Supplier Carbon Data
Practical guidance for collecting, assessing and responding to supplier emissions data requests across the value chain.
If you are responding to a customer request
Start here
Decode what the customer is asking for before collecting data.
Questionnaire workflow
Map questions to owners, evidence, methods and data gaps.
What can customers ask for?
Understand organizational, product, activity, methodology and assurance requests.
Is the request mandatory?
Separate commercial requests from contractual and regulated reporting requirements.
Have an actual request to decode?
Paste the wording into our browser-based Carbon Request Decoder and turn it into requirements, data needs and clarification questions.
If you are collecting data from your own suppliers
Start by identifying which Scope 3 categories matter, which suppliers drive the largest or most decision-useful emissions, and which data can realistically improve from estimates to supplier-specific information over time. Assess your carbon-data readiness to identify gaps in ownership, methodology and supporting evidence before requesting more supplier data. If spreadsheets and manual follow-ups are becoming difficult to manage, take the Software Need Assessment before evaluating platforms.