ISO 27001 addresses digital risks — data security, cyber threats, unauthorised access. ISO 45001 addresses physical risks — worker health, safety hazards, incident prevention. Different risk domains, but both are risk-based management systems using the same Annex SL high-level structure. Large organisations with both significant IT operations and physical workforces sometimes hold both.
Key differences side by side.
ISO 27001
ISO 45001
Focus area
Information security management
Occupational health & safety
Typical cost (AUD)
$12,000–$200,000
$6,500–$108,000
Typical timeline
6–18 months
3–12 months
Best suited for
IT services, SaaS, fintech, health tech, managed services
Construction, mining, manufacturing, field services
Primary industries
IT services · SaaS · Fintech · Health tech · Managed services · Government
Construction · Mining · Manufacturing · Field services · Utilities · Transport
Key requirements
ISMS scope definition · Risk assessment & treatment · Statement of Applicability · 93 Annex A controls · Continuous monitoring
Hazard identification & risk controls · Worker participation · Incident investigation · Legal compliance register · Management of change
Audit & renewal cycle
3-year certification · 2 annual surveillance audits
3-year certification · 2 annual surveillance audits
Integrates well with
ISO 42001, ISO 9001, ISO 27701
ISO 9001, ISO 14001
Choose ISO 27001 if…
Choose ISO 45001 if…
Integration
Seen in mining companies with large IT teams, utilities with both data centres and field workforces, and digital-first construction businesses. Both standards use the Annex SL structure — context, leadership, planning, support, and improvement are shared. Integration reduces documentation duplication and audit cost. More commonly both appear alongside ISO 9001 in a full IMS.
Shared framework
Annex SL structure is identical across both standards
Combined audits
Certification bodies offer combined surveillance and recertification audits
Lower total cost
Integrated approach saves 20–40% vs certifying each standard separately
ISO 27001 Certification Cost
Price ranges by business size, consultant fees, audit costs
ISO 27001 Certification Timeline
Phase-by-phase breakdown from gap analysis to certificate
ISO 45001 Certification Cost
Price ranges by business size, consultant fees, audit costs
ISO 45001 Certification Timeline
Phase-by-phase breakdown from gap analysis to certificate
FAQ
Answers to the most common questions about choosing between these two standards.
ISO 27001 addresses digital risks — data security, cyber threats, unauthorised access. ISO 45001 addresses physical risks — worker health, safety hazards, incident prevention. Different risk domains, but both are risk-based management systems using the same Annex SL high-level structure. Large organisations with both significant IT operations and physical workforces sometimes hold both.
It depends on what is driving your certification decision. If customers or procurement are asking for quality assurance, ISO 27001 is typically the answer. If you face obligations around occupational health & safety, ISO 45001 is more relevant. Many businesses start with one and add the second 12–24 months later as requirements evolve.
Seen in mining companies with large IT teams, utilities with both data centres and field workforces, and digital-first construction businesses. Both standards use the Annex SL structure — context, leadership, planning, support, and improvement are shared. Integration reduces documentation duplication and audit cost. More commonly both appear alongside ISO 9001 in a full IMS.
Difficulty depends on your starting point. ISO 27001 costs $12,000–$200,000 and takes 6–18 months. ISO 45001 costs $6,500–$108,000 and takes 3–12 months. An organisation with mature information security management practices will find ISO 27001 straightforward, while one with immature occupational health & safety processes will face more work for ISO 45001.
Individually: $12,000–$200,000 for ISO 27001 and $6,500–$108,000 for ISO 45001. With an integrated approach — shared consultant, combined audit cycles — you can typically reduce the total by 20–35%. Getting itemised quotes from providers experienced with integrated management systems is the best way to understand your combined cost.
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