ISO 20121:2024 — What's New in the Revised Event Sustainability Standard and How to Get Certified

The events industry has a sustainability standard with genuine pedigree: born around the London 2012 Olympic Games, ISO 20121 has guided major sporting events, festivals, conferences and their supply chains for over a decade. In 2024, the standard received a significant revision — sharpening its focus on climate change, human rights and legacy, and aligning it with today's stakeholder expectations. This guide covers what ISO 20121:2024 is, who should implement it, what changed in the revision, and how to move from first gap analysis to accredited certification.

What is ISO 20121:2024?

ISO 20121:2024 is the current edition of the international standard for event sustainability management systems. It provides a framework for managing the social, economic and environmental impacts of events and event-related activities — the full triple bottom line, not just carbon and waste.

The original standard was developed with the London 2012 Olympic and Paralympic Games as its proving ground, demonstrating that even the world's most complex event could be planned and delivered through a certified sustainability management system. The 2024 revision updates and strengthens the requirements to reflect current practice: clearer alignment with climate change and greenhouse-gas considerations, the Sustainable Development Goals, and evolving expectations from sponsors, governments, delegates and communities. Terminology and requirements were also refined for clarity and easier integration with other ISO management-system standards.

Crucially, ISO 20121 is a requirements standard designed for third-party certification — organizations can be independently audited and certified, giving clients and partners verified assurance rather than self-declared claims.

Who needs ISO 20121:2024?

The standard is deliberately broad: it applies to all types and sizes of events and to every participant in the event value chain, including:

• Event organizers and agencies — corporate events, sports, festivals, exhibitions, ceremonies
• Venues — stadiums, arenas, convention centers, cultural spaces
• Caterers and food-service providers
• Production, staging, AV and logistics companies
• Contractors and suppliers delivering infrastructure, security, cleaning and staffing

Demand-side pressure is the decisive driver. Major sponsors and corporate clients carry net-zero commitments that extend to the events they fund. Public authorities increasingly require sustainability management for licensed events and public tenders. Rights holders of touring events and sports properties expect host organizers to meet defined sustainability standards. ISO 20121:2024 certification is the recognized way to answer all of them at once.

Key benefits of certification

• Winning work — certification differentiates bids for tenders, sponsorships and rights-holder selections
• Reduced footprint and waste, with the operational cost savings that follow
• Credible climate positioning under the updated framework's stronger greenhouse-gas emphasis
• Better stakeholder relationships — communities, authorities and delegates see structured, transparent management
• A consistent, repeatable approach across every event you deliver, instead of ad-hoc green initiatives
• Independent assurance that protects your brand from greenwashing accusations

What's inside the management system

An ISO 20121:2024 system weaves sustainability into the entire event lifecycle — concept, planning, procurement, delivery and post-event review. Core components include:

• Sustainable development policy and statement of purpose and values, endorsed by top management
• Governing principles of sustainable development the organization commits to uphold
• Identification of interested parties and their requirements — clients, sponsors, authorities, communities, workers, delegates
• Issue identification and evaluation — determining significant sustainability issues across events and operations
• Objectives and plans to achieve them, with measurable indicators
• Roles, responsibilities and competence requirements, including training and awareness for staff and contractors
• Supply-chain management procedures — sustainability criteria in sourcing, contracts and supplier performance monitoring
• Operational controls for event delivery: energy, water, materials, catering, waste, transport, accessibility and community protection
• Communication procedures, internal and external, including transparent reporting
• Monitoring, measurement and evaluation of performance against objectives
• Internal audit and management review
• Nonconformity handling and continual improvement

The structure of the standard

ISO 20121:2024 follows the ISO Harmonized Structure, making it immediately familiar to anyone who has worked with ISO 9001 or ISO 14001:

1. Context of the organization — issues, interested parties and system scope
2. Leadership — commitment, policy, roles and the governing principles
3. Planning — issues, risks and opportunities, objectives
4. Support — resources, competence, awareness, communication, documented information
5. Operation — planning and control of event-related activities and the supply chain
6. Performance evaluation — monitoring, audit and management review
7. Improvement — corrective action and continual improvement

The Plan-Do-Check-Act cycle runs through the whole system, and the shared structure means ISO 20121 integrates cleanly with ISO 14001 and ISO 9001 for organizations running combined systems.

The road to certification

1. Gap analysis — benchmark existing event practices and documentation against the 2024 requirements. Organizations certified to the 2012 edition should map the revision changes specifically.
2. System design — develop the policy, governing principles, procedures, supplier criteria and monitoring tools.
3. Implementation — apply the system to live events, generating the records auditors will need: issue evaluations, supplier assessments, performance data, training logs.
4. Internal audit and management review — verify conformity and effectiveness.
5. Stage 1 audit — the certification body reviews documentation and readiness.
6. Stage 2 audit — on-site (often event-site) assessment of the system in operation, leading to certification.
7. Surveillance audits and periodic recertification maintain the certificate and demonstrate continual improvement under the updated framework.

How AGS can help

Translating the revised standard into a complete documentation set is the slowest stretch of the journey — and the AGS ISO 20121:2024 Management System toolkit (Standard tier, 40 files) delivers it ready-made. The kit includes an editable event sustainability manual aligned to the 2024 edition, procedures for every clause, supplier and stakeholder management templates, operational forms and records, and compliance matrices mapping the documentation to the standard's requirements.

Everything is fully editable, so agencies, venues and suppliers can brand and adapt the system to their event portfolio quickly, then focus on delivery and data instead of drafting. If your next tender, sponsor or rights holder is asking about ISO 20121:2024, the AGS toolkit puts a certifiable answer within reach — available now in the AGS online store.

View the toolkit →