Illustration of Scope 3 supplier emissions reporting for California SB 253 — GHG Protocol value chain methodology and 5-step vendor engagement program
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Scope 3 Supplier Emissions for SB 253: 5-Step Vendor Engagement Guide

BySW Accounting admin

How do California companies collect Scope 3 supplier emissions data for SB 253? California’s SB 253 requires companies with over $1 billion in U.S. revenue doing business in California to disclose Scope 1, 2, AND 3 greenhouse gas emissions — with Scope 3 disclosure due January 1, 2027 (based on 2026 fiscal year data). Because…