Belgium · EU compliance · 2026
Carbon accounting software for companies in Belgium
Belgian companies report sustainability information under the CSRD — transposed into the Code of Companies and Associations — using the ESRS, with the sustainability statement filed digitally to the National Bank of Belgium. CarbonTool gives you an audit-ready emissions inventory: Scope 1, 2 and 3 on one data backbone, with CSRD, VSME, GRI, CDP and ISSB outputs, multi-language reporting, transparent EUR pricing and EU data residency.
The short answer
Yes — mandatory sustainability reporting applies in Belgium. Belgium has transposed the EU Corporate Sustainability Reporting Directive (CSRD) into national law through the Act of 2 December 2024, which amends the Belgian Code of Companies and Associations. In-scope companies report using the European Sustainability Reporting Standards (ESRS), on a double-materiality basis, and file the sustainability statement as part of the management report with the National Bank of Belgium in digital (ESEF / iXBRL) format. The largest companies (listed, credit and insurance entities with more than 500 employees) have reported since financial year 2024; for the next waves of large companies the timelines and scope have been pushed back and narrowed by the EU Omnibus simplification package, so the population that must report is smaller and later than originally legislated. For carbon accounting itself, CarbonTool is a strong fit for Belgian companies: it produces an auditable Scope 1–3 inventory aligned to CSRD, VSME and other frameworks, with transparent EUR pricing.
Mandatory sustainability & GHG reporting requirements in Belgium
Belgium does not run a separate national greenhouse-gas reporting scheme for corporate accounts in the way some countries do — its corporate sustainability framework is the EU CSRD, transposed domestically. The picture below reflects the position in 2026, including the changes from the EU Omnibus simplification package. Because that package is still being transposed into Belgian law, several thresholds and dates are in transition; treat the specifics as indicative and confirm them for your company.
The governing law
The CSRD was transposed into Belgian law by the Act of 2 December 2024 (published in the Belgian Official Gazette on 20 December 2024, in force 30 December 2024), which amended the Code of Companies and Associations (Wetboek van vennootschappen en verenigingen / Code des sociétés et des associations) and related financial-supervision rules. In-scope companies report against the European Sustainability Reporting Standards (ESRS) and must apply a double-materiality assessment — disclosing both how sustainability matters affect the business (financial materiality) and how the business affects people and the environment (impact materiality).
Who must report, and when
The original CSRD phases obligations in by company size. The EU “stop-the-clock” directive (2025) then postponed later waves by two years, and the final Omnibus I agreement (reached December 2025) narrowed the scope. The resulting picture for Belgian companies:
Wave 1 — reporting since FY2024
Large Belgian public-interest entities — listed companies, credit institutions and insurers with more than 500 employees, already covered by the former NFRD — have reported under ESRS since financial year 2024 (first reports published in 2025).
Wave 2 — other large companies, delayed
Other large Belgian undertakings were originally due to report on FY2025 (in 2026). The EU "stop-the-clock" directive postponed this by two years, and the final Omnibus re-scoped it, so this cohort is later and smaller than first legislated.
Wave 3 — listed SMEs, delayed
Listed Belgian SMEs (excluding micro-entities) were set to report from FY2026. This wave has been delayed by two years, and under the Omnibus re-scoping mandatory reporting for many smaller listed companies is reduced — with VSME as the voluntary route.
Re-scoped by Omnibus
The final Omnibus I deal (December 2025) re-targets mandatory CSRD at companies with more than 1,000 employees and over €450m net turnover. Belgium must transpose these changes on the EU timetable, so confirm the exact scope and dates for your company.
The size thresholds
Under the originally transposed CSRD, a Belgian “large” undertaking is one exceeding at least two of three criteria: more than 250 employees, a balance-sheet total above €25 million, and net turnover above €50 million. The final Omnibus I deal re-targets mandatory CSRD reporting at substantially larger companies — broadly those with more than 1,000 employees and net turnover above €450 million. The effect is that many mid-sized Belgian companies that were expecting to enter scope will fall out of mandatory reporting, while still facing data requests through value chains. These thresholds are being transposed into Belgian law on the EU timetable, so the exact figures and effective dates that apply to your company should be confirmed.
Scope 3 and assurance
The ESRS climate standard (ESRS E1) requires disclosure of Scope 1, Scope 2 and Scope 3 greenhouse-gas emissions where material — and for most Belgian companies Scope 3 (purchased goods and services, transport, business travel and the wider value chain) dominates the footprint. On assurance, CSRD reports require limited assurance from an accredited auditor or independent assurance provider; the previously planned escalation to “reasonable assurance” has been withdrawn under the Omnibus package. Limited assurance still means every figure must be traceable to its source, unit, emission factor and data-quality level — which is difficult to sustain in spreadsheets.
How reports are filed in Belgium
The sustainability statement is not a separate filing: it forms an integral part of the (consolidated) management report, filed with the National Bank of Belgium’s Central Balance Sheet Office. Reports must be prepared in a digital, machine-readable format (ESEF — XHTML with iXBRL digital tagging), the same single-electronic-reporting approach used for financial statements. The National Bank also publishes a list of companies it considers subject to the CSRD, which is a useful reference point but is not a substitute for assessing your own obligation.
The SME and VSME picture
Most Belgian SMEs are not directly in mandatory CSRD scope — and after the Omnibus re-scoping, fewer will be. But many are pulled in indirectly: larger Belgian and EU customers, banks and investors request sustainability and emissions data from their suppliers. The EU’s VSME (Voluntary Sustainability Reporting Standard for SMEs) is the proportionate answer — a lighter, standardised module SMEs can use to respond to those requests. The European Commission issued a recommendation on the VSME in 2025, with a VSME Delegated Act expected in 2026, and the Omnibus introduces a value-chain cap: in-scope companies generally cannot demand more from suppliers of 1,000 employees or fewer than the VSME sets out. For a Belgian SME, building a basic Scope 1–3 inventory now is the practical way to be ready for those requests.
Related EU rules that touch Belgian companies
Alongside CSRD, in-scope Belgian companies report EU Taxonomy alignment (the share of turnover, capex and opex that is environmentally sustainable), and Belgian importers of carbon-intensive goods such as steel, cement, aluminium and fertilisers are affected by CBAM, the Carbon Border Adjustment Mechanism, which requires embedded-emissions data on imports — a value-chain exercise closely related to Scope 3. All of these draw on the same underlying activity and emissions data, so a single inventory backbone avoids duplicated effort.
This is general information for 2026, not legal or compliance advice. Belgian and EU sustainability rules are evolving — the Omnibus simplification package is still being transposed, and thresholds, waves and assurance requirements may change. Confirm the obligations that apply to your company with a qualified legal, audit or sustainability advisor before relying on anything here.
How to comply: why carbon accounting software
Whether you are a large Belgian company reporting under CSRD or an SME answering customer and bank requests with VSME, the foundation is the same: a complete, defensible greenhouse-gas inventory. A purpose-built carbon accounting platform turns that from a one-off spreadsheet project into a repeatable, auditable process:
Build a complete Scope 1, 2 and 3 inventory
Capture direct emissions (Scope 1), purchased energy (Scope 2) and value-chain emissions (Scope 3) on GHG-Protocol methodology. Spend-based factors give a fast first estimate; primary supplier data refines the hotspots over time.
Keep an audit trail on every figure
CSRD limited assurance and EU Taxonomy disclosures require traceability — source, unit, emission factor and data-quality level for each number. A platform with a built-in audit trail and data-quality scoring survives assurance review where spreadsheets do not.
Generate framework-ready outputs
Produce ESRS / CSRD disclosures, VSME for SMEs, plus GRI, CDP and ISSB from the same data backbone — and feed the EU Taxonomy and CBAM data exercises from the same inventory rather than rebuilding it each time.
Report consistently, year after year
Sustainability reporting is recurring, not one-off. A repeatable platform with versioned data, multi-entity consolidation and digital-ready outputs makes each reporting cycle faster and more defensible than the last.
See how the carbon accounting and reporting modules fit together, and how CarbonTool supports CSRD reporting across Europe.
Why CarbonTool for Belgium
CarbonTool is built for exactly the obligations Belgian companies face — and for the reality that Belgium is a multilingual, export-oriented economy with complex group structures. The local fit:
Full framework coverage
CSRD/ESRS, VSME, GRI, CDP, ISSB and PCAF from one data backbone — so a Belgian company reports once as it moves from voluntary VSME to mandatory CSRD, or runs several frameworks side by side.
Multi-language reporting
Belgium is trilingual (Dutch, French and German) and internationally facing. CarbonTool supports multi-language reporting so outputs suit local stakeholders, auditors and head-office groups alike.
Multi-entity consolidation
Many Belgian businesses sit within groups or holding structures. CarbonTool consolidates emissions across multiple legal entities and sites, mirroring the consolidated management report that is filed with the National Bank of Belgium.
ERP, procurement and custom integrations
Connect the financial and procurement systems that hold your activity data, and build custom connectors where needed — turning the data you already maintain into a spend- and activity-based inventory.
Self-serve or done-for-you delivery
Run it yourself, have CarbonTool deliver it as a managed service, or white-label it — whichever suits your team. Belgian SMEs without an in-house sustainability team get the same framework depth as large groups.
Transparent EUR pricing & EU data residency
Pricing is published in euros, so you can budget without a sales call, and sustainability data stays within the EU — important for GDPR and for Belgian and EU procurement teams that require European hosting.
CarbonTool serves companies from Romania and across Europe to the UK, the Middle East, Asia and the Americas, with framework depth that scales from a single Belgian SME to a multi-entity European group. Explore enterprise carbon accounting or see transparent EUR pricing.
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Yes. The EU Corporate Sustainability Reporting Directive (CSRD) is mandatory in Belgium, transposed by the Act of 2 December 2024 which amended the Code of Companies and Associations. The largest companies — listed entities, credit institutions and insurers with more than 500 employees — have reported under the ESRS since financial year 2024. For later waves of large companies, the EU "stop-the-clock" directive and the final Omnibus package have delayed the timelines and narrowed the scope, so fewer companies are in mandatory scope, and later, than originally legislated. Confirm whether your company is in scope, as the rules are still being transposed.
In-scope Belgian companies report under the European Sustainability Reporting Standards (ESRS) on a double-materiality basis, covering environmental, social and governance matters. The climate standard (ESRS E1) requires greenhouse-gas disclosures across Scope 1, 2 and 3 where material. The sustainability statement is filed as part of the management report with the National Bank of Belgium in a digital, machine-readable format (ESEF / iXBRL). In-scope companies also report EU Taxonomy alignment, and importers of carbon-intensive goods are affected by CBAM. SMEs are largely outside mandatory scope but often report voluntarily using VSME to answer customer and bank requests.
For companies in scope of CSRD, yes — the ESRS climate standard (ESRS E1) requires disclosure of Scope 3 (value-chain) emissions where they are material, and for most Belgian companies Scope 3 is the largest part of the footprint. Smaller companies not in mandatory scope are not required to report Scope 3, but are increasingly asked for value-chain data by larger customers, banks and investors; the EU value-chain cap limits how much can be demanded from suppliers of 1,000 employees or fewer. Building a Scope 1, 2 and 3 inventory now is the practical way to be ready.
Wave 1 (large listed, credit and insurance entities with more than 500 employees) has reported since financial year 2024, with first reports published in 2025. Wave 2 (other large companies) and Wave 3 (listed SMEs) were originally due to follow on FY2025 and FY2026, but the EU "stop-the-clock" directive postponed them by two years and the final Omnibus deal re-scoped and re-targeted mandatory reporting at companies with more than 1,000 employees and over €450m turnover. Because Belgium is still transposing the Omnibus changes, confirm the exact deadline that applies to your company with a qualified advisor.
Most Belgian SMEs are not in mandatory CSRD scope, and after the Omnibus re-scoping fewer will be. However, many are pulled in indirectly when larger customers, banks and investors request sustainability data. The EU VSME (Voluntary Sustainability Reporting Standard for SMEs) is a proportionate, standardised module SMEs can use to respond — the European Commission issued a recommendation on it in 2025, with a VSME Delegated Act expected in 2026. CarbonTool supports VSME alongside CSRD from the same data backbone, so a Belgian SME can start light and scale up.
The best carbon accounting software for a Belgian company is one that produces an audit-ready Scope 1, 2 and 3 inventory and turns it into the framework outputs you actually need — CSRD/ESRS, VSME, GRI, CDP and ISSB. CarbonTool covers all of these from one data backbone, with multi-language reporting, multi-entity consolidation, ERP and procurement integrations, transparent EUR pricing, EU data residency, and a choice of self-serve or done-for-you delivery — a strong fit for Belgian SMEs and groups alike.
CSRD and VSME, built on one inventory.
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