Carbon Accounting for Automotive Companies in India

India's automotive sector is undergoing rapid transformation, with major players like Maruti Suzuki, Tata Motors, and Mahindra & Mahindra driving innovation across manufacturing, supply chains, and vehicle electrification. All three are constituents of the SEBI top 1,000 listed companies, making them subject to mandatory carbon accounting and disclosure under the Business Responsibility and Sustainability Reporting (BRSR) framework.

For Indian automakers, carbon accounting has become a strategic imperative. Beyond regulatory compliance, accurate emissions measurement is essential for managing supply chain risk, attracting ESG-focused investors, and navigating India's climate commitments. This guide walks you through the specific carbon accounting challenges and opportunities facing the automotive industry.

Indian Auto Sector Emissions Context

The Indian automotive industry contributes significantly to the nation's transportation emissions. India's vehicle population exceeds 230 million units, and manufacturing accounts for substantial energy consumption across assembly plants, component factories, and logistics networks.

Major automakers face dual pressures:

• Regulatory compliance via BRSR mandatory disclosures
• Market expectations for aggressive emissions reduction aligned with India's Net Zero 2070 commitment

The sector's emissions profile is complex, spanning factory energy use, sprawling supplier networks, and the lifecycle emissions of millions of vehicles on Indian roads. Understanding this landscape is the first step toward effective carbon strategy.

Key Emission Sources for Automotive Companies

Manufacturing Process Emissions (Scope 1 & 2)

Factory operations represent a direct and measurable emissions source:

• Scope 1: Natural gas for heating, furnaces, and onsite power generation; diesel for forklifts and logistics vehicles
• Scope 2: Grid electricity for assembly lines, welding stations, painting booths, and facility operations

Indian automakers typically consume 800-1,200 MWh of electricity per 10,000 vehicles produced, depending on plant efficiency and technology.

Steel and Aluminium Supply Chain (Scope 3 Category 1)

Purchased materials represent the largest upstream emissions source for automakers:

• Steel accounts for 50-60% of vehicle weight and carries embodied emissions of 1.5-2.0 tonnes CO2e per tonne
• Aluminium (used in engines and structural components) has higher embodied emissions: 8-12 tonnes CO2e per tonne
• Supplier selection and material sourcing decisions significantly impact total carbon footprint

Many Indian automotive suppliers lack standardized emissions reporting, creating data collection challenges. Platforms like Greenio help automakers aggregate Scope 3 data from fragmented supply chains.

Vehicle Use Phase (Scope 3 Category 11)

The use phase of sold vehicles typically dominates an automaker's carbon footprint:

• A conventional petrol car emits 4-6 tonnes CO2e over its 10-year lifecycle
• For internal combustion engine (ICE) vehicles, use-phase emissions can represent 70-85% of total lifecycle emissions
• Automakers must account for customer driving patterns, fuel efficiency standards (CAFE), and regional electricity grids

This is where carbon accounting for manufacturing companies frameworks become essential for automotive supply chains.

BRSR Requirements for Indian Automakers

The BRSR framework mandates specific disclosures for listed companies, including all major Indian automakers:

Mandatory BRSR disclosures include:

• GHG emissions (Scope 1, 2, and material Scope 3 categories)
• Emissions intensity (per unit produced or per revenue)
• Targets and progress toward emissions reduction
• Governance and strategy for climate action

Indian automakers must align carbon reporting with Corporate Average Fuel Economy (CAFE) standards, which set fuel efficiency targets. CAFE compliance data directly feeds into Scope 3 Category 11 calculations, as vehicle efficiency directly determines use-phase emissions.

BRSR also requires narrative disclosure on:

• Climate risk assessment and adaptation strategy
• Supply chain emissions management
• EV transition roadmaps and investment
• Stakeholder engagement on climate

What is BRSR Reporting? provides detailed guidance on framework alignment with GHG Protocol standards.

EV Transition and Carbon Accounting Implications

The shift to electric vehicles fundamentally reshapes an automaker's emissions profile:

Use-Phase Emissions Reduction

Battery electric vehicles (BEVs) produce 50-70% lower lifecycle emissions than comparable petrol vehicles, even accounting for grid electricity mix. In India's evolving power sector (increasing renewable capacity), the advantage grows annually.

Supply Chain Emissions Amplification

EV production shifts emissions upstream:

• Battery manufacturing is energy-intensive, adding 20-30 tonnes CO2e per vehicle to Scope 3 Category 1 (purchased materials)
• Critical minerals extraction (lithium, cobalt, nickel) carries significant carbon and water impacts
• Automakers must now account for battery recycling and end-of-life emissions

The net result: while use-phase emissions decline dramatically, total lifecycle emissions initially may remain flat or increase slightly. However, as grids decarbonize and battery production scales, the advantage becomes clear.

CCTS and Automotive Component Manufacturers

The Carbon Credits Trading Scheme (CCTS) offers opportunities for Indian auto component suppliers:

• Component makers investing in energy efficiency or renewable energy can generate tradeable credits
• Suppliers to major automakers can monetize Scope 1 and 2 reductions
• CCTS participation incentivizes decarbonization across the supplier ecosystem

Smaller component manufacturers often lack dedicated carbon accounting resources; this creates demand for streamlined platforms capable of handling fragmented supply chains at scale.

FAQ

What BRSR disclosures are required for Indian auto companies?

Indian automakers must disclose Scope 1, 2, and material Scope 3 GHG emissions; emissions intensity ratios; science-based reduction targets; and qualitative information on climate governance, risk, and strategy. Disclosures align with GHG Protocol standards and must be externally assured.

How do I account for sold vehicle emissions under Scope 3?

Scope 3 Category 11 (use of sold products) is calculated by estimating the total fuel consumption across the vehicle fleet over its typical lifetime. Use average fuel efficiency (litres per 100 km), typical annual mileage, vehicle lifespan, and fuel carbon intensity (kg CO2e per litre). Multiply these factors to estimate total emissions per vehicle, then multiply by unit sales volume.

Does EV production reduce an automaker's carbon footprint?

Not immediately. While use-phase emissions drop dramatically (50-70% reduction), battery manufacturing and critical minerals extraction add substantial upstream emissions. Over the vehicle's lifetime, BEVs produce 40-60% lower total emissions. The advantage increases as electricity grids decarbonize.

Which auto companies are in SEBI top 1000?

Maruti Suzuki, Tata Motors, and Mahindra & Mahindra are the three largest Indian automakers and constituents of the SEBI top 1,000 list. All are subject to mandatory BRSR disclosures as of FY 2022-23.

When must Indian automakers disclose carbon emissions under BRSR?

BRSR disclosures are mandatory annually for SEBI top 1,000 companies. Companies must report FY 2025-26 emissions by April 2026 as part of their integrated annual report.

Conclusion

Carbon accounting for Indian automakers is no longer optional. BRSR mandates, investor pressure, and the inevitable EV transition require rigorous measurement of Scope 1, 2, and 3 emissions. The complexity lies in supply chain data aggregation, use-phase estimation, and EV transition accounting - areas where purpose-built platforms help automakers meet regulatory deadlines while building defensible, auditable emissions baselines.

As India's automotive sector evolves, first-mover advantage in carbon transparency will belong to companies that invest in accurate accounting systems today.