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BRSR Core Assurance Working Paper — Top 1000 Listed Companies

Reasonable-assurance working paper for the nine BRSR Core attributes mandated by SEBI for the Top 1000 listed companies by market capitalisation, applicable from FY 2026-27.

Free · ICAI AASB (June 2023)
Updated 2 Jun 2026
Source
SEBI (LODR) Reg. 34(2)(f) + BRSR Core
Standard
SSAE 3000 (Revised)
Applicability
Top 1000 listed cos by market cap
From
FY 2026-27 (reasonable assurance)
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Engagement details
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What’s inside

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BRSR Core — Independent Reasonable Assurance Working Paper

Engagement: Reasonable assurance over the BRSR Core attributes reported by ___ (PAN: ___) for the financial year ended ___.

Framework: SEBI (LODR) Regulations, Regulation 34(2)(f); BRSR Core annexure; SSAE 3000 (Revised) — Assurance Engagements Other than Audits or Reviews of Historical Financial Information.

1. Scope of Assurance

↑ Excerpt only — the full template is what you download as Word
About this template

What you’re downloading, and when to use it.

This template follows the format published by the Institute of Chartered Accountants of India (ICAI) in the AASB Audit Working Paper Templates (June 2023), the authoritative reference for Indian statutory-audit documentation. Fill in your firm’s letterhead and the engagement details on the form above, click Download Word file, and you’ll get a fully formatted .docx ready to use.

Everything is generated in your browser and on a stateless API endpoint — no account, no email gate, nothing stored. Edit freely in Word, Google Docs or Pages before sending to your client.

Common questions

FAQs.

Who needs BRSR Core assurance?
SEBI requires the Top 1000 listed companies by market capitalisation to obtain reasonable assurance on the nine BRSR Core attributes from FY 2026-27 onwards. The thresholds and effective date have been phased — initially top 150, then top 500, and now top 1000 — so check the latest SEBI circular for the exact applicability for your client.
What is the difference between BRSR and BRSR Core?
BRSR is the broader Business Responsibility and Sustainability Report disclosed in the annual report, covering nine principles across ESG. BRSR Core is a subset of nine key attributes (GHG, water, energy, circularity, gender diversity, inclusion, customer fairness, wages, employee well-being) that require mandatory reasonable assurance from an independent assurance provider. The remaining BRSR disclosures are voluntary for assurance.
Which standard governs the assurance engagement?
SSAE 3000 (Revised), "Assurance Engagements Other than Audits or Reviews of Historical Financial Information", issued by ICAI. The Standard sets out the requirements for engagement acceptance, planning, evidence gathering, conclusion and report. The CA firm must hold relevant subject-matter expertise (typically sustainability assurance training).
Can the statutory auditor also provide BRSR Core assurance?
Yes, subject to independence requirements under the Companies Act, 2013 and ICAI Code of Ethics. Many large CA firms position the BRSR Core assurance as a separate engagement with separate engagement letter and team, particularly for listed clients, to manage perceived independence risk. Independence questions should be assessed and documented as part of acceptance.
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