Sustainability report: writing one that survives being checked

A sustainability report sets out what an organisation does about its environmental and social impact, with the figures behind it. For larger companies it is increasingly a legal obligation; for smaller ones it is usually produced because a customer, an investor or a tender asked for it — which is a demanding audience, since they are looking for something specific rather than reading for pleasure.

That audience explains what makes a report succeed or fail. Nobody is impressed by photography and adjectives. What gets checked is whether the numbers have a stated method, whether last year's targets are mentioned, and whether anything unflattering appears anywhere in the document.

What a credible report contains

• What you measured and how, per figure. Energy use from meter readings is a different claim from energy use estimated from floor area, and saying which is the difference between a number and an assertion.
• The boundary: which entities, sites and activities are included, and which are not. Reports that omit this are assumed to have chosen the flattering scope.
• Comparison against a previous period, or a statement that this is the first year and therefore the baseline.
• Targets, with dates, and honest reporting against the previous set — including the ones missed.
• What got worse, and why. A report where every line improved is read as selective rather than excellent.
• The standard or framework used, if any, covered in sustainability reporting standards.
• Who is responsible and who approved it.

Include at least one thing that went badly. It is the single strongest credibility signal available, and its absence is the first thing an experienced reader notices — every organisation has a year where something regressed, so a uniformly positive report says more about the reporting than about the performance.

Scale it to the business

A small company does not need a sixty-page document. Four honest pages — what we measure, what the numbers are, what we are doing, what we have not solved — outperform a long report with generic language, and they cost a fraction of the effort. The temptation to imitate a large corporate report is where small businesses waste the budget: the length is a consequence of regulatory requirements you do not have, not a signal of seriousness.

The greenwashing risk is now legal

Vague environmental claims have moved from a reputational question to a regulatory one in several jurisdictions, with rules constraining unsubstantiated terms like carbon neutral, eco-friendly and climate positive, and advertising regulators acting on specific claims. The practical implication for a report is simple: every claim needs a basis you could show somebody, offsetting should be described precisely rather than folded into a headline number, and comparative claims need the comparison stated. What applies to you depends on where you operate and is worth checking properly.

Where it lives

Ettex Docs holds the report and its drafts with version history, which matters when a figure is questioned a year later; the underlying measurements belong in Ettex Sheets and the evidence and owners in Ettex Records, alongside the disclosure question in esg disclosure.

Being direct: this is not sustainability reporting software. There is no emissions calculation engine, no supplier data collection, no framework mapping and no assurance workflow. Those exist as a product category for organisations under formal obligations. What we hold is the document, the numbers behind it and the record of where they came from.

Two pieces of work sit underneath the report and take most of the effort. A double materiality assessment decides which topics have to appear in it, and scope 3 emissions are usually the largest number in it and the one you cannot measure without asking suppliers.