Assessing and Comparing Carbon Credit Rating Agencies

The report evaluates the methodologies of carbon credit rating agencies BeZero, Calyx, Renoster, and Sylvera, highlighting a systemic lack of standardised quality assessment in the carbon market. It notes that while these agencies aim to increase transparency and mitigate risk, their approaches vary significantly, particularly in the use of algorithmic analysis versus direct testing and the treatment of additionality and leakage.

• The carbon market suffers from a fundamental lack of a universally accepted and detailed definition of carbon credit quality, which leads market participants to treat credits with increasing caution.
• Carbon credit rating agencies attempt to solve the lack of standardisation by separating robust credits from those that do not deliver, claiming to improve transparency, fair pricing, and the mitigation of reputational risk.
• Renoster's methodology is distinct from other agencies because it prioritizes algorithmic analysis over qualitative assessment and uses mostly implicit tests, whereas most other agencies use direct tests. Additionally, Renoster assesses leakage but does not include it in the final rating score.
• Significant differences exist across agencies regarding how they handle additionality scores to limit overall project scores, as well as their approaches to permanence benchmarks, buffer strength, co-benefits, safeguards, double-counting, and double-issuance.

APA

Carbon Market Watch (2023). Assessing and Comparing Carbon Credit Rating Agencies. https://carbonmarketwatch.org/publications/assessing-and-comparing-carbon-credit-rating-agencies/

Chicago

Carbon Market Watch. Assessing and Comparing Carbon Credit Rating Agencies. 2023. https://carbonmarketwatch.org/publications/assessing-and-comparing-carbon-credit-rating-agencies/.

Wikipedia

{{cite report |author=Carbon Market Watch |title=Assessing and Comparing Carbon Credit Rating Agencies |date=10 September 2023 |url=https://carbonmarketwatch.org/publications/assessing-and-comparing-carbon-credit-rating-agencies/ |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{carbonmarketwatch2023assessing, author = {{Carbon Market Watch}}, title = {{Assessing and Comparing Carbon Credit Rating Agencies}}, institution = {Carbon Market Watch}, year = {2023}, month = sep, url = {https://carbonmarketwatch.org/publications/assessing-and-comparing-carbon-credit-rating-agencies/}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }