Impact investing has spent a decade as a marketing category. It is becoming a discipline of evidence instead.
That shift is visible in the latest good-and-poor-practice material from the Financial Conduct Authority (FCA), the UK regulator responsible for supervising financial firms and markets. The guidance sits within the Sustainability Disclosure Requirements (SDR) regime, a set of rules designed to help consumers navigate sustainable investment products, improve trust in how they are described, and reduce greenwashing — the practice of overstating or misrepresenting a product’s environmental or social credentials.
The direction of travel is unambiguous. A fund that wants to claim it delivers impact must now show its working.
A label with conditions attached
The SDR regime offers four voluntary labels that firms can attach to a fund: Sustainability Focus, Sustainability Improvers, Sustainability Impact and Sustainability Mixed Goals. Each carries its own qualifying criteria, but the Impact label is the most demanding, and the one the FCA’s new material focuses on most closely.
To use it, a fund must set a clear objective with pre-defined, measurable positive environmental and/or social outcomes. Vague ambition is not enough. The objective has to be specific enough that a third party could later check whether it was met.
Crucially, the FCA has also closed a long-standing loophole around language. The word “impact” can no longer appear in a product name unless that product actually carries one of the SDR labels. A fund cannot borrow the credibility of the word while sidestepping the accountability that now comes with it.
The three-part test: outcome, cause, contribution
Reading through the FCA’s good-practice examples, a pattern emerges. An Impact label claim needs to stand up against three separate tests.
The first is outcome: what, precisely, is the fund trying to change, and how will that change be measured? The second is causation — what the FCA describes as a theory of change. This is the explicit account of what change is expected, how it is expected to happen, and why the mechanism is credible rather than aspirational.
The third test is contribution. A fund must show how its own capital or engagement activity — voting, dialogue with company management, or the terms attached to financing — actually contributed to the outcome, rather than simply co-existing alongside it.
That third test carries an important piece of intellectual honesty. The FCA’s good-practice guidance is explicit that managers should not claim sole responsibility for outcomes achieved through engagement. A company might improve its emissions profile, its labour practices or its governance for many reasons, of which an investor’s engagement is only ever one input among several. The regulator wants that acknowledged, not glossed over.
Why the anti-greenwashing rule raises the stakes
None of this exists in isolation. Every FCA-authorised firm — not just those using SDR labels — must already comply with the anti-greenwashing rule, finalised guidance that requires sustainability-related claims about products and services to be clear, fair and not misleading, and capable of being substantiated. That rule applies whether or not a fund carries a label at all.
The combined effect is a narrowing of the space in which loosely worded impact claims can survive. A manager can still describe a strategy as sustainability-focused, or improving, without meeting the Impact label’s full evidentiary bar. What a manager can no longer do is use the word “impact” as a costless adjective.
For asset owners and advisers assessing funds, the practical takeaway is a checklist rather than a slogan. Ask for the pre-defined metric. Ask for the theory of change in writing. Ask how the manager distinguishes its own contribution from the outcome itself. If a fund’s marketing cannot answer those three questions with specifics, the label — and the claim behind it — is not doing what it says.
Impact investing was always sold as a values proposition. Under the FCA’s current approach, it is being rebuilt as something closer to a testable hypothesis — one that has to survive scrutiny before it can be marketed at all.
