Simplified ESRS: What Changed, What Didn't, and What to Do Before It Takes Effect
The European Commission adopted the simplified ESRS on 3 July 2026, cutting mandatory reporting datapoints by roughly 60%. The revised standards are still in their scrutiny period and are expected to take legal effect around 10 November 2026, becoming mandatory for financial year 2027. Double materiality survives largely intact. A new Voluntary Standard also caps what CSRD reporters can demand from smaller suppliers, which changes how you should prioritize supplier data requests.
If your sustainability, finance, or compliance team has spent 2026 waiting for the simplified ESRS to arrive, it already has. The European Commission adopted the revised European Sustainability Reporting Standards on 3 July 2026, alongside a new Voluntary Standard for smaller value-chain partners. Neither is law yet. Both are sitting inside a scrutiny period that the European Parliament and Council can object to, and both are expected to take legal effect around 10 November 2026, with mandatory application from financial year 2027.
That gap between "adopted" and "in force" matters more than it sounds. Teams that read only the July headline are often still working from EFRAG's draft advice, not the Commission's final text, and several of the final adjustments change what a reporting team should build. This piece walks through what changed, what's still open, and the one decision your team needs to make before the standard becomes mandatory: whether to apply it early, for financial year 2026, or wait for 2027.
What Is the Simplified ESRS?
The simplified ESRS is the European Commission's July 2026 delegated act revising the European Sustainability Reporting Standards that CSRD reporters use. It cuts mandatory datapoints by roughly 60%, simplifies structure, and takes legal effect once a Parliament and Council scrutiny period ends, expected around November 2026.
The European Sustainability Reporting Standards sit underneath the Corporate Sustainability Reporting Directive. The original version, known as ESRS Set 1, took effect in 2023 and asked reporters for more than a thousand datapoints across environmental, social, and governance topics.
Omnibus I, the directive that narrowed CSRD scope to companies with more than 1,000 employees and more than €450 million in net turnover, entered into force on 18 March 2026 and committed the Commission to simplifying those standards within six months. The Commission delivered early, adopting the revised ESRS and a new Voluntary Standard on 3 July 2026.
Timeline: From Omnibus I to Entry Into Force
The path from a political commitment to a binding standard runs through several distinct steps. Knowing exactly where things stand right now avoids two mistakes: assuming the simplified ESRS already applies, or waiting for a second announcement that isn't coming.
EFRAG delivered its final technical advice to the Commission on 3 December 2025, following a public consultation over the summer. Omnibus I then entered into force on 18 March 2026, starting a six-month clock for the Commission to act. Read our full breakdown of Omnibus I if you need the scope-reduction mechanics themselves.
The Commission published a draft delegated act for a further round of consultation on 6 May 2026, then formally adopted the revised ESRS and the new Voluntary Standard on 3 July 2026, ahead of its own deadline.
Both delegated acts now sit with the European Parliament and the Council for a scrutiny period of two months, extendable by two more. Neither institution can amend the text, only reject it outright. If neither objects, the acts publish in the Official Journal and take legal effect, which EY's own timeline analysis puts at around 10 November 2026. From that date, financial year 2027 reporters must comply, and financial year 2026 reporters can choose to adopt the new standard early.
What Actually Changed in the Simplified ESRS
The revised ESRS cut mandatory datapoints by about 60% and total datapoints, including voluntary ones, by about 70%. The Commission also added presentation flexibility, expanded interoperability with ISSB and GRI standards, and extended several reliefs EFRAG had already proposed.
Grant Thornton's summary of the final adjustments lists the specific changes the Commission made beyond EFRAG's original draft. Companies no longer have to follow the original four-section report structure rigidly. ESRS E1 now lets companies reuse climate scenarios built for other purposes instead of building new ones. The relief on disclosing anticipated financial effects was extended by a further year. The standards also lean harder on interoperability, adding explicit references to ISSB, SASB, and GRI standards as acceptable sources for entity-specific disclosures.
None of this is a rounding error. Legal analysis from Arendt puts the expected reporting-cost reduction at over 30% per company, based on the Commission's own estimate.
What Hasn't Changed: Double Materiality
Double materiality is still the foundation of ESRS reporting. Cutting datapoints did not remove the requirement to assess both financial and impact materiality, and the assessment itself was tightened in places, not loosened.
Arendt's analysis is explicit on this point: a lower datapoint count does not reduce the work of the double materiality assessment, because that assessment is what determines which of the remaining datapoints actually apply to a given company. A shorter standard with the same materiality process attached is not automatically a shorter project.
This is the gap most coverage of the simplified ESRS skips over. Treating "simplified" as "smaller scope of work" risks under-resourcing the one step that hasn't gotten any easier.
The New Voluntary Standard, and What It Means for Your Suppliers
Alongside the revised ESRS, the Commission adopted a separate Voluntary Standard for undertakings outside CSRD scope, particularly smaller value-chain partners. It sets a ceiling on what a CSRD reporter can ask those partners to disclose, building on EFRAG's earlier work on a voluntary SME standard.
Analysis of the new standard describes it as protecting value-chain partners with roughly 1,000 employees or fewer from open-ended data requests cascading down from a CSRD reporter's own disclosure obligations. In practice, a CSRD-reporting manufacturer can no longer ask every supplier for everything. The Voluntary Standard defines the ceiling.
That makes supplier prioritization a compliance question, not just good practice. KWS, one of carbmee's customers, calculated carbon footprints across 30,000 suppliers and found that its top 50 suppliers drive 55% of its Scope 3 emissions. Under the new Voluntary Standard, that kind of prioritization is exactly what should determine which suppliers deserve a detailed data request and which don't. carbmee's supplier engagement model is built around that same logic: fewer, better-targeted requests to the suppliers that actually move the number.
Early-Adopt the Simplified ESRS for FY2026, or Wait for FY2027?
Once the delegated act takes effect, expected around 10 November 2026, every in-scope reporter faces the same choice: apply the revised ESRS starting with financial year 2026, or continue with the original ESRS Set 1 through one more reporting cycle.
The decision splits fairly cleanly by profile. Companies still finalizing their first CSRD report under ESRS Set 1, often called Wave 1 reporters, generally gain little from switching mid-cycle. Their data pipelines are already built against the original standard, and re-tooling now adds risk to a report that's largely done. Heraeus, for example, built its full CSRD-ready data pipeline, including 2024 figures, in two months under the original standard. A team in that position is usually better off finishing on the standard it started with.
Companies entering CSRD scope for the first time under Wave 2, reporting for financial year 2027, have the opposite calculus. Building a data pipeline against the revised, shorter datapoint list from the start avoids collecting information that won't be required, and most of these companies have not yet locked in a reporting architecture.
A third group, the roughly 80% of previously in-scope companies that Omnibus I moved out of CSRD entirely, faces a different question: whether to report at all, and if so, whether to use the new Voluntary Standard instead
Where This Fits in Your Compliance Calendar
The simplified ESRS doesn't arrive in isolation. Most industrial manufacturers reading this are also tracking CBAM, which entered its definitive phase on 1 January 2026 and now carries real certificate costs, alongside EUDR and PPWR deadlines that move on their own separate tracks.
None of these calendars share a data model unless you build one that does. A reporting architecture that treats CSRD, CBAM, EUDR, and PPWR as four separate spreadsheets multiplies the same supplier-data collection exercise four times over. One built on a shared, transactional data foundation reduces it to one.
What This Means for Your Reporting Team
The simplified ESRS is real, adopted, and not yet law. Three things matter most. The revised standards cut mandatory datapoints by roughly 60% without touching the double materiality assessment that determines which of them apply to you. Legal effect is expected around 10 November 2026, with mandatory application from financial year 2027. The new Voluntary Standard changes how much you can ask smaller suppliers, which makes supplier prioritization a compliance question now, not just a best practice.
Before the scrutiny period ends, the one decision worth making deliberately is whether to early-adopt for financial year 2026 or wait for 2027, sorted by which group your entities fall into.
