BRSR Core Assurance
The independent assurance SEBI requires over the BRSR Core KPIs, phased by company size.
BRSR Core Assurance, without the jargon
SEBI mandates reasonable assurance over the BRSR Core, introduced on a glide path that began with the largest companies by market capitalisation and widens over subsequent years. Assurance means an independent provider tests the KPIs against evidence and reports on their reliability, raising the credibility of the disclosed numbers.

Why cfos act on this
- Reasonable assurance over the Core is a SEBI requirement, phased by market-cap rank
- Assured ESG data carries far more weight with investors and lenders
- Assurance readiness exposes data-quality gaps before they become findings
A clear, auditable process
- 01Readiness review
Test each Core KPI’s data trail against what an assurer will require.
- 02Remediate gaps
Fix control, documentation and methodology weaknesses ahead of fieldwork.
- 03Support the engagement
Coordinate evidence and responses through the assurance provider’s testing.
Climbing from self-declared to assured
SEBI requires reasonable assurance over the Core KPIs — the top of a credibility ladder that starts with unverified data.
SEBI sets reasonable assurance as the bar for the BRSR Core — the top of the ladder.
What you walk away with
An assurance-readiness gap report
A remediated evidence and controls trail
Coordination support through the assurance engagement
From our wider ESG & sustainability track record
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BRSR Core Assurance — questions we get
Straight answers on scope, applicability and how we deliver.
Talk to our ESG team →What is BRSR Core Assurance?
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How does Social Lab deliver BRSR Core Assurance?
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