A light update focused on scopes 1 and 2 and the 2 or 3 largest scope 3 emission categories takes 2 to 4 consultant-days. Repeating a full assessment every year, by contrast, means paying again for a full engagement each year, around €10,000 to €30,000 excl. VAT for an SME. Over a 4-year cycle, alternating full assessments and light updates therefore costs far less than a full annual assessment. Automated collection from ERP systems and invoices should further reduce update costs.
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