Closing the Loop: Recycled Content in Practice

Recycled content is the most regulated circularity parameter and the one most often claimed inaccurately. The inaccuracy is rarely in the arithmetic; it is in what the number is taken to mean.

Two products can both state thirty percent recycled content while one contains physically recycled material and the other holds an allocated share of a system’s recycled input. Both can be honest and they demonstrate different things.

Where recyclate comes from

The first row deserves scrutiny. Post-industrial scrap has always been recycled, because it is clean, sorted and free, and counting it as recycled content is legitimate under most definitions while demonstrating almost nothing new.

Why supply is the constraint

For most post-consumer streams the limit is not price but availability. Collection rates cap the material entering the system, sorting yields cap what survives to a usable grade, and demand from regulatory targets is rising faster than either.

The consequence is competition for a constrained pool. Where several sectors face recycled content targets on the same polymer, the target does not create supply; it reallocates it toward whoever pays most, which is usually not the sector with the largest volume.

Chain of custody decides the claim

Four models are in common use, and they permit different statements. Identity preservation and segregation support claims about the physical product. Mass balance supports a claim about a system’s inputs. Book and claim decouples the certificate from the material entirely.

Mass balance is what most chains will use, because segregating recyclate through a continuous process is frequently impossible. It is legitimate and it must be described accurately — the models are compared in chain of custody models compared.

What evidence does a verifier accept?

1. A certificate from a recognised scheme covering the supplying site and the period.
2. Purchase records reconciling recyclate input to product output by mass.
3. A stated chain of custody model, applied consistently across the accounting period.
4. Traceability to the recycler, not merely to the compounder who sold you the pellet.
5. Batch-level records where the claim is made about specific products.

The fourth is where most audits find problems. A compounder blends recyclate from several sources, and a claim that reaches only to the compounder cannot say what proportion was post-consumer or where it originated.

Quality is the practical limit

Recyclate is not a uniform input. Mechanical properties, colour and contamination vary between batches, which constrains where it can be used regardless of how much is available.

Designers frequently discover the constraint late: a target set commercially turns out to be unachievable in a part with tight tolerances or a specified colour. Involving materials engineering before the target is announced avoids a public commitment that cannot be delivered.

Design decisions that make recyclate usable

Loosening colour requirements is the single largest one. Recyclate is rarely colour-consistent, and a product specified in a precise shade excludes most available material, whereas a darker or variable finish opens the supply substantially.

Tolerance on mechanical properties matters similarly. Designing with margin, or placing recyclate in non-structural components, converts an impossible target into a routine one without changing the percentage claimed.

What the regulations require

Regulation (EU) 2025/40 sets recycled content thresholds for packaging with dates. Regulation (EU) 2023/1542 sets them per battery metal. The ESPR, Regulation (EU) 2024/1781, will set them per product group through delegated acts.

All three specify percentages and none creates supply, which is the structural tension in this area. Meeting a target is a procurement problem before it is a design one, and procurement is competing against everyone else facing the same date.

Why the passport matters here specifically

Recycled content is the parameter where the gap between a stated figure and defensible evidence is widest. The number is easy to state, the custody trail behind it is not, and nothing in a conventional product record links the two.

A passport holding the figure next to the signed supplier assertion that supports it closes that gap structurally. The claim and its evidence occupy the same record, so producing the evidence under challenge is a retrieval rather than an investigation.

It also makes the type explicit. A field distinguishing post-consumer from post-industrial content forces a decision that a marketing percentage allows you to avoid, and it is precisely the distinction regulators and NGOs test first.

What about imported material?

Recyclate imported from outside the EU raises an evidence question rather than a legal one. The material is legitimate, and the certification schemes covering it vary in rigour and in whether they are recognised for the purpose of an EU target.

Where a target specifies post-consumer content, the practical difficulty is demonstrating that imported recyclate genuinely is post-consumer, since the collection and sorting system behind it may be informal and poorly documented. That is a supply chain evidence problem of exactly the kind the rest of the passport addresses.

Does recycled content always reduce impact?

Usually, and not automatically. Mechanical recycling of a clean stream is substantially less energy intensive than virgin production for most polymers and metals, and the reduction is real and well documented.

The exceptions arise where the recyclate requires extensive processing to reach usable quality, or where a lower-grade input shortens the product’s life. A recycled component that fails sooner and is replaced twice as often has not reduced anything, which is why recycled content and lifetime should be read together rather than separately.

What to do about it

Secure supply contractually before the target date rather than at it, since spot availability at deadline is exactly when the pool is tightest. Multi-year agreements with recyclers are the mechanism, and they require a volume commitment most buyers are reluctant to give.

Then evidence it properly from the start. Retrofitting chain of custody records to material already purchased is frequently impossible, and a claim you cannot evidence is worse than a lower claim you can.

Finally, decide what happens if the target is missed. Regulatory thresholds are not aspirational, and a product that cannot meet one cannot be placed on the market, which makes the contingency a commercial question rather than a compliance one.

The options are narrow and worth identifying early: reformulate the part so lower-grade recyclate is acceptable, redesign so the component carrying the requirement is smaller, or withdraw the product from the market it applies to. None of the three is quick, which is the whole argument for treating supply as a multi-year procurement problem rather than a compliance deadline.