Scope 3 blindness: why companies underestimate supply chain

Companies are flying blind on Scope 3. New data from EcoVadis suggests organisations underestimate their supply chain emissions by as much as 2.7 times – a gap so large it renders most carbon reporting meaningless.

Scope 3 (value chain emissions: upstream suppliers and downstream use) typically accounts for 70–90% of a company's total carbon footprint. Yet measurement remains crude. Suppliers often lack the infrastructure or incentive to report accurately. Buyers rely on proxies: industry averages, spend-based calculations, or supplier self-assessment questionnaires that nobody treats with rigour.

When actual measured data surfaces – through energy audits, invoices, direct metering – the real figures dwarf the estimates. That 2.7x multiplier is not a rounding error. It's the difference between hitting a net-zero target and missing it by a decade.

This matters beyond compliance. The financial system now prices climate risk into cost of capital. Pension funds, asset managers, and debt providers are scrutinising Scope 3. A company that has underestimated its supply chain emissions by three-fold hasn't just misreported: it's exposed to restatement risk, reputational damage, and stranded finance.

The fix isn't fancy. It requires three things: contractual obligation on suppliers to measure and share (not estimate); third-party verification of supplier data; and acceptance that transparency will reveal problems before targets are met.

How many companies have the stomach to discover their Scope 3 is actually twice as large as they reported last year?

Scope 3 im Blindflug: Warum Unternehmen ihre Lieferkettenemissionen um bis zu 2,7x unterschätzen

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