Materiality · the concept
Double materiality: two questions, and why the UK asks only one
Double materiality means reporting a sustainability matter if it matters from either of two directions: what the company does to people and the environment, and what the matter does to the company.
The EU writes both into law in Article 19a(1) of the Accounting Directive; the UK’s UK SRS S1 asks only the second.
This page defines each limb at the provision, shows how they interact, and places GRI and the ISSB against them; the method is on the double materiality assessment.
Definition
What double materiality is, in the law
Double materiality is not an accounting convention that the EU adopted; it is the shape of the reporting duty itself.
The Accounting Directive asks for two kinds of information, and a company in scope must give both.
Recital 29 of the CSRD gives the pairing its name: “That is referred to as the double materiality perspective”, and says each perspective is to be considered in its own right.
Revised ESRS 1 puts it into the standards at ¶2: reporting under the two perspectives “constitutes the double materiality principle”.
The principle survived the 2026 revision untouched; what changed is the method for applying it.
The 2023 text, still usable for financial year 2026, is Delegated Regulation (EU) 2023/2772.
Article 19a(1), both limbs
“…information necessary to understand the undertaking’s impacts on sustainability matters, and information necessary to understand how sustainability matters affect the undertaking’s development, performance and position.”
Directive 2013/34/EU, consolidated 18 March 2026.
Article 29a(1) is the group equivalent.
The two limbs
Impact materiality and financial materiality, side by side
| Impact materiality | Financial materiality | |
|---|---|---|
| Direction | Inside-out: the company’s effect on people and the environment | Outside-in: the effect on the company |
| Test (revised ESRS 1) | Material actual or potential, positive or negative impacts, over short, medium or long term (¶39) | Risks or opportunities that trigger, or could reasonably be expected to trigger, material financial effects (¶47) |
| How it is judged | Negative impacts by severity — scale, scope, irremediable character — plus likelihood if potential (¶40) | Likelihood and potential magnitude of the financial effects (¶50) |
| Positive impacts | Scale and scope, plus likelihood if potential; never netted against negatives (¶41, ¶44) | — |
| Where it reaches | Own operations and the upstream and downstream value chain, through products, services and business relationships | Includes risks and opportunities from the value chain |
| Written for | Other users too: business partners, trade unions, civil society (¶4(b)) | Primary users: investors, lenders, other creditors (¶4(a)) |
The two limbs ask opposite questions about the same topic, and they often give different answers.
ESRS 1 gives its own examples of an impact the company is connected to: cobalt in a product that was mined with child labour upstream, and a loan to a business that contaminates water and land in breach of agreed standards (AR 18).
Neither may cost the reporting company anything this year, and both are reportable under the impact limb.
A carbon price on the horizon runs the other way: it can be highly material financially for a company whose own emissions are modest.
Any one of scale, scope or irremediable character can make a negative impact severe on its own (AR 22).
For a potential human-rights impact, severity takes precedence over likelihood (¶40).
The connection
How the two limbs feed each other
ESRS does not treat the two limbs as separate exercises that happen to share a report.
Revised ESRS 1 ¶35 says the company “shall consider how they interact”: an impact can be financially material from the start, or become so later.
It also says impacts can be material from an impact perspective alone, whether or not they are financially material.
Paragraph 36 sets the usual order: start with impacts, then look for risks and opportunities that do not arise from them, such as physical climate risk.
This is the link a single-materiality reporter sees only at the end of the chain, once an impact has turned into a financial effect.
From the material impacts found in the impact assessment.
From dependencies on natural, human and social resources.
From other factors, such as exposure to climate hazards or regulatory change.
The UK
Why UK SRS uses financial materiality only
UK SRS S1 and S2 are the ISSB’s IFRS S1 and S2, endorsed for the UK with a short list of amendments, and none of those amendments adds an impact limb.
UK SRS S1 ¶18 makes information material if omitting, misstating or obscuring it could reasonably be expected to influence the decisions of primary users of general purpose financial reports.
Paragraph 3 ties the whole standard to risks and opportunities that could affect the entity’s cash flows, its access to finance or its cost of capital.
That is single materiality, and the phrase “enterprise value” that often attaches to it appears nowhere in UK SRS S1.
The government explained its choices in its consultation response, and the ISSB’s own materiality education material explains the test the UK inherited.
The practical consequence: a UK-listed company reporting against UK SRS does not report an impact because it is severe, only because it creates a risk or opportunity for the company.
The UK judgement in detail is on UK SRS S1 materiality, the standards on UK SRS S1 and UK SRS S2, and climate specifics in UK SRS S2.
| UK SRS S1 | ESRS | |
|---|---|---|
| Users served | Primary users of general purpose financial reports | Primary users and other users |
| What is material | What could influence those users’ decisions (¶18) | What is material from the impact or the financial perspective |
| Reference point | Cash flows, access to finance or cost of capital (¶3) | The same, plus impacts on people and the environment |
| Threshold | None set (¶B19) | Qualitative considerations and quantitative thresholds (¶37) |
GRI and the ISSB
Where GRI and the ISSB sit against double materiality
GRI is the impact half, not the whole: GRI 1 §2.2 asks an organisation to report its most significant impacts on the economy, environment and people.
GRI’s own guidance on double materiality says “The European Union dubbed this concept ‘Double Materiality’”, and describes its standards as representing the impact side.
The ISSB is the financial half: the GRI and IFRS Foundation joint statement of 26 May 2026 says ISSB Standards require information about impacts only as far as it bears on the entity’s own risks and opportunities.
EFRAG’s IG 1 joins them up: a GRI assessment is “a good basis” for the impact assessment, and a company applying ESRS is expected to be able to identify the risks and opportunities the ISSB standards ask about.
The interoperability guidance goes a step further on definitions: the ESRS financial-materiality definition is aligned with the IFRS S1 definition of materiality.
The wider family of frameworks is set out on IFRS S1 and S2.
| Framework | Materiality | In its own words |
|---|---|---|
| GRI | Impact | The organisation’s “most significant impacts on the economy, environment, and people” (GRI 1 §2.2) |
| ISSB / UK SRS | Financial | Impacts only “in so far as this provides material information for investors with respect to sustainability-related risks and opportunities for the entity” |
| ESRS | Double | Impact, financial, or both (ESRS 1 ¶2) |
Who needs it
Where double materiality reaches a UK business
No UK regime requires a double materiality assessment.
A UK business meets the requirement through the EU: an EU subsidiary in CSRD scope runs one, and a UK subsidiary feeds its EU parent’s.
A UK group reported on under Article 40a reports impacts only, because the directive excludes risks, opportunities, resilience and dependencies from those reports (ESRS-40a BC15).
The routes are set out on CSRD for UK companies, and the UK obligations around them on ESG reporting requirements in the UK and ESOS and UK SRS.
Which UK regimes apply to a given company can be checked with the UK SRS compliance calculator.
A company weighing whether to run a double materiality assessment voluntarily can book a free 15-minute call to talk it through.
| UK position | Materiality basis |
|---|---|
| UK-listed, reporting against UK SRS | Financial only |
| EU subsidiary in CSRD scope | Double |
| UK subsidiary of an EU reporter | Double, through the parent’s assessment |
| UK group reported on under Article 40a | Impact only |
| GRI reporter | Impact |
Next
From concept to assessment
Revised ESRS 1 decides what is reported in two steps: identify the topics tied to material impacts, risks or opportunities, then decide the information for each.
It now allows a top-down route, reasoning from strategy, business model, sector and geography, beside the bottom-up route of assessing each impact, risk and opportunity.
And it prohibits disclosing information a datapoint prescribes if that information is not material.
How to run the assessment, step by step, is on the double materiality assessment.
Frequently asked
Questions people ask
What is double materiality?
Double materiality is the EU rule that a company reports sustainability information from two perspectives: its impacts on people and the environment (impact materiality), and how sustainability matters affect its development, performance, position, cash flows, access to finance or cost of capital (financial materiality).
A matter is reported if it is material from either perspective or both.
It is written into Article 19a(1) of the EU Accounting Directive and applied through the European Sustainability Reporting Standards.
What is the difference between impact materiality and financial materiality?
Impact materiality looks outward: does the company have a material actual or potential, positive or negative impact on people or the environment, judged by severity and, for potential impacts, likelihood?
Financial materiality looks inward: could a sustainability matter trigger material financial effects on the company, judged by likelihood and the potential size of those effects?
Under ESRS a matter needs to pass only one test to be reported.
What is single materiality?
Single materiality is the financial-only approach used by the ISSB’s IFRS S1 and S2 and by UK SRS S1 and S2: information is material if it could reasonably be expected to influence the decisions of investors, lenders and other creditors.
The impact perspective is not a separate test, though a company’s impacts are reported where they give rise to risks or opportunities for the company.
Does UK SRS use double materiality?
No. UK SRS S1, published by the Department for Business and Trade on 25 February 2026, applies financial materiality only: information about sustainability-related risks and opportunities that could reasonably be expected to affect the entity’s cash flows, its access to finance or cost of capital.
No UK regime requires a double materiality assessment.
Does GRI use double materiality?
Not as such.
The GRI Standards ask an organisation to report its most significant impacts on the economy, environment and people, which is the impact half of double materiality.
GRI’s own guidance says the European Union dubbed the combined concept double materiality and that its standards represent the impact side.
EFRAG’s guidance says a GRI assessment is a good basis for the impact part of an ESRS assessment.
Is the ESRS definition of financial materiality the same as the ISSB’s?
The definition is aligned, according to the interoperability guidance published by EFRAG and the IFRS Foundation on 2 May 2024.
What differs is the regime around it: ESRS adds the impact perspective, so a matter can be material under ESRS without being financially material.
The guidance is not a formal statement of equivalence and was mapped to the 2023 ESRS.
Can an impact become financially material?
Yes.
Revised ESRS 1 says an impact can be financially material from the start or become so when it is reasonably expected to affect the company’s financial performance, position, cash flows, access to finance or cost of capital, and that impacts can be material from an impact perspective alone.
Do UK companies need a double materiality assessment?
Only where the EU regime reaches them: an EU subsidiary in scope of the CSRD runs one, and a UK subsidiary of an EU reporter supplies data for its parent’s.
Reports by non-EU groups under Article 40a cover impacts only, so there the financial limb falls away.
Some UK companies run one voluntarily, alongside the financial assessment UK SRS requires of listed companies that report against it.
Sources
Primary sources
Every figure, date and status on this page traces to the instrument’s owner.
Secondary commentary is never the source for a number.
- EUR-LexDirective 2013/34/EU, consolidated 18 March 2026 — Art 19a(1), Art 29a(1)
Both limbs in the operative text: impacts on sustainability matters, and how they affect the undertaking.
- EUR-LexDirective (EU) 2022/2464 (CSRD), recital 29
“That is referred to as the double materiality perspective.”
- EUR-LexCommission Delegated Regulation (EU) 2026/1563 — the revised ESRS
- EUR-LexCommission Delegated Regulation (EU) 2023/2772 — ESRS Set 1 (PDF)
The 2023 text, still usable for financial year 2026.
- EFRAGRevised ESRS 1 General requirements, Chapter 3 (¶2, ¶23, ¶35–50, AR 18–22)
The two dimensions defined, how they interact, severity, and the financial test.
- EFRAGIG 1 Materiality Assessment Implementation Guidance (final, May 2024)
Non-authoritative; key points 11 and 12 on GRI and the ISSB.
- EFRAGESRS-40a Exposure Draft, Basis for Conclusions (BC3, BC15)
Non-EU group reports cover impacts only.
- EFRAG and IFRS FoundationESRS–ISSB Standards Interoperability Guidance, Introduction and §1.1
The financial-materiality definition is aligned; the regimes are not.
- Department for Business and TradeUK SRS S1 — ¶3, ¶18, ¶B19
Primary users; cash flows, access to finance or cost of capital; no numerical threshold.
- Department for Business and TradeUK SRS S2 Climate-related disclosures
- Department for Business and TradeUK SRS S1 and S2, 25 February 2026
- Department for Business and TradeGovernment response to the consultation on UK SRS (web version)
- IFRS FoundationMateriality — educational material for IFRS S1 and S2
- GRIGRI 1: Foundation 2021, section 2.2
Reporting on the organisation’s “most significant impacts on the economy, environment, and people”.
- GRIDouble materiality: the guiding principle for sustainability reporting
“The European Union dubbed this concept ‘Double Materiality.’”
- GRI and IFRS FoundationFacilitating efficient reporting when using the GRI and ISSB Standards, 26 May 2026
The two purpose statements, side by side.
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