India's BRSR Core: The Mandatory Sustainability Disclosure Framework That Is Building India's Industrial GHG Data Infrastructure
BRSR Core is SEBI's assured-disclosure sub-framework, rolling out in phases from the top 150 listed companies (FY2023-24) to the full top 1,000 by FY2026-27. It requires reasonable assurance on nine core ESG attributes, including Scope 1 and Scope 2 GHG emissions and a defined value-chain disclosure. For industrial companies that are also CCTS obligated, the two frameworks draw on overlapping plant-level emissions data, though they differ in boundary, verification standard, and recipient. Building that data capability once has knock-on benefits for CBAM documentation and EU customer data requests.
What BRSR Core actually requires
Key Facts
- The Business Responsibility and Sustainability Report (BRSR) was introduced by SEBI in 2021, replacing the earlier Business Responsibility Report, and became mandatory for the top 1,000 listed companies from FY2022-23. BRSR Core, introduced in 2023, is a more demanding sub-set requiring assured (third-party verified) disclosure of nine core ESG attributes spanning greenhouse gas emissions, energy, water, waste, gender diversity and pay parity, employment generation, and other NGRBC-aligned indicators.
- BRSR Core assurance follows a phased "glide path" by market capitalisation: the top 150 listed entities from FY2023-24, the top 250 from FY2024-25, the top 500 from FY2025-26, and the full top 1,000 from FY2026-27. A company's obligations depend on where it sits on this glide path in the relevant financial year.
- Within the GHG attribute, BRSR Core requires total Scope 1 emissions, total Scope 2 emissions (both location-based, using a national average grid emission factor, and market-based, using the emission factor of contracted electricity), and GHG intensity per unit of revenue. SEBI has separately introduced a value-chain disclosure requirement for larger companies, covering select upstream and downstream partners. This is narrower than a blanket Scope 3 mandate, is being phased in gradually, and was eased to a "comply or explain" / voluntary basis for value-chain items in a March 2025 circular.
- Reasonable assurance is a higher verification standard than the limited assurance typically used for voluntary ESG disclosures, involving more extensive testing and evaluation of internal controls. It is sometimes compared, loosely, to the rigour of a financial audit but the two are not formally equivalent, and BRSR Core assurance providers are SEBI-recognised assurance firms rather than a defined shortlist of specific auditors.
- Non-compliance with BRSR Core disclosure or assurance requirements may attract SEBI regulatory action under its standard listed-company enforcement framework. The specific financial or procedural penalties are set out in SEBI's regulations and circulars and should be checked directly with a qualified advisor rather than assumed from general commentary.
Why this matters for CCTS obligated companies
For the subset of large industrial companies that are both on the BRSR Core glide path and separately obligated under CCTS, the two frameworks are not identical, but they draw on related underlying data. Both require Scope 1 and Scope 2 GHG measurement and third-party verification. Both concern the same physical activities, fuel combustion, process emissions, and purchased electricity, even though they are measured, aggregated, and verified differently. BRSR Core reports at the consolidated company level to SEBI, with reasonable assurance; CCTS reports at the individual plant or facility level to BEE's ICM Registry, with limited assurance from an accredited ACVA. Companies that design their plant-level GHG measurement systems with both reporting boundaries in mind, from the outset, can avoid duplicating data-collection effort, though reconciling facility-level CCTS data into a consolidated, revenue-intensity BRSR Core figure still requires deliberate aggregation and boundary work, not a simple pass-through.
This overlap is most relevant to companies that sit at the intersection of both frameworks; it should not be read as a claim that all industrial companies, or all BRSR Core-applicable companies generally, benefit equally. Companies outside CCTS scope, or below the current BRSR Core glide-path threshold, face a different, typically lighter near-term compliance picture.
BRSR Core vs CCTS MRV: where they overlap and where they diverge
| Dimension | BRSR Core (SEBI) | CCTS MRV (BEE) | Integration Consideration |
|---|---|---|---|
| GHG Scope | Scope 1, Scope 2 (location- and market-based), plus a defined value-chain disclosure for applicable companies | Scope 1 direct + Scope 2 grid electricity (gate-to-gate GEI) | Scope 1 and Scope 2 data sources are related across both frameworks; value-chain disclosure is BRSR-specific and narrower than full Scope 3 |
| Reporting boundary | Consolidated company (all facilities in financial consolidation) | Individual plant or facility (each CCTS obligated unit separately) | CCTS plant data can inform a BRSR company total, but boundary reconciliation is a deliberate step, not automatic |
| Verification standard | Reasonable assurance (higher rigour than limited assurance) | Limited assurance (ACVA third-party verification) | CCTS limited assurance does not automatically satisfy BRSR Core's higher assurance bar, upgraded procedures are typically needed |
| Verification frequency | Annual (with the Annual Report) | Annual (ahead of the CCTS compliance deadline) | Both are annual cycles, which creates scheduling, though not automatic scope synergies |
| Verified by | A SEBI-recognised sustainability assurance provider | A BEE-accredited ACVA | Some firms may hold both recognitions worth checking directly with prospective assurance providers |
| Primary recipient | SEBI, via the Annual Report and stock exchange disclosure | BEE, via the ICM Registry, feeding into CCC compliance determination | Different recipients and purposes — a company's underlying data can support both filings |
| Intensity metric | GHG intensity per rupee of revenue | GHG emission intensity per unit of physical output | Converting between the two requires production and revenue data alongside the emissions figure |
A note on CBAM and CSDDD: related but separate regimes. BRSR Core, CBAM, and the EU's Corporate Sustainability Due Diligence Directive (CSDDD) are distinct regulatory regimes with different legal bases, jurisdictions, and enforcement mechanisms — they are not interchangeable, and BRSR Core compliance does not itself satisfy CBAM or CSDDD obligations. What connects them is overlapping data needs.
BRSR Core's value-chain disclosure requirement covering select upstream and downstream partners for larger companies can help Indian industrial exporters build the kind of verified emissions data that their EU customers are increasingly asking for as part of those customers' own sustainability reporting. The CSDDD, phasing in for large EU companies from 2025 to 2027, pushes EU steel users, auto manufacturers, and construction firms to understand and manage emissions embedded in their supply chains; Indian suppliers are not directly regulated by CSDDD, but may face growing requests from EU customers for supplier-level emissions data as a practical consequence. Companies that build reliable, assured value-chain emissions data through BRSR Core are, in that sense, building a useful capability for EU customer engagement and CBAM-related documentation rather than executing a formal compliance bridge to either regime.
Frequently Asked Questions
What are the nine BRSR Core attributes that require reasonable assurance?
BRSR Core organises its assured disclosures around nine core ESG attributes, translated into a defined set of KPIs (commonly cited as around 49) covering: greenhouse gas emissions and intensity, energy consumption and intensity, water consumption and intensity, waste management, employee well-being and gender diversity, pay parity, job creation, business openness and value-chain engagement, and other NGRBC-aligned indicators. Of these, the GHG, energy, water, and waste attributes carry the most significant data infrastructure implications for industrial companies, since they require systematic, auditable measurement rather than narrative reporting.
Does BRSR Core require full Scope 3 emissions reporting?
No. BRSR Core's GHG attribute centres on Scope 1 and Scope 2. SEBI has separately introduced a value-chain disclosure requirement for larger, applicable companies, covering select upstream and downstream partners, this is a narrower, phased obligation, not a blanket requirement to report across all Scope 3 categories, and elements of it were eased to a voluntary or "comply or explain" basis in a March 2025 SEBI circular. Companies should confirm current applicability and scope against SEBI's latest circulars rather than treating this as a fixed, one-time requirement.
How does BRSR Core's location-based vs market-based Scope 2 distinction relate to CBAM?
BRSR Core asks companies to disclose both location-based Scope 2 (using a national average grid emission factor) and market-based Scope 2 (using the emission factor associated with contracted electricity, which can be lower where verified renewable power purchase agreements exist). CBAM's embedded-emissions calculation uses its own methodology for the electricity actually consumed at a facility, which does not map one-for-one onto either BRSR figure. Companies should treat BRSR Core's Scope 2 figures as a useful data input for CBAM preparation, not as a direct substitute for CBAM's own calculation methodology, and should verify the applicable rules directly rather than assuming equivalence.
Sources
- SEBI — BRSR Framework notification and BRSR Core circulars, including the phased glide-path schedule and March 2025 value-chain disclosure update
- SEBI — BRSR Core assurance requirements and guidance for assurance providers
- Bureau of Energy Efficiency — CCTS MRV methodology and ICM Registry procedures
- European Commission — CSDDD — EU Corporate Sustainability Due Diligence Directive, phase-in timeline and scope
- European Commission — CBAM — embedded emissions methodology and reporting obligations
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