SB 253 GHG Accounting and Assurance
Updated:
May 1, 2025
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Overview
Develop an Inventory Management Plan (IMP)
Create clear documentation of emissions data sources, calculation methodologies, emissions factors, and assumptions to prepare for assurance. This will help auditors verify your emissions with confidence.
Engage Auditors Early and Run a Test Audit
Work with your assurance provider as early as possible. Many companies are conducting test runs using 2024 data to practice the assurance process before mandatory requirements kick in for 2025 data.
Prepare for a Two-Month Minimum Timeline for Assurance
Build at least 2 months into your reporting calendar for the end-to-end assurance process. This includes data preparation, documentation review, and potential follow-ups.
