Double Materiality Assessment for SMEs: a Lightweight Model for VSME Reporting

Double materiality is one of the central concepts in CSRD, and it is also relevant for SMEs preparing a VSME report or responding to a data request from a CSRD-obligated customer. This article explains what the concept means, when an SME needs to carry out an assessment, and how to do so efficiently within a single workshop.

What double materiality means in brief

Double materiality means that a company assesses sustainability matters from two distinct perspectives.

Impact materiality examines how the company’s operations affect the environment and society. For example: how much CO₂ does an industrial facility emit, how does it affect the quality of nearby waterways, and does the company treat its employees and supply chain workforce fairly.

Financial materiality examines the reverse direction: how sustainability matters affect the company’s finances. For example: does emissions trading raise production costs, does climate change affect the availability of raw materials, does a poor reputation put customer relationships at risk.

The term “double materiality” means that both perspectives are taken into account. Earlier sustainability reporting focused primarily on impacts alone. CSRD and ESRS require that financial effects are also assessed systematically.

This represents an important shift in principle. Previous reporting centred on corporate reputation and the effects of business operations on the environment. Double materiality forces companies to consider which sustainability matters could harm the business in the long term, thereby moving the conversation from communications into strategic risk management.

Does an SME need to carry out a double materiality assessment in 2026?

The answer depends on which reporting obligation is in question.

For CSRD-obligated companies, the double materiality assessment is mandatory. It is the core of the ESRS standards suite, and it determines everything else the company must report. Assessments for CSRD-obligated companies are often extensive, take months to complete, and involve stakeholder consultations.

VSME reporting does not require a full double materiality assessment. This is one of the most significant differences between CSRD and VSME, and it is intentional. The standard was designed to remain proportionate for SMEs. VSME Basic does not require a materiality assessment at all. In the Comprehensive module, a lightweight assessment is recommended to identify material topics and justify why the selected sections of the report were chosen.

In practice, a lightweight assessment is sufficient for most SMEs. It can be carried out in a half-day management team workshop. This is adequate for both VSME Comprehensive and most situations where a large CSRD-obligated customer asks a supplier for a brief materiality assessment.

A practical note: if a customer has sent an ESG questionnaire that asks about a “materiality assessment”, a short description (1–2 pages) explaining which topics the company considers material and on what basis almost always suffices. The customer is not expecting a CSRD-level analysis, just documented reasoning for the selected topics.

Impact materiality for SMEs: practical questions

When assessing impact materiality, SMEs should work through the following questions.

Environment: What are our direct emissions (Scope 1 and 2)? Where do our raw materials come from and what emissions are associated with their production? Do we generate waste that ends up in landfill or incineration? Do we use water in processes that could affect the local environment? Do we have products or services with a clear environmental impact during the use phase?

Social impacts: How do we treat our own employees: wages, occupational safety, non-discrimination? Are there regions or suppliers in our supply chain that carry human rights risks? Does our operation affect the local community, for example noise, traffic, or employment?

Governance: Are business principles documented? Do we address bribery risk systematically? Do we have a whistleblower channel?

This list is indicative rather than exhaustive. The precise scope is always defined on a company-by-company basis.

Financial materiality for SMEs: practical questions

When assessing financial materiality, the questions are reversed: which sustainability matters could affect our finances.

Regulatory risks: Are we in a sector where new environmental, energy, or occupational safety regulations are forthcoming? Does CBAM or emissions trading affect raw material costs? Are any of our products or services likely to face usage restrictions?

Market risks: Could large customers switch supplier if we fail to engage in sustainability work? Is sustainability already a selection criterion in tenders? Could our reputation affect access to investment or talent?

Physical risks: Could climate change affect the availability of raw materials, production disruptions, or insurance premiums? Are there regions in the supply chain where the risk of heatwaves, flooding, or drought has increased?

Opportunities: Could sustainability work open new markets, for example low-carbon construction products, recycled materials, or green financing from banks?

For SMEs, assessing financial materiality does not require quantitative modelling. It is sufficient to identify the topics and assess them in broad terms (low / medium / high impact, short / long time horizon).

A lightweight 5-step model for SMEs

NGS recommends the following five-step model for SMEs. The entire process typically takes one half-day management team workshop and a couple of hours of follow-up work.

1. List the company’s activities. Walk through the business areas, main products or services, and the most significant raw materials and supplier groups. This provides the foundation for everything else.

2. Identify potential topics. Use the list of themes from the ESRS standards (climate, water, circular economy, employees, local communities, consumers, business conduct) as a checklist. For each topic, note briefly whether it applies to your company and how.

3. Assess severity and likelihood. For each topic, ask: how significant is this impact or risk (scale 1–3) and how likely is it to materialise now or within the next five years? A simple matrix is sufficient.

4. Document material topics and justifications. Select as material those topics where severity or likelihood is high. Write down the justifications for why others have been scoped out. This is the most important document. It needs to withstand scrutiny from a customer or verifier.

5. Update annually. A double materiality assessment is not a one-off exercise. Update it annually as part of the reporting cycle, or more frequently if the business changes materially.

Stakeholder consultations (customers, employees, local community) are mandatory for CSRD-obligated companies, but at VSME scale an SME can limit consultations to a few key customers and an internal employee survey.

A practical example of a lightweight consultation: ask 3–5 large customers to respond to a brief email survey (“which sustainability topics are most important to you when selecting suppliers?”), run an internal employee survey with 10–15 questions, and have a conversation with one representative from a nearby impact area (for example, neighbours if the operation is noisy or located near a residential area). This is sufficient in most SME situations.

The most common mistakes in SME assessments

The same mistakes recur in NGS’s VSME projects when SMEs carry out a materiality assessment for the first time.

Overly ambitious assessment. The SME attempts a CSRD-level analysis that takes months. At VSME scale, a lightweight model is sufficient, and a one-day session produces a usable result.

Forgetting stakeholder consultations. Even if an SME cannot conduct extensive consultations, the results of customer feedback or an employee survey are worth recording in the assessment. This significantly increases credibility.

Lack of documentation. The assessment is done mentally or on sticky notes, but the final document is missing. Without a document, the assessment will not withstand scrutiny from a customer or verifier.

Impact materiality only. The SME assesses only environmental and social impacts but omits financial materiality. The name “double materiality” comes from the fact that both sides must be included.

No update. The assessment is carried out once and forgotten. Business changes, regulation changes, the customer base changes. The assessment must be updated annually.

Practical example: a manufacturing SME with 80 employees

A concrete example illustrates what a lightweight assessment looks like in practice. Consider a hypothetical manufacturing SME producing metal components for industrial customers. Eighty employees, revenue of €18 million, one production facility in southern Finland.

Impact materiality. The company uses electricity for CNC machines (Scope 2, high impact, high likelihood), produces metal cutting waste that is recycled (circular economy, medium, high), and purchases steel from Europe and Asia as raw materials (Scope 3 Cat 1, high, high). Occupational safety is material (low history of serious accidents, but high potential), human rights within the company’s own operations are not material, but the Asian share of the supply chain raises the risk to medium.

Financial materiality. The indirect impact of emissions trading on the steel sector is raising raw material costs (medium, high). The largest customer will require a VSME report going forward and failure to respond could mean loss of supplier status (high, high). Energy price volatility affects profitability (medium, high). Access to talent may weaken if the company fails to communicate about sustainability to younger generations (low, medium).

Material topics: climate (Scope 1, 2, and supply chain Scope 3), circular economy (metal waste), employees (occupational safety), value chain human rights, governance.

The remaining topics (water, biodiversity, local community) are scoped out with a brief justification. The entire assessment fits on two A4 pages and takes one half-day management team workshop.

Frequently asked questions

Is the double materiality assessment mandatory under VSME?

VSME Basic does not require it. In the Comprehensive module, a lightweight assessment is recommended, but a full CSRD-level analysis is not required.

How long does a lightweight double materiality assessment take for an SME?

Based on NGS’s experience, a half-day management team workshop and a couple of hours of follow-up work is sufficient for most SMEs. The total duration is generally 1–2 weeks when preparation and documentation are included.

What does IRO mean?

IRO stands for Impacts, Risks and Opportunities. The ESRS standard uses the term to describe the outcomes of double materiality: the company identifies its material impacts, risks, and opportunities for each topic.

Do stakeholders need to be interviewed?

For CSRD-obligated companies, yes, systematically. At VSME scale, an SME can limit consultations to a few key customers and an internal employee survey. Documentation is more important than breadth.

Does the assessment need to be updated every year?

Yes. Even though VSME is voluntary, the credibility of the report requires the materiality assessment to be current. A lightweight annual update and a thorough review every 3–5 years is a sufficient cadence.

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