ISO 9001 is about quality — consistently delivering products and services that meet customer requirements. ISO 27001 is about security — protecting information assets from threats. Different problems, different audiences, but both share the same ISO Annex SL management system structure, making integration straightforward.
Key differences side by side.
ISO 9001
ISO 27001
Focus area
Quality management
Information security management
Typical cost (AUD)
$5,500–$105,000
$12,000–$200,000
Typical timeline
3–12 months
6–18 months
Best suited for
Manufacturing, construction, engineering, professional services
IT services, SaaS, fintech, health tech, managed services
Primary industries
Manufacturing · Construction · Engineering · Professional services · Food production · Healthcare
IT services · SaaS · Fintech · Health tech · Managed services · Government
Key requirements
Risk-based thinking · Customer focus · Process approach · Documented QMS · Internal audits · Management review
ISMS scope definition · Risk assessment & treatment · Statement of Applicability · 93 Annex A controls · Continuous monitoring
Audit & renewal cycle
3-year certification · 2 annual surveillance audits
3-year certification · 2 annual surveillance audits
Integrates well with
ISO 14001, ISO 45001, ISO 27001
ISO 42001, ISO 9001, ISO 27701
Choose ISO 9001 if…
Choose ISO 27001 if…
Integration
Yes — and many IT services, engineering, and consulting firms hold both. The ISO Annex SL structure means 9001 and 27001 share identical clauses for context, leadership, planning, support, and improvement. An Integrated Management System (IMS) avoids duplicating documentation and audit effort. Expect to save 20–40% on combined audit costs vs certifying separately.
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 9001 Certification Cost
Price ranges by business size, consultant fees, audit costs
ISO 9001 Certification Timeline
Phase-by-phase breakdown from gap analysis to certificate
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
FAQ
Answers to the most common questions about choosing between these two standards.
ISO 9001 is about quality — consistently delivering products and services that meet customer requirements. ISO 27001 is about security — protecting information assets from threats. Different problems, different audiences, but both share the same ISO Annex SL management system structure, making integration straightforward.
It depends on what is driving your certification decision. If customers or procurement are asking for quality assurance, ISO 9001 is typically the answer. If you face obligations around information security management, ISO 27001 is more relevant. Many businesses start with one and add the second 12–24 months later as requirements evolve.
Yes — and many IT services, engineering, and consulting firms hold both. The ISO Annex SL structure means 9001 and 27001 share identical clauses for context, leadership, planning, support, and improvement. An Integrated Management System (IMS) avoids duplicating documentation and audit effort. Expect to save 20–40% on combined audit costs vs certifying separately.
Difficulty depends on your starting point. ISO 9001 costs $5,500–$105,000 and takes 3–12 months. ISO 27001 costs $12,000–$200,000 and takes 6–18 months. An organisation with mature quality management practices will find ISO 9001 straightforward, while one with immature information security management processes will face more work for ISO 27001.
Individually: $5,500–$105,000 for ISO 9001 and $12,000–$200,000 for ISO 27001. 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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