Guides · Regulation · 20 pages
SB 253 readiness checklist
A practical, 20-page readiness checklist for SB 253 compliance. Designed for CFOs, controllers, and ops leaders, not sustainability specialists. Walks step by step from scoping determination through final CARB filing.
What’s inside
- Scope determination: am I actually in scope, and for which entities?
- Inventory build sequence: Scope 1 → Scope 2 → Scope 3, with timeline guidance
- Data sources: which finance systems, HR tools, and utility records to pull from
- Third-party assurance: who can do it, what they need, how long it takes
- CARB filing logistics: the portal, the format, the deadline
- What happens if you miss the deadline (and how to mitigate)
Our SB 253/261 compliance service manages the reporting and CARB filing end to end. Readiness starts with a defensible GHG inventory — see our carbon accounting service. For full regulatory details, see our California SB 253 regulation page.
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Need help, not a checklist?
SB 253 deadline is August 10, 2026. If your inventory isn’t built yet, the timeline is tight. Bring us where you are, we’ll map the path.