A common assumption is that action on climate change is expensive. My starting point at the EUROSAI WGEA Spring Session in Madrid was simpler: climate change itself is expensive. Adaptation will cost governments enormous amounts of money. At the same time, renewable energy technologies have become vastly cheaper. Public sector auditors need to consider both dynamics in their work.

Supreme Audit Institutions (SAIs) have largely treated climate change as a subset of environmental auditing, This has effectively placed it outside the mainstream. While core financial and compliance teams focused on balancing books and verifying state expenditures, environmental auditors frequently occupied a separate silo. Financial audit specialists and climate change specialists now need to work together.

Climate change is no longer just an ecological crisis; it is a macroeconomic and fiscal reality that alters state budgets, compromises infrastructure, and threatens long-term national balance sheets. If we are not looking at public administration through a climate lens, we are missing the defining fiscal risk of the twenty-first century.

Most audits – including most financial audits – should now consider climate change. Getting there is a major challenge.

The Challenge of the "Tick-the-Box" Audit

Supreme Audit Institutions (SAIs) routinely run into four obstacles when they seek to mainstream climate issues into their audit programme.

Inconsistent Approaches: Different audit teams applying different criteria and varying levels of depth.

Knowledge Gaps: Auditors are often uncertain what to look for in environmental data.

Time Pressure: Budgets are always tight – and too often climate disclosures are the last the auditee produces.

The “Tick-the-Box" Reflex: A common first step is to answer questions like: Does the Ministry have a written climate strategy? The starting point too often becomes the end point.

Checking whether an administration has set up the structures, committees, or processes it signed up to is a useful way to gain familiarity with a field; checking results is where impact happens.

Mainstreaming climate change

Because climate change affects every facet of public administration, forward-thinking SAIs are shifting from ad-hoc environmental reviews to standardized, mandatory evaluation guides embedded across all audit streams: financial, compliance, and performance.

Faced with the complexity of environmental legal frameworks, the Tribunal de Cuentas in Spain has shifted the assumption so that climate issues are embedded in the planning stage of every audit. They have developed tools to help auditors identify and consider relevant legislation and assess the materiality of associated risks.

Escaping the "Recommendation Trap"

Auditors still face the hurdle of the recommendation trap. Environmental and climate policies are complex, intersecting with economic growth, social equity, and localized geography. Because the structural solutions are rarely straightforward, it is tempting to default to vague, safe, "try harder" recommendations. We have all seen reports that conclude with phrases like: "The Ministry should enhance its coordination efforts," or "The regulatory body should strengthen its monitoring mechanisms."

Recommendations of this kind have a role, but they are not designed to drive policy change or structural reform. But here is the critical insight: as underscored by the UNDP Good Practice Guide on Climate Change Audits, the real impact of a modern audit lies in the depth of its conclusions, not in the granularity of its recommendations. A striking, well-supported finding has more impact and a longer shelf-life than a generic recommendation.

The Path Forward

The way forward involves embracing our responsibility to generate independent, high-impact conclusions. But to back up such conclusions, auditors cannot rely on passive government self-reporting. We must build our capacity for independent analysis.

In our next article, we will step out of the boardroom and onto the digital frontlines, exploring how European SAIs are bypassing government data gaps by turning to a powerful new analytical arsenal: satellites, drones, and deep-learning geospatial analysis.