CAFE III Norms Take Effect From 2027
CAFE III Rules Push India Toward Cleaner Passenger Vehicles: The Ministry of Power has notified the third phase of Corporate Average Fuel Economy (CAFE-III) regulations for India’s passenger vehicle industry. The new framework will apply from April 1, 2027, to March 31, 2032.
CAFE-III requires automobile manufacturers to progressively improve the average fuel efficiency of their eligible passenger-vehicle fleets. The framework aims to reduce fuel consumption and CO₂ emissions while allowing manufacturers to use different technological pathways to achieve compliance.
Static GK fact: CAFE regulations were introduced in India in 2017 under the Energy Conservation Act, 2001. CAFE-II came into force in 2022.
Fleet Based Fuel Efficiency Targets
Unlike vehicle-specific emission standards, CAFE norms assess the weighted average performance of a manufacturer’s entire eligible fleet. CAFE-III covers M1-category passenger vehicles manufactured or imported for sale in India.
The new phase targets approximately 16.7% improvement in fuel efficiency over five years. The annual target is linked to the weighted average unladen weight of a manufacturer’s vehicles.
The formula is:
Annual average fuel consumption = a × (W − b) + c
Here, W represents weighted average vehicle weight, b is the reference weight and a is the weight-adjustment factor. Under CAFE-III, the reference weight rises to 1,229 kg, compared with 1,082 kg under the existing framework.
The baseline fuel-consumption target declines from 3.996 litres/100 km in 2027–28 to 3.3273 litres/100 km in 2031–32.
Small Cars Get Formula Based Relief
The treatment of lightweight cars was a major issue during the formulation of CAFE-III. The September 2025 draft had proposed an additional 3 g CO₂/km relaxation for petrol cars below 909 kg.
The final rules remove this separate concession. Instead, the revised weight-adjustment formula provides relatively favourable targets for lighter fleets.
For example, a small car’s target that could have been 54.1 g/km under the draft framework becomes 63.7 g/km under the notified rules. However, there is no separate regulatory category exclusively for vehicles below 909 kg.
Super Credits for Cleaner Technologies
CAFE-III introduces super credits to encourage manufacturers to adopt cleaner technologies. Battery electric vehicles (BEVs) and range-extended electric vehicles (REEVs) receive a volume derogation factor of 3, meaning one qualifying vehicle can receive the compliance value of three vehicles.
Plug-in hybrids and strong hybrids operating on flex-fuel receive a factor of 2.5.
The framework also recognises alternative fuels through carbon-neutrality factors. Vehicles using E20 or higher ethanol-blended petrol receive an 8% factor, while flex-fuel ethanol vehicles receive 22.3%.
Static GK Tip: E20 refers to petrol containing up to 20% ethanol by volume. Ethanol blending is intended to reduce petroleum dependence and support domestic biofuel production.
Credits and Technology Incentives
Manufacturers that exceed efficiency requirements can earn compliance credits, while those falling short accumulate debits. Credits may be carried forward within compliance blocks and traded between manufacturers.
Outstanding deficits can also be addressed through credit purchases from the Bureau of Energy Efficiency (BEE). The buyout price starts at ₹2,500 per g CO₂/km in 2027–28 and rises to ₹4,500 by 2031–32.
CAFE-III additionally recognises technologies such as start-stop systems, regenerative braking, efficient transmissions, motor-generators, LED lighting, advanced glazing and improved air-conditioning systems. Each qualifying technology can provide a claimed reduction of 1 g CO₂/km, subject to a maximum overall benefit of 9 g CO₂/km.
Significance for India
CAFE-III combines fuel conservation, emission reduction and technological flexibility. It can encourage investment in electric vehicles, hybrids, cleaner fuels and energy-efficient automotive technologies while giving manufacturers multiple compliance options.
The framework also has implications for energy security, as improved fuel efficiency can reduce petroleum consumption and India’s dependence on imported crude oil. Its effectiveness will depend on implementation, technology adoption, compliance costs and the affordability of cleaner vehicles.
Static Usthadian Current Affairs Table
CAFE III Rules Push India Toward Cleaner Passenger Vehicles:
| Fact | Detail |
| CAFE phase | CAFE-III |
| Implementation period | April 1, 2027 to March 31, 2032 |
| Governing legislation | Energy Conservation Act, 2001 |
| CAFE introduced in India | 2017 |
| CAFE-II | Effective from 2022 |
| Fuel-efficiency improvement | Approximately 16.7% |
| Reference weight | 1,229 kg |
| Baseline target in 2027–28 | 3.996 litres/100 km |
| Baseline target in 2031–32 | 3.3273 litres/100 km |
| BEV and REEV super-credit factor | 3 |
| Plug-in/strong flex-fuel hybrid factor | 2.5 |
| Technology incentive cap | 9 g CO₂/km |
| Compliance credit authority | Bureau of Energy Efficiency |
| Initial credit buyout price | ₹2,500 per g CO₂/km |
