Scope 3 Supplier and Value Chain Emissions Software

Cover all 15 Scope 3 categories. Start with spend-based, upgrade to supplier-specific. Data quality tagged on every calculation so disclosure matches the evidence.

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Scope 3 is where carbon accounting gets hard. Activity data sits in supplier emails, procurement spreadsheets, and invoices. The GHG Protocol Scope 3 Standard covers 15 categories with radically different data collection patterns. SEC Climate, CSRD, and SB 253 all require material Scope 3 disclosure by category.

The tier progression

  • Spend-based: multiply supplier spend by industry EEIO coefficient. Broad coverage, low accuracy. Good starting point.
  • Activity-based: multiply a physical quantity (kWh, tonne-km, kg shipped) by a published factor. Better accuracy than spend-based.
  • Supplier-specific: use primary data provided by the supplier. Highest accuracy; required for material categories under reasonable assurance.

What OffGridFlow gives you

  • CSV and SAP/ERP connectors to ingest procurement, logistics, and travel data
  • Per-category calculation methods across all 15 categories
  • PCAF tier tagging for Investment category (financed emissions)
  • Supplier-request templates to collect primary data from your vendors
  • Year-over-year tier progression view so you can demonstrate data quality improvement

Frequently Asked Questions

How do you handle suppliers that do not report emissions data?

Start with spend-based calculations using EEIO coefficients (documented in the methodology library). As suppliers report primary data, upgrade those categories to activity-based or supplier-specific. Each calculation is tagged with its data quality tier so your disclosure matches reality.

Which Scope 3 categories are supported?

All 15 GHG Protocol Corporate Value Chain categories: purchased goods and services, capital goods, fuel and energy activities, upstream transport, waste, business travel, employee commuting, upstream leased assets, downstream transport, processing of sold products, use of sold products, end-of-life treatment, downstream leased assets, franchises, and investments.

Can OffGridFlow ingest supplier data automatically?

Yes, via CSV upload or direct SAP/ERP connector. Supplier-reported data can be mapped to specific Scope 3 categories and tied to the source record for traceability. CDP-style supplier response imports are supported.

How do you flag data quality for Scope 3?

Each calculation records its data quality (measured, estimated, supplier-specific, spend-based, default). Aggregate reports show the distribution of data quality tiers so stakeholders see the basis of the disclosure. CSRD, SEC, and SB 253 all require this transparency.

Related Pages

Continue the research path with adjacent framework, role, and implementation pages.

Scope 1, 2, 3 reporting
See how supplier data fits into the overall emissions program.
For procurement teams
Operational guidance for supplier collection workflows.
SAP carbon reporting
Feed supplier and spend data from ERP systems.

Ready to see it with your data?

Upload a CSV and generate your first compliance report in under two hours. No consultant engagement required.

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OffGridFlow calculates emissions using documented GHG Protocol methodology. Reports are drafts; customers are responsible for verification before regulatory submission.