Double Materiality Assessment Under CSRD: A Practical Guide for Manufacturers
A double materiality assessment is the mandatory first step of CSRD reporting under ESRS 1: it requires a company to evaluate sustainability topics from two independent angles — financial materiality (risk or opportunity to the company) and impact materiality (the company's effect on people and the environment) — and report on any topic that is material under either lens. For manufacturers, getting this assessment right is not a formality; it is the foundation that determines what the rest of the CSRD report must cover, and a flawed assessment is one of the most frequently cited findings in sustainability assurance.
Why the materiality assessment comes first
CSRD does not ask companies to report on every sustainability topic under the sun. Instead, ESRS 1 (the general requirements standard within the European Sustainability Reporting Standards) establishes double materiality as the gating mechanism: a company only reports in detail on the topics its assessment identifies as material. Everything downstream — which topical standards apply (climate, pollution, workforce, resource use, and so on), what data points must be disclosed, and where the narrative should focus — flows from this exercise. Skip or rush it, and the entire report risks being built on the wrong foundation.
For a manufacturer, this is especially consequential. Manufacturing businesses typically sit at the centre of long, complex value chains — raw material extraction upstream, energy- and resource-intensive operations in-house, and a product that continues to have environmental and social consequences long after it leaves the factory gate. That breadth of potential impact is exactly why the assessment has to be done properly rather than treated as a checkbox exercise.
The two dimensions of materiality
"Double materiality" means a topic can qualify for inclusion in the report through two separate, non-exclusive routes.
Financial materiality
A sustainability matter is financially material if it creates, or could reasonably be expected to create, a financial risk or opportunity for the company — affecting its cash flows, access to finance, cost of capital, or overall value over the short, medium, or long term. For a manufacturer, this might include exposure to carbon pricing, resource scarcity affecting input costs, or physical climate risk to a production facility.
Impact materiality
A matter is materially impactful if the company causes, contributes to, or is directly linked to actual or potential effects on people or the environment — positive or negative — regardless of whether those effects translate into financial consequences for the company. This is an "outside-in" question turned "inside-out": what does the company do to the world, not just what the world does to the company.
The critical practical point is the word "or." A topic is material and must be reported on if it clears the threshold on either dimension — it does not need to be material on both. A manufacturer might have a workforce health and safety issue that carries little direct financial risk to the company itself but represents a significant impact on employees; under double materiality, that topic is still reportable. Conversely, a topic with clear financial exposure but limited direct impact on people or the environment is also reportable. Assessing only one dimension, or requiring both to be present before including a topic, is a fundamental misapplication of the standard.
The practical process for a manufacturer
While the exact methodology a company chooses can vary, manufacturers generally work through a broadly consistent sequence of steps.
1
Map the value chain.
For a manufacturer this typically spans three zones: upstream (raw materials, component suppliers, sub-contractors), own operations (production sites, energy use, workforce), and downstream (distribution, product use by customers, and eventual disposal or end-of-life treatment). Each zone can surface different material topics — a supplier-side labour issue looks very different from an in-house emissions issue or a downstream product-disposal impact.
2
Identify candidate topics against the ESRS topic list.
The ESRS set out a structured list of sustainability topics and sub-topics covering environmental, social, and governance areas. The value chain map is used to screen which of these topics are plausibly relevant to the company's specific activities and context, generating a longlist of candidates for further assessment rather than assuming every topic applies equally.
3
Engage stakeholders.
Views from workers, suppliers, customers, investors, local communities, and other affected or interested parties inform both the identification of topics and the scoring of their significance. Stakeholder input helps surface impacts that internal teams might otherwise overlook, particularly further down the value chain where visibility is naturally lower.
4
Score each topic on both dimensions.
Each candidate topic is assessed separately for impact materiality (scale, scope, and irremediability of the impact, and likelihood if potential rather than actual) and financial materiality (likelihood and magnitude of financial effect). A topic passing the threshold on either scoring is carried forward as material.
5
Document the reasoning.
The assessment itself — the process followed, the topics considered, the scoring rationale, and the stakeholder input used — must be disclosed as part of the CSRD report and is itself subject to assurance. A verbal or informal judgement is not sufficient; the reasoning trail needs to be documented in a way that a third party can follow and verify.
Why this matters practically
Two failure modes sit on opposite sides of the same risk. Omitting a topic that should have been assessed as material — because the value chain mapping was too shallow, stakeholder input was skipped, or a topic was screened out without adequate justification — is one of the most common findings raised in sustainability assurance and audit reviews. It undermines the credibility of the entire report and can trigger a broader review of the company's reporting process. On the other side, over-including topics that are not genuinely material spreads reporting effort thin, dilutes the narrative on the topics that actually matter, and creates unnecessary data collection burden across the organisation without a corresponding benefit in decision-useful disclosure.
For manufacturers specifically, this balance is harder to strike than in many service industries, simply because the value chain is longer and the physical footprint — energy, materials, emissions, waste, worker safety — is larger and more varied. A well-run assessment does the work of separating what is genuinely material to the business from what is merely plausible, and documents why.
This is precisely the kind of question — "which ESRS topics did we determine were material, and on what basis?" — that becomes difficult to answer quickly once a company has years of reporting cycles, multiple facilities, and a growing library of internal assessments and supporting evidence. IgeraIndustria is built for exactly this scenario: it answers directly from a company's own compliance and quality documents, citing the exact source, so that when an internal team, auditor, or manager needs to trace back a materiality decision, the evidence is retrievable in seconds rather than buried in a shared drive.
Common mistakes to avoid
- Treating it as a one-off exercise. Materiality is not assessed once and filed away — value chains, regulation, and business activities change, and the assessment needs to be revisited and updated over time.
- Requiring both dimensions before including a topic. As above, a topic material on either financial or impact grounds must be included — treating the "or" as an "and" is a structural error in the methodology.
- Under-investing in the downstream value chain. It is often easier to assess upstream suppliers and own operations than what happens after a product is sold and used, but downstream impacts (product use, end-of-life, disposal) can be some of the most significant for a manufacturer.
- Weak or missing documentation. Since the assessment itself is disclosed and subject to assurance, a judgement that is not written down with clear reasoning is difficult to defend under review.
- Skipping stakeholder engagement or treating it as a formality. Superficial engagement tends to miss the impacts that internal teams are least well positioned to see themselves.
A note on regulatory evolution: The precise scope of CSRD, including which companies fall within its reporting obligations, the exact assurance requirements, and associated thresholds, is currently subject to change under the EU's ongoing "Omnibus" simplification process. Details that were fixed at the time of the original CSRD text are actively being revised, and the final requirements applicable to any given company may differ from earlier expectations. This article describes the general logic of double materiality as set out in ESRS 1; it does not state specific assurance levels, exact thresholds, or applicability dates, because these are precisely the elements under active negotiation. Always confirm current requirements with a qualified advisor before relying on any specific figure or deadline.
Frequently asked questions
Does a topic need to be material on both financial and impact grounds to be reported?
No. Under double materiality, a topic is reportable if it is material on either dimension alone — financial materiality or impact materiality. Requiring both is a common but incorrect interpretation of ESRS 1.
Who should be involved in a manufacturer's materiality assessment?
Typically a cross-functional group spanning sustainability, finance, operations, procurement, and legal/compliance, combined with structured input from external stakeholders such as workers, suppliers, customers, and affected communities. Relying on a single function in isolation tends to produce blind spots.
How often does the assessment need to be updated?
It is not a one-time exercise. As the business, its value chain, and the regulatory environment evolve, the assessment should be revisited so that the list of material topics continues to reflect the company's actual circumstances.
What happens if a material topic is omitted from the report?
Omitting a genuinely material topic is one of the most frequently identified issues in assurance reviews of sustainability reports. It can undermine confidence in the report as a whole and may require rework of the assessment and disclosure.
Does the value chain mapping need to cover product disposal and end-of-life?
For most manufacturers, yes — downstream impacts including product use and disposal are part of the value chain that needs to be considered, and can surface material topics that are easy to overlook if the assessment focuses mainly on upstream suppliers and internal operations.
Is the materiality assessment itself audited?
The assessment and its underlying reasoning are disclosed as part of the CSRD report and are subject to assurance, which is why thorough documentation of the process and the scoring rationale matters. Exact assurance requirements are evolving under the Omnibus process, so current obligations should be confirmed with a qualified advisor.
Is CSRD scope and the assurance requirement fixed, or could it still change?
It is still evolving. The EU's Omnibus simplification process is actively revising elements of CSRD, including scope and assurance requirements, so companies should treat current guidance as subject to change and verify the latest position with a qualified compliance professional before finalising their approach.
Disclaimer: This article is provided for general informational purposes only and does not constitute legal, regulatory, or certification advice. CSRD and ESRS requirements, including scope and assurance obligations, are subject to ongoing regulatory revision. Before making decisions about your company's materiality assessment or CSRD reporting obligations, consult a qualified compliance consultant or lawyer familiar with your specific circumstances and jurisdiction.
