The world's leading voluntary GHG program

Governance & Development


The Verified Carbon Standard (VCS) Program is managed by Verra with the support of the VCS Program Advisory Group. The Advisory Group is a multi-stakeholder body that helps ensure that the VCS Program serves its users in an effective and efficient manner, and drives practical and robust solutions to mitigating climate change.


Verra is committed to making certain that the VCS Program reflects the latest scientific research and is continually improved with respect to the consistency and accuracy of GHG emissions accounting. We follow ISEAL’s Codes of Good Practice in the ongoing development of the VCS Program.

Previous versions of the VCS Program can be found here.

The current version, VCS Version 4, was developed through a consultative process comprising two 60-day public consultations and engagement with many individual stakeholders, including project developers, methodology developers, validation/verification bodies, trade associations, NGOs, and other market participants.

VCS Version 4 incorporates several changes to existing VCS Program rules and requirements. The VCS Version 4 Rules Map outlines where specific requirements from the VCS Version 3 program documents can be found in the VCS Version 4 program documents, and whether substantive changes to existing requirements were made or new requirements added.

All VCS Version 4 documents are effective on the issue date, unless otherwise stated in the VCS Version 4 Summary of Effective Dates.

Issues Currently Under Development

Verra is considering several updates to the VCS Program documents intended to strengthen or expand the scope of the program and to ensure that projects deliver real, permanent, and additional emission reductions and removals. The updates include:

December 2021 Consultation

  • Proposing the development of a long-term reversal monitoring system

This public consultation is open from 15 December 2021 to 14 February 2022. We will then review all input received and post a summary of contents.

Details of a webinar about this consultation will be shared in early January.

Previous Version 4 Updates

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