Walk down any supermarket aisle and the packaging is full of it: "eco-friendly", "green", "kind to the planet". Most of it means nothing, with no number behind it and nothing to check. That gap between the word and the truth is what ISO 14021 exists to close.
ISO 14021 is the international standard that sets the rules a company has to follow when it makes its own environmental claim about a product, the kind printed on packaging without a third party signing off.
ISO 14021 is not a green badge you earn and stamp on a box. It is the rule-book for the claims you make yourself. Nobody audits you and hands you a certificate. You follow it, and the claim has to hold up if anyone checks.
ISO 14021 in brief
Here is the standard at a glance, the essentials worth knowing or citing before we get into the detail.
- Standard: ISO 14021
- Full title: Environmental labels and declarations, self-declared environmental claims (Type II environmental labelling)
- Current edition: 2016, with Amendment 1 from 2021 (which added carbon footprint and carbon neutral claims)
- Status: Published and in force
- Type: A requirements and guidance standard you conform to, not a certification
- Published by: ISO/TC 207 (environmental management), subcommittee SC 3
- Family: Part of the ISO 14020 series, 14020 sets the principles, 14021 is self-declared (Type II), 14024 is third-party ecolabels (Type I), and 14025 is EPDs (Type III)
Edition and amendment confirmed on iso.org, June 2026. "Self-declared" (Type II) is the key word. These are claims a company makes about itself, not labels awarded by an outside body.
The rules every claim has to pass
Before it lists specific words, ISO 14021 sets out what any self-declared environmental claim has to be. Strip out the formal language and it comes down to a short test.
A claim should be:
- Accurate and not misleading. True in substance, and true in the impression it leaves, which is not always the same thing.
- Specific. Tied to a real attribute of the product, not a blanket feel-good statement about the whole company.
- Verifiable. You hold the evidence, and someone could check it.
- Relevant. About something that actually matters for that product, not a trivial change dressed up as a breakthrough.
- Substantiated. Backed by data before the claim is made, not after someone challenges it.
The flip side is the words you cannot use on their own, because they cannot be substantiated:
- "Environmentally friendly", "environmentally safe", "earth friendly"
- "Green", "nature's friend", "ozone friendly"
- "Sustainable", unless you can show how it was measured
These are the textbook signs of greenwashing, and ISO 14021 rules them out by name.
A vague claim becomes one you can stand behind once it is specific, tied to a real attribute, and backed by evidence.
The claims ISO 14021 puts limits on
Where the standard gets practical is a set of common claim terms it defines and attaches conditions to. If you want to use one of these words, ISO 14021 tells you what you have to prove first.
The terms it covers
There are quite a few of these terms, and they sort into a few groups:
- End-of-life claims. Recyclable, recycled content, compostable, degradable, reusable, refillable, designed for disassembly.
- Lower-impact claims. Reduced energy use, reduced resource use, reduced water consumption, waste reduction, extended-life product, recovered energy.
- Carbon claims, added in 2021. Carbon footprint and carbon neutral.
How strict the rules get
A few examples show just how strict that can get:
- Degradable cannot be claimed on its own, because everything degrades eventually. You have to say how it degrades and how fast, under realistic conditions.
- Recyclable only holds where the product can actually be collected and recycled at meaningful scale, not just in theory. For packaging specifically, ISO 18604 sets out when something counts as recyclable.
- Recycled content has to separate pre-consumer material (factory offcuts) from post-consumer material (what people use and throw away), because they are not the same thing.
The Möbius loop
The standard also governs the Möbius loop, the three-arrow triangle you see on packaging. On its own it means recyclable.
The bare loop means recyclable. A percentage inside it means recycled content.
With a percentage inside it ("30%"), it means recycled content, and that number has to be a whole number you can substantiate. Using the symbol loosely is exactly what ISO 14021 is designed to stop.
Who uses ISO 14021
ISO 14021 is for anyone who puts an environmental message on a product. In practice that means:
- Brand and marketing teams who write the claim
- Packaging and product designers who decide what is actually true
- Compliance teams who have to defend it if a regulator or competitor pushes back
- Trading-standards officers and auditors who check claims
Whichever side you are on, making the claim or checking it, ISO 14021 gives everyone the same rule-book to work from.
Why ISO 14021 matters for producers
For years, a vague green claim cost a company nothing. You could print "eco-friendly" on a pack and nobody asked for proof. That is no longer true.
The rules changed in 2026
The EU's Directive (EU) 2024/825, the "Empowering Consumers for the Green Transition" rules, apply from 27 September 2026 and ban generic environmental claims such as "eco-friendly" or "green" unless the seller can prove recognised environmental performance behind them.
That turns ISO 14021 from good practice into a working tool. It is the recognised method for making a self-declared claim specific and substantiated enough to survive the new rules.
The same pressure shows up in packaging law, where recyclability claims feed into how producers report and what they pay. A claim built on ISO 14021 is the kind of evidence that holds; one built on a vibe is now a liability.
The proof is the data you already track
This is also where the record-keeping bites. To stand behind a recycled-content or recyclability claim, a producer has to know, per product and per material, what the real number is and where the proof sits.
That is the same data a producer already needs for their EPR reporting, so the honest claim and the compliance record end up being the same exercise, the kind of record an EPR platform is built to keep.
The three types of environmental label
The most common mix-up is between the three kinds of environmental label, which sit in three different standards:
- Type I (ISO 14024) is a third-party ecolabel. An independent body sets the criteria and awards the label, like the EU Ecolabel or the Nordic Swan. You earn it.
- Type II (ISO 14021) is a self-declared claim. You make it and you back it. No outside body is involved, which is why the standard is so strict about substantiation.
- Type III (ISO 14025) is an Environmental Product Declaration, a detailed, data-rich report based on a life-cycle assessment and verified by a third party.
The three label types sit in three different standards. ISO 14021 is the self-declared one, Type II, the only one with no outside body to check it.
In short, Type I and Type III bring an outside checker; Type II does not, so ISO 14021 carries the weight of keeping you honest. All three sit under ISO 14020, which sets the shared principles for any environmental label or declaration.
ISO 14021 questions answered
Below are short, plain answers to the questions people ask us most about ISO 14021.
What is ISO 14021 in simple terms?
ISO 14021 is the international standard, published in 2016, that sets the rules for self-declared environmental claims, the green claims a company makes about its own products without a third party certifying them.
It says what a claim has to be (specific and provable) and bans vague ones like "eco-friendly".
Is ISO 14021 a certification?
No. It is a standard you conform to and reference, not a scheme you get audited and certified against. There is no "ISO 14021 certified" status. Third-party labels live in different standards (Type I ecolabels in ISO 14024, EPDs in ISO 14025).
What edition of ISO 14021 is current?
The 2016 edition, with Amendment 1 from 2021 that added carbon footprint and carbon neutral claims. It is published and in force as of 2026.
What claims does ISO 14021 cover?
It qualifies a defined set of terms, including compostable, degradable, designed for disassembly, recyclable, recycled content, reusable, refillable, waste reduction, and (since the 2021 amendment) carbon footprint and carbon neutral.
For each, it sets what you have to prove before using the word.
Which words does ISO 14021 say you cannot use?
Vague blanket claims that cannot be substantiated: "environmentally friendly", "environmentally safe", "earth friendly", "green", "nature's friend" and "ozone friendly". It also warns against unqualified use of "sustainable".
How does ISO 14021 relate to EU rules on green claims?
The EU's Empowering Consumers Directive ((EU) 2024/825), applying from 27 September 2026, bans generic green claims unless they are substantiated. ISO 14021 is the recognised methodology for making a self-declared claim specific and provable enough to meet that bar.
What is the difference between ISO 14021 and ISO 14024?
ISO 14024 covers Type I ecolabels, awarded by an independent body against set criteria. ISO 14021 covers Type II claims you make and substantiate yourself, with no outside certifier. The first is earned, the second is self-declared.
Does the Möbius loop come from ISO 14021?
Yes. ISO 14021 governs how the three-arrow Möbius loop is used: on its own it means recyclable, and with a percentage inside it means recycled content, expressed as a whole number you can back up.
