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Glossary

ISO 45001

Full name: ISO 45001, Occupational Health and Safety Management Systems — Requirements
ISO 45001 is the international standard for occupational health and safety management systems, published in 2018 to help organizations provide safe and healthy workplaces by preventing work-related injury and ill health while continually improving safety performance. It replaced the earlier OHSAS 18001 standard and follows the same Annex SL high-level structure shared with ISO 9001 and ISO 14001. 

Quick facts

Category Occupational health and safety management standard
Used by Manufacturing, construction, transport, energy, healthcare and other industries with workplace hazards
Also called OHSMS (Occupational Health and Safety Management System)
Related standards ISO 9001, ISO 14001, OSHA regulations
Related processes Safety incident management, risk assessment, internal audit, management review
Semantic match ISO 45001, occupational health and safety management, OHSMS certification, workplace safety standard

What is ISO 45001?

ISO 45001 provides a systematic framework for managing occupational health and safety risks, helping organizations move from reactive safety measures to proactive hazard identification and risk management.

The standard requires organizations to understand their context and worker needs, establish an occupational health and safety policy, identify hazards and assess risks, and implement controls to prevent work-related injury and illness while continually improving safety performance over time.

ISO 45001 replaced OHSAS 18001, with organizations previously certified to that standard required to migrate to ISO 45001 to maintain valid certification. It applies to organizations of any size, sector or geographic location, regardless of the specific risk level involved in their operations.

Why is ISO 45001 important?

A structured occupational health and safety management system reduces workplace injuries and illnesses by systematically identifying and controlling hazards before they cause harm, rather than only responding after an incident occurs.

ISO 45001 certification demonstrates to employees, customers and regulators that an organization takes a proactive, systematic approach to worker safety, which can also support recruitment and retention in industries with elevated safety risks.

Because the standard shares its structure with ISO 9001 and ISO 14001, organizations can integrate safety management with existing quality and environmental systems, streamlining audits and shared processes like document control.

How does ISO 45001 work?

ISO 45001's core requirements include:

  1. Context and worker participation. Understand organizational context and involve workers in the OHS system.
  2. OHS policy. Establish leadership commitment to occupational health and safety.
  3. Hazard identification and risk assessment. Identify hazards and assess associated risks.
  4. Planning and objectives. Set OHS objectives and plan actions to achieve them.
  5. Operational controls. Implement controls to eliminate or reduce identified risks.
  6. Incident investigation. Investigate incidents and take corrective action.
  7. Performance evaluation and improvement. Monitor, audit and continually improve OHS performance.

ISO 45001 vs. OSHA Compliance

Comparison ISO 45001 OSHA Compliance
Nature Voluntary international management system standard Legally mandated regulatory requirements
Scope Global, applicable in any country United States specific

Real-world examples of ISO 45001

A manufacturer implements ISO 45001 to formalize hazard identification across its production floor, systematically addressing risks before they result in workplace injuries.

A construction company pursuing ISO 45001 certification involves workers directly in hazard reporting and risk assessment, consistent with the standard's emphasis on worker participation.

A chemical processing facility integrates its ISO 45001 safety management system with its existing ISO 14001 environmental management system, sharing audit schedules and document control processes.

Regulations and standards related to ISO 45001

ISO 45001 does not replace occupational safety regulations, such as OSHA requirements in the United States, but provides a management system framework that helps organizations systematically manage compliance with those requirements alongside broader safety performance goals.

Organizations previously certified to OHSAS 18001 were required to migrate to ISO 45001 to maintain valid certification, with the formal transition period having concluded in prior years.

How QT9 helps with ISO 45001

QT9 QMS ISO 45001 capabilities

  • Automate incident reporting, audits and risk assessments.
  • Centralize safety documentation and reporting for consistent alignment.
  • Track trends, identify hazards and implement corrective actions faster.
  • Replace manual checklists and spreadsheets with a unified digital system.
  • Support OSHA and ISO 45001 compliance in one connected platform.
  • Make internal and external safety audits easier through automated scheduling and reporting.

Request a Safety Management Demo Explore ISO 45001 Compliance →

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Common mistakes with ISO 45001

Common mistakes include treating hazard identification as a one-time exercise during initial certification rather than an ongoing process as operations and conditions change.

Other problems include failing to genuinely involve workers in hazard reporting and risk assessment, missing valuable frontline insight the standard specifically emphasizes.

Frequently asked questions

ISO 45001 replaced OHSAS 18001, the previous widely used occupational health and safety management standard, with organizations required to migrate to ISO 45001 to maintain valid certification.
No. ISO 45001 certification is voluntary, chosen by organizations seeking independent confirmation that their occupational health and safety management system meets the international standard's requirements.
Yes. The standard applies to organizations of all sizes and sectors, regardless of geographic location or level of workplace risk, though the scale of implementation can be tailored accordingly.
The standard places specific emphasis on worker participation, requiring organizations to involve workers in hazard identification, risk assessment and the broader development of the occupational health and safety management system.
Yes. All three standards share the same Annex SL high-level structure, making it easier to integrate common processes such as document control, internal audit and management review across quality, environmental and safety management systems.
No. ISO 45001 provides a management system framework but does not replace legally mandated occupational safety regulations, such as OSHA requirements in the United States, which organizations must continue to meet separately.

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Last reviewed: July 21, 2026