CSRD for Non-EU Companies: When US, UK, and Other Third-Country Groups Must Report and How to Prepare

If your group is headquartered in the United States, the United Kingdom, Switzerland, Japan, or anywhere else outside the European Union, the CSRD is probably not on your home regulator's radar — but it may already be on yours. The directive reaches well beyond EU borders, and thousands of non-EU multinationals will publish their first CSRD-compliant sustainability statement before the end of the decade. Many will need help from a CSRD consultant familiar with the cross-border mechanics.

This guide walks through what triggers CSRD reporting for non-EU companies, the three pathways through which extraterritorial reporting actually happens, what changed under the Omnibus simplification package, and the practical steps a US, UK, or other non-EU parent should be taking now. If you're new to the directive itself, start with what is the CSRD and the ESRS standards explained overview.

Why the CSRD Applies Beyond the EU at All

The CSRD is a European law, but sustainability and supply chains are not. EU legislators wanted to avoid a regime where European subsidiaries of global groups reported less than their EU-headquartered competitors, and where investors and stakeholders had no comparable view of a multinational's group-wide sustainability profile.

The directive therefore reaches non-EU groups through three deliberate mechanisms:

1. Large EU subsidiaries that meet the standalone CSRD thresholds report on themselves
2. EU-listed subsidiaries, including SMEs on regulated markets, eventually report on themselves
3. The non-EU parent group itself must publish a consolidated CSRD-compliant report once it generates significant turnover in the EU — the third-country undertaking regime under Article 40a of the Accounting Directive

The third mechanism is the one most US and UK groups underestimate. It is not satisfied by your home-country sustainability report and it cannot be quietly delegated to your smallest EU entity without serious preparation.

Who Counts as a "Non-EU Company" Under the CSRD

For CSRD purposes, the test is where the ultimate parent of the consolidated group is incorporated. A non-EU parent group is one whose top-level consolidating entity is incorporated outside the European Economic Area, regardless of where it is listed, where its largest revenue base is, or where its CEO sits.

A US Delaware-incorporated parent with major EU manufacturing operations is a non-EU group. A Cayman Islands-incorporated holding company of a Chinese operating business is a non-EU group. A UK PLC is a non-EU group (the UK left the EU and is therefore a third country for CSRD purposes, even though many UK sustainability disclosures look superficially similar). A Swiss AG is a non-EU group. So is a Japanese kabushiki kaisha.

If you are unsure whether your group structure makes you a non-EU reporter, this is one of the first questions a qualified CSRD consultant should help you answer — because the answer determines which pathway and which standard applies.

The Three Pathways Non-EU Groups End Up Inside CSRD

Most non-EU groups end up reporting under the CSRD through one of three pathways. They are not mutually exclusive — many groups will face two of them simultaneously and have to choose how to consolidate the reporting.

Pathway 1 — Large EU Subsidiary Report (Article 19a / 29a)

If your group has an EU subsidiary that meets the large undertaking thresholds — exceeding two of the three criteria (€50 million net turnover, €25 million balance sheet total, 250 employees) under the Omnibus-revised thresholds — that subsidiary is potentially in scope of the CSRD on its own.

In practice this means the EU subsidiary prepares a CSRD-compliant management report under the full ESRS, applying double materiality at the subsidiary level, going through limited assurance, and filing it locally. Even if your group already publishes a US 10-K sustainability section or a UK SECR disclosure, the EU subsidiary must publish its own ESRS-aligned statement.

There is an important exemption: a subsidiary can be released from individual reporting if it is included in the consolidated sustainability statement of a parent that itself publishes a CSRD-compliant or equivalent report. For non-EU groups this is the route through which Pathway 3 below becomes the dominant pathway — by reporting under Article 40a at the group level, the non-EU parent can release its EU subsidiaries from individual reporting.

Pathway 2 — EU-Listed Subsidiary (Wave 3)

If a subsidiary in your group has equity or debt securities listed on an EU regulated market — including listed small and medium-sized enterprises — that entity comes into CSRD scope on the listed-SME timetable (Wave 3), with proportionate standards available.

This pathway is narrower than Pathway 1 and most non-EU groups won't trigger it, but if you have an EU-listed financing vehicle or a separately listed European business unit, it is worth confirming explicitly.

Pathway 3 — Article 40a Third-Country Undertaking Report (Wave 4)

This is the headline regime for non-EU multinationals. It applies if both of the following are true:

• Your group generates more than €150 million in net turnover in the EU in each of the last two consecutive financial years
• Your group has at least one of: a large EU subsidiary, an EU-listed subsidiary, or an EU branch with more than €40 million in net turnover in the preceding financial year

If both conditions are met, the largest qualifying EU subsidiary or branch is required to publish a sustainability statement at the non-EU parent group level, covering the entire consolidated group's worldwide operations.

The first reporting year under Article 40a is financial year 2028, with the first report published in 2029. That timetable survived the Omnibus simplification package essentially unchanged — see the CSRD Omnibus changes for the full set of postponements that did apply elsewhere.

What an Article 40a Report Actually Looks Like

A common source of confusion is whether non-EU groups have to apply the full set of ESRS standards in the same way as an EU-headquartered reporter. The short answer is: not quite.

EFRAG has been developing a dedicated ESRS for third-country undertakings that mirrors the substance of the EU ESRS but adapts the scope and granularity to the realities of a non-EU parent reporting on a worldwide group. The adapted standard:

• Applies at the consolidated group level only — there is no requirement for each EU subsidiary to report separately if the group report is published
• Includes the same double materiality logic, but the assessment is performed on the global group's impacts, risks, and opportunities
• Requires the same core topical disclosures across ESRS E1–E5, S1–S4, and G1, with proportionality features that recognise non-EU groups will be assembling EU-aligned data for the first time
• Requires limited assurance from the start, on the same trajectory as EU reporters
• Must be made publicly available free of charge on the group's website, in addition to filing through the EU subsidiary or branch

A US or UK group preparing for Article 40a can lean on existing TCFD, ISSB, SEC climate, or CSDS disclosures as starting material, but should not assume one-to-one equivalence — see CSRD vs GRI, ISSB and TCFD for a side-by-side view of where the frameworks diverge. The double materiality requirement alone forces a workstream that most non-EU disclosure regimes do not yet contemplate.

How the Three Pathways Interact — And Which You Should Optimise For

A typical large US multinational group might simultaneously have:

• Three large EU subsidiaries (Germany, France, Netherlands) each in scope under Pathway 1
• One UK PLC subsidiary listed on the London Stock Exchange (not in scope for CSRD because of Brexit, but in scope for the UK's own emerging sustainability disclosure regime)
• Combined EU revenue of €1.2 billion, triggering Pathway 3 once the FY 2028 reference period applies

Without optimisation, this group would be on the hook for three separate CSRD-compliant EU subsidiary reports plus one Article 40a group report within a single reporting cycle. That is duplicative, expensive, and operationally painful.

The most common simplification is to publish the Article 40a group-level report on the parent's timetable and use the subsidiary exemption to release the EU subsidiaries from individual reporting. This requires:

• The group-level report to actually exist on the relevant timetable
• The report to be CSRD-equivalent in scope and assurance
• Each EU subsidiary to file the appropriate notice to its local commercial register stating that it is exempted and identifying the parent's report

Getting this right is mostly a matter of timing. If you wait until 2029 to start preparing the Article 40a report, your EU subsidiaries will already have been forced into Pathway 1 for FY 2027 and FY 2028. Starting now — with a clear roadmap to a 2029-published group report — keeps you on the simpler trajectory. This is exactly the kind of multi-entity sequencing where a CSRD implementation roadmap earns its keep.

Where US, UK, Swiss, and Other Non-EU Groups Most Often Get Caught Out

We see the same pattern of misunderstandings repeatedly among non-EU groups starting their CSRD readiness work. If you recognise any of these in your own organisation, treat them as a flag to investigate further.

1. "We already report under ISSB / SEC / TCFD / SECR, so we're covered." None of these frameworks satisfy the double materiality requirement on their own. They cover financial materiality (the outside-in view) but not impact materiality (the inside-out view). You will need to do the impact assessment from scratch.
2. "Our smallest EU entity has the lowest revenue, so it's easier to designate it as the reporting entity." Article 40a designates the largest qualifying subsidiary or branch as the filer. You don't get to choose the entity that is easiest internally.
3. "We have an EU branch but no EU subsidiary, so we're outside scope." An EU branch with more than €40 million in turnover triggers Article 40a once the group revenue test is also met. Branches are explicitly captured.
4. "€150 million is huge — we're nowhere near that." Test it on each of the last two financial years on EU-only net turnover, not global revenue. The threshold is lower than it sounds for groups with meaningful EU distribution or manufacturing footprints.
5. "Our consolidated sustainability report uses GRI, so the EU subsidiaries are exempt." A GRI report is not automatically CSRD-equivalent. The subsidiary exemption requires the parent's report to be prepared under either the CSRD itself or a Commission-approved equivalent standard.
6. "We can start preparing in 2028." A credible Article 40a report requires roughly 18–24 months of preparation: scoping, materiality, data collection, controls, internal review, and limited assurance. Starting in 2028 to publish in 2029 is tight even for groups that have meaningful sustainability data infrastructure already.
7. "Our EU subsidiaries don't have the data." The Article 40a report consolidates the worldwide group, not just the EU footprint. The data lift is global — Scope 1, 2, and material Scope 3 emissions, workforce metrics for the entire group, biodiversity exposure at material sites worldwide, and so on.

A Realistic Preparation Timeline for a Non-EU Group

For a non-EU group expecting to fall under Article 40a for FY 2028, here is what a sensible preparation programme looks like working backward from a Q2 2029 publication date.

Window	Activity
Now – Q4 2026	Scoping and applicability confirmation. Confirm Article 40a applies, identify the largest qualifying EU subsidiary or branch as the future filer, decide on the subsidiary exemption strategy for any in-scope EU subsidiaries, run an initial data gap analysis.
2027	Double materiality assessment at the global group level. This is the largest single workstream and the one most non-EU groups underestimate. See the double materiality guide for the methodology.
2027 – H1 2028	Build the data infrastructure for the material topics. Establish controls, ownership, and evidence trails for assurance. Pilot the disclosures against the most recent available reference period.
H1 2028	Internal dry-run report on FY 2027 data. Use this to surface auditor and disclosure issues a year before they matter.
Throughout FY 2028	Live data collection for the reporting period.
Q1 – Q2 2029	Drafting, internal review, limited assurance, and publication of the Article 40a report.

Compressing this timeline is possible but expensive — typically through a larger consultant team operating in parallel rather than sequentially. The most efficient option is to start earlier, with a smaller team, and avoid the surge pricing.

What This Means for Hiring CSRD Help

The skill set required to support a non-EU group through Article 40a is specifically different from the skill set required to support a German or French Wave 1 reporter. The cross-border issues that matter most include:

• Group structure and consolidation expertise — understanding how a US, UK, or Swiss consolidated group maps onto the Article 40a filer concept
• Equivalence judgement — assessing how your existing ISSB, SEC, TCFD, SECR, or other disclosures map onto the ESRS and where the genuine gaps are
• Cross-jurisdictional data infrastructure — pulling worldwide HR, environmental, and value chain data into an EU-aligned reporting structure
• Auditor and assurance navigation — working with the assurance provider that will sign the limited assurance opinion on the EU-filed report, which may not be your group's home audit firm
• EU subsidiary release mechanics — drafting the local exemption notices and ensuring they are filed correctly in each EU member state where you have an in-scope subsidiary

These are senior, specialised capabilities. They are not where you want to apply the lowest-cost generalist on the panel. If you are evaluating proposals from firms or independents, the CSRD consultant RFP template walks through how to structure the engagement and the questions that surface real cross-border experience. The CSRD consultant costs guide gives you a benchmark for what a multi-jurisdictional Article 40a programme should cost — typically materially higher than a single-entity Wave 1 engagement.

Find a CSRD Consultant Who Has Worked With Non-EU Groups

Most consultants and Big 4 sustainability practices market themselves as CSRD experts. Far fewer have actually run an Article 40a programme for a US, UK, Swiss, or Japanese parent group — because Wave 4 first reports won't appear until 2029. The genuine expertise sits with a smaller group of practitioners who have either worked inside multinational sustainability teams, advised on cross-border NFRD or CSRD subsidiary reporting, or led group-level double materiality assessments at non-EU multinationals.

The CSRD Experts directory lets you filter consultants by expertise and geography to find practitioners who have specifically worked on cross-border CSRD programmes — not just generalists with a single Wave 1 engagement to point to. Whether you're a US group beginning your Article 40a scoping or a UK group untangling subsidiary reporting under the post-Brexit framework, the directory is the fastest way to build a shortlist of senior practitioners who have already done the work.