Double Materiality Assessment for SMEs: What CSRD Requires

What Is Double Materiality?

Double materiality is the concept at the heart of the EU Corporate Sustainability Reporting Directive (CSRD). It requires companies to assess sustainability topics from two perspectives simultaneously:

1. Financial materiality (outside-in): How do sustainability issues — climate change, water scarcity, supply chain disruption — create financial risks and opportunities for the business?
2. Impact materiality (inside-out): What actual and potential impacts does the business have on people and the environment across its value chain?

A topic is material if it is significant from either direction. This is broader than traditional financial materiality (which only asks whether something affects the company's finances).

Why Does Double Materiality Affect SME Suppliers?

CSRD directly applies to large EU companies (initially 500+ employees, then 250+). Those companies are required to report on their Scope 3 emissions — which means surveying their suppliers. Their double materiality assessment determines which sustainability topics they report on, and climate change (GHG emissions) is material from both directions for almost every industry sector.

When your large client runs their double materiality assessment and flags GHG emissions as a material topic, they will request emissions data from you — regardless of your size.

The Two-Step Double Materiality Process

Step 1 — Identify the universe of sustainability topics The European Sustainability Reporting Standards (ESRS) provide a list of topics: climate change, pollution, water, biodiversity, workers in the value chain, business conduct, and others. Start with the full ESRS list.

Step 2 — Score each topic for impact and financial materiality For each topic, assess:

Topics scoring above a threshold on either dimension are material and must be disclosed.

What SMEs Need to Prepare

SMEs are not directly subject to CSRD unless they exceed 250 employees and €40m revenue (from 2026 onwards). However, you will receive requests from large clients who are in scope. Here is the minimum preparation:

1. GHG emissions data (climate change is always material) Every double materiality assessment across every sector flags climate change as financially material (physical and transition risk) and impact material (your emissions contribute to climate harm). Have verified Scope 1, 2, and key Scope 3 data ready.

2. A basic impact statement Document the main ways your business affects the environment and workers: energy consumption, waste generation, packaging, employment terms. This does not require CSRD-level reporting — a one-page summary suffices for SME supplier questionnaires.

3. A reduction target or commitment Even a non-validated commitment to reduce emissions 20% by 2030 against a 2024 base year satisfies the most common buyer request. Science Based Targets (SBTi) validation adds credibility but is not required at SME level.

Double Materiality vs Single Materiality: The Key Difference

Under the old Non-Financial Reporting Directive (NFRD), large companies applied only financial materiality — they only reported what affected their own bottom line. Under CSRD's double materiality standard, they must also report their impacts on the world.

This shift has a direct practical consequence: CSRD reporters will assess and disclose topics that were previously invisible in financial reporting, including the emissions embedded in their supplier base. This is the mechanism by which CSRD pulls SMEs into corporate sustainability reporting.

Practical Steps for an SME Double Materiality Screening

If you want to run a basic double materiality screening for your own planning or for a buyer who requests it:

1. List your significant business activities (manufacturing, distribution, services)
2. Map your material inputs and outputs (raw materials, energy, waste, products)
3. Score climate change as high impact + high financial materiality (true for nearly all businesses)
4. Score any sector-specific topics (e.g., water use for food processors, chemicals for manufacturers)
5. Document the process — even a simple spreadsheet with topic, score, and reasoning satisfies buyer requests

Free ESRS double materiality assessment templates are available from Accountability Europe and the EFRAG website. For most SMEs, a half-day workshop with two or three senior managers produces a defensible result.