Membership organisations · each duty, tested
Sustainability reporting for membership organisations: three doors, few duties
Sustainability reporting for membership organisations rarely starts with a statute written for them: professional bodies, trade associations, membership charities and private members’ clubs sit outside the FCA’s listing rules unless they have listed securities.
Duties reach them through narrower doors — the Charities SORP 2026 for larger charities, SECR for a large company, and a Carbon Reduction Plan when bidding for big government contracts.
Everything else arrives as a request from members, sponsors and buyers, or as part of what the organisation sells.
UK SRS
Does UK SRS apply to a membership body?
The search that brings most readers here is some form of “UK SRS legislation” or “UK SRS compliance”, and the answer for a membership organisation is short.
The Department for Business and Trade published UK SRS S1 and S2 on 25 February 2026, and its UK SRS guidance says they are available for voluntary use by any entity that chooses to do so.
The one reporting duty made so far is the FCA’s: under PS26/19 ¶¶3.6 and 3.12, companies with securities in UKLR 6, 14, 15, 16 or 22 report against the standards or explain, for accounting periods beginning on or after 1 January 2027.
A professional body, a trade association, a membership charity or a members’ club is almost never in one of those categories, so the honest answer is that UK SRS does not apply to it.
There is no size test that could bring it in: the UK SRS thresholds page explains why the standards carry none, and the page on who is in scope works through the categories one by one.
What matters is that many of an association’s members may be in scope, which is the first door below.
Not size, sector or charitable status.
Only whether the organisation has securities in one of five UK Listing Rules categories.
Source: FCA PS26/19 ¶3.6
Charities SORP 2026
Membership charities: the tier decides
The Charities SORP 2026 added a sustainability section to the trustees’ annual report.
Whether it is a requirement or an option depends on income.
| Tier | Gross income | Sustainability in the trustees’ report | Paragraph |
|---|---|---|---|
| Tier 1 | Accruals accounts, not more than £500,000 | May explain how the charity responds to and manages environmental, governance and social matters | ¶1.60 |
| Tier 2 | Not more than £15 million | May explain, as tier 1 | ¶1.60 |
| Tier 3 | Above £15 million | Must provide a summary of how the charity is responding to and managing those matters | ¶1.61 |
What the SORP suggests
¶1.62 says the report could give the key performance indicators used to assess progress against targets for managing climate-related risks.
¶1.10 gives the reason: stakeholders increasingly want to understand how charities are responding to environmental matters.
Charitable companies
¶1.65 reminds charitable companies inside the Large and Medium-sized Companies Regulations 2008 that they must give the energy and carbon disclosures those Regulations require.
Some may also fall within the non-financial and sustainability statement in s.414CB.
The SORP is published by the joint SORP-making body: the Charity Commission for England and Wales, the Charity Commission for Northern Ireland and the Office of the Scottish Charity Regulator.
Companies limited by guarantee
Most associations are companies, and the size tests apply
Many trade associations and professional bodies are companies limited by guarantee, and a company limited by guarantee is still a company formed and registered under the Companies Act 2006.
ISEP is an example: Companies House records it as a private limited company by guarantee, company 03690916, which changed its name from the Institute of Environmental Management and Assessment on 8 January 2025.
So the Streamlined Energy and Carbon Reporting test in Schedule 7 paragraph 20B applies as it would to any unquoted company: it is exempt if it meets two or more of the “not more than” conditions.
A body with 250 or fewer staff and turnover of £36 million or less meets two, so it is outside SECR; a large one that does not gives energy use, Scope 1 and 2 emissions, an intensity ratio and its efficiency actions in the directors’ report.
The climate-related financial disclosures in section 414CA reach very few: every limb requires more than 500 employees.
A members’ club run as a company is in exactly the same position, whatever it says about sustainability in its marketing.
| SECR ¶20B(2) condition | Wording |
|---|---|
| Turnover | Not more than £36 million |
| Balance sheet total | Not more than £18 million |
| Employees | Not more than 250 |
Check your organisation
Which doors are open for you?
The tool runs the tests above on one year’s figures.
Tick what is true of your organisation: whether it is a charity and its gross income, whether it is a company and its size, whether it bids for large government contracts, and whether members ask for emissions data.
Each answer names the paragraph it comes from, so a trustee or finance lead can check it against the instrument.
It does not apply group rules, the two-year rule for changes in SECR status, or charity-law exemptions; the regime’s own page does.
Door check · which duties reach you
Trustees may choose to explain how the charity is responding to and managing environmental, governance and social matters. It is an option, not a requirement.
Provision: Charities SORP 2026 ¶1.60
Exempt on these figures: the company meets 3 of the three “not more than” conditions, and two are enough.
(After the first year, status changes only when the new position holds for two consecutive years.)
Provision: SI 2008/410 Sch 7 ¶20B(1)–(2)
SORP ¶1.65 reminds charitable companies inside the 2008 Regulations to give the SECR disclosures, and that some may also fall within s.414CB.
Provision: Charities SORP 2026 ¶1.65
No duty: the FCA’s rules reach only companies with securities in five listing categories.
Any organisation may use the standards voluntarily.
Provision: FCA PS26/19 ¶3.6; DBT UK SRS guidance
A corporate member or sponsor asking for your emissions is gathering its own Scope 3 data.
No statute requires you to answer, but a large partner may make it a contract term.
Provision: GHG Protocol Scope 3 Standard (the partner’s method, not your duty)
One year’s figures, checked against each test as written.
Group rules, quoted status and charity-law exemptions are on each regime’s page.
Nothing you enter is stored or sent.
Door one
Through the members: explaining their rules
A trade association whose members are listed or large companies represents organisations that do have to report.
Those members want briefings, templates and a collective voice on consultations, and the association has to know which of them are caught, by which regime, and from when.
For listed members that is the FCA’s comply-or-explain basis from 1 January 2027; for large unquoted members it is SECR and possibly ESOS; for any member it may be a sector rule such as the ones on UK sustainability reporting by sector.
Translating those rules into “what you must do by when” is one of the most useful things an association can publish, and membership marketers make the same point about content marketing for trade associations: regulation explained is what makes a subscription easy to justify.
Investor associations face the same work for their own members, who may be signatories to the UK Stewardship Code 2026 as well as subject to the listing rules.
Door two
Through buyers and partners: requests, not statutes
Membership organisations sell too: sponsorship, corporate membership, training, conferences and events.
Large corporate partners increasingly ask their suppliers for emissions data, because the GHG Protocol Scope 3 Standard asks them to account for their value chain.
That request is a commercial one: no statute obliges an association to answer it, though a partner can make it a term of a contract.
Public-sector buyers are different only in degree: where an in-scope central government authority applies PPN 006 to a contract above £5 million a year including VAT, averaged over its life, a carbon reduction plan is a condition of taking part.
The plan covers Scope 1 and 2 and five Scope 3 categories, not the whole of Scope 3.
Selling to organisations is its own discipline, covered in go-to-market for membership organisations.
Event organisers in particular are asked for Scope 3 emissions data, since attendee travel and venues sit in their corporate clients’ inventories.
Door three
Through the proposition: when sustainability is the product
Some organisations make sustainability the thing they sell.
The Conduit describes itself as a purpose-driven community committed to creating a just and sustainable future, with a private members’ club in Covent Garden.
On its impact page it says the club operates sustainably, using 100% renewable electricity, sustainable supply chains and waste minimisation.
For a club like that, measured reporting on its own footprint is part of the product, and members who work in sustainability will read it closely; there is a worked example of a sustainability members’ club on a sister site.
Any such claim is marketing, so it has to be one the organisation can evidence, for the reasons set out in sustainability in go-to-market.
Membership bodies
Sustainability membership bodies, in their own words
Readers searching “sustainability memberships” are often looking for a body to join.
Each is described from its own published material, in alphabetical order; this page does not rank them.
| Body | What it says it is | What membership involves, on its own pages | What it is not |
|---|---|---|---|
| ICAEW | The accountancy institute groups sustainability resources on one page, including its Climate Hub, Nature and Biodiversity Hub, non-financial reporting and sustainability assurance. | Resources and programmes such as its Sustainability Accelerator Programme and Fundamentals of Sustainability Programme. | A source on UK SRS: the page names neither UK SRS nor IFRS S1 or S2. |
| ISEP | The Institute of Sustainability and Environmental Professionals, formerly IEMA — the same legal entity under a new name from 8 January 2025. | Affiliate membership by online sign-up with no assessment; professional grades are assessed. | Proof of competence at Affiliate grade. |
| Society for the Environment | The body that awards Chartered Environmentalist (CEnv), plus REnvP and REnvTech. | Join a licensed member body first; show 11 competences, master’s-level thinking (by degree or written work) and pass a professional review interview. | A master’s-degree requirement: written work can show the level instead. |
| The Conduit | A purpose-driven community committed to creating a just and sustainable future, with a private members’ club in Covent Garden. | A members’ club that gathers year-round. | A professional or standard-setting body. |
| UKSIF | Exists to bring together the UK’s sustainable finance and investment community and support its members. | Members include investment managers, pension funds, banks, financial advisers, research providers and NGOs. | A regulator or a stewardship code signatory scheme. |
ESOS lead assessor registers
The Environment Agency’s list, updated 16 February 2026, names seven approved registers: the Association of Energy Engineers, CIBSE, Elmhurst Energy Systems, the Energy Institute, the Energy Managers Association, ISEP and Quidos.
Membership of one of those bodies is not the same as being on its ESOS register; the ESOS lead assessor page explains the difference.
Building the capability
Smaller bodies often give someone part-time ownership of sustainability for the first year; a fractional sustainability lead is one way to do it.
Independent specialists exist for the reporting itself, and a reader can book a free 15-minute call to talk through which duties apply.
In practice
What a membership organisation can do now
First, run the tests on your own organisation: the tier for a charity, paragraph 20B for a company, and PPN 006 for any large public bid.
Second, map which members are caught by which regime, and plan briefings around their dates, starting with the FCA’s first reporting periods from 1 January 2027.
Third, measure your own Scope 1 and 2 footprint even where no rule requires it, because partners and sponsors will ask; any carbon reporting software that follows the GHG Protocol will do the arithmetic.
Fourth, keep every sustainability claim to what you can evidence, in marketing as much as in the trustees’ report.
A tier 3 charity has a fixed place for that evidence; everyone else chooses where to put it.
Frequently asked
Membership organisations, answered
Does UK SRS legislation apply to membership organisations?
Almost never.
The only UK SRS reporting duty is the FCA’s, in PS26/19, and it applies to companies with securities in five UK Listing Rules categories (UKLR 6, 14, 15, 16 and 22), on a comply-or-explain basis for accounting periods beginning on or after 1 January 2027.
A professional body, trade association, charity or members’ club without listed securities has no UK SRS duty, though it may use the standards voluntarily.
Do charities have to report on sustainability?
It depends on the tier in the Charities SORP 2026, which took effect on 1 January 2026.
A tier 3 charity, with gross income above £15 million, must summarise in its trustees’ annual report how it is responding to and managing environmental, governance and social matters.
Tier 1 and tier 2 charities may choose to explain this, but are not required to.
What are the Charities SORP 2026 tiers?
Tier 1 is every charity preparing accruals accounts with gross income of not more than £500,000.
Tier 2 is gross income of not more than £15 million.
Tier 3 is every charity above the tier 2 threshold.
The SORP was published by the joint SORP-making body of the Charity Commission for England and Wales, the Charity Commission for Northern Ireland and the Office of the Scottish Charity Regulator.
Does SECR apply to a company limited by guarantee?
It can.
A company limited by guarantee is still a company formed and registered under the Companies Act 2006, so the SECR test in SI 2008/410 Schedule 7 paragraph 20B applies to it like any other unquoted company.
It is exempt if it meets two or more of: turnover not more than £36 million, balance sheet total not more than £18 million, and not more than 250 employees.
A body with 250 or fewer staff and turnover of £36 million or less meets two and is exempt.
Does a trade association need a Carbon Reduction Plan?
Only when it bids for a contract where an in-scope central government authority applies PPN 006, and the contract is above £5 million a year including VAT, averaged over its life.
The plan is then a condition of participation in that procurement.
No law requires an organisation to hold one otherwise.
Do I have to give a corporate member our emissions data?
No statute requires it.
A large member, sponsor or customer asking for your emissions is usually gathering data for its own Scope 3 inventory.
It may make the data a term of a contract, which is a commercial obligation you can negotiate, not a regulatory one.
Is there sustainability reporting software for charities?
No law or SORP requires a particular tool.
A charity that measures its footprint can use any method that follows the GHG Protocol, and the carbon reporting software market serves charities as it does companies.
What the SORP asks of a tier 3 charity is a narrative summary in the trustees’ report, not a calculation in a particular system.
Which membership bodies are there for sustainability professionals?
Several, each with its own route.
ISEP, formerly IEMA, offers individual membership grades, with the professional grades assessed.
The Society for the Environment awards the Chartered Environmentalist registration through licensed member bodies.
ICAEW runs sustainability resources for accountants.
UKSIF brings together the sustainable finance and investment community.
Seven professional bodies run the approved ESOS lead assessor registers.
This page describes each from its own material and does not rank them.
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.
- Financial Conduct AuthorityPS26/19: Aligning listed issuers' sustainability disclosures with international standards
The only UK SRS reporting duty: five listing categories, comply or explain from 1 January 2027.
- Financial Conduct AuthorityPS26/19 (PDF), ¶¶3.6 and 3.12
The categories in scope and the start date.
- Department for Business and TradeUK Sustainability Reporting Standards — guidance
UK SRS S1 and S2 are available for voluntary use by any entity.
- Charities SORP-making bodyCharities SORP 2026 (FRS 102), Module 1 ¶¶1.60–1.65 and the tier table
The three tiers, the “must” for tier 3 and the “may” for tiers 1 and 2, and the SECR reminder for charitable companies.
- Financial Reporting CouncilSORPs — Charities SORP 2026 (October 2025)
Effective 1 January 2026.
- legislation.gov.ukSI 2008/410 Schedule 7 paragraph 20B
SECR’s exemption for an unquoted company meeting two or more “not more than” conditions.
- legislation.gov.ukCompanies Act 2006, section 414CA
The climate-related financial disclosure scope, with its 500-employee floor.
- Cabinet OfficePPN 006: Taking account of Carbon Reduction Plans in the procurement of major government contracts
Contracts above £5 million a year including VAT, averaged over the life of the contract.
- GHG ProtocolCorporate Value Chain (Scope 3) Standard
Why a corporate member asks a supplier for emissions data.
- Companies HouseCompany 03690916 — previous company names
ISEP’s legal name change on 8 January 2025, and its form as a private company limited by guarantee.
- ISEPMembership — membership tiers
Affiliate by sign-up; professional grades assessed.
- Society for the EnvironmentChartered Environmentalist
CEnv through a Licensed Member body; 11 competences; professional review interview.
- ICAEWSustainability and climate change
The institute’s own grouping of its sustainability resources.
- UKSIFAbout UKSIF
Its own statement of purpose and the kinds of member it has.
- The ConduitThe Conduit — home and Our impact
Its own description of the club and how it says it operates.
- GOV.UK (Environment Agency)Energy Savings Opportunity Scheme — approved lead assessor registers
The seven registers, list updated 16 February 2026.