ESG (Environmental, Social and Governance) reporting describes structured disclosures of an organisation's sustainability performance across environmental, social and governance dimensions. ESG started as voluntary reporting primarily for investor consumption; in DACH the regulatory framework has tightened substantially since 2022, with CSRD (Corporate Sustainability Reporting Directive) bringing thousands of mid-market companies into mandatory structured reporting from 2025 onwards.
Regulatory frameworks
CSRD (Corporate Sustainability Reporting Directive): EU directive applying to large companies in phased rollout from 2024-2028. Mandates structured reporting under ESRS standards with third-party assurance. ESRS (European Sustainability Reporting Standards): 12 topical standards covering climate (E1), pollution (E2), water (E3), biodiversity (E4), circular economy (E5), workforce (S1), value-chain workers (S2), affected communities (S3), consumers (S4), business conduct (G1). EU Taxonomy: classification system identifying environmentally sustainable economic activities; CSRD reporting requires Taxonomy-aligned KPIs. GHG Protocol: international standard for greenhouse-gas accounting (Scope 1 direct emissions, Scope 2 purchased energy, Scope 3 value chain). SBTi (Science Based Targets initiative): validation framework for company-level emission-reduction targets.
Data sources
ESG metrics draw from many systems. ERP: energy purchases (electricity, gas, district heating from AP), fleet fuel consumption from expense management, business travel from T&E, supplier spend by category, headcount and turnover from HR module. Operational systems: production data from MES, water usage from utility-monitoring systems, waste data from facility-management systems. HR: diversity metrics, training hours, pay-equity data, safety-incident records. External: supplier-questionnaire responses, energy-supplier emission factors, government statistics. The complexity is the consolidation and conversion: heterogeneous source data in different units, partial coverage, manual data for metrics not yet automated. ERP rarely holds 100% of ESG data but is typically the largest single source.
ESG reporting tools
Enterprise platforms: SAP Sustainability Control Tower, Microsoft Sustainability Manager, Workiva, Watershed, Persefoni, Sphera SpheraCloud, IBM Envizi. Mid-market and DACH-specific: VERSO, Tanso (German-built, mid-market focus), Plan A, Cozero, Greenly, Sweep (French, growing DACH), Position Green, Worldfavor. Embedded in ERP: SAP S/4HANA includes sustainability modules; Oracle Cloud ERP includes ESG Reporting; Microsoft Dynamics 365 integrates with Microsoft Sustainability Manager. Disclosure-management: CCH Tagetik Disclosure Management, Workiva for the formatted ESEF and CSRD-compliant reports. For DACH mid-market subject to CSRD from 2025 or 2026, VERSO and Tanso are the most-commonly evaluated mid-market specialists, with Microsoft Sustainability Manager appealing to Microsoft-centric organisations.
Audit and assurance
CSRD mandates third-party assurance on sustainability reports. The initial requirement is limited assurance (less rigorous than financial audit), with the EU planning to move to reasonable assurance over time. Auditors check that disclosures follow ESRS, data quality is sufficient, controls are reliable. ERP-side requirements: audit-trail on sustainability data, documented data lineage from source to disclosed metric, segregation-of-duties on data entry and review, internal controls over manual adjustments. Companies attempting to assemble CSRD data in spreadsheets at year-end consistently produce assurance findings; those that integrate the data flow through ERP and dedicated ESG tools pass audit with much less friction. The operational discipline of CSRD reporting is the largest single CSRD-implementation cost, exceeding the tooling.
Large EU companies (over 250 employees, over 50 million EUR turnover, over 25 million EUR balance sheet) covered from FY 2025 reporting (filing 2026). Listed SMEs from FY 2026. Non-EU companies with significant EU activity from FY 2028. The 2025 EU omnibus simplification may adjust thresholds; verify current status before assuming scope.
Do we need a dedicated ESG tool or can spreadsheets work?
For first-year CSRD reporting with limited assurance, disciplined spreadsheet processes can work as a bridge solution. From year two onwards, dedicated tooling typically pays back through reduced compliance effort, lower audit fees and better data quality. Investment of 20,000-80,000 EUR per year in tools like VERSO or Tanso is common for mid-market CSRD-scope operations.
How does ESG reporting interact with ERP financial reporting?
Increasingly tightly. Financial close and ESG close are converging in timing and rigour. Many companies extend the monthly close to include ESG-relevant data capture. Audit-trail requirements parallel those of financial reporting. The data infrastructure that supports financial reporting (ERP, BI, consolidation tools) increasingly supports ESG reporting too.
