Product carbon footprint
The product carbon footprint is the sum of the greenhouse gas emissions attributable to a single product across defined life cycle stages, expressed in CO₂ equivalents and calculated in line with ISO 14067 or the GHG Protocol Product Standard.
The product carbon footprint (PCF) quantifies the greenhouse gas emissions attributable to one specific product or service along the life cycle under consideration – from raw material extraction through intermediate goods, manufacturing and distribution to the use phase and end of life. Unlike the corporate carbon footprint, which captures an organisation's emissions over a reporting year, a PCF always relates to a functional or declared unit such as "one kilogram of granulate" or "one 500 ml pack". Results are reported in CO₂ equivalents so that methane, nitrous oxide and fluorinated gases become comparable through their global warming potentials, normally taken from the current IPCC assessment report over a 100-year time horizon.
Two frameworks dominate the methodology. ISO 14067:2018 specialises the life cycle assessment standards ISO 14040 and ISO 14044 for products and sets out the requirements for quantification and reporting, while the GHG Protocol Product Life Cycle Accounting and Reporting Standard offers a widely used parallel approach. Both demand explicit decisions on system boundaries, allocation rules, data quality and cut-off criteria. In practice companies distinguish "cradle-to-gate" studies, which stop at the factory gate and are typical for intermediate goods in business-to-business supply chains, from "cradle-to-grave" studies that include use and disposal. Sector-specific product category rules – EN 15804 for construction products or the WBCSD PACT framework for exchanging footprint data along value chains – add the detail that makes supplier figures genuinely comparable and additive.
Regulatory relevance is growing quickly. ESRS E1 under the CSRD mandates organisational rather than product emissions, yet reliable PCF data is in practice the only way to calculate Scope 3 categories such as purchased goods or the use of sold products with any rigour. Regulation (EU) 2023/1542, the EU Battery Regulation, foresees a mandatory carbon footprint declaration for certain battery categories, but the actual application dates depend on delegated acts and have been postponed repeatedly, so as of August 2026 they should not be treated as settled. The Ecodesign for Sustainable Products Regulation (EU) 2024/1781 may likewise require climate footprint information in the digital product passport through product-group specific acts. Marketing a low PCF as a "climate neutral product" is legally risky: Directive (EU) 2024/825 on empowering consumers for the green transition bans neutrality claims based solely on offsetting from 27 September 2026.
Legal Basis
ISO 14067:2018; GHG Protocol Product Life Cycle Accounting and Reporting Standard; ISO 14040/14044; ESRS E1; Regulation (EU) 2023/1542 (Battery Regulation), Art. 7; Regulation (EU) 2024/1781 (ESPR); Directive (EU) 2024/825
Practical Example
A manufacturer of plastic components is asked by an automotive customer to supply an ISO 14067 product carbon footprint for twelve parts. The sustainability manager first defines the declared unit for each part and selects a cradle-to-gate boundary including transport to the customer plant, as required by the customer's product category rules. Primary data on electricity, gas and material consumption comes from the ERP and energy management systems, upstream processes are covered by secondary datasets from a recognised life cycle inventory database, and the share of primary data is documented. Because the customer insists on a third-party verified figure, a critical review to ISO 14071 is commissioned. Assumptions, allocation rules and emission factors are stored under version control so the values can be reproduced next year and fed into the company's own Scope 3 inventory.