BRSR Core assessment or assurance readiness: how to scope a pre-review

A BRSR Core readiness review should finish with a clear account of what the reporting team can support, what remains unresolved and who needs to act before the independent engagement. Agreeing that outcome at the start prevents a readiness exercise from becoming an open-ended collection of files.

This guide is for finance, sustainability and compliance teams planning advisory preparation before BRSR Core assessment or assurance. It covers the scope, responsibilities and handover of a pre-review. It does not describe an independent assessment or assurance opinion, and readiness support does not guarantee the outcome of that engagement.

Confirm the requirement and the reporting period

SEBI's 30 January 2026 LODR master circular, Chapter IV-B describes BRSR Core as a subset of BRSR metrics under nine ESG attributes. The assessment-or-assurance glide path reaches the top 1,000 listed entities by market capitalisation in FY2026–27. Confirm entity-specific applicability using the relevant rules rather than assuming a rank from an old list.

The entity's own BRSR Core requirement is distinct from value-chain disclosures. Under the same circular, value-chain disclosures for the top 250 are voluntary from FY2025–26, with their assessment or assurance voluntary from FY2026–27.

SEBI defines assessment as third-party assessment under standards developed by the Industry Standards Forum in consultation with SEBI. Check the applicable ISF reporting standards when agreeing criteria.

Record the exact reporting year, entity boundary, applicable formats and agreed criteria in the readiness brief. If the independent provider has already been selected, obtain its information requirements. Do not assume that a previous year's scope, a voluntary sustainability report or a customer questionnaire covers the same information.

Keep preparation and independent review responsibilities clear

Management owns the underlying information and approves the disclosures. A readiness adviser can help identify gaps, organise records and review data trails. The independent provider determines and performs its engagement under the agreed criteria and applicable requirements.

Provider selection also needs an independence check. SEBI's BRSR Core FAQs, Section V explain competence and conflict-of-interest considerations, including restrictions relating to consulting services to the listed entity or its group. Ask the appropriate company team and proposed provider to address eligibility before appointment.

Avoid describing a preparation adviser as the business's independent assurer. A readiness report should state its advisory purpose and limitations clearly, including whether work was document-based, sample-based or limited to particular indicators.

Agree a written scope with six decisions

A useful readiness brief answers:

1. Coverage: which disclosures, entities, sites and periods are included?

2. Criteria: which reporting definitions, calculation methods and versioned requirements will be used?

3. Inputs: which draft disclosures, workbooks and source records will management provide?

4. Procedures: will the work include walkthroughs, selected recalculations, consistency checks or document indexing?

5. Responsibilities: who answers questions, decides methodology issues and approves corrections?

6. Handover: what findings, unresolved items and revised records will be delivered, and by when?

If the review examines selected records, say how they were chosen and what that selection cannot establish. A successful walkthrough of one site or one indicator should not be presented as confirmation of the full reporting population.

Reserve time for management to resolve questions and for a second check of changed records. A deadline that allows only file collection can produce a well-organised folder with the same unresolved problems inside it.

Run a process walkthrough before checking every number

Choose an indicator and ask its owner to show the full reporting process: where the data originates, how it is aggregated, what definitions apply, who reviews it and how the approved result reaches the disclosure.

Then ask where the process could fail. Is a site omitted from the request? Does an HR extract include a different worker population from the disclosure definition? Can someone overwrite an approved formula? Are late corrections communicated to the reporting team?

These questions complement the source-document checks in our BRSR evidence-file guide. The pre-review should test whether the process can be repeated and controlled, as well as whether selected records can be found.

A hypothetical coverage gap

This example is illustrative and does not describe a Nitium engagement.

A draft disclosure of gross wages paid to females as a percentage of total wages uses a payroll extract covering only head office. During the walkthrough, the reporting team finds that two operating sites inside the agreed reporting boundary are absent. The evidence issue is therefore a coverage question, not merely a missing signature.

The readiness finding records the required wage definitions, the extract's actual coverage, the responsible owner and the reconciliation needed. The team checks both gross wages paid to females and total wages across the relevant population before recalculating the percentage. The draft remains marked for review until management resolves the scope and approves the supported disclosure.

Use a findings register that leads to closure

Give each finding an identifier and record the affected disclosure, evidence examined, issue, possible reporting effect, owner, due date and proposed closure evidence. Separate missing records, inconsistent definitions, calculation errors and unresolved judgments. They need different responses.

For example, a missing source file may require retrieval; an inconsistent definition may require agreement across HR and reporting; a changed factor may require recalculation of dependent outputs. Use statuses such as open, response received, retest needed and closed with evidence. “Management informed” is not a closure test.

Keep a version log showing which disclosure and workbook changed. Preserve the basis for estimates and methodology decisions. The 28 March 2025 SEBI circular explicitly addresses disclosure of methodology changes, industry-specific adjustments and estimates within the BRSR Core framework.

Prepare a controlled handover

The final readiness pack should contain the agreed scope, reviewed disclosure version, evidence index, calculation references, findings register and unresolved decisions. Tell the independent provider about known limitations through the agreed channel rather than allowing them to disappear into a polished report.

Nitium's ESG assurance-readiness service covers advisory evidence and data-trail preparation. Discuss a readiness review with your reporting period, draft status and intended independent engagement. Nitium's services described on this site do not include independent assessment or assurance opinions.

Reviewed 3 October 2026. This is a practical preparation guide, not a legal opinion or a substitute for the applicable reporting and engagement requirements.