Single (financial) materiality
Could it reasonably be expected to affect the company’s cash flows, access to finance or cost of capital, so that investors and lenders would care?
UK SRS S1 ¶¶3, 18; IFRS S1.Materiality · the two lenses compared
Single vs double materiality: one lens or two
Single (financial) materiality asks how sustainability matters affect the company; double materiality asks that and also how the company affects people and the environment.
Under the ESRS a matter material on either lens is reported, while UK SRS and the ISSB standards apply the financial lens only.
The financial definitions are aligned, so a UK group that meets both can run one assessment and report from it twice.
The short answer
Single vs double materiality in two questions
Single materiality is the financial lens only: a sustainability matter is reported when information about it could reasonably be expected to influence the decisions of investors, lenders and other creditors.
Double materiality adds an impact lens, and under the ESRS a matter that passes either lens is reported.
Read the provisions behind each lens
UK SRS S1 ¶18: information is material “if omitting, misstating or obscuring that information could reasonably be expected to influence decisions that primary users of general purpose financial reports make on the basis of those reports”.
UK SRS S1 ¶3 frames the risks and opportunities in scope as those that “could reasonably be expected to affect the entity’s cash flows, its access to finance or cost of capital over the short, medium or long term.”
Article 19a(1) of the Accounting Directive requires information necessary to understand the undertaking’s impacts on sustainability matters, and information necessary to understand how sustainability matters affect the undertaking.
The revised ESRS 1 ¶35, in Delegated Regulation (EU) 2026/1563, adds: “Impacts can be material exclusively from an impact perspective, irrespective of whether they are financially material.”
The meaning of the word across accounts, audit and each framework is on materiality explained.
A sustainability matter
Double materiality
That question, plus: does the company have a material impact on people or the environment? Either answer is enough.
Art 19a(1); revised ESRS 1 ¶35.Words matter
“Single materiality” is a label, not a test any standard defines
Neither UK SRS S1 nor IFRS S1 uses the phrase “single materiality”; they define material information.
So the accurate form is to name the lens: single (financial) materiality, judged for primary users of general purpose financial reports.
Read the terminology in detail
“Double materiality” has an EU source: recital 29 of the CSRD calls the two limbs “the double materiality perspective” and asks undertakings to consider each perspective in its own right.
“Impact materiality” describes GRI’s test, although the GRI Standards themselves say “material topics” and “most significant impacts” rather than using that phrase.
“Dynamic materiality” describes an impact that becomes financially material over time; the revised ESRS provide for that in ¶35 and check it at each reporting date under ¶34, without naming a separate test.
“Enterprise-value materiality” is wrong for UK SRS: the phrase does not appear in UK SRS S1, and the ISSB removed “enterprise value” from its final standard, as the IFRS S1 Basis for Conclusions records at BC67.
Name the lensExplore
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Financial
What UK SRS S1 and IFRS S1 apply, as “material information” for primary users.
Side by side
Single vs double materiality, compared line by line
The comparison below sets UK SRS S1, the revised ESRS and GRI 3 against the same questions.
Paragraph numbers are the revised ESRS 1 and UK SRS S1.
| Single (financial): UK SRS S1 and IFRS S1 | Double: the ESRS | Impact: GRI 3 | |
|---|---|---|---|
| Question asked | How do sustainability matters affect the company? | That, and how does the company affect people and the environment? | How does the organisation affect the economy, environment and people? |
| Whose decisions | Primary users of general purpose financial reports (¶18) | Primary users and other users of the sustainability statement (ESRS 1 ¶23) | Stakeholders and other information users |
| Financial test | Cash flows, access to finance or cost of capital (¶3) | Development, financial position, performance, cash flows, access to finance or cost of capital (¶47) | None |
| Impact test | Only as a source of risks and opportunities | Severity, and likelihood for potential impacts (¶40) | Severity, and likelihood for potential impacts |
| Reporting rule | Material on the financial lens | Material on either lens (¶35) | Among the most significant impacts |
| Thresholds | None specified (¶B19) | Qualitative considerations and quantitative thresholds set by the undertaking (¶37) | Set and documented by the organisation |
| Status for a UK company | Comply or explain for listed companies from 2027; voluntary otherwise | Only where the CSRD reaches the group | Voluntary |
Where they meet
The financial definitions are aligned; the regimes are not
The joint ESRS–ISSB interoperability guidance says “the definition of financial materiality in ESRS is aligned with the definition of materiality in IFRS S1”.
The same guidance says ESRS materiality “covers also the impact materiality lens”, which is the whole difference between the regimes.
Read the alignment in detail
So the difference between single and double materiality is not that the EU asks a harder financial question; it is that the EU asks a second question.
The revised ESRS 1 ¶47 frames financial effects on development, financial position, financial performance, cash flows, access to finance or cost of capital, close to UK SRS S1 ¶3.
The guidance was published on 2 May 2024 and maps the 2023 ESRS paragraph numbers, so check any mapping against the revised standards before relying on it.
The ISSB’s Basis for Conclusions also says, at BC69, that materiality judgements for sustainability-related financial disclosures “will inevitably differ from those for financial statements”, which is why neither lens borrows audit percentages.
The ISSB’s educational material of November 2024 explains the financial lens step by step and adds no requirement.
Aligned, not identicalExplore
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Same definition
ESRS financial materiality is aligned with materiality in IFRS S1.
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Extra lens
ESRS materiality “covers also the impact materiality lens”.
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Wider scope
ESRS financial materiality is an expansion of financial-statement materiality (¶46).
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Not the accounts
Sustainability judgements “will inevitably differ” from financial-statement ones (BC69).
One set of matters, two lenses
The same matters under single and double materiality
The matters below are invented to show how the two lenses diverge, and describe no real company.
The illustrative company is an EU logistics subsidiary of a UK listed group, so its group meets both regimes.
Read the illustrative comparison
| Matter | Single (financial) materiality | Double materiality (ESRS) |
|---|---|---|
| Excessive hours among subcontracted drivers | Not material unless it threatens contracts, licences or financing | Material on impact alone, a potential human rights impact where severity takes precedence (¶40) |
| Flood risk to a depot | Material: a physical risk to cash flows | Material on the financial lens, though it is not an impact the company causes (¶36) |
| Diesel fleet emissions | Material as a transition risk, for example tender requirements | Material on both lenses |
| Office water use | Not material | Not material; “shall not” be reported (¶24) |
The single assessment reaches two of the three material matters; the double assessment reaches all three.
The method for scoring each matter is on the double materiality assessment, and the framework-neutral process on the materiality assessment guide.
How a chart can hide the difference is on the materiality matrix page.
Four illustrative mattersExplore
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Supplier working hours
Double: material on impact. Single: only if it becomes a financial risk.
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Flood risk to a site
Material under both: a physical risk with no impact score.
When one lens leads to the other
How an impact becomes financially material
The two lenses are connected: the revised ESRS 1 ¶35 says “An impact can be financially material from the start or become financially material”.
That movement is what people sometimes call dynamic materiality, which is a description, not a separate test.
Read how the standards provide for change over time
¶35 completes the sentence: an impact becomes financially material “when it is reasonably expected to affect the undertaking’s financial performance, financial position, cash flows, its access to finance or the cost of capital over the short, medium or long term.”
¶34 asks the undertaking, at each reporting date, to consider whether significant changes could affect its earlier conclusions and to update the assessment if they do.
UK SRS S1 ¶2 makes the same link from the other side: an entity’s dependencies on, and impacts on, resources and relationships give rise to its sustainability-related risks and opportunities.
So under single (financial) materiality an impact is reported when it reaches the company’s prospects, while under double materiality it can be reported before that.
UK SRS S1 ¶B28 likewise asks for materiality judgements to be reassessed at each reporting date.
Impact to financeExplore
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From the start
An impact can be financially material from the outset (¶35).
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Over time
Or it can become financially material when it is reasonably expected to affect the company’s finances (¶35).
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Checked each year
Significant changes are considered at each reporting date (¶34).
Who applies which
Which companies use single and which use double materiality
In the UK, the FCA’s PS26/19 asks listed companies in the UKLR 6, 14, 15, 16 and 22 categories to report against UK SRS on a comply-or-explain basis for periods beginning on or after 1 January 2027.
That is single (financial) materiality, with an explanation route rather than an unconditional duty.
Read the scope of each regime
From financial years beginning on or after 1 January 2027 the CSRD reaches undertakings that exceed both 1,000 employees and €450 million of net turnover, under the consolidated Accounting Directive, and they apply the ESRS on double materiality.
Undertakings that reported in the first wave for financial years 2024 to 2026 fall outside the CSRD from 2027 unless they also meet that test.
Non-EU groups with large EU activity are reached separately from financial year 2028, and EFRAG’s draft standard for them, ESRS-40a, covers impacts only, with consultation open to 31 October 2026 as at 11 October 2026; see the ESRS-40a page.
What comply or explain asks of a UK listed company is on UK SRS compliance, and the standards themselves on UK SRS S1 and S2.
When the EU regime reaches a UK group is on the CSRD and UK SRS comparison.
Who applies which lensExplore
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CSRD groups
ESRS double materiality, above 1,000 employees and €450m from FY2027.
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Non-EU groups
The draft ESRS-40a looks at impacts only.
The third lens
GRI is neither: it applies impact materiality
GRI 3 defines material topics as those representing the organisation’s most significant impacts on the economy, environment and people, including impacts on their human rights.
It says “The significance of an impact is the sole criterion to determine whether a topic is material for reporting.”
Read how GRI describes its own place
GRI’s own guide to double materiality says “The European Union dubbed this concept ‘Double Materiality.’”
It also says GRI supports the concept and that “its standards represents the impact side of double materiality”.
So the three regimes sit on a spectrum: financial (ISSB and UK SRS), double (ESRS) and impact (GRI).
The ESRS and GRI share the same severity characteristics, scale, scope and irremediable character, with likelihood for potential impacts.
The GRI Standards guide covers the wider system, and impact materiality the impact lens in depth.
GRI’s positionExplore
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Material topics
The organisation’s most significant impacts on the economy, environment and people.
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Sole criterion
Significance of the impact decides; financial effect does not.
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The EU’s name
GRI says the European Union dubbed the concept double materiality.
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The impact side
GRI says its standards represent the impact side of double materiality.
How the two lenses developed
From two limbs in 2014 to two regimes in 2026
The two lenses grew up in different places: the EU wrote both limbs into law, while the ISSB built its standards on the financial lens.
Dates are as at 11 October 2026.
- 201401
NFRD writes both limbs
Directive 2014/95/EU inserts the impact and effect limbs into the Accounting Directive. - 202202
- June 202303
IFRS S1 issued
The ISSB applies the financial lens and removes “enterprise value” from its objective and materiality wording. - 31 July 202304
First ESRS adopted
Delegated Regulation (EU) 2023/2772 makes double materiality the basis of ESRS reporting. - 2 May 202405
Interoperability guidance
The financial definitions are described as aligned; the regimes stay distinct. - 25 February 202606
- 21 September 202607
Revised ESRS published
Delegated Regulation (EU) 2026/1563 keeps double materiality; ¶35 says either lens is enough.
UK groups with EU reach
If your group meets both: one assessment, two reports
EFRAG’s IG 1 says the assessment “shall reflect both the impact and financial materiality perspectives … but need not perform two separate and independent processes”.
So a UK group with an ESRS reporter can run one assessment and take its financially material subset as the starting point for UK SRS S1.
Read how to run both from one evidence base
IG 1 is non-authoritative and written for the 2023 ESRS, so use it for method and cite the revised ESRS 1 for paragraph numbers.
The impact-only findings stay on the EU side, unless and until they would affect the group’s cash flows, access to finance or cost of capital.
Thresholds differ in kind: the ESRS ask for qualitative considerations and quantitative thresholds set by the undertaking (¶37), and UK SRS S1 sets none (¶B19).
Both regimes ask for the judgement to be revisited: ¶34 of the revised ESRS 1 at each reporting date, and UK SRS S1 ¶B28 at each reporting date.
The two frameworks are compared clause by clause on UK SRS and the ESRS and the ESRS read against UK SRS.
- 1
Map the regimes
Which entities report under the ESRS, and whether the parent reports under UK SRS.
- 2
Run one assessment
Both perspectives, without two separate processes (IG 1 ¶65).
- 3
Take the financial subset
The aligned financial definition carries to UK SRS S1.
- 4
Keep impact-only matters on the EU side
They enter UK SRS only if they affect cash flows, finance or cost of capital.
A UK group’s decision path
Deciding which lens applies, in order
This sequence is an illustration of how a UK group might work through the question, not a procedure any regulator sets.
Each step names the instrument that answers it.
- 01 / UK listing01
Is the parent in a covered listing category?
If so, UK SRS applies on a comply-or-explain basis from periods beginning 1 January 2027. - 02 / EU reach02
Does any EU entity pass the CSRD test?
Both 1,000 employees and €450 million of net turnover, from financial year 2027. - 03 / Requests03
Who else is asking?
An EU customer, parent or lender may request ESRS data; the value-chain cap may let a small supplier decline. - 04 / Method04
One assessment, both perspectives
Where the ESRS apply, run the double assessment and reuse its financial subset. - 05 / Report05
Report each lens in its own place
ESRS 2 IRO-1 and IRO-2 for the EU entity; UK SRS S1 for the group.
What goes wrong
Six mistakes about single and double materiality
Most errors about the two lenses come from collapsing them into one another.
These six are the ones the standards themselves rule out.
Read each mistake with its correction
“A matter must be material both ways.”
Either is enough under the ESRS (¶35).
“UK SRS uses enterprise-value materiality.”
The phrase appears nowhere in UK SRS S1; the ISSB removed it from its final standard (BC67).
“The ESRS and ISSB define financial materiality differently.”
The joint guidance says the definitions are aligned.
“Single materiality is half a double assessment.”
It is one lens, complete in itself, with none of the impact work.
“Dynamic materiality is a third test.”
It describes change over time; the mechanism is ESRS 1 ¶¶34–35.
“GRI is double materiality.”
GRI applies impact materiality and attributes the double name to the EU.
If you have been asked for double materiality
A UK company runs a double materiality assessment because an EU parent, customer or lender asked, or because an EU entity in its group is in scope — never because UK law requires it.
Start from double materiality for the concept and financial materiality for the lens the two regimes share.
Common errorsExplore
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Half an assessment
Single materiality is one complete lens, not half of double.
Frequently asked
Questions people ask
What is the difference between single and double materiality?
Single materiality asks one question: could a sustainability matter affect the company’s prospects in a way the people who finance it would care about?
Double materiality asks that and a second question: does the company have a material impact on people or the environment?
Under the ESRS a matter material on either question is reported.
What is single materiality?
A descriptive label for the investor-facing test used by the ISSB standards and UK SRS.
UK SRS S1 ¶18 says information is material if omitting, misstating or obscuring it could reasonably be expected to influence decisions that primary users of general purpose financial reports make.
The standards themselves say “material information”, not “single materiality”.
Is “single materiality” a defined term?
No. Neither UK SRS S1 nor IFRS S1 uses the phrase.
It is shorthand for the financial lens, so the safe practice is to name the lens: single (financial) materiality, judged for primary users of general purpose financial reports.
What is the difference between financial and impact materiality?
Financial materiality looks outside-in: how sustainability matters affect the company’s development, financial position, performance, cash flows, access to finance or cost of capital.
Impact materiality looks inside-out: the company’s actual and potential impacts on people and the environment, assessed on severity and, for potential impacts, likelihood.
Does UK SRS use double materiality?
No. UK SRS S1 applies single (financial) materiality, like the IFRS S1 standard it is based on.
Impacts enter only as sources of risks and opportunities that could affect cash flows, access to finance or cost of capital.
Is UK SRS “enterprise-value materiality”?
No. The phrase does not appear in UK SRS S1.
The ISSB removed the definition of enterprise value and the words “to assess enterprise value” from the final IFRS S1, as its Basis for Conclusions explains at BC67, and aligned materiality with the IASB’s definition.
Are the ESRS and ISSB financial materiality tests the same?
The definitions are aligned.
The joint ESRS–ISSB interoperability guidance says the definition of financial materiality in ESRS is aligned with the definition of materiality in IFRS S1.
The regimes still differ, because ESRS materiality “covers also the impact materiality lens”.
Must a matter be material on both lenses under the ESRS?
No. Revised ESRS 1 ¶35 says impacts can be material exclusively from an impact perspective, irrespective of whether they are financially material.
Either lens alone is enough.
Which UK companies apply single materiality?
Listed companies in the UKLR 6, 14, 15, 16 and 22 categories report against UK SRS on a comply-or-explain basis for periods beginning on or after 1 January 2027, under the FCA’s PS26/19.
Other companies may use UK SRS voluntarily.
When does a UK company meet double materiality?
When the CSRD reaches its group: through an EU subsidiary or EU group that exceeds both 1,000 employees and €450 million of net turnover from financial year 2027, through an EU listing, or later through Article 40a.
Or when an EU customer, parent or lender asks.
Is GRI single or double materiality?
Neither, strictly: GRI applies impact materiality.
GRI 3 defines material topics as the organisation’s most significant impacts on the economy, environment and people, and GRI’s own guide says its standards represent the impact side of double materiality.
What is dynamic materiality?
A descriptive term for a matter whose materiality changes over time, typically an impact that becomes financially material.
It is not a test defined in the ESRS, IFRS S1 or GRI.
In the revised ESRS the mechanism is ¶35, which says an impact can be financially material from the start or become so, and ¶34, which asks for significant changes to be considered at each reporting date.
Can one assessment serve both single and double materiality?
Yes.
EFRAG’s IG 1 says an assessment should reflect both perspectives “but need not perform two separate and independent processes”.
The financially material subset of an ESRS assessment is the natural starting point for UK SRS, and the impact-only findings stay on the EU side.
Does double materiality always produce more topics?
Usually, but not by rule.
It adds every matter that is material on impact alone, so it rarely produces fewer; but a well-run single assessment can still surface the same climate and workforce topics, because impacts often become financial risks.
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.
Checked against 15 sources fromDepartment for Business and TradeIFRS FoundationIFRS Foundation / EFRAGEUR-LexEFRAGGlobal Reporting Initiative
- Department for Business and TradeUK SRS S1 General Requirements — ¶¶3, 17, 18, B19
Single (financial) materiality: information that could reasonably be expected to influence primary users’ decisions.
- Department for Business and TradeUK Sustainability Reporting Standards S1 and S2, published 25 February 2026
The UK’s endorsement of the ISSB baseline.
- IFRS FoundationIFRS S1 Basis for Conclusions — BC34(b), BC39, BC67, BC69
Why “enterprise value” was removed, and why sustainability judgements differ from financial-statement ones.
- IFRS FoundationSustainability-related risks and opportunities and the disclosure of material information — educational material, November 2024
Explains material information; not part of the Standards.
- IFRS Foundation / EFRAGESRS–ISSB Standards Interoperability Guidance, 2 May 2024 — Introduction and §1.1
The financial-materiality definitions are aligned; the ESRS add the impact lens.
- EUR-LexDirective 2013/34/EU, consolidated 18 March 2026 — Art 19a(1)
The two limbs of EU sustainability reporting, and the scope test from FY2027.
- EUR-LexDirective (EU) 2022/2464 (CSRD) — recital 29
Where the EU names “the double materiality perspective”.
- EUR-LexDirective 2014/95/EU (Non-Financial Reporting Directive)
Wrote both limbs into the Accounting Directive in 2014.
- EUR-LexCommission Delegated Regulation (EU) 2026/1563 — revised ESRS 1, ¶¶23, 34–36, 45–47
Either lens is enough; the financial limb; periodicity.
- EUR-LexCommission Delegated Regulation (EU) 2023/2772 — the first ESRS
Adopted 31 July 2023.
- EFRAGIG 1: Materiality Assessment Implementation Guidance, ¶65 (May 2024)
One assessment for both perspectives; non-authoritative, written for the 2023 ESRS.
- Global Reporting InitiativeGRI 3: Material Topics 2021
Impact only: the organisation’s most significant impacts on the economy, environment and people.
- Global Reporting InitiativeDouble materiality: the guiding principle for sustainability reporting
GRI’s own account: its standards represent the impact side.
- Financial Conduct AuthorityPS26/19 — UK SRS on a comply-or-explain basis
Listed companies, periods beginning on or after 1 January 2027.
- EFRAGESRS-40a Exposure Draft — Basis for Conclusions
The draft standard for non-EU groups covers impacts only.
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