced alternators, LED lighting and other fuel-saving technologies.

The total benefit from these technologies is subject to a specified limit, preventing manufacturers from relying excessively on individual technology credits to meet their fleet targets.

CAFE-III: Key Provisions
 

What Could CAFE-III Mean for New Cars?

The biggest impact of CAFE-III is likely to be felt at the product-planning level.

Carmakers will have to consider the efficiency of their entire vehicle portfolio when planning future models. A company selling large numbers of petrol and diesel vehicles may need to balance those sales with more efficient powertrains and technologies.

This could result in greater investment in EVs, strong hybrids, plug-in hybrids, flex-fuel vehicles and fuel-saving technologies.

For buyers, the changes may eventually translate into a wider choice of cleaner powertrains. However, CAFE-III is primarily a manufacturer-level regulation, so it does not directly impose a new fuel-efficiency requirement on an individual car owner.

What Happens Next?

With the final CAFE-III framework notified, manufacturers have a defined regulatory roadmap covering the five-year period from 2027 to 2032.

The rules are expected to influence product development, powertrain strategy and technology investment across India's passenger vehicle industry.

Electric vehicles receive the strongest compliance advantage, but hybrids and alternative-fuel vehicles also receive recognition under the framework. This creates a broader technology pathway for manufacturers as they work to reduce the average emissions and fuel consumption of their fleets.

For Indian car buyers, the most visible effect may come over the next few years as automakers introduce more electrified, hybrid and alternative-fuel models to meet the changing regulatory requirements.