How Indian Boards Should Set an ESG Materiality Threshold That Survives Auditor Challenge

Indian listed companies now face a sharper question than “do we have an ESG policy?” The question is: which topics did the board decide were material, on what evidence, and with what threshold? When the answer is a consultant’s heat map or a list of every topic that appears in a peer’s report, the assurance provider for BRSR Core has an easy finding. A materiality threshold that is written down, tested against both impact and financial effect, and minuted before the numbers are final is the cheapest defence against greenwashing accusations. This briefing is for boards, audit committees, and the finance and sustainability officers who prepare the papers.

The setting is India under the Business Responsibility and Sustainability Reporting framework, the phased BRSR Core assessment-or-assurance requirement, and the continuing pressure from lenders and large buyers who treat incomplete materiality as a data-quality issue rather than a disclosure style choice. The same discipline applies to unlisted groups answering European or Japanese customer questionnaires. Materiality is not a sustainability exercise that happens after the financial statements are closed. It is a control that should be in place before the first data request goes to plants and vendors.

1. Why a missing threshold is the easiest greenwashing claim an auditor can make

Greenwashing allegations rarely start with a false number. They start with selective silence. A company reports a large renewable-energy project and a community-school programme, then omits a high-intensity raw material or a safety metric that peers disclose. When asked why, management says the topic was “not material.” The assurance provider then asks for the paper that shows the topic was considered and rejected against a stated threshold. If that paper does not exist, or exists only as a slide deck from last year’s workshop, the finding is simple: the process does not support the claim that the omitted topic is immaterial.

Indian boards already see this pattern in financial reporting. Auditors challenge management’s materiality judgements on related-party disclosures, contingent liabilities, and segment reporting. The same professional scepticism now applies to BRSR Core attributes. Reasonable assurance (or the assessment route under Industry Standards Forum standards) requires the provider to understand how management decided which data are decision-useful and which are not. A board that cannot point to a minuted threshold is asking the provider to accept a judgement that has no recorded basis.

The cost of getting this wrong is not only an assurance qualification. Lenders screening climate risk in working-capital lines, and large buyers scoring supplier ESG questionnaires, treat an unexplained omission as a red flag. They assume the company either does not know the exposure or prefers not to measure it. Both readings are expensive.

Further reading on DrDPKlass: how finance teams should prepare BRSR Core for limited assurance and how boards should minute ESG oversight without treating the sustainability committee as theatre. Materiality sits between those two files.

2. What BRSR and BRSR Core actually require on materiality — and what they do not

SEBI’s BRSR framework expects companies to disclose topics that are material to their business and to stakeholders. It does not prescribe a single numerical threshold or a mandatory double-materiality methodology. BRSR Core, the subset of key performance indicators under nine ESG attributes that must be assessed or assured on a market-cap glide path, raises the evidentiary bar for those specific indicators. The board must still decide, for the wider BRSR, which additional topics merit disclosure and which do not.

Two practical consequences follow. First, the nine BRSR Core attributes (GHG footprint, water, energy, circularity, employee wellbeing and safety, gender diversity, inclusive development, fairness with customers and suppliers, and openness of business) are not optional even if a company believes one of them is immaterial to its model. The company still reports the required KPIs or explains why a particular metric is not applicable. Second, for every other topic — biodiversity impact, product end-of-life, data privacy, community resettlement — the company may omit the topic only if it can show a reasoned materiality judgement. Silence without a process is the risk.

The March 2025 SEBI circular that introduced the option of “assessment or assurance” did not lower the need for a documented materiality process. Assessment providers still need to understand the basis on which management prepared the information. A board that treats materiality as a sustainability-department exercise rather than a governance control will find the distinction between assessment and assurance less protective than it hoped.

3. Building a dual materiality map that finance and sustainability can both sign

Double materiality asks two questions. Impact materiality: does the company’s activity create a significant positive or negative effect on the environment or society? Financial materiality: does the topic create a reasonably possible effect on the company’s cash flows, access to capital, or enterprise value over the planning horizon the board already uses? Both lenses matter in India. Lenders and rating agencies care about financial effect. Civil-society and large-buyer questionnaires care about impact. A map that uses only one lens is incomplete.

A workable process for an Indian board is short. Start with a long list drawn from the NGRBC principles, peer BRSR filings in the same sector, and any topic already raised by a principal lender, buyer, or regulator. Score each topic on two simple scales — impact and financial — using evidence the company already holds: incident logs, energy and water intensity, wage data, customer complaints, and management’s own risk register. Do not wait for a full external stakeholder survey if one does not yet exist. Note the gap and plan it for the following year. The board can still set a provisional threshold on the evidence available.

Finance must co-sign the financial-materiality scores. Sustainability officers often over-weight impact and under-weight the actual effect on cash or capital. Controllers often do the reverse. A joint sign-off forces the conversation into the same language the audit committee already uses. The resulting map is then short enough for a board paper: topics above the threshold (with the metric that will be disclosed), topics below it (with the reason), and topics held for the next cycle because data do not yet exist.

A materiality map that only the sustainability team can explain is not a board control. It is a staff preference.

4. Setting quantitative thresholds that do not drift with every consultant

Qualitative heat maps are easy to produce and hard to defend. Quantitative thresholds are harder to set and easier to re-perform. A practical set for most Indian listed companies uses three cut-offs, all written down before the assessment begins.

First, a financial threshold aligned with the company’s existing materiality for financial reporting or with a stated percentage of revenue, profit, or assets. If a topic could reasonably affect more than that amount over the planning horizon, it is material on the financial lens. Second, an impact threshold based on absolute or intensity measures the company already tracks — for example, any safety metric that has produced a reportable incident in the last three years, or any water-withdrawal intensity that places a plant in the top quartile of its sector. Third, a stakeholder-request override: any topic specifically requested by a lender, a customer representing more than a stated share of revenue, or a regulator is treated as material for that cycle regardless of the other scores.

These thresholds should be stable. Changing them every year because a new consultant prefers a different scale is how year-on-year comparability collapses. If the board decides to tighten a threshold, the change is minuted with the reason and the effect on prior-year disclosures is assessed. Restatement of ESG data follows the same logic as restatement of financial data: disclose the reason and the quantitative effect.

Sector context matters. A steel company and a software company will not use the same absolute numbers. Both can still use the same structure: a financial percentage, an operational intensity or incident rule, and a stakeholder override. The structure travels; the numbers do not.

5. Documenting the process so board minutes survive assurance-provider questions

Assurance providers read minutes. They look for evidence that the board or the authorised committee actually considered the materiality judgement, not merely received a presentation. A usable minute is short and specific.

• The date the threshold note was circulated and the version number.
• The criteria and quantitative cut-offs that were applied.
• The topics that cleared the threshold and the principal metric that will be disclosed for each.
• The topics that were screened out and the one-line reason for each.
• Any topic the board asked management to re-examine or to begin measuring for the next cycle.
• The name of the officer who owns the data and the date by which the disclosure draft will return to the committee.

The sustainability committee (or the audit committee if the board has so assigned the work) should see the note before the numbers are locked. A materiality decision taken after the draft BRSR is already written is not a decision; it is a ratification of work already done. Providers notice the timing.

Independence of the assurance or assessment provider is a separate control, but it interacts with materiality. The provider will test whether the process was applied consistently. If the board minutes show that a high-intensity raw material was screened out solely because the data were inconvenient to collect, the provider has grounds to question the completeness of the disclosure. The minutes should show the opposite: the topic was considered, the data gap was acknowledged, and a plan to close it was recorded.

6. Five failure modes already visible in Indian BRSR filings

Public filings and assurance statements already show recurring patterns. Boards can check their own papers against them.

Heat-map only. A colourful matrix appears in the annual report or in a board pack, but no quantitative threshold or screen-out list is attached. The provider cannot re-perform the judgement.

Peer copying. The company discloses every topic that appears in the BRSR of its largest competitor, regardless of its own operations. The result is either over-disclosure that cannot be supported with data or the quiet omission of a topic the competitor also omitted.

Impact-only or finance-only. Sustainability scores topics solely on environmental or social severity; finance scores them solely on current-year profit effect. Neither map captures the topics that matter to capital providers over a three-year horizon.

Late process. Materiality is discussed after the draft BRSR has already been written by the sustainability team. The board is asked to approve rather than to decide. Providers treat this as weak governance over the disclosure.

Unstable thresholds. Cut-offs change every year with no explanation. Year-on-year comparisons become impossible, and any claimed improvement is open to the challenge that the boundary moved.

7. Field checklist before the next BRSR cycle

Use this list in the first board or committee meeting of the reporting year. It is short enough to complete in one sitting and specific enough to leave an audit trail.

1. Confirm the financial threshold (percentage of revenue, profit, or assets) and record it in the minute.
2. Confirm the impact rule (incident, intensity, or absolute) and the evidence source that will be used.
3. List any stakeholder requests already received from lenders, buyers, or regulators; apply the override.
4. Produce the long list of candidate topics from NGRBC, peers, and internal risk registers.
5. Score each topic on both lenses; require joint sign-off by finance and sustainability.
6. Write the screen-out list with one-line reasons and a review date for each item.
7. Identify data gaps for topics that cleared the threshold and assign owners and dates.
8. Circulate the one-page threshold note at least ten days before the decision meeting.
9. Minute the decision using the template above; attach the note as an annex.
10. Lock the threshold before plant and vendor data requests are issued.
11. Schedule a mid-year review only for new incidents or new stakeholder requests; do not reopen the whole map.
12. Archive the note, the scores, and the minute so next year’s provider can re-perform the judgement.

A board that completes this list has a materiality threshold that can be explained to an assurance provider, a lender, or a large buyer without relying on a consultant’s memory. The numbers that follow may still contain estimation and gaps. Those gaps will be disclosed against a process the board has already owned. That is the difference between a disclosure that survives challenge and one that does not.