What if our market cap drops out of the Top 1,000 mid-year?

SEBI’s general practice for LODR triggers is "in for the year, out from the next." Once a financial year begins with you in scope, complete that year’s compliance. From the following financial year, you’re out — though many entities continue voluntary BRSR Core Assurance for ESG-rating consistency.

Is there any extension or carve-out for first-time filers in Phase 3?

As of the most recent SEBI communications (early 2026), no formal first-year carve-out has been announced for Phase 3 entities. SEBI has historically allowed informal queries through the BSE / NSE listing departments for clarification questions, but the assurance requirement itself stands.

Can the same firm do statutory audit and BRSR Core Assurance?

Yes, but ICAI’s independence framework requires the assurance practitioner to assess threats. Many entities prefer separate firms for the two engagements to remove the question entirely. BatchWise’s partner-firm assignment screens for independence relative to your statutory auditor before assigning.

What does the XBRL filing actually look like?

See the XBRL Taxonomy for BRSR methodology page for the structure and a sample instance document fragment. The XBRL is generated alongside the signed PDF and submitted to BSE / NSE through the standard listing-portal workflow.

We’ve done full BRSR but never had it assured. What changes?

Three things change. First, evidence quality matters in a way it didn’t before — every Core attribute value must trace to a verifiable source document. Second, you’ll receive an audit opinion (clean, qualified, adverse, or disclaimer of opinion) which becomes part of the public BRSR. Third, your timeline tightens — most entities find that an assured BRSR runs 4–8 weeks longer than a self-disclosed one, depending on data readiness.

BRSR Core Deadline 2027 — Phase 3 Readiness for the Top 1,000

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What the SEBI BRSR Core mandate is

In its March 2023 circular (SEBI/HO/CFD/CFD-SEC-2/P/CIR/2023/122), SEBI introduced the BRSR Core — a subset of nine BRSR attributes that listed entities must subject to independent reasonable assurance before filing with the stock exchanges.

The BRSR itself (Business Responsibility and Sustainability Report) was already mandatory for the Top 1,000 listed entities by market capitalisation since FY 2022-23. What changed in 2023 was the assurance requirement: the nine Core attributes can no longer be self-disclosed without third-party verification.

The nine Core attributes cover GHG emissions, energy intensity, water intensity, waste recycled, employee wellbeing spend, female-employee wages, POSH complaints, smaller-town job creation, and revenue concentration with related parties. Full list with definitions is on the BRSR Core Assurance service page.

The phased rollout

SEBI did not impose BRSR Core Assurance on all 1,000 entities at once. The mandate was rolled out in three phases:

Phase	Applicability	First mandatory reporting year	Status (as of 2026)
Phase 1	Top 150 listed entities by market cap	FY 2023-24	Already filed twice (FY 2023-24, FY 2024-25)
Phase 2	Top 250 listed entities by market cap	FY 2024-25	First filing done (FY 2024-25), preparing FY 2025-26
Phase 3	Top 1,000 listed entities by market cap	FY 2026-27	Workpaper preparation due in 2026

If you're a Top 250 entity, your second mandatory year is the current cycle (FY 2025-26).

If you're a Top 1,000 entity outside the Top 250, your first mandatory BRSR Core Assurance is for FY 2026-27 — meaning the financial year starting 1 April 2026 and ending 31 March 2027. Your first signed assurance report and XBRL filing are due alongside your annual report for that year.

What "Top 1,000" actually means for you

SEBI determines Top 1,000 status by average market capitalisation for the relevant financial year, calculated using the methodology specified in the SEBI Listing Obligations and Disclosure Requirements (LODR) Regulations.

A few things this implies that are easy to miss:

Status can change year-on-year. An entity that was 1,005 in market cap last year and 980 this year enters the BRSR Core regime this year. Conversely, an entity that drops out of the Top 1,000 doesn't automatically exit — SEBI requires continued compliance for the year already begun.
It's market cap, not revenue. An IT services company with high market cap and modest revenue will be in scope; a large unlisted manufacturer with bigger revenue but no listing won't be.
Subsidiaries are not in scope unless separately listed. BRSR is filed at the listed entity level. If your unlisted operating subsidiary contributes most of the GHG emissions, those emissions roll up into the listed parent's BRSR Core data — but the assurance is over the consolidated values, not the subsidiary in isolation.

If you're unsure whether you're in the Top 1,000 for FY 2026-27, the NSE and BSE both publish updated Top-1000 lists quarterly based on market-cap rankings. Check the most recent published list.

Penalty schedule and enforcement

A non-compliant or incomplete BRSR Core filing falls under the SEBI LODR Regulations, 2015 enforcement framework. The relevant penalty mechanisms:

Stock exchange notice + monetary fine. Under the SEBI Standard Operating Procedure (SOP) for non-compliance with LODR, the stock exchange (BSE / NSE) issues a notice and levies a per-day penalty for delayed or non-compliant filings. Current SOP fine structures are published on each exchange's website and reviewed periodically.
SEBI adjudication. Persistent or material non-compliance can be referred to SEBI's Adjudicating Officer under Section 15A and Section 15HA of the SEBI Act, 1992 for monetary penalties.
Compounding and settlement. SEBI's Settlement of Administrative and Civil Proceedings framework allows entities to settle proceedings, but settlement amounts for governance/disclosure matters have generally trended upward.
Reputation cost. BRSR data feeds directly into the SEBI Sustainability Reporting platform and is consumed by ESG rating agencies (MSCI, Sustainalytics, S&P Global). Missing or qualified BRSR Core data routinely shows up in ESG scores within months.

The reputation cost typically dwarfs the monetary penalty in absolute terms. Sustainable index inclusion, foreign portfolio investor screens, and lender ESG covenants increasingly reference BRSR Core values.

Quarter-by-quarter readiness checklist (Phase 3)

If your FY ends 31 March 2027 and your first mandatory BRSR Core Assurance is for that year, here's the rolling preparation calendar.

Q1 FY 2026-27 — April to June 2026

Confirm Top 1,000 status (via current NSE / BSE list)
Identify the BRSR Core data owners internally — typically a triad of CFO (financial intensity ratios), HR head (employee wellbeing, POSH, female wages, smaller-town hiring), Plant / EHS lead (Scope 1+2 emissions, water, waste, energy)
Pull the Document Evidence Requirements checklist and audit your existing source-document quality. Common gaps: utility bills not centralised, payroll register without gender split, Tally chart of accounts without ESG-specific cost centres
Decide your assurance provider. If using BatchWise, book a scoping consultation — we'll confirm scope and assign a partner CA firm tentatively for Q4
Begin running monthly data captures of the nine Core values. The first year of monthly tracking is what makes the year-end engagement run smoothly

Q2 FY 2026-27 — July to September 2026

Resolve any structural data gaps surfaced in Q1 (Tally chart of accounts cleanup, gender-split fields in payroll, utility bill consolidation)
Confirm CEA grid emission factor for your operating regions (CEA Grid Emission Factors guide)
Run an internal dry-run BRSR Core calculation for H1 (April–September). Compare against any prior voluntary disclosure you've made. Surface internal anomalies now, not at year-end
Map your full operations to the NGRBC Principles so the qualitative disclosures (Section A and B) are also in flight

Q3 FY 2026-27 — October to December 2026

H1 dry-run results reviewed by CFO / audit committee. Any restatement of prior-year voluntary BRSR data done at this stage, not after assurance
Final partner CA firm confirmed for the Q4 assurance window. If using BatchWise, the engagement letter is finalised
Tally exports for H1 finalised and uploaded to the BatchWise workspace as a dry-run (not the final assurance run, but a calibration). Cleans up file-format issues before the Q4 crunch
Materiality assessment refresh — confirm the qualitative BRSR Core disclosures (e.g. POSH, smaller-town hiring) reflect any new operations, M&A, or restructuring during the year

Q4 FY 2026-27 — January to March 2027

Complete data capture for the full FY (the year-end month, March 2027, gets data captured by mid-April 2027)
Engagement starts in mid-April 2027 once March 2027 actuals are available. 72-hour BatchWise SLA from complete document upload
DSC-signed assurance report and XBRL instance document delivered ahead of the annual report filing deadline
Annual report is filed with the BSE / NSE; BRSR XBRL submission goes to SEBI's regulatory analytics portal

A note on voluntary early adoption

Many Phase-3 entities are choosing to do voluntary BRSR Core Assurance for FY 2025-26 — one year ahead of mandatory. The reasoning:

Surface and remediate data-quality issues in a low-stakes year before the mandatory filing
Demonstrate ESG governance maturity to lenders and ESG rating agencies a year early
Reduce the operational stress of doing your first regulated assurance in the same year as a board-level mandate landing

Voluntary engagements use the exact same workflow, methodology, and partner CA firms as mandatory engagements. The deliverables are equivalent. Pricing is the same.