What Is Carbon Accounting? A Beginner's Guide for Indian Businesses

Carbon accounting is the process of measuring, tracking, and reporting the greenhouse gas emissions produced by an organisation, product, or activity. It sounds technical, but the core logic is straightforward: you cannot manage what you do not measure. For Indian businesses navigating BRSR reporting, CCTS compliance, and supply chain sustainability requirements from global buyers, carbon accounting is now a foundational capability.

The Three Scopes of Carbon Emissions

The GHG Protocol — the most widely used carbon accounting standard — divides emissions into three categories called scopes. Scope 1 covers direct emissions from sources your company owns or controls: the fuel burned in your boilers, vehicles, and generators; the process emissions from your chemical reactions; and fugitive gases from your refrigeration systems. Scope 2 covers indirect emissions from purchased electricity, heat, or steam. When you buy electricity from the grid, the power station burns fuel and emits carbon — those are your Scope 2 emissions. Scope 3 covers all other indirect emissions in your value chain — from the suppliers who make your raw materials to the customers who use and dispose of your products.

Why Carbon Accounting Matters More Than Ever for Indian Companies

Three forces are making carbon accounting mandatory for Indian businesses. First, SEBI's BRSR framework requires the top 1,000 listed companies to disclose Scope 1 and Scope 2 emissions with independent assurance by FY 2026–27. Second, India's Carbon Credit Trading Scheme (CCTS) sets binding emission intensity targets for eight major industrial sectors — companies that exceed their target must purchase carbon credits, and companies that beat it can sell credits. Third, international trade pressure is intensifying: the EU's CBAM mechanism will charge carbon costs on Indian exports in cement, steel, aluminium, and fertilisers from 2026.

How to Start Carbon Accounting: A Practical First Step

The starting point for any carbon accounting exercise is defining your reporting boundary. This means deciding which legal entities, operating facilities, and activities you will include in your measurement. Most companies use either the equity share approach (including entities in proportion to ownership) or the operational control approach (including all facilities where you control operations). Once your boundary is set, you collect activity data — fuel consumption records, electricity bills, production volumes, fleet mileage — and multiply each activity by its appropriate emission factor to calculate tonnes of CO2 equivalent. Csquare helps Indian businesses build their first carbon inventory from scratch, with methodology choices aligned to BRSR, CCTS, and international standards.