They multiply a number of working days by their daily rate, around €800 to €1,200 excl. VAT for a senior climate consultant. This number of days depends mainly on 3 variables: the quality and centralisation of your data (collection accounts for 60 to 70% of assignment time), the desired detail (spend-based ratios or physical data for key sources) and your teams’ responsiveness. Company size, taken alone, predicts the cost poorly: a company with 2,000 employees and well-maintained data may require 12 days, compared with 20 for an SME with 80 employees and disorganised accounts.
Read the source article: Bilan Carbone® cost in 2026: €10,000 to €30,000 excl. VAT