[BEGES](/en/blog/beges-france-mandatory-ghg-report/) is a regulatory requirement (Articles L. 229-25 of the Environmental Code) concerning certain companies according to size and activity. Diag Décarbon'Action is a financial assistance programme: it creates no obligation, but funds an assessment. The 2 do not overlap: the Diag is reserved for companies not subject to BEGES, and a company becoming subject later can reuse its Diag method and data for its first publication.
Read the source article: Diag Décarbon'Action 2026: price, eligibility, process