Why Scope 3 matters
For most companies, Scope 3 emissions represent 70-90% of their total carbon footprint. These are the indirect emissions that occur across your value chain , from purchased goods and services to business travel and end-of-life treatment of sold products. Under frameworks like the CSRD and GHG Protocol, reporting these emissions is increasingly mandatory rather than voluntary.
Ignoring Scope 3 means ignoring the vast majority of your environmental impact. Companies that focus only on Scope 1 (direct emissions) and Scope 2 (purchased energy) are addressing just a fraction of the picture. Investors, regulators, and customers now expect full value chain transparency.
The 15 categories of Scope 3
The GHG Protocol defines 15 categories of Scope 3 emissions. Not all will be relevant to your business, but understanding the full picture is essential for accurate reporting.
Upstream categories include purchased goods and services, capital goods, fuel and energy-related activities, upstream transportation, waste generated in operations, business travel, employee commuting, and upstream leased assets. Downstream categories cover downstream transportation, processing of sold products, use of sold products, end-of-life treatment, downstream leased assets, franchises, and investments.
For most manufacturing and retail companies, Category 1 (purchased goods and services) alone can account for over 50% of total emissions. Service-based companies often find business travel and employee commuting among their most significant categories.
Getting started
Start with your most material categories , usually purchased goods and services (Category 1) and transportation (Categories 4 and 9). Work with your suppliers to collect primary data where possible. Where primary data is unavailable, spend-based estimates using emission factor databases provide a reasonable starting point.
A phased approach works best: begin with spend-based estimates to establish a baseline, then progressively improve data quality by engaging key suppliers for activity-based data. Automated data collection tools can significantly reduce the burden of gathering supplier information and maintaining consistent measurement across reporting periods.
Reducing Scope 3 emissions
Once you have a clear picture of your Scope 3 footprint, reduction strategies can focus on the highest-impact areas. Common approaches include switching to lower-carbon suppliers, optimizing logistics routes, redesigning products for lower lifecycle emissions, and engaging employees on commuting alternatives. Setting science-based targets (SBTi) provides a structured framework for setting and tracking reduction goals.
Need help with Scope 3? Request a demo to see how Dcycle automates supplier data collection.
