Not necessarily. The official factsheet excludes companies that have carried out a GHG assessment in the past 5 years, without distinguishing the tool used: a recent self-service assessment on a [SaaS](/en/blog/carbon-accounting-software-vs-consultancy/) platform can therefore prevent an application, to be checked with Bpifrance. After 5 years, the previous assessment no longer counts as a "previous assessment". However, if the company has previously used the Diag, it cannot benefit a second time.
Read the source article: Diag Décarbon'Action 2026: price, eligibility, process