SCOPE 3 CARBON ACCOUNTING
Automate Scope 3 Category 1 Calculations
Extract supplier spend from invoices, classify against GHG Protocol emission factors, and generate CSRD-ready Scope 3 Category 1 reports with complete audit lineage.
What is Scope 3 Category 1?
Scope 3 Category 1 covers emissions from purchased goods and services — typically 60-80% of a company's total carbon footprint. This includes raw materials, office supplies, professional services, and contracted manufacturing.
The GHG Protocol provides two calculation methods:
- Spend-based method: Total spend × emission factor (tCO2e per $). Easiest to implement, works with existing invoice data.
- Supplier-specific method: Supplier-reported emissions. More accurate, but requires supplier engagement.
ZeroDocPro automates the spend-based method by extracting supplier spend from invoices and mapping to EXIOBASE or EPA emission factors.
The Manual Calculation Problem
Most companies calculate Scope 3 Category 1 by manually exporting invoice data from ERP systems, categorizing suppliers in spreadsheets, and applying emission factors. This process is time-consuming, error-prone, and not auditable.
How ZeroDocPro Automates It
Upload Supplier Invoices
Drag and drop PDFs or connect to ERP exports (CSV/Excel). Works with QuickBooks, Xero, SAP, NetSuite invoice exports.
Extract Invoice Data
AI extracts supplier name, invoice total, line items, and purchase dates. Handles multi-currency, multi-page invoices, and scanned documents.
Supplier Classification
Suppliers mapped to GHG Protocol categories using ML and industry databases. Categories include: Construction, IT Services, Marketing, Raw Materials, Professional Services, etc.
Emission Factor Application
EXIOBASE, EPA, or custom emission factors applied per category. Calculation: Spend (USD) × Emission Factor (tCO2e/$) = Total Emissions.
Review & Export
Review flagged suppliers (5-10% typically), approve classifications, download CSRD-ready report with SHA-256 hash lineage.
GHG Protocol Categories Covered
ZeroDocPro classifies suppliers across all major GHG Protocol Category 1 sub-categories:
CSRD & ESRS E1 Compliance
The Corporate Sustainability Reporting Directive (CSRD) requires EU companies to report Scope 3 emissions with limited assurance starting in 2025. ESRS E1 mandates:
Calculation Methodology Disclosure
Must disclose whether spend-based, supplier-specific, or hybrid method was used. ZeroDocPro documents method and emission factor sources in every report.
Data Quality Assessment
Must report confidence levels and data gaps. ZeroDocPro provides confidence scores on every supplier classification.
Audit Trail & Lineage
Assurance auditors require traceability to source documents. Every emission calculation links back to the source invoice with SHA-256 verification.
Year-over-Year Comparability
Emission factors and calculation rules are versioned. Historical reports remain defensible even if factors update.
Emission Factor Sources
EXIOBASE (Default)
Coverage: 200+ product/service categories
Multi-regional input-output database. Most comprehensive for services.
EPA EEIO
Coverage: 400+ US industry codes
US-specific emission factors. Best for domestic suppliers.
Custom Factors
Coverage: Upload your own
Use supplier-specific data or industry benchmarks. Full control and traceability.
Time & Cost Savings
vs manual spreadsheet method
vs industry databases
meets CSRD assurance requirements
Pricing
Free trial includes 50 invoice extractions. Paid plans start at $199/month for unlimited suppliers and quarterly reports. Enterprise plans available for multi-entity corporations.
Get Your First Scope 3 Report
Upload Q1 2024 invoices and see your Category 1 emissions breakdown in minutes. No credit card required for trial.