CSRD Reporting Software: What to Look For in 2026

Post Omnibus, EU Corporate Sustainability Reporting Directive (CSRD) compliance is now an immediate, upcoming obligation for most large EU companies. Organisations that were already subject to the Non-Financial Reporting Directive had their first CSRD reporting obligation for FY2024 data, disclosed in 2025. Now, the Wave 2 rollout extends to large companies with more than 1,000 employees for FY2027, with the first reports due in 2028.

CSRD reporting software exists to organise, streamline, and operationalise this genuinely complex disclosure requirement (even after the Omnibus simplification). Unlike voluntary ESG reporting, CSRD mandates specific data points across 12 ESRS topical standards, requires a structured double materiality assessment, and mandates limited third-party assurance of the disclosed information. The data collection, quality control, reporting, and review burdens can significant, and manual approaches can take months, cost tens or even hundreds of thousands of euro, and be a resource drain across the organisation. Effective CSRD reporting software aims to address that with helpful automation, data management, organisation, and structuring capabilities, alongside other benefits like data integrations, dashboards, KPI tracking, and benchmarking.

What CSRD imposes on your reporting infrastructure

Before evaluating software, it helps to understand exactly what CSRD requires at the data and process level:

Double materiality assessment

CSRD requires organisations to assess materiality from two perspectives: impact materiality (how the company affects people and the environment) and financial materiality (how sustainability topics or IROs affect the company's financial performance). The assessment must be documented, auditable, and used to determine which ESRS standards and data points are material and therefore subject to disclosure. Software must support this assessment workflow — not just store the output of a consultant's exercise.

Example: integrated double materiality support with optional AI materiality recommends inside Brightest

ESRS data points — the full scope

The European Sustainability Reporting Standards comprise two cross-cutting standards (ESRS 1 and ESRS 2) and 10 topical standards across environment (E1: Climate change, E2: Pollution, E3: Water and marine, E4: Biodiversity and ecosystems, E5: Resource use and circular economy), social (S1: Own workforce, S2: Workers in the value chain, S3: Affected communities, S4: Consumers and end-users), and governance (G1: Business conduct). Each standard contains mandatory and voluntary disclosure requirements, with hundreds of individual data points in aggregate.

There's also the associated question of data collection and processing for each of these ESRS sections. For example, are you looking for a system to simply enter the final outputs, or do you want a system with a full chain of custody (going from, for example, energy bills to emissions calculations to disclosure data points, all connected together)? It's important to consider cross-departmental collaboration, roles and responsibilities for different disclosure sections, where specific in-scope or material information lives inside your organisation, and any associated data gaps that need to be addressed.

Most organisations subject to CSRD will be required to report against ESRS E1 (climate) and ESRS S1 (own workforce) at minimum — and likely several others depending on materiality outcomes. A platform must collect and map to the specific data points within each standard, not just the standard at a headline level. Small-to-medium organisations scoped out of CSRD reporting via the Omnibus legislation should instead refer to the voluntary VSME standard.

Assurance requirements

CSRD requires limited assurance of sustainability disclosures from 2025 (or 2027 for Omnibus Wave 2 companies), with a pathway to reasonable assurance phased in. This means your data collection, calculation methodology, and disclosure process must be documented well enough for an external auditor to verify. Software that doesn't maintain source documentation, methodology records, and a versioned audit trail creates a significant assurance preparation burden (and associated costs).

XBRL digital tagging

CSRD disclosures will eventually need to be published in a machine-readable format using the ESRS XBRL taxonomy. This is a technical requirement that most existing ESG software tools weren't built for. Check specifically whether a platform generates XBRL-tagged output natively or requires a third-party tagging step after export.

What CSRD reporting software must handle

Not every ESG, sustainability or carbon platform is fit for CSRD reporting — particularly large, complex, or global enterprises. These are the functional requirements that distinguish CSRD-capable software from general sustainability tools:

• Double materiality workflow — structured assessment process with stakeholder input capture, impact and financial materiality scoring, and auditable output that determines which ESRS topics are in scope
• ESRS-native data model — data collection fields mapped directly to ESRS data points, not retrofitted via report templates
• Value chain data collection — ESRS S2 and ESRS E1 (Scope 3 categories) require data from across the value chain, including suppliers and customers. The platform must support supplier surveys and third-party data collection at scale
• GHG and environmental calculation methodology documentation — ESRS E1 requires gross Scope 1, 2, and 3 emissions with methodology explanations for each Scope 2 approach and for material Scope 3 categories
• XBRL output capability — machine-readable tagging of ESRS disclosures for digital filing
• Audit trail for limited assurance — source documentation, calculation methodology, change history, and user access logs for each disclosed data point
• Integration with ERP, HR, and other systems and data sources — many ESRS data points (particularly S1 own workforce metrics) come from other business systems; manual re-entry or relying solely on spreadsheets or sharepoints creates audit risk

Example: Easy, efficient, multi-format CSRD report data exports, including XBRL

Common pitfalls in CSRD software selection

Choosing a carbon-only tool for a full-ESRS requirement

Carbon accounting platforms are well-suited to ESRS E1 (climate change), but CSRD encompasses eleven other topical standards. If your materiality assessment identifies ESRS S1 (own workforce), ESRS S2 (workers in the value chain), or any environmental standards beyond E1, a carbon-only tool leaves significant gaps. Assess your likely materiality outcomes before shortlisting platforms.

Starting implementation before materiality is scoped

CSRD software implementation typically takes 2–6 months. Starting before your double materiality assessment is complete means you may be building data collection workflows around the wrong ESRS standards. Run or commission the materiality assessment first, then configure the platform around your material topics.

Underestimating data collection, particularly value chain data

When preparing for CSRD, it's import to consider your organisation's overall sustainability and ESG data maturity, processes, and readiness. ESRS E1 requires disclosure on Scope 3 emissions across material categories, and ESRS S2 requires disclosure on working conditions and human rights across the value chain. Collecting this data from suppliers requires structured outreach, response tracking, and data validation. Generic ESG platforms that handle internal data collection well often have inadequate tools for supplier data collection at scale.

Overlooking XBRL requirements

CSRD mandates the evantual digital tagging of the sustainability statement using the ESRS XBRL taxonomy. Ask explicitly: does the platform generate XBRL-tagged output in the format required by the CSRD delegated acts?

Evaluating CSRD software: a practical checklist

• Does the platform support double materiality assessment workflow, or does it only store the output?
• Is the data model ESRS-native (data points mapped to specific ESRS requirements) or template-based (generic ESG data mapped to ESRS in a report layer)?
• Does the platform generate XBRL-tagged output in the ESRS taxonomy format?
• How does the platform collect Scope 3 and value chain data from suppliers — survey tools, API integrations, AI, manual upload, other workflows?
• Has the platform been used in a successful limited assurance engagement? Can the vendor provide a reference?
• Does the platform cover ESRS S1 (own workforce) data collection, including HR system integration?
• What is the implementation timeline, and what resource is required from your team versus the vendor?
• Assess your team's technical capacity — does the platform require IT resource to implement, or can a sustainability manager set it up independently? Do you need specific integrations or data connectors?
• Also consider other aspects of the commercial relationship — do you want a smaller partner who's potentially more agile, innovative, and hands on? do you want a "safer" large company who might not provide you the same level of personalized and responsive service? what is the platforms commercial proposition, advantages, and risks? These are all important to consider as well

CSRD is a multi-year implementation, not a one-time filing exercise. The post-Omnibus CSRD rollout extends through 2028, assurance requirements increase over time, and the ESRS standards themselves are subject to review and further revision by EFRAG. The software you choose should be built by a vendor actively tracking EU regulatory developments with a proven track record of CSRD preparation and reporting success.