ISO 20400: A Global Standard for Sustainable Procurement

Background

Procurement can create environmental and social impacts far beyond an organization’s own operations. Purchasing decisions can influence resource consumption, greenhouse gas emissions, working conditions, human rights, supplier practices and the communities in which supply chains operate. ISO 20400 was developed to provide organizations with a common international framework for incorporating these considerations into procurement.

Published in 2017, ISO 20400 was the first international standard specifically dedicated to sustainable procurement. Rather than establishing a separate sustainability management system, it provides guidance that can be incorporated into an organization’s existing procurement policies and processes.

The standard draws substantially on ISO 26000:2010 – Guidance on social responsibility. It translates many of ISO 26000's sustainability principles and subjects into the procurement context, helping organizations extend their sustainability objectives into their purchasing decisions and supply chains.

Key Provisions

ISO 20400 approaches sustainable procurement as more than simply purchasing environmentally preferable products. Organizations are encouraged to consider sustainability throughout procurement strategy, policy and individual purchasing processes. Key areas include:

• Embedding sustainability into procurement strategy: Organizations should align procurement objectives with their wider sustainability priorities and establish appropriate governance, responsibilities and policies.

• Identifying sustainability risks and opportunities: Procurement decisions should consider relevant environmental, social and economic impacts and prioritize issues according to their significance.

• Managing suppliers and supply chains: Sustainability considerations can be incorporated into supplier selection, specifications, contracts, supplier engagement and performance management.

• Considering life-cycle impacts: Purchasing decisions should consider relevant impacts associated with goods and services beyond their initial purchase, rather than focusing solely on price.

• Integrating sustainability into procurement processes: Sustainability considerations should be incorporated from planning and specification through supplier selection, contract management and review.

Current Status

ISO 20400:2017 underwent a systematic review in 2022 and was formally confirmed by ISO in April 2023. The 2017 edition therefore remains the current version as of September 2026. The standard may be increasingly relevant to companies competing for public contracts. Governments are making greater use of procurement to pursue environmental and wider sustainability objectives; all OECD countries responding to a 2024 survey reported incorporating environmental objectives into their procurement policy frameworks, while more than two-thirds had quantitative green procurement targets. Companies that supply the public sector may therefore want to use ISO 20400 as a framework for strengthening their sustainable procurement practices and demonstrating a systematic approach to sustainability within their own supply chains.