Two standards, one structure
ISO 42001 vs ISO 27001: what is the difference?
ISO 27001 governs information security. ISO 42001 governs AI. They share the same management-system structure, so they integrate cleanly rather than compete. Here is what each covers, how they overlap, and when you need one or both.
The short answer
The difference in one paragraph
ISO/IEC 27001 is the international standard for an information security management system: protecting the confidentiality, integrity and availability of information. ISO/IEC 42001 is the international standard for an AI management system: governing how an organisation develops, provides and uses artificial intelligence responsibly. Both use the same Annex SL management structure (clauses 4 to 10), both are certifiable by an accredited body, and both use a Statement of Applicability, but they treat different risks. They are complementary, not alternatives.
Side by side
ISO 42001 vs ISO 27001, compared
| ISO 27001 | ISO 42001 | |
|---|---|---|
| Standard | ISO/IEC 27001:2022 | ISO/IEC 42001:2023 |
| What it governs | Information security, through an information security management system (ISMS) | Responsible AI, through an AI management system (AIMS) |
| The core question | Is our information protected? | Is our AI governed and used responsibly? |
| First published | 2005, current revision 2022 | 2023, the first standard of its kind |
| Management structure | Annex SL, clauses 4 to 10 | Annex SL, clauses 4 to 10 (the same shape) |
| Annex A controls | 93 controls in 4 themes | 38 controls in 9 categories |
| Risk focus | Risk to information: confidentiality, integrity and availability | Risk and impact of AI on individuals, groups and society |
| Statement of Applicability | Yes, records which controls apply and why | Yes, the same mechanism for the AI controls |
| Certifiable | Yes, by an accredited certification body | Yes, by an accredited certification body |
Which one
When you need each
Reach for ISO 27001 when
- Customers, procurement teams or regulators ask how you protect their data.
- You handle sensitive information and want a recognised security baseline.
- You need a certification that opens doors in enterprise sales.
Reach for ISO 42001 when
- You build, deploy, procure or embed AI systems in your product or operations.
- Customers or regulators want evidence you govern AI responsibly.
- An AI system makes or supports decisions that affect people.
Together
How they integrate
Because both follow the Annex SL structure, the management clauses (4 to 10) line up: scope, leadership, planning, support, operation, evaluation and improvement look the same in both systems. What differs is Annex A. ISO 27001 brings its information security controls; ISO 42001 brings its AI-specific controls for impact assessment, the AI life cycle, data quality, transparency and responsible use.
In practice most organisations run a single management system that satisfies both, with shared management documents and two Annex A control sets. That keeps one audit rhythm and avoids maintaining the same policy twice.
PolicyMint generates the document set for ISO 27001 and ISO 42001, and keeps the documents that overlap consistent across both so you are not writing the same policy in two places.
ISO 42001 vs 27001 FAQ
ISO 42001 and ISO 27001, answered
The questions people ask when they are deciding between, or combining, the two.
What is the difference between ISO 27001 and ISO 42001?
ISO 27001 is the standard for information security: protecting the confidentiality, integrity and availability of information. ISO 42001 is the standard for AI management: governing how you develop, provide and use AI responsibly. They share the same management-system structure but cover different risks.
Can you be certified to both ISO 27001 and ISO 42001?
Yes. Because both follow the Annex SL structure, the clause 4 to 10 requirements line up, so many organisations run a single management system that satisfies both and keeps one certification cycle rather than two disconnected ones.
Do I need ISO 27001 before ISO 42001?
No. ISO 42001 is not conditional on ISO 27001. That said, many organisations already hold ISO 27001, and because the two share a structure and several themes overlap, adding ISO 42001 on top of an existing ISMS is usually less work than starting from scratch.
Does ISO 42001 replace ISO 27001?
No. They govern different things. If AI is part of how you handle information, they reinforce each other: ISO 27001 secures the information, ISO 42001 governs the AI that acts on it.
Which should I do first?
It depends on what is driving the work. If customers or regulators are asking about information security, start with ISO 27001. If the pressing question is about how you govern AI, start with ISO 42001. Neither blocks the other.
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