PAS 2050

PAS 2050 (Publicly Available Specification 2050) is a British specification published by the British Standards Institution (BSI) in 2008 and revised in 2011. It provides a method for assessing the carbon footprint of a product across its full life cycle, from raw material extraction to end of life.

It was the first widely used product carbon footprint methodology and laid the groundwork for later standards. Today it has been largely superseded by ISO 14067 (published 2018), the international reference for product carbon footprint quantification, and by the GHG Protocol Product Standard. PAS 2050 is therefore best understood as a historical and transitional reference rather than the current best-practice standard.

Scope and key principles

• Cradle-to-grave approach: covers all stages, including raw material extraction, manufacturing, distribution, use and disposal.
• Common unit: results are expressed in kg CO2e per functional unit.
• Materiality threshold: allows the exclusion of life-cycle stages contributing very little to the total, within defined limits, to keep studies practical.
• Data period: requires primary data representative of at least 12 months of activity.

How it is applied

1. Define the functional unit and the system boundaries.
2. Collect activity data and emission factors (for example from Defra or IPCC datasets).
3. Compile the GHG inventory, covering the relevant Scope 1, Scope 2 and Scope 3 emissions.
4. Carry out internal review and, optionally, third-party verification.
5. Report or label the results, for example through a recognised carbon labelling scheme.

Strengths

• Pioneering framework: it established an early consensus on how to footprint products.
• Practicality: the materiality approach lets organisations focus on the most significant life-cycle stages.
• Compatibility: results can feed into ISO 14067 studies or Environmental Product Declarations (EPDs).

Limitations

• Not an ISO standard: most markets now expect ISO 14067 for international recognition.
• Ageing data and methods: emission factors and rules need regular updating.
• Comparability: different exclusion choices can make product comparisons less reliable.

If you are starting to measure the footprint of your products today, the recommended route is ISO 14067 or the GHG Protocol Product Standard rather than PAS 2050. At Manglai we help companies measure their carbon footprint and prepare their sustainability reporting. Discover how Manglai can help you.