Double Materiality — A Straightforward Explainer

This short lesson cuts through the jargon to explain double materiality in simple terms — helping you understand both the outside-in and inside-out perspectives at the heart of sustainability reporting.

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Lesson Overview

In this short lesson, we simplify the concept of double materiality — cutting through jargon to focus on what matters. We explore:

  • 📌 The external perspective (outside-in) — how sustainability issues impact a company’s financial position and performance
  • 📌 The internal perspective (inside-out) — how a company’s activities impact the environment, society, and broader stakeholders
  • 📌 Why regulatory focus often leans toward the external view — and why internal impacts shouldn’t be overlooked
  • 📌 The importance of defining materiality thoughtfully — beyond short-term financial lenses

Double materiality isn’t complicated — but applying it properly requires seeing both sides clearly.

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Short lessons. Clear thinking. Real impact.

A small shift in thinking can make a big difference.

— Vincent McCarthy, CFA
Founder, Responsible Investment Institute®