From Spend-Based to Supplier-Specific: A Practical Data Improvement Path
Moving from spend-based to supplier-specific emissions data means targeting only the suppliers identified in a hotspot analysis, with a proportional, structured data request combined with support, not sending the same demanding questionnaire to every supplier regardless of their actual contribution to the footprint. A spend-based figure is a reasonable first estimate for orientation, but it becomes actively misleading if used to demonstrate genuine reduction, since it moves with purchase price rather than with actual emissions.
Why spend-based data can't show real progress
A spend-based estimate calculates emissions from money spent, using an industry-average emission factor per euro or dollar. If you negotiate a lower price with the same supplier doing the same work, the spend-based emissions figure drops, even though nothing about actual emissions changed at all.
How to prioritise which suppliers to move to supplier-specific data first
The hotspot analysis identifies which suppliers represent the largest share of estimated emissions within your material categories. Moving those suppliers to real, supplier-specific data first delivers the most improvement in overall data accuracy per unit of effort.
What a proportional data request actually looks like
Scaled to the supplier's size and capability, a large, sophisticated supplier can reasonably be asked for detailed, verified emissions data; a small supplier without dedicated sustainability staff needs a much lighter, more supported request to actually produce something usable.
Make Your Scope 3 Number Reflect Real Reductions
We find the Scope 3 categories that actually matter for your business, move you from spend-based estimates to supplier-specific data, and embed the result in procurement decisions.