The words “impact” and “transition” carry considerable weight in sustainable finance. They suggest that capital is doing something purposeful: supporting environmental or social improvements, or helping move economic activity towards a lower-carbon future.
But those descriptions leave an important question unanswered: what, precisely, should an investor expect?
On 12 October 2026, the European Securities and Markets Authority published two thematic notes addressing that gap. One examines positive impact claims made through funds and bonds. The other considers climate-transition claims across funds, bonds and benchmarks. Both focus on making sustainability communications clear, fair and not misleading.
For businesses preparing investment presentations, product webpages and sustainability marketing, the timing provides a useful reason to review not only what they disclose, but what their language implies.
Guidance, not a new reporting framework
The distinction matters. ESMA’s notes do not introduce new regulatory requirements, prescribe a particular sustainability ambition or determine the outcome of the ongoing Sustainable Finance Disclosure Regulation review.
Instead, they use observed market practices and practical examples to explain existing expectations for sustainability-related communications. Their focus is non-regulatory communication, rather than creating another mandatory disclosure template.
The practical implication is that completing formal disclosures does not remove the need to examine the claims made around them.
Impact: explain the difference you expect to make
ESMA recognises that market participants understand positive environmental and social impact differently and attach different levels of ambition to the term.
Its message is straightforward: explain what difference the investment is expected to make, how that difference will be generated and how results will be measured.
Consider a hypothetical fund investing in companies that manufacture energy-efficient equipment. Describing its exposure to those businesses is one claim. Saying the fund itself has delivered a quantified reduction in emissions is another.
The second statement needs an explanation of the relationship between the investment, the underlying activity and the claimed result. Without that connection, readers may interpret an investment theme as evidence of an achieved outcome.
ESMA’s impact note emphasises that claims should accurately represent the sustainability profile of the entity or financial product, avoid exaggeration and be supported by credible reasoning, facts and processes.
Transition: separate the destination from delivery
Climate-transition claims create a different communication challenge because they are inherently forward-looking.
An ambition may depend on future investment decisions, technological development, policy changes or infrastructure that is not yet available. ESMA therefore highlights the importance of explaining the transition ambition, the implementation approach and how progress will be assessed and communicated—including relevant assumptions, limitations and dependencies.
For example, a hypothetical industrial transition investment might depend on access to low-carbon electricity or new transport infrastructure. A credible description should make that dependency visible rather than present the desired outcome as assured.
The purpose is not to eliminate uncertainty. It is to prevent uncertainty from disappearing from the marketing.
A practical review before the next campaign
A useful internal review, informed by ESMA’s guidance, would ask five questions:
Meaning: What exactly does “impact” or “transition” mean in this communication?
Mechanism: How is the investment or strategy expected to contribute?
Evidence: Which facts, calculations and processes support the statement?
Dependencies: What must happen outside the organisation’s control?
Progress: Are the results achieved clearly distinguished from future objectives?
This is an editorial checklist derived from the guidance, not a new ESMA reporting requirement.
Why the distinction matters beyond financial products
The notes address financial-market communications; they should not be presented as rules applying identically to every corporate sustainability statement.
Nevertheless, companies seeking sustainable finance can use the same questions to strengthen their supporting materials. A lender or investor evaluating a transition proposition needs more than an attractive destination: it needs an intelligible account of delivery, evidence and uncertainty.
The central lesson from ESMA’s October intervention is not that businesses should stop communicating ambition. It is that ambition, implementation and achievement are different categories—and credible sustainability communications must keep them separate.
Sources
ESMA — “ESMA promotes clarity in claims on impact and transition”, 12 October 2026:
https://www.esma.europa.eu/press-news/esma-news/esma-promotes-clarity-claims-impact-and-transitionESMA — Thematic note on impact claims, October 2026:
https://www.esma.europa.eu/sites/default/files/2026-10/ESMA36-429234738-3593_Thematic_note_on_impact.pdfESMA — Official document library, including the impact and transition notes dated 12 October 2026:
https://www.esma.europa.eu/databases-library/esma-library