SB 253 Software
SB 253 reporting is not only calculating CO₂e. It requires a defined boundary, clear data ownership, durable evidence and a review path. GreenKPO SB 253 compliance software helps teams build a traceable Scope 1 and Scope 2 reporting workflow — then extend into Scope 3 when ready.
Scope 1 source workflow
Fuel, combustion, fleet and process sources mapped to facilities, periods, factors and owners — with evidence attached at the record level.
Scope 2 source workflow
Electricity and purchased energy activity records, market/location method notes where used, and a clear path from bill to calculated figure.
Timing & official sources
Last reviewed: 16 September 2026
As reviewed on 16 September 2026, CARB describes a proposed deferral of the first Scope 1 and Scope 2 reporting deadline from 10 August to 10 November 2026. Check CARB’s corporate greenhouse gas reporting program page and rulemaking status page for the approved deadline, filing instructions and first-year requirements before submission. Do not present the proposed date as a confirmed final deadline. GreenKPO is the data, evidence and reporting workflow layer — not legal advice and not an automated CARB filing integration unless separately confirmed for your engagement.
Data control layer
- Units & periods — consistent measurement and reporting windows
- Duplicates & gaps — catch double loads and missing months early
- Estimation flags — label estimates so they stay visible in review
- Factor versions — keep calculation methods reproducible
Evidence chain
Every reported figure should be followable: figure → calculation → activity record → source file → owner → review history. That is the core of an SB 253 reporting tool buyers can defend under review.
Roles & approvals
Preparer
Loads sources, flags gaps, advances records to review.
Reviewer
Checks methods, evidence and estimation labels before lock.
Adviser access
Reviewer access can be scoped so advisers see the same evidence pack without owning source systems. Confirm permissions for your engagement in a walkthrough.
Reporting readiness output
Produce a readiness summary and evidence pack from controlled records. If gaps remain, ingest and validate SB 253 source data first, or run an SB 253 readiness review. For Scope 3, prepare supplier data for Scope 3.
Common questions
Is this the same as the readiness checklist?
The readiness checklist helps identify missing data and control gaps. The software supports the ongoing process of collecting records, reviewing evidence and preparing reporting outputs — not automated submission to CARB unless that integration is separately confirmed. A readiness review typically produces a gap register, evidence request list, remediation priorities and a reporting-readiness summary. Start with a readiness review if you are unsure what is missing.
Does GreenKPO guarantee compliance?
No. GreenKPO structures data, evidence and reporting workflow. Legal applicability, assurance opinions and filing decisions stay with counsel and assurance providers.
Where does Scope 3 fit?
Stabilize Scope 1/2 controls first, then use the supplier-data page for structured Scope 3 collection — not a mass-email questionnaire dump.
Move into a controlled SB 253 workflow
See the reporting workflow, or request a readiness review if gaps are still unclear.