Interactive Demo
Scope 3: What Your Supply Chain Carbon Data Really Looks Like
When contractors don’t measure their emissions, you’re left estimating. As their revenue with you grows, so does your reported carbon — even if they’re actively decarbonising.
Spend-Based Estimate
830 t
CO₂e from sector averages
The Blind Spot
+479 t
overestimated vs reality
136% higher than actual
Supplier-Specific Data
351 t
CO₂e from verified reports
⚠️ Without Contractor Data
Using DEFRA spend-based factors. Scope 3 grows with spend regardless of actual performance.
Bradshaw M&E
Mechanical & Electrical
£1.0m
270 t
Greenline Services
Environmental Services
£450k
99 t
Hartfield Building Co
General Construction
£800k
280 t
Cooper & Lane HVAC
Heating & Ventilation
£350k
109 t
Eastwood Electrical
Electrical Installations
£280k
73 t
Total Estimated830 tCO₂e
✅ With Sustainable Contractor
Each contractor completes a verified carbon report. Allocated by your share of their work.
Bradshaw M&E
Mechanical & Electrical
390t total
125 t
✓ Baseline carbon report completed
Greenline Services
Environmental Services
140t total
39 t
✓ First emissions measurement
Hartfield Building Co
General Construction
520t total
114 t
✓ Carbon baseline established
Cooper & Lane HVAC
Heating & Ventilation
165t total
41 t
✓ Refrigerant leak audit completed
Eastwood Electrical
Electrical Installations
105t total
32 t
✓ Energy audit completed
Total Verified351 tCO₂e
The Bottom Line
By Year 4, spend-based estimates show supply chain emissions increasing by 105% — even though every contractor is actively decarbonising. Actual supplier data shows a 25% reduction. One tells auditors you're going backwards. The other proves your strategy is working.
Ready to see your real Scope 3?
Get your contractors reporting actual emissions.
Illustrative example using fictional companies. Spend-based factors representative of DEFRA SIC code ranges.
