ISO 20121: sustainable events. Implementation and certification

What ISO 20121 is

The standard that turns good intentions into management.

ISO 20121 is the international standard specifying the requirements for an event sustainability management system. It is not a green label or a list of good practices: it is a full management system — policy, objectives, operational control, internal audit and management review — applied to any type of event or related activity.

Its second edition, ISO 20121:2024, cancels and replaces the 2012 version. The revision aligns the text with the harmonized structure of Annex SL — the same one used by ISO 9001 and ISO 14001 — and strengthens environmental, social and governance (ESG) requirements, focusing on reducing negative impacts and maximising positive ones.

One nuance that few explain: an event cannot be certified. What is declared conformant is the organisation’s management system, that is, the way the event has been planned, delivered and reviewed. That is why ISO 20121 works equally well for event organisers and owners, venues, agencies and suppliers to the sector.

What’s new in the 2024 edition

What changed since 2012.

Harmonized structure (Annex SL)

Text, clause sequence and definitions now follow Annex SL of the ISO/IEC Directives (2022), making integration with ISO 9001, ISO 14001 or ISO 45001 far easier.

Climate change as a mandatory issue

The organisation must explicitly determine whether climate change is a relevant issue in its context, and interested parties may raise climate-related requirements.

Double materiality

Issue identification may be addressed as a materiality or double materiality assessment: outward impact and inward risks and opportunities.

Human rights and children’s rights

The new Annex D develops human-rights due diligence, salience assessment and access to remedy mechanisms.

Digital and hybrid events

The definition of event now covers physical, digital and hybrid occasions, and digital responsibility appears as an environmental and social issue.

Accessibility, diversity and inclusion

Inclusion is defined as equitable treatment and meaningful participation of all interested parties, referencing universal accessibility.

Who it applies to

If your business produces, hosts or supplies events.

Organisers and agencies

Congresses, trade fairs, festivals, sporting, corporate and institutional events. You can scope it to one event, a series or your whole activity.

Venues and spaces

Convention centres, exhibition grounds, hotels with meeting space, stadiums and unique venues that want to evidence their management to demanding clients.

Sector suppliers

Catering, staging, AV, transport, security, hosting staff or technical production: the scope covers the part of the business serving events.

Owners and sponsors

Bodies that commission or fund events and need to cascade sustainability requirements across the supply chain.

Requirements, clause by clause

From clause 4 to 10. What the standard asks of you.

4. Context of the organisation

Internal and external issues (including climate change), identification and engagement of interested parties, documented scope and — specific to this standard — sustainable development principles and a mission statement.

5. Leadership

Commitment from top management or the governing body, a dated and signed sustainable development policy with a 3-to-10-year vision where appropriate, and assigned roles and authorities.

6. Planning

Risks and opportunities, a documented process to identify and evaluate sustainability issues, legal and other requirements, and measurable objectives with a delivery plan.

7. Support

Resources, competence, awareness, internal and external communication — with an explicit ban on misleading communication, i.e. anti-greenwashing — and documented information.

8. Operation

Operational planning and control, managing change when things do not go to plan and, above all, supply chain management with sustainability criteria in tenders and contracts.

9. Performance evaluation

Monitoring and measurement with indicators, internal audit, management review and evaluation of performance against the governing principles (for example, with a maturity matrix).

10. Improvement

Continual improvement, handling of nonconformities and corrective actions, including remediation.

The four principles

Stewardship, inclusivity, integrity and transparency.

ISO 20121 requires four sustainable development governing principles to be embedded in an overall mission statement. They are not decoration: management review must evaluate performance against them.

Stewardship

Shared responsibility and care by all whose actions affect the environmental, economic and social performance of the event.

Inclusivity

Equitable treatment and meaningful participation of all interested parties, free of discrimination and with universal accessibility as standard practice.

Integrity

Adherence to ethical principles: identify, avoid, address, report and remedy the negative impacts of your activities and relationships.

Transparency

Openness about decisions, activities and results, communicated clearly, accurately, honestly, completely and in good time.

Benefits

What it is actually good for.

Access to public tenders and private briefs that already require sustainability criteria from event suppliers.
A solid argument with sponsors and corporate clients reporting under CSRD who need value-chain data.
Real measurement of waste, energy, travel and event carbon footprint, with a baseline and indicators comparable across editions.
Lower reputational risk: the standard explicitly forbids communication that misleads about real impact.
Tangible and intangible legacy: knowledge, relationships, capabilities and infrastructure that outlast the event.
Integration with your existing systems thanks to the harmonized structure, sharing audits, documentation and indicators.

How we implement it

Six steps. No surprises.

Gap analysis and scope

We assess your starting point and agree the scope with you: one event, a series or the whole organisation, and which stages of the event management cycle are included.

Interested parties and issues

Stakeholder map, engagement process and a documented evaluation of the significance of environmental, social and economic issues.

Principles, mission and policy

We draft the mission statement with the four principles and the sustainable development policy, with SMART objectives and indicators.

System and supply chain

Operational control, sustainable procurement criteria, contract clauses and supplier evaluation. Minimal, useful documentation, all digital.

Internal audit and review

We audit the system, close nonconformities and prepare the management review, including the maturity matrix against the principles.

Certification and improvement

We stand beside you at the third-party audit and stay on at the service level you choose: Relationship, Involvement, Commitment or Support.

Integration

It fits what you already have.

Choose the intensity.

Relationship, Involvement, Commitment or Support: the same team, four service levels depending on how much you want to delegate. All of them include Orbita.PMTools, the platform where your project lives.

See service levels

Frequently asked questions

ISO 20121

Is the event certified, or the organisation?+

The organisation’s management system is certified, not the event. Conformity is declared in relation to how the event was planned and delivered. An organiser may limit the declaration to specific events or parts of the system, and must state this clearly in the scope.

How long does ISO 20121 take to implement?+

It depends on your size, the number of events and your starting point. If you already run ISO 9001 or ISO 14001 the project is considerably shorter, because much of the system is reused. The initial gap analysis gives you a realistic plan.

Is it mandatory?+

No, it is voluntary. That said, more and more public tenders and corporate clients require or score it, and CSRD is pushing large companies to demand sustainability data from their event suppliers.

Does it work for digital or hybrid events?+

Yes. The 2024 edition defines an event as a physical, digital or hybrid occasion and adds digital responsibility — ethical use of technology, information security and reducing the digital footprint — to the issues to be assessed.

How does it relate to ISO 20400?+

ISO 20400 is the guidance on sustainable procurement. ISO 20121 requires supply chain management with sustainability criteria in tenders, contracts and supplier monitoring; ISO 20400 is the natural reference for developing that part.

Can I declare conformity without certifying?+

Yes. The standard allows three routes: self-determination and self-declaration (first party), confirmation by a client or other interested party (second party), and certification by an independent body (third party). We help you pick the one that fits your market.

What documentation is required?+

Scope, principles and mission statement, policy, roles and responsibilities, identification and evaluation of issues, objectives and their planning, supply chain management, monitoring and measurement, and nonconformities and corrective actions. Not one page more than needed.

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