Cheaper to run, but costlier to buy? New CAFE III rules kick in from April 2027; here's how your next car could be affected

A car that costs more to buy but less to run could become a more common choice as India prepares to introduce its next set of fuel-efficiency standards. From April 1, 2027, automakers will have to comply with stricter Corporate Average Fuel Economy (CAFE III) norms, which aim to improve the efficiency of passenger vehicles sold in the country.

The regulations will remain in force until March 31, 2032. Over these five years, manufacturers will have to progressively reduce the average fuel consumption of their vehicle fleets, potentially encouraging the development of more efficient petrol cars, hybrids, electric vehicles (EVs) and alternative-fuel models.

Notified by the Ministry of Power, the framework tightens fuel-consumption targets while offering incentives for cleaner technologies and ethanol-blended fuels. The fleet-average benchmark will decline from 3.996 litres per 100 km in 2027-28 to 3.3273 litres per 100 km in 2031-32, an improvement of around 16.7%.


But will these changes translate into lower running costs for car owners, or could the technology needed to meet the new standards make some models more expensive?

The answer will depend on how automakers adapt their product line-ups, the technologies they adopt and the vehicle consumers choose.

CAFE III norms: How will the new fuel-efficiency rules affect car buyers?

Under CAFE III, manufacturers must meet fuel-efficiency targets calculated on the average performance of their entire passenger vehicle fleet. The rules do not require every individual model to meet the same benchmark. Instead, automakers must consider the combined efficiency of the vehicles they manufacture or import for sale in India.

This could influence which models manufacturers prioritise, the technologies they invest in and the mix of vehicles they offer customers.

The managing director of Resurgent India Limited, Jyoti Prakash Gadia, said the new framework tightens efficiency requirements while introducing revised fleet-weighting rules and incentives for cleaner technologies.

“The primary modification made by CAFE III is to bring about increasingly stringent fuel economy pathway in conjunction with new fleet weighting and clean technology incentive provisions,” Gadia told TOI.

He added that the framework strengthens the earlier fleet-averaging system in response to rising car ownership and changes in automotive technology.

Pankaj Sharma, founder and managing director of K2 Infragen Limited, said stricter standards were necessary as the growing number of vehicles increased energy consumption. Improving transport efficiency could also help India reduce pollution and its dependence on oil.

For buyers, the regulations could encourage automakers to offer more fuel-efficient models. However, the actual savings will depend on the vehicle, driving conditions, annual mileage and prevailing fuel or electricity prices.

CAFE III does not guarantee a particular mileage figure or a reduction in running costs for every car. It sets fleet-level requirements for manufacturers, rather than prescribing the real-world efficiency of each model.

Will car prices increase under CAFE III?

Meeting the new standards could involve investments in more efficient engines, hybrid systems, electrification and other engineering improvements. These changes could increase the cost of developing and manufacturing certain vehicles, although the extent of any price impact will vary across manufacturers and technologies.

Gadia said the effect on prices would depend on the approach adopted by individual carmakers. Consumers, he expects, will continue to have several options, ranging from efficient petrol cars to hybrids, EVs and alternative-fuel vehicles.

“Efficient Engines, Comprehensive Electrification, and Engineering might raise the cost of certain models but this would be limited due to competitive pressure and expected economies of scale from increasing volumes,” he said.

Sharma also said the impact would differ between brands and technologies. While more efficient engines and other innovations could increase costs, competition and economies of scale could help contain the rise.

The regulations could also prompt manufacturers to reassess their product portfolios, particularly models that reduce the overall efficiency of their fleets. However, CAFE III does not mandate the elimination of petrol engines or require every manufacturer to adopt the same technology.

For consumers, the more important calculation could be the total cost of ownership rather than the initial showroom price. A vehicle with a higher upfront cost may prove more economical over several years if its fuel or electricity savings offset the price difference.

That calculation will depend on the initial price premium, annual mileage, energy costs, maintenance expenses and how long the owner keeps the vehicle.

CAFE III incentives for EVs, hybrids and flex-fuel cars

CAFE III gives manufacturers incentives to improve fleet efficiency through multiple technologies rather than relying on a single solution. Battery electric vehicles, hybrids and certain alternative-fuel models receive additional weight in fleet-compliance calculations through volume derogation factors, commonly known as super credits.

The notified framework provides the following factors:

• Battery electric vehicles (BEVs) and range-extended electric vehicles (REEVs): 3.0
• Plug-in hybrid electric vehicles (PHEVs): 2.5
• Strong hybrids running on flex-fuel ethanol: 2.5
• Strong hybrid electric vehicles (SHEVs): 1.6
• Flex-fuel ethanol vehicles: 1.1

These credits can make cleaner-technology vehicles more attractive to manufacturers when calculating their fleet averages. They could influence future investments and product launches, although the pace of adoption will also depend on vehicle costs, customer demand, charging infrastructure and fuel availability.

Gadia said the regulations would encourage manufacturers to consider EVs, hybrids and alternative-fuel vehicles as part of their efficiency strategies.

“Absolutely, the regulations make EVs, hybrids and alternative fuel vehicles more attractive as these cars are seen as helping overall fleet efficiency in the interest of sustainability,” he said.

However, he cautioned against assuming that the rules would force every automaker to abandon conventional engines.

“But it doesn’t imply that all car manufacturers will use only one trajectory and phase out regular engines,” he added.

Sharma said the incentives could encourage manufacturers to expand their electric, hybrid and alternative-fuel offerings. However, affordability, consumer demand and manufacturing capacity would continue to influence their decisions.

Infrastructure will also be an important consideration, particularly for consumers weighing an EV against a petrol or hybrid model.

“The role of infrastructure will be important for choosing convenient vehicles. It is hardly possible to call a good car convenient if there are no places where one could recharge or refuel it,” Sharma told TOI.

The availability of suitable vehicles and the infrastructure needed to operate them will therefore have to develop together. Carmakers will continue to assess market demand, investment costs, production capacity and infrastructure before deciding which technologies to prioritise.

Ethanol, CNG and alternative fuels get a role in CAFE III

The new framework also introduces a Carbon Neutrality Factor (CNF), which provides credits for certain renewable and lower-carbon fuels under specified conditions when calculating fleet compliance.

The treatment covers petrol vehicles using ethanol blends, flex-fuel ethanol vehicles and compressed natural gas (CNG) vehicles. The framework sets the following factors for tailpipe carbon dioxide emissions:

• Ethanol-blended petrol vehicles: 8%
• Flex-fuel ethanol vehicles: 22.3%
• CNG vehicles: 5% or the notified compressed biogas blending percentage, whichever is higher
• Diesel vehicles: Based on the applicable biofuel blending percentage

These provisions give manufacturers another route to meet their fleet targets alongside improvements in engine efficiency and electrification.

Dr CK Jain, president of the General Ethanol Manufacturers Association (GEMA), said recognising ethanol was significant because India's transition to cleaner mobility need not depend on electrification alone.

“Ethanol offers a domestically produced, renewable fuel pathway that can complement vehicle electrification, reduce dependence on imported crude oil and create sustained demand for agricultural feedstocks,” Jain said.

GEMA said the recognition could encourage investment in flex-fuel and electrified flex-fuel technologies. Wider adoption could also strengthen the domestic ethanol value chain and support farmers and rural industries by creating demand for agricultural feedstocks.

The association argued that cleaner transport was not just about reducing emissions. It could also help India strengthen energy security and build demand for domestically produced fuels.

However, the impact on consumers will depend on whether automakers introduce more compatible vehicles and whether the necessary fuels, servicing facilities and distribution networks are widely available.

12 fuel-saving technologies eligible for CAFE III incentives

CAFE III expands the list of recognised fuel-saving technologies from four to 12, allowing manufacturers to improve efficiency through components and systems beyond the powertrain.

The 12 eligible technologies are:

Start-stop systems

Tyre-pressure monitoring

Regenerative braking

Six-speed or higher transmissions

Efficient alternators

Motor-generators

Exterior LED lighting

Advanced glass and glazing

Electric water pumps

High-efficiency air-conditioning

Solar-reflective paint

Pulse-width-modulated radiator fans

Manufacturers can claim a reduction of 1g of CO2 per km for each eligible technology fitted to a vehicle, subject to a maximum reduction of 9g of CO2 per km. The Ministry of Road Transport and Highways will develop the certification methods.

The verification requirements will become stricter over the compliance period. During the first block, manufacturers can claim eligible savings through self-declaration. In the second block, claims must be supported by validated test results.

The approach allows carmakers to combine smaller efficiency improvements across their product portfolios without necessarily changing the underlying powertrain or requiring customers to switch to electric vehicles.

How CAFE III changes weight-based fuel-efficiency targets

The new norms revise the way vehicle weight influences fuel-consumption targets. The reference weight will rise from 1,082 kg to 1,229 kg, an increase of around 13.6%.

The revised target line is designed to make the applicable standard more sensitive to vehicle weight. Lighter vehicles will have relatively softer targets, while heavier vehicles will face tougher efficiency requirements under the revised framework.

The applicable target will be calculated using a formula based on the average unladen mass of vehicles manufactured or imported for sale in India. The constants used in the formula will change over the five-year period as the benchmarks become progressively stricter.

The rules also provide manufacturers with flexibility in meeting their obligations.

Carmakers that outperform their targets can earn credits and carry them forward within the relevant compliance block. Those that fall short can use eligible credits, exchange credits with other manufacturers or purchase credits through the Bureau of Energy Efficiency's buyout mechanism.

The buyout price will rise from Rs 2,500 per g of CO2 per km in 2027-28 to Rs 4,500 in 2031-32. Credit trading will take place during a designated annual window, with compliance assessed at the end of each block.

Manufacturers selling fewer than 1,000 eligible vehicles in a reporting period will be exempt from the fleet-average obligations.

What should car buyers consider before purchasing a vehicle after April 2027?

The CAFE III standards will apply to new passenger vehicles manufactured or imported for sale in India from April 1, 2027. However, their introduction does not automatically mean that every car purchased after that date will be cheaper to run.

Gadia advised buyers to assess their travel patterns and annual mileage before deciding whether the potential savings from a more efficient vehicle justify a higher upfront price.

“From April 2027, people must look into the total cost of owning the car in terms of financing, energy used, maintenance, insurance, and even reselling,” he said.

Sharma similarly recommended that consumers consider their travel requirements, budgets and access to infrastructure before choosing a vehicle.

For EV buyers, this means checking whether home charging is practical, how reliable public charging facilities are, what battery warranties cover and whether after-sales service is readily available. Those considering hybrids or alternative-fuel vehicles should also assess fuel availability and the reach of maintenance networks.

Sharma stressed that safety should remain a priority, as fleet-level efficiency standards do not mean every individual model will offer the same performance or reliability.

Gadia also advised EV buyers to examine access to dependable charging facilities and the battery warranty. For all vehicle types, insurance, maintenance, reliability and resale value will remain important parts of the ownership calculation.

The financial benefits will differ from one buyer to another. Someone who drives long distances every year may be better placed to recover a higher purchase price through lower energy bills. For someone who drives relatively little, the savings may take much longer to offset the initial premium.

Buyers should therefore compare the likely lifetime savings with the additional purchase cost instead of assuming that a more fuel-efficient car will always be cheaper overall.

Will CAFE III make your next car cheaper to run?

CAFE III is designed to improve the average efficiency of India's passenger vehicle fleet while giving manufacturers flexibility to choose from different technologies. The framework could encourage more efficient petrol cars, hybrids, EVs and alternative-fuel models, but its impact on buyers will depend on how automakers respond and how quickly these technologies become accessible.

A higher showroom price does not necessarily mean a more expensive car to own. Equally, a vehicle with better claimed efficiency will not automatically deliver lower costs in every driving situation.

For consumers, the key will be to look beyond the purchase price and compare expected fuel or electricity consumption, annual mileage, maintenance costs and resale value. The new rules may expand the choice of efficient vehicles available in India, but whether your next car is cheaper to run will ultimately depend on the model you choose and how you use it.