Why supply chain pressure is now the main driver of carbon accounting?

 

There is a moment most sustainability managers recognise immediately when they hear it described.

 

A client emails. Or a procurement team sends a questionnaire. Or a tender requirement arrives with a section on Scope 3 emissions and supply chain carbon data. And the answer, the actual, structured, verifiable answer, doesn't exist yet.

 

Not because the company hasn't thought about sustainability. Many have. But thinking about it and having the data are two different things.

 

This is the moment that is driving carbon accounting adoption in 2026. Not regulation. Not voluntary commitments. A specific request, from a specific client, for data that isn't ready.

 

The shift that Omnibus I confirmed

 

When the EU's Omnibus I simplification package passed in December 2025, it reduced the number of companies legally required to report under CSRD by approximately 85%. For many businesses, it looked like a reprieve.

 

What it actually confirmed was a shift that had already been underway. Among European SMEs, 60% cite customer and market demand as their primary reason for engaging with sustainability reporting. Only 23% point to regulatory obligation.

 

The compliance deadline was always the wrong frame for most businesses. The real trigger was, and remains, the supply chain.

 

The numbers behind the pressure

 

Only 19% of companies currently have full visibility into their supply chain emissions. Which means the vast majority of large corporates pushing sustainability questionnaires downstream are receiving responses that are incomplete, inconsistent or impossible to verify.

 

The gap is significant. And it is expensive for both sides. The estimated cost of manual sustainability data collection across European businesses runs into billions of euros annually. Much of that cost is in the scramble, pulling together data that was never structured in the first place, from systems that were never designed to produce it, under deadline pressure that leaves no time to do it properly.

The result is data that satisfies the immediate request but doesn't hold up to follow-up questions. Or to an auditor. Or to the next, more detailed version of the same questionnaire that arrives twelve months later.

 

What buyers are actually asking for

 

The nature of the request has changed. A few years ago, a supplier sustainability questionnaire might ask whether a company had a sustainability policy. Today, it asks for Scope 1, 2 and 3 emissions figures, broken down by category, with the methodology documented and the data quality indicated.

 

That is not a checkbox. It is a structured data requirement. And the difference between a company that can answer it in three days and one that needs three months is not ambition or intention. It is infrastructure.

 

The practical implication

 

Carbon accounting used to be something companies did when they decided they were ready. Increasingly, it is something they do because someone asked and the cost of not having the answer became higher than the cost of building the capability.

 

The companies that are ahead of this curve share a common characteristic. They didn't wait for the request to arrive before building the system to answer it. They built the system first, comprised of structured data collection, clear methodology, traceable outputs, and found that answering the next request, and the one after that, became progressively easier.

 

That is the practical case for carbon accounting in 2026. Not compliance. Not reputation. The ability to answer the question before it becomes a problem.