Reporting Mid-Year Deviations From Pre-Crisis Climate Assumptions Under CSRD

The 2026 energy and geopolitical environment is forcing European companies to revisit climate assumptions that were considered reasonable only months earlier. Higher gas prices, disrupted energy routes, weaker industrial demand and changing decarbonization economics can materially affect the assumptions embedded in climate transition plans.

For companies reporting under the Corporate Sustainability Reporting Directive (CSRD), this creates an important question: when market conditions change significantly during the reporting period, how should companies explain the deviation between their original climate assumptions and the position they actually face at mid-year?

The answer is increasingly about transparency, consistency and explaining the financial consequences of changed assumptions—not simply updating a carbon target.

CSRD Turns Climate Assumptions Into Corporate Reporting Information

CSRD reporting is built around the concept of double materiality. Companies must consider both how sustainability matters affect the business and how the company's activities affect people and the environment.

Climate-related information under the European Sustainability Reporting Standards (ESRS), particularly ESRS E1, can therefore extend beyond reporting historical emissions.

Companies may need to explain their:

• Climate transition plans

• Decarbonization targets

• Energy consumption

• Scope 1, 2 and 3 emissions

• Climate-related risks and opportunities

• Financial effects of climate-related risks

• Actions and resources allocated to transition

• Compatibility of their strategy with climate objectives

This makes a major mid-year change in energy or climate assumptions potentially relevant to management reporting and external disclosure.

Why the 2026 Environment Is Different

Many corporate transition plans were built around assumptions established before the latest energy and geopolitical disruptions.

Those assumptions may have included:

• Stable natural-gas prices

• Predictable LNG availability

• Gradual carbon-price increases

• Stable electricity costs

• Reliable access to imported raw materials

• Planned availability of renewable energy

• Expected timing of hydrogen projects

• Expected availability of carbon-capture infrastructure

The 2026 crisis environment has challenged several of these assumptions simultaneously.

European gas prices have experienced significant volatility, while disruptions to Middle Eastern energy flows have demonstrated how quickly geopolitical events can alter energy costs and availability.

For energy-intensive industries, this can change the economics of decarbonization projects almost immediately.

A Transition Plan Is Not a Fixed Forecast

One of the most important principles for companies is that a transition plan should not be treated as a static document.

If a company originally assumed that green hydrogen would become cost-competitive with natural-gas-based hydrogen by a particular date, but electricity prices, gas prices or project costs subsequently change, management may need to reassess that assumption.

The company should distinguish between:

Original assumption → Actual development → Updated assumption → Financial and climate impact

This is much more useful to investors than simply changing a target without explaining why.

Example: A Chemical Producer's Hydrogen Assumption

Consider a European chemical producer that built its 2030 transition plan around replacing natural-gas-derived hydrogen with green hydrogen.

The original model assumed:

• TTF gas: €30/MWh

• Renewable electricity: €50/MWh

• Green hydrogen cost: €4/kg

• Green hydrogen project operational by 2028

After a major energy disruption, the company's actual environment changes:

• Gas prices rise sharply

• Electricity prices become more volatile

• Electrolyser project costs increase

• Project financing becomes more expensive

• The hydrogen supplier delays FID

The company now has a material deviation from its original transition assumptions.

The appropriate reporting question is not simply:

"Did the company miss its climate target?"

It is:

"How did the changed assumptions affect the company's transition pathway, financial position and expected emissions trajectory?"

Mid-Year Deviations Can Affect Financial Planning

Climate assumptions increasingly overlap with conventional financial assumptions.

For example, a change in gas prices can affect:

Energy costs → operating margin → cash flow → capital expenditure → project economics → asset valuation

At the same time:

Energy prices → relative cost of green technology → decarbonization timing → expected emissions

This creates a direct connection between climate reporting and financial planning.

For industrial companies, a delayed hydrogen or CCS project could affect both the emissions pathway and the expected capital expenditure profile.

Scenario Analysis Becomes More Important

Companies facing high uncertainty should increasingly use scenarios rather than rely on one forecast.

For example:

The purpose is not to predict the exact future.

It is to demonstrate that management has identified the assumptions most capable of changing the transition strategy.

Scope 3 Assumptions May Also Need Revision

For chemical companies, the impact can extend beyond direct emissions.

A procurement team may have assumed that suppliers would shift toward lower-carbon feedstocks by 2030. If those suppliers delay projects because of weak economics, the company's expected Scope 3 trajectory may also change.

For example:

Supplier decarbonization delay → higher-carbon feedstock → higher purchased-goods emissions → revised Scope 3 pathway

This is particularly relevant when a company depends heavily on petrochemicals, polymers, fertilizers or other energy-intensive inputs.

Companies should therefore distinguish between:

• Committed supplier reductions

• Contracted reductions

• Announced projects

• Aspirational reductions

A supplier's announced green-hydrogen or carbon-capture project should not automatically be treated as a guaranteed future emissions reduction.

The Importance of Evidence

A stronger mid-year climate disclosure should support changed assumptions with evidence.

Useful evidence can include:

• Updated energy-price forecasts

• Supplier notifications

• Project FID decisions

• Revised construction schedules

• Power-purchase agreements

• Government policy changes

• Carbon-price scenarios

• Revised engineering estimates

• Updated emissions measurements

This creates an audit trail between the original assumption and the revised position.

For companies preparing CSRD information, this is especially important because sustainability disclosures are subject to assurance requirements.

Companies Should Avoid "Silent Rebaselining"

One of the biggest reporting risks is changing assumptions without clearly explaining the change.

Suppose a company initially expected emissions to decline by 40% by 2030 but later revises the pathway to 30%.

Simply publishing the new target creates an obvious question:

Why did the target change?

A more credible approach is to explain:

1. What the original assumption was.

2. What changed.

3. When the change became apparent.

4. How it affects the company's strategy.

5. Whether the financial implications changed.

6. What management is doing in response.

7. Whether the target remains achievable.

This protects the credibility of the transition plan.

Climate Reporting Is Becoming More Dynamic

The traditional annual reporting cycle can struggle to capture rapidly changing energy and geopolitical conditions.

However, companies do not necessarily need to publish a complete new sustainability report every time a market variable changes.

Instead, management can establish internal climate-assumption monitoring.

A useful framework is:

Monitor → Trigger → Assess → Document → Disclose

For example:

Monitor: TTF gas price and renewable-power prices.

Trigger: Gas price remains above a predetermined threshold for several months.

Assess: Recalculate hydrogen and electrification economics.

Document: Record the impact on the transition plan.

Disclose: Explain the material deviation in the next applicable reporting.

What This Means for Chemical Companies

Chemical producers are particularly exposed because their transition plans often depend on several interconnected assumptions.

A typical pathway might look like:

Natural gas → hydrogen → ammonia/chemicals → carbon capture → low-carbon products

If gas prices change, hydrogen economics change.

If hydrogen economics change, ammonia production economics change.

If ammonia economics change, fertilizer or chemical prices change.

If carbon-capture costs increase, the economics of blue hydrogen change again.

This means a single market shock can propagate through an entire decarbonization model.

Procurement Teams Also Have a Role

Climate reporting should not be treated solely as a sustainability department responsibility.

Procurement teams increasingly hold information that directly affects climate assumptions, including:

• Supplier emissions data

• Feedstock origin

• Renewable-energy contracts

• Product carbon intensity

• Supplier decarbonization projects

• Contractual commitments

• Expected supply changes

A procurement system that records only price, quantity and delivery date may therefore be insufficient for future climate reporting.

Companies may need procurement data that also captures carbon intensity and the credibility of supplier decarbonization commitments.

The New Reporting Question

The key change is that climate reporting is moving from:

"What is our target?"

toward:

"What assumptions support our target, and are those assumptions still valid?"

This is particularly important during periods of major market disruption.

A credible CSRD disclosure should allow investors and other stakeholders to understand whether a company's climate strategy remains financially and operationally realistic under current conditions.

Outlook

The 2026 energy and geopolitical environment demonstrates why climate transition plans cannot be treated as fixed five- or ten-year forecasts.

Companies should expect some assumptions to change.

What matters is how transparently those changes are identified, quantified and incorporated into decision-making.

For European industrial companies, the strongest approach is likely to combine CSRD reporting with a continuous internal process for monitoring energy prices, carbon costs, technology economics, supplier commitments and project execution.

The objective is not to avoid changing a climate plan.

It is to ensure that when the plan changes, stakeholders can clearly see what changed, why it changed and what the company is doing about it.