GreenSuppliers
Guide28 February 2026

ISO 14001 Certification: What Suppliers Need to Know

A step-by-step guide to achieving ISO 14001 environmental management certification and how it impacts your ESG score.

What Is ISO 14001?

ISO 14001 is the international standard for environmental management systems. It helps organisations systematically manage their environmental impact, reduce waste, and improve sustainability performance.

Why ISO 14001 Matters for Suppliers

For suppliers looking to work with enterprise buyers, ISO 14001 certification is increasingly a baseline requirement. It demonstrates your commitment to environmental management and can significantly improve your ESG score on platforms like Green Suppliers.

Benefits

  • Improved credibility with enterprise procurement teams
  • Higher ESG score on Green Suppliers (contributes to Silver tier and above)
  • Compliance with environmental regulations
  • Reduced costs through better resource management

The Certification Process

  1. Gap analysis — Assess current practices against ISO 14001 requirements
  2. EMS development — Design and document your environmental management system
  3. Implementation — Put the EMS into practice
  4. Internal audit — Verify compliance internally
  5. Certification audit — External assessment by an accredited body
  6. Surveillance audits — Annual checks to maintain certification

Ready to improve your ESG score? Get listed on Green Suppliers and showcase your certifications.