Carbon Accounting in India: The Complete Guide for 2025
Carbon accounting is now a legal requirement for India's listed companies — not just a sustainability aspiration. This guide covers everything Indian companies need to know: GHG Protocol methodology, India-specific emission factors, BRSR requirements, CCTS compliance, and how to choose the right carbon accounting software.
What is carbon accounting?
Carbon accounting— also called GHG accounting — is the systematic process of measuring, tracking, and reporting an organisation's greenhouse gas (GHG) emissions. It quantifies total emissions in tonnes of CO₂ equivalent (tCO₂e) across all emission sources.
For Indian companies, carbon accounting serves three critical regulatory purposes:
- BRSR Core compliance — SEBI mandates GHG disclosures (Scope 1, 2, and 3) for India's top 1,000 listed companies
- CCTS compliance — India's Carbon Credit Trading Scheme requires verified GHG emission intensity data
- Investor reporting — Institutional investors (FIIs, domestic MFs) increasingly require accurate carbon data before investment decisions
The GHG Protocol: carbon accounting methodology for India
India's BRSR framework and the CCTS are both aligned with the GHG Protocol Corporate Accounting and Reporting Standard— the world's most widely used GHG accounting framework, developed by the World Resources Institute (WRI) and World Business Council for Sustainable Development (WBCSD).
The GHG Protocol divides emissions into three scopes:
Direct
Scope 1
Owned/controlled sources — boilers, furnaces, vehicles, industrial processes
Electricity
Scope 2
Purchased electricity from the grid — calculated using CEA state-wise emission factors
Value Chain
Scope 3
All other indirect emissions — 15 upstream and downstream categories
For a full explanation of each scope, read our guide: Scope 1, 2 and 3 emissions explained.
India-specific emission factors for accurate carbon accounting
The most common mistake in carbon accounting is using global average emission factorsinstead of India-specific ones. India's power grid, fuel mix, and industrial processes have different emission intensities from the global average.
Key India-specific emission factor sources:
Central Electricity Authority (CEA)
Scope 2Publishes annual state-wise and national grid emission factors for electricity (CO₂/kWh). The 2023-24 national average grid EF is approximately 0.716 kg CO₂/kWh — but this varies significantly by state. Uttar Pradesh and Odisha grids are more carbon-intensive than Gujarat or Rajasthan (high renewables).
Bureau of Energy Efficiency (BEE)
Scope 1 & 2Provides sector-specific energy benchmarks for energy-intensive industries including cement, steel, aluminium, textiles, and chemicals — essential for PAT and CCTS compliance.
MoEFCC / GHG Platform India
Scope 1Publishes GHG emission factors for fuel combustion — coal, diesel, natural gas, LPG — adapted from IPCC 2006 guidelines for Indian fuel qualities.
IPCC (via GHG Protocol)
Scope 3For Scope 3 categories, IPCC emission factors are commonly used where Indian-specific data doesn't exist — particularly for business travel, freight, and waste disposal.
Carbon accounting requirements under Indian regulations
SEBI BRSR (LODR Regulations)
Mandatory GHG disclosure for top 1,000 listed companies. BRSR Core requires Scope 1, 2, and (from FY 2025-26) Scope 3 disclosures with third-party assurance.
Carbon Credit Trading Scheme (CCTS)
BEE-designated industries (cement, steel, aluminium, etc.) must track GHG emission intensity against assigned targets. Verified carbon accounting data is the basis for earning or needing to purchase carbon credits.
Perform Achieve and Trade (PAT) Scheme
Energy intensity targets set by BEE for large energy consumers. Energy accounting feeds directly into carbon accounting.
Carbon accounting software vs Excel — why spreadsheets fail
Most Indian companies still perform carbon accounting in Excel. This works for the first year. It fails at scale for five reasons:
Problem: No emission factor database
Excel users must manually look up CEA, BEE, and MoEFCC emission factors — and keep them updated each year.
Problem: Formula errors go undetected
A single broken Excel formula can corrupt an entire year of GHG calculations. Assurance providers routinely find errors in spreadsheet-based carbon accounts.
Problem: No audit trail
Excel doesn't record who changed what, when. BRSR Core assurance requires a complete data lineage — from source document to final emission figure.
Problem: Manual data entry from bills
Re-typing electricity and fuel bills into Excel is time-consuming and error-prone. Carbon accounting software with Bill OCR eliminates this entirely.
Problem: No Tally ERP integration
Indian companies run on Tally. Without Tally ERP integration, carbon accountants manually reconcile Tally ledgers with carbon data — duplicating work that software can automate.
How to choose carbon accounting software in India
When evaluating carbon accounting software for an Indian listed company, look for:
- India-specific emission factors from CEA, BEE, and MoEFCC — built in, not manual
- GHG Protocol Scope 1, 2, and 3 coverage — especially all 15 Scope 3 categories
- SEBI BRSR Core report generation — one-click, audit-ready
- Tally ERP integration — to eliminate manual data re-entry
- Bill OCR — to automate electricity and fuel bill data capture
- CCTS compliance module — for BEE-designated industries
- Multi-user workflow with role-based access and audit trail
- India data residency — compliant with DPDP Act 2023
- CA firm assurance portal — for BRSR Core third-party assurance
- Pricing in INR — not USD licensing costs that dwarf the BRSR fine
CarbonLens is the only carbon accounting software in Indiathat meets all of these criteria — built for India's mid-market listed companies from the ground up.