Packaging Emissions Are Missing From Most PCF Reports — How to Find, Calculate, and Include Them Correctly Under ISO 14067

Your Product Carbon Footprint has a hole in it. And there is a reasonable chance you have not noticed.

Walk through a typical manufacturer's PCF report. Raw materials — included. Manufacturing energy — included. Upstream transportation of components — included. Packaging — described as "not material" in a footnote, estimated with a rough spend-based figure, or left out entirely without any justification statement.

That omission is a problem. Under ISO 14067 and the GHG Protocol Product Standard, packaging is generally considered part of the product system boundary in many cradle-to-gate and cradle-to-grave assessments. It should either be included in the calculation or, if excluded, clearly justified and documented within the system boundary definition. Getting this wrong can be a common point of scrutiny during customer reviews, third-party verification, and regulatory or procurement checks.

This post covers what ISO 14067 actually requires on packaging, how primary, secondary, and tertiary packaging are defined and treated, how to calculate packaging emissions at each lifecycle stage, how to handle recycled content and end-of-life allocation correctly, and the three errors that most often cause PCF reports to fail customer review or third-party verification.

ISO 14067:2018 is the international standard for quantifying and reporting the carbon footprint of products. It specifies that a PCF study must define a system boundary, and that all life cycle stages and processes that can significantly influence the carbon footprint must be considered within that boundary.

The boundary determines which unit processes are included. All life-cycle stages and processes that can significantly influence the CFP must be considered.

All significant greenhouse gas emissions must be included unless exclusions are clearly justified.

Exclusions are only permitted if they do not significantly change the overall conclusions of the PCF. Any exclusions must be clearly stated and reported as part of the PCF, along with the threshold that has been used to determine whether an emissions source is significant — known as the significance threshold.

Packaging is a material input to the product system. It is purchased, manufactured from raw materials, transported to your facility, and incorporated into the product as it leaves your gate. It therefore falls inside the system boundary of a cradle-to-gate PCF — the most common boundary used by manufacturers supplying B2B customers.

The standard requires clear documentation of system boundary decisions and justification for any exclusions of life cycle stages or processes.

The critical nuance is this: ISO 14067 does not state that packaging must always be included regardless of its contribution. For some product categories — particularly bulk chemicals delivered in large quantities — packaging contribution to the PCF can be negligible, and its exclusion is acceptable provided it is visible in the description of the declared unit and reported separately.

The rule is therefore: packaging is inside your boundary and must be assessed. If you include it, calculate it correctly. If you exclude it, you must set a significance threshold, demonstrate that packaging emissions fall below it, and document that decision explicitly. What you cannot do is simply leave it out without any acknowledgement.

Most manufacturer PCF reports do not include the significance threshold test. They leave packaging out without measuring whether it qualifies for exclusion. That is the gap this blog addresses.

Understanding which packaging belongs in your PCF requires distinguishing between the three levels that every supply chain uses. They sit at different points in the lifecycle and are treated differently depending on your system boundary.

The allocation approach you choose for secondary and tertiary packaging must be documented in your methodology statement with the justification for why that parameter was selected over alternatives.

There are four distinct emission sources that packaging contributes to a PCF. Each is handled differently.

This is where most packaging emissions sit. The carbon intensity of producing corrugated board, polyethylene terephthalate (PET), high-density polyethylene (HDPE), aluminium foil, glass, polypropylene (PP), or any other packaging material is captured using material-level emission factors from recognised lifecycle databases.

For raw materials, record the type, weight, and source of every packaging component including primary packaging materials, secondary packaging materials such as shrink wrap, labels, and adhesives, and tertiary packaging such as pallets and stretch wrap. Key emission factor databases include ecoinvent, which covers over 18,000 datasets, GaBi, DEFRA's annually updated UK government factors, and the US EPA.

The calculation is: mass of each packaging component in kilograms multiplied by the emission factor for that material in kg CO₂e per kilogram of material. Every component — box, label, adhesive, foam insert, inner liner, desiccant pouch — must appear as a line item. The challenge is data collection, not the arithmetic. Manufacturers rarely have complete packaging specifications documented in their bill of materials. Gathering the weight and material composition of every packaging component per functional unit of product is usually the longest single step in the packaging calculation.

Emission factors vary significantly by dataset, geography, and methodology. For instance, aluminium production carries significantly higher emission intensity than corrugated board, and virgin plastic sits between them.These differences mean that the same physical weight of aluminium packaging and cardboard packaging carry very different carbon numbers. A spend-based estimate that treats all packaging as a single category will systematically over or understate the actual figure depending on your packaging mix.

If you produce your own packaging in-house, the electricity and fuel consumed belong in your own Scope 1 and 2 emissions and are already captured in your gate-to-gate operational inventory. If you purchase packaging from a supplier — which is the case for most manufacturers — the upstream manufacturing energy is embedded in the emission factor for the packaging material from your database.

This can help avoid double counting if datasets are used consistently, but it means your emission factor selection must reflect how and where your packaging is actually produced. A corrugated board box manufactured in a country with a high-carbon electricity grid has a meaningfully higher upstream emission factor than the same box produced in a country with predominantly renewable generation. Where your emission factor database provides regionally differentiated values — and ecoinvent and DEFRA both do — use the regional variant that matches your packaging supplier's location, not a global average.

This is an upstream Scope 3 transport emission that belongs inside your cradle-to-gate PCF boundary. It is often omitted in practice.

Calculate it using: the weight of the packaging materials received per functional unit of product, multiplied by the distance from your packaging supplier's facility to your manufacturing site, multiplied by a transport mode emission factor. The ISO 14083 standard provides a structured methodology for transport emissions accounting for logistics emissions calculations and is recommended alongside ISO 14067 for this stage.

The transport contribution of packaging materials is typically modest — can be relatively small but varies significantly depending on distance and transport mode. It is not always the difference between a good PCF and a bad one. But it is part of the system boundary, and excluding it without noting it as a significance threshold decision is a gap that verifiers will flag.

For a cradle-to-grave PCF, the disposal or recovery of packaging material at end-of-life must be included. The emission factor applied depends on the actual end-of-life pathway in the market where the product is sold — landfill, incineration, mechanical recycling, composting, or a combination — weighted by regional infrastructure rates. Applying a single global recycling rate when most of your product is sold in markets with low packaging recovery infrastructure will overstate the end-of-life benefit.

For a cradle-to-gate PCF, end-of-life is typically outside the boundary unless required by PCR or study goal — the typically the manufacturer’s production gate, and downstream disposal occurs after your product has left. This stage does not need to be calculated for cradle-to-gate studies, but the boundary must be clearly stated so readers understand what is and is not included.

This is where most manufacturer PCF calculations introduce their most significant methodological error. ISO 14067 requires a documented decision on how recycled content is handled, and switching approaches between reports without explanation is a red flag during any verification.

When packaging material contains recycled content — recycled cardboard, post-consumer recycled PET, recycled aluminium — the question is how to account for the emissions associated with that material and what credit, if any, flows from end-of-life recycling.

ISO 14067's Annex D describes several approaches. Under the cut-off method, recycled material enters the system burden-free — the original product gets no credit for its recyclability, and the next product benefits from using recycled content. Under the avoided burden approach, the original product gets credited for its recycling potential, while recycled content carries the burden of the virgin production it avoided.

The cut-off approach, sometimes called the recycled content approach or the 100:0 method, accounts for no impacts or avoided impacts beyond the boundary of the product lifecycle. Impacts of primary material production are allocated to the product where the primary material is used. If a material is recycled, the primary producer does not receive any credit for providing recyclable materials — recyclable materials are available burden-free to recycling processes, and secondary materials bear only the impacts of the recycling processes themselves.

In practice under the cut-off method: if your packaging uses 70% post-consumer recycled corrugated board, you apply only the emission factor for the 30% virgin content plus the energy consumed in processing recycled fibre into board — not the full virgin corrugated board emission factor. The saving is real and measurable, which is precisely why documenting the method and the recycled content percentage is important. Reviewers will ask.

If you claim credits for recycling at end-of-life, base them on plausible collection and sorting rates for your actual markets, not ideal-world assumptions. A cradle-to-grave PCF that assigns full recycling credit to packaging disposed of in markets where packaging collection rates are low cannot be substantiated under verification.

The method you choose must be stated explicitly in your PCF methodology document. It should also be consistent with the method used for recycled content in the product's other material inputs — using cut-off for raw materials but avoided burden for packaging within the same PCF introduces inconsistency that verifiers will question.

Spend-based estimation applies the financial cost of your packaging to a sector-level emission factor for "packaging manufacturing". This is fast and requires almost no data. It is also the calculation approach that most reliably produces a number that cannot survive scrutiny.

The fundamental problem is that spend-based factors are averages across entire industry sectors. They do not distinguish between cardboard, rigid plastic, flexible film, glass, or aluminium. A corrugated board outer carton and an aluminium blister tray may cost similar amounts per unit but have dramatically different emission intensities per kilogram of material. Using the same sector average for both systematically misstates your packaging emissions — in either direction — depending on your specific packaging mix.

Spend-based estimation is accepted under the GHG Protocol as a screening-level method for unknown quantities where primary data is unavailable. It is not an acceptable method for packaging when the weight and material composition of your packaging components are knowable — which they always are for a manufacturer with a defined product specification.

This is the most structurally common error in manufacturer PCF reports. The retail or delivery box is included because it is visible and easily measured. The outer shipper carton and pallet wrap are excluded as "logistics costs" rather than product emissions.

Under ISO 14067, secondary and tertiary packaging that leaves your facility with the product and is attributable to the production of that product is inside the cradle-to-gate system boundary. Excluding it requires demonstrating that it is below your significance threshold — which requires measuring it first. If the measurement shows it is genuinely negligible (for example, a pallet of bulk steel components where the pallet weight per unit is tiny relative to the component weight), the exclusion is defensible. If the measurement shows it represents a meaningful percentage of total packaging emissions, it cannot be excluded without distorting the PCF.

The practical step: inventory every packaging component that leaves your facility with every unit of the product, including the shipper case, the inner dividers, the foam corner protectors, the outer wrap, and the fractional share of the pallet and stretch wrap. Measure the weight of each. Then decide what to include and what to exclude based on significance — not based on what is convenient to collect data for.

For cradle-to-grave assessments, assigning all packaging to a single end-of-life scenario — typically either all landfill or all recycling — when the actual disposal mix is different significantly distorts the packaging contribution to the total PCF.

The emission factor for landfilling corrugated board is different from the factor for recycling it. The same is true for each packaging material. For products sold across multiple markets with different waste infrastructure maturity, a single global end-of-life assumption is not accurate.

The correct approach is to use market-specific end-of-life data — the actual packaging recycling and recovery rates in the primary markets where the product is sold — to build a weighted end-of-life scenario. Most national environmental agencies publish annual packaging recovery rates by material type. DEFRA publishes them for the UK annually. Eurostat publishes them for EU member states. These are public, accessible, and the sources verifiers will expect you to reference.

Using the most optimistic scenario — 100% recycling — when the product is sold in markets where packaging recovery infrastructure is limited is a greenwashing risk under the EU Green Claims Directive, the Empowering Consumers for the Green Transition Directive (ECGT), which applies from September 2026, and which requires that environmental claims be substantiated by verifiable data reflecting actual conditions.

Correct packaging emissions calculation depends on data that most sustainability teams do not currently hold. Gathering it before beginning the calculation is what separates a PCF that survives review from one that does not.

A PCF report that handles packaging correctly includes a line-by-line inventory of all packaging components, with the weight per functional unit, material composition, emission factor used, the database and version from which the factor was taken, and the method applied for any recycled content. The report states explicitly whether tertiary packaging is included or excluded, and if excluded, it documents the significance threshold that was applied and provides the quantified estimate demonstrating the excluded emissions fall below it.

The summary covers the method, boundary, functional unit, data sources, totals in kg CO₂e per functional unit, and a breakdown by lifecycle stage. All assumptions and uncertainties are explained. The same functional unit is maintained in any comparison, and the report is clear about what is in and out of scope.

The standard requires clear documentation of system boundary decisions, justification for any exclusions of life cycle stages or processes, and consistency in applying system boundaries when comparing products.

The packaging line does not need to dominate your PCF. For most industrial manufacturers producing metal components, machinery, or electronics, packaging will contribute a small share of the total cradle-to-gate footprint. But it needs to be a real number, derived from real material data, calculated with an appropriate emission factor, handled through a documented method for any recycled content, and justified if excluded. A footnote saying "not material" with no threshold test behind it does not meet that standard.

Packaging emissions matter for three reasons that extend beyond the PCF itself.

The fix is not technically complex. It requires collecting packaging specifications your procurement team already holds, applying material emission factors that are publicly available in open databases, and documenting the decisions you make about what to include and why. That work, done once for each product, closes one of the most consistent gaps in manufacturer PCF reports and produces a number that stands up to the level of scrutiny that supply chain carbon reporting is now operating under.