Product Environmental Footprint (PEF): The EU's Methodology for Substantiating Green Claims

If the Green Claims Directive becomes law as expected, one methodology will dominate how businesses substantiate product-level environmental claims in the EU: the Product Environmental Footprint, or PEF. Developed by the European Commission's Joint Research Centre, PEF is designed to create a single, comparable way to measure the environmental impact of products across their entire lifecycle.

PEF isn't new — the pilot phase ran from 2013 to 2018. But it's been updated, refined, and is now positioned as the backbone of the EU's green claims verification infrastructure. Understanding PEF isn't optional anymore if you make product-level environmental claims to EU consumers.

What PEF Measures

Unlike a simple carbon footprint (which measures only greenhouse gas emissions), PEF evaluates environmental impact across 16 categories:

Impact Category	What It Measures	Unit
Climate change	Greenhouse gas emissions	kg CO₂ eq
Ozone depletion	Stratospheric ozone damage	kg CFC-11 eq
Human toxicity, cancer	Carcinogenic substance exposure	CTUh
Human toxicity, non-cancer	Non-carcinogenic substance exposure	CTUh
Particulate matter	Fine particle emissions	Disease incidence
Ionising radiation	Radioactive substance release	kBq U-235 eq
Photochemical ozone formation	Ground-level ozone creation	kg NMVOC eq
Acidification	Acid rain precursors	mol H+ eq
Eutrophication, terrestrial	Nutrient overload on land	mol N eq
Eutrophication, freshwater	Nutrient overload in lakes/rivers	kg P eq
Eutrophication, marine	Nutrient overload in oceans	kg N eq
Ecotoxicity, freshwater	Toxic impact on aquatic life	CTUe
Land use	Soil quality and biodiversity impact	Dimensionless (pt)
Water use	Water consumption and scarcity	m³ world eq
Resource use, fossils	Fossil fuel depletion	MJ
Resource use, minerals and metals	Mineral/metal depletion	kg Sb eq

This breadth is what distinguishes PEF from simpler carbon footprinting. A product might have a low carbon footprint but high water use or ecotoxicity. PEF captures trade-offs that single-metric approaches miss — and those trade-offs are exactly what regulators don't want hidden behind a simple "eco-friendly" label.

PEF vs. ISO 14040 LCA

Companies already doing Life Cycle Assessments per ISO 14040/14044 might wonder how PEF differs. The short answer: PEF is more prescriptive.

ISO 14040 LCA: Flexible framework. Practitioners choose system boundaries, allocation methods, data sources, and impact assessment methods. Results from two different LCA studies of the same product can vary dramatically depending on methodological choices.
PEF: Standardised rules. Where PEF Category Rules (PEFCRs) exist, they prescribe exactly how to handle allocation, what system boundaries to use, what data quality is required, and what functional unit to apply. Results should be comparable across studies.

The comparability is the key difference. ISO LCAs are valid evidence, but two companies doing ISO LCAs of similar products might get different results simply because they made different methodological choices. PEF eliminates that variability — at least within product categories where PEFCRs exist.

PEF Category Rules (PEFCRs)

PEFCRs provide product-category-specific guidance for conducting PEF studies. They're developed through multi-stakeholder Technical Secretariats involving industry, regulators, and LCA experts.

PEFCRs currently exist for:

Dairy products
Beer
Wine
Pet food
Feed for food-producing animals
Pasta
Packed water
Batteries (rechargeable)
IT equipment
Photovoltaic electricity generation
Thermal insulation
T-shirts
Footwear
Leather
Metal sheets
Decorative paints
Household liquid laundry detergent
Intermediate paper product

More PEFCRs are in development. The EU Commission plans to expand coverage to the majority of consumer product categories by 2030.

If a PEFCR exists for your product category, using it provides the strongest possible substantiation for environmental claims. If no PEFCR exists, a general PEF study following the PEF Guide (Commission Recommendation 2013/179/EU, updated) is the next best option.

Conducting a PEF Study: Practical Guide

Step 1: Define Goal and Scope

Identify the product, the functional unit (what the product delivers to the consumer), the reference flow (quantity of product needed to fulfil the functional unit), and the system boundaries (cradle-to-grave by default in PEF).

Step 2: Inventory Analysis

Collect data on all inputs (materials, energy, water) and outputs (products, emissions, waste) across the product lifecycle. PEF distinguishes between:

Company-specific data: Measured directly from your operations. Required for foreground processes (those under your control).
Secondary data: From LCA databases (ecoinvent, GaBi, Agri-footprint). Acceptable for background processes (upstream supply chain, energy generation).

Step 3: Impact Assessment

Calculate environmental impacts across all 16 categories using the prescribed impact assessment method (EF 3.1 method). This converts inventory data (kg of CO₂ emitted, litres of water used) into impact scores.

Step 4: Interpretation

Identify the most significant impact categories, lifecycle stages, and processes. A sensitivity analysis tests how results change when key assumptions vary.

Step 5: Verification

For consumer-facing claims, third-party verification by an accredited body is expected to be mandatory under the Green Claims Directive. Even without that requirement, verified PEF results carry significantly more weight with regulators.

Costs and Timelines

A realistic assessment of PEF study costs:

Study Type	Typical Cost	Timeline
Screening PEF (simplified)	€5,000 – €15,000	4-8 weeks
Full PEF with PEFCR	€15,000 – €40,000	3-6 months
Full PEF without PEFCR	€20,000 – €50,000	4-8 months
PEF + third-party verification	+€5,000 – €10,000	+4-8 weeks

Costs vary significantly based on product complexity, supply chain transparency, and data availability. A simple consumer product with well-documented suppliers costs less than a complex electronic device with a global supply chain.

PEF and the Green Claims Directive

The proposed Green Claims Directive references PEF as the preferred methodology for product-level environmental claims. While the final text may offer some flexibility, the direction is clear: PEF or PEF-equivalent methodologies will be the standard for substantiation.

Companies that invest in PEF studies now will be ahead of the curve when the directive enters force. Those that wait may face a bottleneck — LCA consultancies are already reporting capacity constraints as demand for PEF studies increases.

For a quick assessment of your current product claims against ECGT requirements, use our Green Claims Scanner.