Sit with any sustainability lead who has been in the role for more than five years and ask her about BRSR. She will not start with the current format. She will start in 2011, with a slim document called the National Voluntary Guidelines on Social, Environmental and Economic Responsibilities of Business [L1-C1]. Everything about the current BRSR flows from that document. If you understand the arc, most of the format explains itself.
This lesson walks the arc. Four steps, fifteen years, one big idea.
Step one: NVG 2011
June 2011. The Ministry of Corporate Affairs publishes the National Voluntary Guidelines on Social, Environmental and Economic Responsibilities of Business, which everyone shortens to NVG or NVG-SEE. Voluntary. No filing obligation. No penalty for ignoring it. But the document sets out nine principles that are the direct ancestors of today's NGRBC principles you see in Section B and Section C of BRSR. Ethics, sustainable products, employee well-being, stakeholder engagement, human rights, environment, policy advocacy, inclusive growth, customer value. Read that list. It is the BRSR structure of 2025.
Why voluntary. Because in 2011 India did not have the infrastructure to mandate sustainability reporting. The GHG Protocol was published but not widely adopted here. Only a handful of Indian companies had a dedicated sustainability function. Assurance providers did not have the standards to sign off on it. The NVG was a signal, not a rule.
Step two: BRR 2012, mandatory for the top 100
Twelve months later, SEBI takes the NVG and turns it into a filing obligation for the top 100 listed companies by market capitalisation. This is called the Business Responsibility Report, or BRR. It becomes part of Regulation 34 of the LODR Regulations 2015 [L1-C2]. The BRR uses the same nine principles as the NVG but adds a filing template. Companies now have to answer questions, principle by principle, in a standard format that sits inside their annual report.
The BRR was, honestly, a starter document. Most companies filled it with marketing copy. Assurance was optional and almost nobody bought it. Rating agencies used the BRR data lightly. But two things happened during the BRR years that mattered. First, sustainability leads started existing at scale in Indian companies. Second, the format got expanded gradually to the top 500 and then the top 1,000 listed entities by market capitalisation.
Step three: BRSR 2021, the format overhaul
May 2021. SEBI issues Circular SEBI/HO/CFD/CMD-2/P/CIR/2021/562 [L1-C3]. The BRR is replaced by the Business Responsibility and Sustainability Reporting format. New name. Same nine principles. Very different depth. Where the BRR asked whether a company had a policy on employee well-being, BRSR asks how many hours of training, how many fatalities, what the wages ratio is between the median male employee and the median female employee. Where the BRR asked about environmental efforts, BRSR asks for Scope 1, Scope 2 and Scope 3 GHG emissions with the calculation methodology.
BRSR runs to about 150 pages when filled and unfolds across three sections. Section A is the corporate header — company identity, listing details, products, workforce, wages, turnover. Section B is the policy audit — does the company have a policy for each of the nine principles, is it Board-approved, does it cover the value chain. Section C is the number pack — principle-wise performance with Essential and Leadership indicators for each principle.
Voluntary for FY 2021-22. Mandatory for the top 1,000 listed entities by market capitalisation from FY 2022-23 [L1-C3]. That is the current filing perimeter.
Step four: BRSR Core 2023, assurance arrives
July 2023. SEBI issues Circular SEBI/HO/CFD/CFD-SEC-2/P/CIR/2023/122 [L1-C4]. Two things happen. First, SEBI carves out a subset of BRSR disclosures called BRSR Core. Nine key ESG attributes covering GHG intensity, water intensity, waste, wages, workforce diversity, wages paid to women, POSH complaints, human rights complaints, and community engagement. Second, third-party assurance becomes mandatory on those Core attributes. Reasonable assurance, not limited assurance. Under ICAI Standard on Sustainability Assurance Engagements SSAE 3410 [L1-C5].
The rollout is phased by market cap.
| Financial year | Threshold for reasonable assurance on BRSR Core |
|---|---|
| FY 2023-24 | Top 150 listed entities by market capitalisation |
| FY 2024-25 | Top 250 |
| FY 2025-26 | Top 500 |
| FY 2026-27 | Top 1,000 |
The same Circular introduces value chain reporting for the top 250 listed entities on a comply-or-explain basis from FY 2024-25, with assurance from FY 2025-26. Value chain means significant upstream and downstream partners, defined by monetary threshold in the Circular.
The rollout schedule above (top 150 / 250 / 500 / 1,000 by financial year) has not changed. What did change, in March 2025, is what the verification actually looks like. Read on.
Step five: March 2025 recalibration
Twenty-eight March 2025. SEBI issues Circular SEBI/HO/CFD/CFD-PoD-1/P/CIR/2025/42 [L1-C6], titled a "measures to facilitate ease of doing business" package. The Circular does not touch the market-cap rollout. It touches the mechanics of BRSR Core verification, the value chain reporting obligation, and adds a new voluntary disclosure item. Three moves.
Move one: assessment OR assurance. Before 28 March 2025, third-party reasonable assurance under ICAI SSAE 3410 was the only way to verify BRSR Core disclosures. The 2025 Circular introduces a second, parallel pathway: third-party ASSESSMENT under the industry standards formulated by the Industry Standards Forum (ISF, jointly constituted by ASSOCHAM, CII and FICCI under the aegis of the stock exchanges in consultation with SEBI) [L1-C7]. From FY 2025-26 the listed entity CHOOSES between the two. Same market-cap cohort, two verification paths, one signed by an ICAI-empanelled SSAE 3410 practitioner and the other signed by an ISF-empanelled assessor. Both count. Module 6 walks the choice with a decision matrix.
Move two: value chain reporting becomes voluntary. Under the 12 July 2023 Circular, value chain disclosure was comply-or-explain from FY 2024-25 for top 250 filers with assurance to follow from FY 2025-26. The 28 March 2025 Circular reclassifies value chain disclosure as VOLUNTARY from FY 2025-26, and value chain assessment or assurance as VOLUNTARY from FY 2026-27. The Circular also refines the value chain scope: upstream and downstream partners individually comprising 2 percent or more of purchases and sales by value, aggregated coverage may be limited to 75 percent. Module 8 lesson 5 walks the current voluntary regime and why sensible top-250 filers still disclose.
Move three: voluntary green credits disclosure. A new disclosure item is added covering green credits generated or procured by the entity under the Green Credit Programme. Voluntary, not mandatory. Adds a rating-agency signal without adding a filing burden.
Move four (companion to move one): no conflict of interest. Whether the entity picks assessment or assurance, the provider must have no conflict of interest with the listed entity. The 2025 Circular tightens this language explicitly [L1-C6].
Why the recalibration. Two years of BRSR Core assurance filings had shown that ICAI-empanelled SSAE 3410 capacity was concentrated among Big 4 and top-tier mid-market firms, driving fees up and squeezing timeline availability for top-500 and top-1,000 filers entering scope. ISF assessment opens a second market of qualified providers on a defined industry standard, without diluting rigour. The rollout schedule stays, the choice widens.
The big idea
The arc has one big idea. Sustainability reporting in India has moved from voluntary narrative to mandatory audited numbers over fifteen years. A company that reports "we care about the environment" in 2011 now has to report Scope 1, Scope 2 and Scope 3 emissions with the calculation methodology, and if it is in the top 500 by market cap, it has to hand the numbers to a verification provider (ICAI SSAE 3410 assurance provider, or ISF assessor from FY 2025-26 onwards) who will issue a public opinion on them.
Every question in the current BRSR format is there for a reason that traces back somewhere in this arc. When you find a row that looks strange or over-detailed, ask which policy signal it responds to. Almost always the answer is in the NVG-to-BRSR journey you just read.
Next lesson: who exactly has to file this thing, and how you check whether your company is in the cohort this year or is about to enter next year.