ISO 20121 · Event sustainability management systems
ISO 20121 certification consulting for events that are sustainable by design, not by claim.
Earn ISO 20121 certification from an independent certification body, accredited for the standard where that route exists, on a plan built around your event calendar. Sterling's expert and experienced consultants build an event sustainability management system with your planning, production and procurement teams, gather the evidence at a live event and stay with you through the certification audit and beyond, in 60+ countries. We ensure successful certification for our clients.
- An all-inclusive proposal for an agreed scope, covering consulting, Effivity software, Sterling Academy access and internal auditor training, as applicable to your standard, in one proposal
- A team of expert and experienced event sustainability consultants, advising on management systems across sectors and countries since 2003
- The Sterling Promise: 100% on-time completion, 100% success, 8,100+ client engagements. Sterling does not certify; an accredited body audits and decides
8,100+ client engagements in 60+ countries.
ISO 20121 client experience
What it is
What is ISO 20121 and what is it used for?
ISO 20121 is the international standard for event sustainability management systems. It sets requirements for managing the environmental, social and economic impacts of any type of event or event-related activity across the whole event management cycle, from concept and planning through delivery to post-event review. It applies to the organisation behind the events, whether a conference organiser, a stadium or a caterer, and its influence is meant to reach through the supply chain to the interested parties each event touches. By its own account it is not a checklist or a reporting framework: it makes sustainability part of every decision an event team takes.
The real test is whether sustainability survives event week. Do the people who choose the venue, sign the caterer, print the signage and schedule the breakdown know what was promised, and is there evidence of what happened to the waste, the energy, the food and the workers? A system built around those decisions changes how events run; one written for the auditor leaves a policy on the website and a skip of single-use signage on the Monday after.
Current edition. ISO 20121:2024, the second edition, was published in April 2024, replacing ISO 20121:2012, which ISO withdrew that month. The first edition was inspired by the London 2012 Olympic and Paralympic Games and the revision by Paris 2024. The 2024 text follows the harmonised structure and strengthens its environmental, social and governance content, with more weight on climate change, legacy, and human and child rights. Transition dates for 2012 certificates were set by the accreditation body or certification body concerned: ACCREDIA, Italy's accreditation body, allowed accredited certificates until April 2026, and BSI's period ends on 31 March 2027. Confirm the status of a 2012 certificate with its issuer; first-time implementers build to the 2024 edition.
Who it is for
Who needs ISO 20121 certification?
ISO 20121 is written for any organisation that plans, manages, hosts or supplies events, whatever its size: organisers and agencies, venues, exhibition contractors, sports and public bodies, and suppliers from caterers and security firms to lighting, sound and staging companies. The International Olympic Committee obtained ISO 20121 certification for its own corporate events; a small caterer can apply the same framework at its own scale. Organisations come to Sterling for ISO 20121 from four starting points:
- An event owner, client or tender asks for it. Rights holders, corporate clients and public bodies choosing a venue, agency or supplier want evidence that sustainability commitments will be delivered on the day. Confirm the events, venues and phases the certificate must cover, and whether accredited certification is expected, before you commit.
- Sponsors, partners and attendees want proof, not claims. The 2024 edition names partners and sponsors among the interested parties to engage where relevant, and an unevidenced sustainability claim is a reputational risk. ISO 20121 ties each claim to an evaluated issue, an objective and a record.
- You run recurring events and want each edition to cost less and waste less. Annual conferences, exhibitions, festivals and tournaments repeat the same decisions each year; a management system turns last year's lessons into this year's specification, so savings are kept rather than rediscovered.
- You hold a 2012 certificate, or the system has stopped working. The issues register has not changed since the first audit, supplier questionnaires go unanswered, nobody reports on legacy and the 2024 transition is due or overdue. The system needs rebuilding around how your events run today.
The benefit is control over the impacts your events create, and evidence of it; lower costs, stronger bids and better relations with sponsors and neighbours come from running the system, not from the certificate.
Business benefits
How ISO 20121 supports bids, budgets and reputation
An event sustainability system earns its keep where decisions are made under pressure: the late venue change, the sponsor's giveaway, the caterer nobody checked. We start with the issues carrying the most impact and reputational exposure, and build outward.
- Stronger bids, clients who returnA certificate scoped to the events, venues and phases a rights holder or client asks about, with evidence ready for their supplier checks.
- Lower cost per eventMaterials reused from one edition to the next, food ordered to realistic numbers, power planned for the actual load and less waste to haul away, with the savings measured rather than assumed.
- Claims you can stand behindEvery public statement on waste, local sourcing or accessibility traced to data and to its objective, so marketing and evidence agree.
- A supply chain pulling in the same directionSustainability requirements in tenders and contracts, proportionate questions for small suppliers, and performance reviewed after each event rather than taken on trust.
- Fewer surprises for people and communitiesLabour conditions, human and child rights, accessibility, neighbours and crowd welfare evaluated as issues before the event, not discovered as complaints after it.
- A legacy you can reportAchievements and lessons learnt reported after each event, so the next edition, host city or client starts from evidence.
Judge the system on a handful of measures, such as waste per attendee, the share of suppliers meeting your requirements, energy per event day and the time taken to close post-event actions. A longer issues register is not a sustainability result.
Requirements
What are the main ISO 20121 requirements?
ISO 20121:2024 is built on the harmonised structure shared by ISO management system standards, clauses 4 to 10, and adds what is specific to events: sustainable development principles and a mission statement, the identification and evaluation of sustainability issues, supply chain management, and a management review of performance against the governing principles of sustainable development. Four informative annexes support it, on planning and implementation, supply chain management, evaluation, and human and child rights. The table is a plain-language map; the programme checks your system against the 2024 text itself.
| Clause | What it requires of you | What it looks like in practice |
|---|---|---|
| 4 Context of the organisation | Understand the issues that affect your events, climate change among them, and the interested parties to engage; set the scope of the system; define your sustainable development principles and mission statement (4.5) | A scope naming the events, venues and event-cycle phases covered; an interested-party map from attendees, sponsors and partners to crews, neighbours and the event owner; principles and a mission statement agreed by leadership |
| 5 Leadership | Top management leads the system, sets a policy whose commitments include reporting on achievements and lessons learnt and, where appropriate, legacy, and assigns roles and authorities | A policy tied to your principles and used when budgets and suppliers are chosen, sustainability duties in planning, production and procurement roles, and leaders who review results after each event |
| 6 Planning | Address risks and opportunities, including issue identification and evaluation (6.1.2) and legal and other requirements (6.1.3); set event sustainability objectives and plan to achieve them (6.2); plan changes to the system (6.3) | An issues register covering environmental, social and economic issues, scored against criteria you can explain; permits, licences and legal duties listed by venue and country; objectives with targets per event; and a check before the format, venue or scale changes |
| 7 Support | Provide resources, competence and awareness; communicate internally and externally; create and control documented information | Competence records for buyers and producers, briefings for staff, crew, volunteers and contractors before each event, attendee messaging that matches the evidence, and controlled plans and checklists |
| 8 Operation | Plan and control the processes that deliver each event (8.1), manage changes (8.2) and manage the supply chain (8.3) | Controls for build, live and breakdown covering waste, energy, materials, food, water, accessibility and welfare; supplier requirements in selection, contracts and briefings; and late changes recorded with how they were handled |
| 9 Performance evaluation | Monitor, measure, analyse and evaluate (9.1); audit internally (9.2); review at management level, including performance against the governing principles of sustainable development (9.3) | Data gathered during and after each event, internal audits set around the calendar, and a management review that tests results against your principles and decides for the next edition |
| 10 Improvement | Improve continually (10.1); react to nonconformities, correct their causes and check the action worked (10.2) | A post-event debrief that becomes an action list, corrective actions closed with evidence, and performance that improves from one edition to the next |
What does useful ISO 20121 evidence look like?
The scope and principles, an issues register with its evaluation criteria, the legal register for each venue, supplier requirements and responses, event plans with the controls built in, waste transfer notes and weights, energy and fuel readings from build to breakdown, briefing records, a post-event report on achievements and lessons learnt, and corrective actions closed with proof. We identify the records your events need; they live in Effivity from the first workshop, so the auditor sees a system that has already run through an event.
ISO 20121 requirements explained, from context to improvementCertification process
How do you get ISO 20121 certified?
Put the system to work at a real event first; then an independent certification body assesses it. Sterling provides consulting and preparation; the audit and the certification decision stay with the certification body, which is what makes the certificate credible to an event owner, client or sponsor.
- 01Decide what the certificate should cover.One event, a recurring event or your whole event business; which venues, countries and phases of the event cycle; and what the client or event owner expects to see.
- 02Gap analysis: compare how events are run today with the requirements.The gap analysis follows an event from concept to close-out, keeps the practices that already work and sets actions, owners, dates and resources for each gap.
- 03Agree principles, evaluate issues and brief suppliers.Principles and mission statement signed off, issues evaluated and prioritised, legal requirements identified by venue, supplier requirements written into procurement, and the event team trained before the next event.
- 04Run an event on the system, then audit and review it.Controls operated through build, live and breakdown, data collected and the post-event review held, then an internal audit and a management review; whatever the certification auditor would find, we raise first and close with evidence.
- 05Complete the independent assessment.The certification body's Stage 1 readiness review, then the Stage 2 audit, planned around a phase of the event cycle it can observe, often a live event; answer any findings, and the body decides.
- 06Improve from one event to the next.Post-event reviews, internal audits and management reviews continue, with surveillance audits timed to later events and, for recurring programmes, recertification in the third year.
Check the route before the price. Ask which certification body will issue the certificate, whether its accreditation covers ISO 20121 and from whom, which events and phases it will audit and when, and confirm the answers with the bodies concerned. Where your market has no accredited route yet, agree with the client or event owner whether they accept certification without it. A certificate offered before any event has run on the system is paper, and it will not survive a rights holder's due diligence. How to choose a credible ISO 20121 provider · The certification buyer's checklist
Cost
How much does ISO 20121 certification cost?
A single price for ISO 20121 would mislead you: a venue certifying its own operations, an agency running forty client events a year and a greenfield festival need very different programmes. Sterling commits to a proposal in which every element is visible and nothing is added later before work begins.
| Cost component | What affects it |
|---|---|
| Consulting and implementation | The events, venues and countries in scope, the maturity of your planning and procurement, the state of your event data and how much of the work your own team carries (Design™ or Drive™) |
| Independent certification | Audit days, calculated from your staff and, where event delivery is in scope, the people working the event; venues and events covered; expected attendance; travel; and surveillance at later events |
| Measurement and supplier evidence | Waste weighing, temporary energy metering, attendee travel surveys, supplier questionnaires, and any change to catering, materials or staging the issue evaluation calls for |
| Internal resources | Time from event managers, production, procurement and venue operations, briefings for crew and volunteers, and the post-event reviews |
| Software and learning | Effivity for the system and Sterling Academy access for your people, both part of a Sterling engagement, with users, courses and access period set out in the proposal |
| Continued support | Surveillance readiness for later events, internal audits, refresher learning and future transitions under Sustain™ |
What moves the price
- One event, a recurring series or your whole event business in scope
- Venues, countries and the phases of the event cycle to be certified
- Headcount, plus the crews and contractors who work your events
- How much of your supplier base needs new requirements
- The date of the next event, and the capacity your team can commit before it
What a Sterling proposal always shows
- Deliverables, responsibilities, assumptions and exclusions, set down in writing
- Certification-body fees on a separate line, so the whole programme can be compared
- Effivity, training and Academy access itemised, at no additional cost
- Payments due on delivered milestones, not on elapsed time
- One all-inclusive proposal. No surprises, ever
Timeline
How long does ISO 20121 certification take?
Typically three to six months from kick-off to the Stage 2 audit, with your event calendar, not the paperwork, setting the pace. Principles, issue evaluation and supplier requirements must be in place before an event; the controls must run through at least one event, so there is data and a post-event review; an internal audit and a management review follow. Certification bodies then plan the audit around the phases of the event cycle they need to verify. We plan backwards from your event dates, with milestones tracked in Effivity.
| Phase | What determines the pace |
|---|---|
| Scope and gap analysis | Access to event plans, contracts, supplier lists, venue information and the people who run events |
| Principles, issues and supplier controls | How quickly leadership agrees the principles, how many issues and suppliers need work, and the changes the evaluation calls for |
| An event on the system | The date of the next event in scope, data captured through build, live and breakdown, the post-event review, then internal audit and management review |
| Certification assessment | The certification body's availability, Stage 1, a Stage 2 scheduled around the event-cycle phases in scope, and the time to close any findings |
Share your event calendar at the first call, especially if a bid, contract or sponsor has fixed a date. We will tell you plainly which event can carry the certification audit and what has to be decided before it. A provider that names a certification date without asking when your next event is has not understood the standard.
Challenges
Common ISO 20121 implementation challenges
ISO 20121 programmes run into the same five obstacles. Each has a practical answer, and none of the answers is more documentation.
The event that proves the system is months away, or already over.
A system cannot be shown working without an event. We map the calendar at the start, choose the event that will carry the evidence and the audit, plan backwards from it and check whether an earlier, smaller event can carry part of the evidence.
Sustainability belongs to one enthusiast, not to the event team.
When only the sustainability lead knows the principles, venues, suppliers and materials get chosen without them. We write responsibilities into planning, production and procurement roles, add checks to the templates those teams already use and brief crews before each event.
Suppliers will not, or cannot, answer your questions.
Long questionnaires go unanswered, especially by small suppliers. We set proportionate requirements by supplier category, write them into tenders and contracts, collect the evidence that matters for your issues and review performance after the event, as the supply chain clause and its guidance annex intend.
There is no data from build, live and breakdown.
Waste leaves site without weights, generators run without fuel logs and nobody knows how attendees travelled. We define what is measured in each phase, who records it and how, and bring the results into Effivity, so the post-event report is written from data rather than estimates.
Your certificate is still to the 2012 edition.
Transition periods have already closed for some certificates, and BSI's runs to 31 March 2027. We confirm your certificate's status, review the 2024 changes on climate change, legacy, human and child rights, sponsors and the supply chain against your system, close the differences and help arrange the transition audit.
Your engagement
What your ISO 20121 engagement includes
The agreed scope covers everything a working system and a prepared team need. Many providers stop at a policy and templates, leaving you to find software, training and audit support; a Sterling engagement is the whole journey, from one team, under one all-inclusive proposal.
Scope, gap analysis and implementation plan
Events, venues and phases fixed, the gap analysis complete, and a plan with owners, dates and the event that will carry the evidence, agreed before work starts.
Principles, issues, supplier controls and procedures
Sustainable development principles and mission statement, the issue evaluation, the legal register by venue, supplier requirements and event-phase controls, built with your team on Sterling's template sets.
Effivity ISO & GRC software
Principles, issues, suppliers, event data and audits held in Effivity from the start, included with the engagement at no additional cost.
Training for everyone
Complimentary awareness training for your people as part of the engagement, with preferential Sterling Academy access and special pricing, and internal auditor training for your audit team, as applicable to your standard.
Internal audit and management review
Conducted or facilitated as agreed once an event has run on the system, with findings closed with evidence before the certification body arrives.
Certification readiness and support
Preparation for the Stage 1 readiness review and for a Stage 2 audit timed to your event, and support with any findings until the certificate is issued.
Certification decisions remain with the independent certification body.
How we deliver
How Sterling supports your ISO 20121 implementation
Every ISO 20121 engagement runs on Sterling OS™, our delivery operating system, in five phases with named deliverables, decision owners and evidence at each step. You decide how much of the work your team carries; the method, the software and the accountability are the same either way.
- 01Design™Guided implementation: your sustainability lead and event managers implement with Sterling's structure, templates, workshops and coaching.
- 02Drive™Fully managed consulting: Sterling consultants carry the agreed work, from the issue evaluation to the supplier requirements, alongside your event team.
- 03Sustain™After certification: surveillance readiness at later events, internal audits, post-event reviews, refreshers and training for new staff and crew.
- 04Automate™The system running in Effivity: issues, legal requirements, suppliers, event data, audits, actions and management review in one workspace.
- 05Revise™Transitions to revised editions, such as the move from ISO 20121:2012 to the 2024 edition, and changes in venues, formats, markets or regulation.
At kick-off we agree the engagement team, the weekly working session, the deliverables and who decides what, and review progress against them, so a missing supplier requirement or an unmeasured waste stream surfaces months before the audit, not on event day.
How Sterling OS™ worksOften combined with
Standards organisations pair with ISO 20121
- COPC CX StandardCOPC CX Standard certification readiness for contact centres and CX operations: gap assessment, metrics, processes and people, with Sterling's support.
- EMASEMAS registration explained: requirements, the validated environmental statement, the verifier and Competent Body route, cost factors and all-inclusive support.
- FSC and PEFC chain of custodyFSC and PEFC chain of custody certification and requirements: FSC-STD-40-004 V3-1, PEFC ST 2002:2020, the audit route and cost factors, with Sterling.
- GHG ProtocolGHG Protocol inventory consulting: scope 1, 2 and 3 emissions on boundaries and methods an outsider can test, ready for independent verification.
- ISCC PLUSISCC PLUS certification for circular and bio-based materials: requirements, mass balance, ISCC HUB registration, standalone documents and an all-inclusive plan.
- ISO 14001ISO 14001 certification consulting: aspects, impacts and compliance obligations controlled, with support until an accredited body certifies you.
Effivity · software for your ISO 20121 system, included in every engagement
How Effivity helps you fulfil, automate and simplify the requirements of ISO 20121:2024.
Every Sterling ISO 20121 engagement includes Effivity, the ISO and GRC automation platform built by the Sterling group and used in 50+ countries. Your consultant configures its context, risk, compliance obligations, documented information, supplier evaluation, waste, audit and management review modules within the agreed scope, so principles, issues, legal requirements, supplier evidence, event data and post-event reviews sit in one workspace and the auditor reviews records from a real event rather than a binder. The subscription comes included with a Sterling engagement, at no additional cost.
Context, principles and mission statement
The issues that shape your events, climate change among them, interested parties from sponsors to neighbours, the scope by event, venue and phase, and your principles and mission statement, reviewed before each season.
Policy, commitments and roles
The policy with its commitments on reporting achievements, lessons learnt and, where appropriate, legacy; sustainability duties by role; and leadership sign-offs recorded where they are made.
Issues, legal requirements and objectives
Issue identification and evaluation with your scoring criteria, legal and other requirements by venue and country, objectives and targets per event, and planned changes, with actions tracked to closure.
Competence, briefings and documented information
Competence records for buyers and producers, briefing records for staff, crew and volunteers linked to Sterling Academy, and event plans and checklists with versions and approvals.
Controls for every event phase
Checklists and forms for build, live and breakdown, waste and energy logs, food and materials records, and late changes with the decision taken, built without code around how your events run.
Supplier requirements and evidence
Supplier categories, requirements and questionnaires, evaluations before award and reviews after the event, with certificates and declarations filed against each supplier.
Event data, internal audit and management review
Performance data per event on dashboards, audit programmes set around the calendar, and a management review recording results against your governing principles, decisions and actions.
Post-event review and corrective action
Debrief findings, complaints, incidents and audit findings raised, investigated to cause and closed with evidence, so the next edition opens with last year's lessons already applied.
What this means at the audit
The auditor asks for your principles and mission statement, the issue evaluation, the legal register, supplier requirements and responses, data from the observed or most recent event, the post-event review, the internal audit and the management review. In Effivity each is a screen with dates, owners and evidence attached, not a shared drive assembled the week before the event. After certification, Sustain™ runs in the same workspace, so each surveillance audit finds the system where the last event left it.
In your engagement
- Subscription included with the engagement, at no additional cost
- Configured by your Sterling consultant within the agreed scope
- Your supplier lists, event data and registers migrated, not retyped
- Admin and user training for your event and sustainability teams
- The same workspace extended to EMS, OHSMS, QMS and more when you integrate
ISO 20121 client experience
Client letters on file, available on request.
Signed client letters for ISO 20121 are available on request. The client feedback wall lists every letter by standard.
Integrated programmes with ISO 20121 in scope
How event sustainability runs inside an integrated programme.
- 01Integrated management systems
Venues and exhibition centres: environment, safety and event sustainability as one system
How an ISO 14001, ISO 45001 and ISO 20121 programme typically runs: one context, legal register and set of roles covering the building's permanent operations and the events it hosts; aspects and event sustainability issues evaluated in the same workshops, because the same halls, loading bays and waste yard appear in both; contractor controls for build and breakdown written once for safety and sustainability; and one internal audit programme and management review, audited together where one certification body covers all three. Event sustainability keeps its own principles, supplier requirements and post-event reviews (clauses 4.5, 8.3 and 9.3).
Sterling Academy · ISO 20121 e-learning
Train the whole event team on ISO 20121, not only the sustainability lead.
Most of an event's impact is decided by people who never read the policy: the planner choosing a venue, the buyer approving a supplier, the crew chief at breakdown. Sterling Academy provides e-learning for them and for the people who run the system: video lessons with practice checkpoints, a final exam and a numbered Certificate of Completion for each learner, verifiable online. Clients of Sterling's consulting practice receive preferential Sterling Academy course access and special pricing, arranged through their consultant, including complimentary awareness training for their people as part of the engagement.
- ISO 20121 awareness for every employee, with a certificate for each learner as the record
- Practitioner courses for the sustainability lead, event managers, buyers and the owners of the registers
- Internal auditor training for the people who will audit the system, as applicable to your standard, as part of the engagement
- Progress by team and by event, and a training status report ready for the auditor
- New staff trained as they join, so the evidence is current whenever a surveillance audit falls
- A Sterling consultant on hand when a learner has a question
Keep exploring
Explore more about ISO 20121
Watch a video on how to implement ISO 20121 here.
Watch a video on ISO 20121 requirements here.
Why Sterling
Want successful ISO 20121 certification? Come to Sterling.
Whether you are certifying one venue or a portfolio of events moving between cities and countries, Sterling helps you set shared principles and controls with clear ownership at every event. We work through differences in waste infrastructure, venue contracts, labour law and supplier markets from one country to the next, so the system holds together while each event meets its own obligations.
Implementing management systems since 2003, in 60+ countries
Environmental, safety, quality and integrated systems built across sectors, with offices in 21 countries and one engagement team answerable wherever your events take place.
All-inclusive proposal
Consulting, Effivity, training and Academy access in one proposal, and certification-body fees shown on their own line. No surprises, ever.
A system your event team will use
Less documentation and maximum effectiveness: requirements built into the briefs, checklists, contracts and software your planners, buyers and crews already use, so the system travels with every event.
Expert and experienced consultants
Consultants who have advised on management systems across sectors and countries since 2003, and who build your event sustainability system properly the first time, so the certification audit confirms what already works on site.
The Sterling Promise
What our ISO 20121 certification success guarantee means
Our support continues until you reach the ISO 20121 certification outcome your engagement defines: through implementation, the event that carries the evidence, audit preparation and any findings raised. Clear explanations, practical delivery, included software and learning for your people turn the investment into a capability your event team keeps, rather than a logo on the delegate pack.
Your engagement records the standard, scope, intended outcome and who is responsible for what. Your organisation supplies accurate information, runs the agreed controls at its events and lets the certification body observe them. That body assesses conformity and alone makes the certification decision. Our commitment covers the agreed certification support, not a promise that every bid is won or every sustainability target met.
After certification
What happens after ISO 20121 certification?
An event sustainability system proves itself at the next event. Issues are re-evaluated when formats, venues or suppliers change, post-event reviews feed the next plan, achievements and lessons learnt are reported, and corrective actions are checked for effect. For recurring events or an ongoing event business, the certification body returns for surveillance, normally each year at phases of your events it can observe, and recertifies in the third year; a certificate for a single event may instead be tied to that event's cycle.
Under Sterling OS™ Sustain™ we review event results, supplier performance and open actions with you before each season, alongside internal audits, management reviews and surveillance preparation, so the system is ready at every event rather than rebuilt before an audit.
FAQs
Frequently asked questions about ISO 20121
Is ISO 20121 certification mandatory?
No law requires it. Event owners, rights holders, clients and public bodies can make it a tender or contract condition, and some organisations adopt it unprompted because it brings sustainability into planning, where changes cost least.
Can a single event be certified, or only an organisation?
Both. A system can be set up for one event or for a whole programme of events and services. Under Italy's ACCREDIA rules, for example, a certificate for a single event with no further editions is valid for that event's cycle, while a system covering recurring events holds a three-year certificate with surveillance. Ask your certification body how it treats one-off events.
Can venues and event suppliers be certified, not only organisers?
Yes. The standard covers any type of event or event-related activity, and certification bodies certify venues, caterers, security, lighting and sound suppliers as well as organisers. The certificate's scope should state which activities, sites and event phases were verified.
Do we need third-party certification, or can we declare conformity ourselves?
The standard allows three routes: first-party self-declaration, second-party confirmation by an interested party such as a client, and independent third-party certification. Self-declaration costs least but rests on your own word; certification gives an event owner, sponsor or client an independent opinion. The system and its evidence are the same either way.
Is accredited ISO 20121 certification available in our country?
It depends on the national accreditation body. Italy's ACCREDIA and the UAE's EIAC both accredit certification bodies for ISO 20121:2024 under ISO/IEC 17021-1. In the United Kingdom, UKAS invited certification bodies to a pilot accreditation programme in October 2025, and the Philippine Accreditation Bureau did not list the standard as of September 2026. Where no accredited route exists, check the body's credentials and scope, and whether your client will accept its certificate.
Does Sterling issue the ISO 20121 certificate?
No. Sterling's role is consulting, training and software. The audit and the certification decision belong to an independent certification body. Treat an offer of consulting and a certificate from the same source as a warning sign.
Does ISO 20121 measure our event's carbon footprint?
Not by itself. The 2024 edition requires you to consider climate change in your context and to evaluate issues that often include travel, energy, food and materials, but it is not a reporting framework or a method of evaluating sustainability performance. A verified greenhouse gas inventory is the subject of ISO 14064-1; an ISO 20121 system supplies the managed data such an inventory draws on.
We are certified to ISO 20121:2012. What do we need to do?
Check first that your certificate is still valid: accredited certificates under ACCREDIA's scheme had to transition by April 2026, and BSI's period ends on 31 March 2027. Then review the 2024 changes against your system, close the gaps and have the transition assessed at a surveillance audit, at recertification or in a separate audit. A Revise™ engagement covers the review, the plan and the audit preparation.
What do you need to prepare an ISO 20121 proposal?
The events, venues and countries to be covered, your headcount and the crews who work your events, your next event dates, whether a system or certificate exists today, any client or tender requirement, and your deadline. That is enough for a scoped, all-inclusive proposal; no sustainability policy or issues register is needed first.
Before the first call
Prepare a useful ISO 20121 readiness brief
There is no need for a sustainability policy or an issues register before the first conversation. A short account of the events you run and where the certificate should help is enough. Seven questions:
- Who is asking for ISO 20121, a client, a rights holder, a tender, a sponsor or your board, and which events, venues and activities should it cover? If nobody has asked, what should your events do differently?
- What kinds of events do you run or support, how often, in how many venues and countries, and for roughly how many attendees?
- Which parts of the event cycle do you control directly, and which sit with venues, agencies, contractors or the event owner?
- Which suppliers shape your events' impact most, and what do your tenders and contracts ask of them today?
- What data do you collect now on waste, energy, travel, food, accessibility or complaints, and who collects it?
- Who can make decisions and give time to implementation, internal audit and staff learning, before and during event season?
- When are your next events, and is there an existing certificate, a transition date or a client deadline to plan around?
With these answers we can scope the work and price it realistically; they are a starting point for discussion, not a score and not a certification decision.
Don’t be fooled by certification scams
If it takes ten days, it is not ISO 20121 certification.
An ISO 20121 certificate is worth having when its scope names the events and phases a client cares about, its issuer can show what it is accredited for, and the system has run through a real event. Sustainability attracts shortcuts: "sustainable event" badges sold online, certificates from bodies whose accreditation does not cover the standard, and audits that never see an event. They cost less, until a sponsor, a rights holder or a journalist checks.
How to choose a credible ISO 20121 provider
- Ask who will issue the certificate and how you can confirm its status, its scope and the event phases it covers with that body directly.
- Check any accreditation claim for ISO 20121 with the accreditation body itself. Accreditation names the standards it covers, and Global ACI members, whose arrangement replaced the IAF MLA and ILAC MRA, publish each certification body's scope.
- Ask how the programme will work with your real events, suppliers and venues. An issues register or supplier questionnaire with another organiser's event names still in it is the clearest sign of a template sale.
- Establish who carries each task, which audit costs are separate, which event the audit will observe, and what help you get when a finding needs corrective action.
- Ask what your teams will be taught and which platform will hold the system. Without trained event teams and a working platform, the system is forgotten between one season and the next.
- Walk away from "certified before your event", "no event needed" and one invoice for consulting and certificate. An event sustainability system has to run through an event before anyone can accurately certify it.
Talk to a consultant
Plan your ISO 20121 certification with confidence.
Tell us your goals, locations and target date. We’ll help you define the scope, timeline and next steps.
hello@sterling-grc.com+1 201 263 4443 (global headquarters) · your nearest office and its number are at the top of this page
What would you like to achieve?
Choose a starting point. The enquiry form takes about a minute.
Book my free discovery callContinue to the enquiry form to share your details. Please do not include passwords, sensitive personal information or confidential files. A Sterling consultant replies within one working day. Privacy notice