ISO 45001 occupational health and safety is the international standard for managing workplace health and safety risks. It gives organisations a framework to prevent work-related injury and ill health, engage workers, and continually improve safety performance. An ISO 45001 occupational health and safety management system replaced the old OHSAS 18001 and aligns safety with the same modern structure as ISO 9001 and ISO 14001. This guide covers what it is, how it works, and how to get certified.
What is ISO 45001?
ISO 45001:2018 specifies the requirements for an occupational health and safety management system. Published in 2018, it replaced the older OHSAS 18001 standard (which was formally withdrawn). It provides a framework to systematically identify hazards, control risks, meet legal obligations, and continually improve safety performance — and, crucially, it puts worker participation at the heart of the system.
Why ISO 45001 occupational health and safety matters
- Fewer incidents. A proactive OH&S system reduces injuries, ill health, and the costs that follow.
- Legal confidence. It helps you identify and meet your health-and-safety legal obligations.
- Reputation and contracts. Many clients and tenders now require certified safety management.
- Engaged workforce. Its emphasis on consultation builds a stronger safety culture.
Who is ISO 45001 for?
Any organization with workers, in any sector or size — from construction and manufacturing to offices and services. Wherever people work, there are hazards to manage.
How the standard is structured
ISO 45001 uses the same Harmonized Structure (Clauses 4–10) as ISO 9001 and ISO 14001, so it integrates cleanly with other management systems, and it runs on the Plan-Do-Check-Act cycle:
- Context & interested parties (Clause 4)
- Leadership & worker participation (Clause 5)
- Planning — hazards, risks, legal requirements, objectives (Clause 6)
- Support — resources, competence, communication (Clause 7)
- Operation — controls, change management, emergency preparedness (Clause 8)
- Performance evaluation (Clause 9) and Improvement (Clause 10)
What makes ISO 45001 distinctive: worker participation
Unlike a purely top-down system, ISO 45001 requires meaningful consultation and participation of workers at all levels. Safety decisions can’t just be handed down — the people exposed to hazards must have a voice. We cover this in our guide to worker participation and consultation.
Skip the blank page.
The ISO 45001 Toolkit gives you every OH&S document — the safety policy, hazard identification and risk assessment templates, legal register, objectives, and procedures — as fully editable, auditor-written files mapped to ISO 45001:2018.
Hazard identification and risk assessment
The engine of any OH&S system is spotting hazards before they cause harm and controlling the associated risks. ISO 45001 expects a proactive, ongoing process — explained in our guide to hazard identification and risk assessment.
The documentation you’ll need
ISO 45001 requires a defined set of documents and records — policy, risk methodology, legal register, objectives, and more. See the full list in the complete documentation checklist.
Getting certified
Certification follows the familiar route: build the system, operate it, run an internal audit and management review, then pass a two-stage external audit. We walk through it in our guide to the ISO 45001 certification process.
Migrating from OHSAS 18001
If you remember OHSAS 18001, ISO 45001 will feel familiar but broader. We explain what changed in our ISO 45001 vs OHSAS 18001 comparison.
Who needs ISO 45001 occupational health and safety
ISO 45001 occupational health suits any organisation with workers exposed to risk — virtually all of them, from construction and manufacturing to offices and healthcare. It is often driven by client requirements, tender prequalification, or a desire to reduce incidents and insurance costs, but the deeper value is fewer injuries and a stronger safety culture. The standard is published by ISO, and certification by an accredited body shows workers, clients, and regulators that safety is managed systematically rather than left to chance.
How to get started
The quickest path is to begin from a complete OH&S document set — policy, hazard and risk templates, legal register, and procedures — then tailor it to your workplace and activities.
Skip the blank page.
The ISO 45001 Toolkit gives you every OH&S document — the safety policy, hazard identification and risk assessment templates, legal register, objectives, and procedures — as fully editable, auditor-written files mapped to ISO 45001:2018.