PCF vs LCA: When Do You Need Which?
A client asked for a “life cycle assessment,” but the email talks about carbon footprint. Or internally you need to decide whether a single CO2 figure is enough or whether it is worth doing a broader analysis from the outset. This article compares the content, costs, and use cases of Product Carbon Footprint (PCF) and Life Cycle Assessment (LCA).
Short answer: PCF measures climate impact, LCA measures the full environmental profile
PCF (Product Carbon Footprint) is a single number: how many greenhouse gas emissions does a product cause over its lifetime, expressed in CO2 equivalents. The standard is ISO 14067:2018.
LCA (Life Cycle Assessment) measures multiple environmental impact categories, of which climate change is just one. The standards are ISO 14040 and ISO 14044.
In practice, PCF is a subset of LCA. Both can be produced from the same data collection, but LCA requires more data types and deeper modelling.
What PCF covers: ISO 14067 and GWP
ISO 14067 defines the calculation of a product’s carbon footprint. The result is expressed as GWP100 values (Global Warming Potential over a 100-year time horizon), in CO2 equivalents per functional unit. GWP factors come from the latest IPCC report, typically AR5 or AR6.
Key elements of a PCF:
- Functional unit: the unit to which emissions are related (e.g. 1 kg of product, 1 m² of coating, 1 year of use). A good functional unit describes the function the product provides, not just a quantity.
- System boundary: which lifecycle stages are included. The most common boundaries are cradle-to-gate (raw materials to factory gate) and cradle-to-grave (raw materials to end of life).
- Allocation: if the same process produces multiple products, emissions are distributed between them based on, for example, mass, energy content, or economic value.
- Treatment of biogenic carbon: how the carbon cycle of wood-based and biological materials is accounted for. ISO 14067 requires separate reporting of biogenic carbon.
- Data quality assessment: the representativeness of each input is documented (time period, geography, technology, precision).
PCF is lighter than LCA because it does not require characterisation models for other impact categories. The data collection effort focuses on energy, materials, and transport. The result is a single headline figure (CO2-eq per unit) that is easy to communicate and compare.
A PCF can also be produced and communicated without external verification. The standard only requires a critical review if the result is communicated publicly with comparative assertions.
What LCA covers: ISO 14040/14044 and impact categories
LCA assesses a product’s environmental impacts as a whole. Typical impact categories:
- Climate change (GWP): the same as PCF.
- Acidification (AP): acid rain.
- Eutrophication (EP): nutrient loading of water bodies and soil.
- Ozone depletion (ODP): thinning of the stratospheric ozone layer.
- Photochemical ozone formation (POCP): tropospheric ozone (“summer smog”).
- Abiotic resource use (ADP): fossil fuels and minerals.
- Water and land use indicators and toxicity categories as required.
LCA follows the four-phase framework of ISO 14040: goal and scope definition, life cycle inventory analysis (LCI), life cycle impact assessment (LCIA), and interpretation. Each phase must be documented and reproducible.
LCA is more expensive and time-consuming than PCF because the required databases are more extensive, there are more impact assessment models, and the report is more multi-layered. On the other hand, LCA reveals trade-offs that PCF would leave unseen, for example when the carbon footprint decreases but water body loading increases.
A typical trade-off example: when switching from a fossil-based material to a bio-based one, the carbon footprint decreases, but land use and eutrophication may increase. PCF shows the gain; LCA reveals the full picture. This is why LCA is generally the safer choice in analyses that guide product development.
Decision table: which to use in which situation
| Situation | PCF | LCA |
|---|---|---|
| Customer’s Scope 3 calculation | x | |
| Marketing with a single CO2 figure | x | |
| Product development where burden-shifting between categories must be avoided | x | |
| As the basis for an EPD | x | |
| Public procurement requesting a “life cycle assessment” | x | |
| Construction product, environmental declaration compliant with EN 15804 | x (as part of EPD) | |
| Internal decision-making, first product-specific data point | x | |
| Competitive situation where other products are compared using LCA | x |
The rule that works in most cases: if a customer asks for a carbon footprint, do a PCF. If a customer asks for an environmental product declaration or life cycle assessment, do an LCA (and most likely an EPD).
The comparison between carbon footprint and EPD is covered in its own article: Carbon Footprint or EPD.
Cost, timeline, and data requirements
PCF is typically cheaper and faster. A PCF for a simple product can be completed in 6–12 weeks if data collection goes smoothly. Costs range from a few thousand to around twenty thousand euros depending on the complexity of the product.
LCA takes 10–20 weeks and costs more because:
- Characterisation of more impact categories requires additional work.
- Database licences and modelling work are more extensive.
- Interpretation of results is more multi-layered (e.g. sensitivity analyses).
EPD adds PCR compliance, a standardised report format, verification, and programme operator publication fees on top of the LCA. The timeline is typically 4–8 weeks longer than a standalone LCA.
The good news is that a PCF can be expanded into an LCA later, if the data collection is planned more broadly from the outset. This is a common approach: do the PCF now, collect the LCA data foundation at the same time, and add the LCA or EPD when the need arises. The details of the ISO 14067 process are covered in the article ISO 14067 Process in Practice.
Frequently asked questions
Can you do a PCF first and expand it into an LCA later?
Yes. The same data collection serves both, if it is planned more broadly from the start. In practice, the recipe, energy, and transport data collected for a PCF are directly usable for an LCA. The additional work focuses on impact assessment, not data collection.
Is ISO 14067 at the same level as ISO 14044?
They operate at different levels but are compatible. ISO 14040 and 14044 define the general principles of life cycle assessment. ISO 14067 builds on these and specifies how the same methodology is applied when only the carbon footprint is being examined.
Can an EPD be based on a PCF?
Not directly. An EPD requires an LCA covering the full range of impact categories and compliance with the product category-specific PCR. The PCF data foundation is a good starting point, but an EPD requires additional work in impact assessment and report format.
What if a customer demands an “LCA” but means carbon footprint?
Review the requirement before placing the order. Ask which impact categories must be included in the report and which standard it should be based on. If the answer is “CO2 alone is sufficient,” PCF is the right choice and saves time and money. If the answer is vague, recommend a PCF and agree on expansion as needed.
Which takes more time: PCF or LCA?
LCA takes more time. PCF typically 6–12 weeks, LCA 10–20 weeks. The differences are greatest in the reporting and interpretation phase.
Can a PCF be used for communication and marketing?
Yes, if it has been produced in accordance with the standard and the assumptions are documented. In public communications that present comparative assertions (e.g. “our product is x % lower-emission than a competitor’s”), ISO 14067 requires a critical review. For internal use, customer communications, and tender materials, a PCF alone is usually sufficient.
What is the difference between PCF calculation and Scope 3 calculation?
Scope 3 is calculated at company level and covers all emissions across a company’s value chain (15 categories). PCF is calculated at product level and concerns only the lifecycle of a single product. A product’s PCF can be used as input into a customer’s Scope 3 calculation (in the customer’s category of “purchased goods and services” or “use of sold products”).
Not sure which one you need?
We will review your situation in 30 minutes and tell you whether a PCF is sufficient or whether an LCA is worth doing. No commitment required. Send us the client’s original request and we will tell you directly: standard, timeline, and budget.
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