7 Requirements for ISO 27001 certification

Requirements of ISO 27001 clause 9.2 plays a vital role in ensuring that internal audits are conducted effectively and contribute to the overall health and effectiveness of the ISMS. The ISO 27001 sub-clauses provide a framework for regular review, assessment, and improvement of the ISMS, ensuring that it remains robust, compliant, and aligned with the organization’s information security needs.

Let’s delve into each of these clauses of ISO 27001 under Clause 9.2, which focuses on the internal audit process of the Information Security Management System (ISMS)

Clause 9.2a – Conducting Internal Audits at Regular and Planned Intervals

The primary purpose of this clause is to ensure continuous monitoring and evaluation of the ISMS’s performance. By conducting audits at regular and planned intervals, an organization can systematically assess whether its ISMS is functioning as intended, remains aligned with the organization’s objectives, and continues to protect the organization against evolving security threats. Regular audits help in identifying gaps, inconsistencies, or areas of non-compliance, allowing for timely corrective actions. This ongoing process is vital for maintaining the integrity and effectiveness of the ISMS.


Develop an audit calendar that schedules audits throughout the year. This schedule should be based on the risk assessment, with higher-risk areas audited more frequently. Ensure that the audit schedule is flexible to accommodate changes in the organization’s environment or risk profile. Regular training and updates for the audit team are also important to keep them abreast of any changes in the ISMS or the standard itself.

Clause 9.2b – Conformance to ISO 27001 Requirements

This clause emphasizes the need for the ISMS to be in alignment with the specific requirements set out in the ISO 27001 standard. The purpose here is to ensure that the organization is not just following its internal procedures and policies but is also meeting the international benchmarks for information security management. This includes the adequacy of security controls, risk management processes, and compliance with legal and regulatory requirements. The clause ensures that the organization’s ISMS is robust, comprehensive, and up to international standards.


Auditors should have a checklist or framework that directly references the ISO 27001 standard’s requirements. This checklist will guide the auditors to specifically look for evidence of compliance with each requirement of the standard. Regular training on the ISO 27001 standard for auditors is crucial to ensure they understand the latest requirements and how to audit against them.

Clause 9.2c – Planning and Maintaining the Audit Program

The focus here is on establishing a structured, consistent, and effective approach to conducting internal audits. A well-planned audit program ensures that audits are conducted systematically, covering all areas of the ISMS over time. This planning should take into account the changing nature of risks, business priorities, and technological advancements. The purpose is to ensure that the audit program remains relevant, comprehensive, and capable of identifying areas for improvement and ensuring ongoing compliance.


Create a documented audit program that outlines the objectives, scope, frequency, methodologies, and responsibilities for the audits. This program should be reviewed and updated at least annually or when significant changes occur in the organization. The program should also include a process for selecting auditors and a method for evaluating the effectiveness of the audit program itself.

Clause 9.2d – Defining Audit Criteria and Scope

This clause is about ensuring that each audit is targeted and effective. By defining specific criteria and scope for each audit, the organization ensures that the audit is focused on the right areas and is assessing them against the correct standards or benchmarks. This specificity helps in making the audit more efficient and effective, as it provides clear guidance on what is being audited and the standards to be used for evaluation. It helps in achieving the audit objectives and ensures that the audit results are relevant and actionable.


For each audit, prepare a specific audit plan. This plan should detail what areas or processes will be audited (scope) and the criteria against which they will be assessed. The criteria might include relevant policies, procedures, controls, and performance metrics. The audit plan should be communicated to the auditees well in advance of the audit.

Clause 9.2e – Selection of Auditors

The selection of ISO 27001 auditors is crucial for maintaining the objectivity and impartiality of the audit process. This clause ensures that audits are conducted by individuals who are not only competent and understand the requirements of ISO 27001 but are also unbiased. This is important for ensuring that the audit findings are credible and that the audit process itself is free from any conflict of interest, thereby maintaining the integrity of the audit process.


Establish a process for selecting auditors that includes evaluating their competence, experience, and absence of conflicts of interest. This could involve maintaining a pool of trained auditors and a system for assigning them to audits where they have no direct involvement or vested interest in the outcome.

Clause 9.2f – Reporting Audit Results

Reporting the results of the audit to relevant management is critical for ensuring that the findings are acted upon. This clause ensures that management is informed about the effectiveness of the ISMS, any non-conformities, and areas requiring improvement. This enables management to make informed decisions about necessary actions to address any issues identified during the audit, thereby contributing to the continual improvement of the ISMS.


Develop a standardized format for audit reports that clearly presents the findings, evidence, conclusions, and recommendations. The audit report should be presented to relevant management promptly after the completion of the audit. There should also be a process for management to respond to the audit findings, including assigning responsibility for addressing any non-conformities.

Clause 9.2g – Documentation and Retention of Information

The purpose of this clause is to ensure that there is a comprehensive record of the audit process and its findings. This documentation is crucial for several reasons: it provides evidence of the audit process, supports the tracking of improvements or changes over time, aids in the resolution of identified issues, and ensures that knowledge and insights gained from the audits are preserved. This documentation is also essential for demonstrating compliance with the standard during external audits.


Ensure that all documentation related to audits (such as audit plans, reports, evidence, management responses, and follow-up actions) is properly recorded and stored. This could involve a digital document management system where records are easily retrievable for review or during external audits. The system should also ensure the security and confidentiality of the audit records.

What are the types of ISO 27001 Audits?

What is ISO 27001 Internal Audit?

An internal audit is a self-assessment conducted by the organization itself or by an external party on its behalf. It is an integral part of the organization’s ongoing ISMS evaluation process.

What is the purpose of internal audit?

The purpose of internal audits is to assess whether the organization’s ISMS conforms to its own requirements and the requirements of the ISO 27001 standard. It helps identify areas for improvement and ensures continuous compliance.

What is the expected outcome of internal audit?

The outcome of an internal audit includes a comprehensive understanding of the ISMS’s performance. It identifies strengths, weaknesses, and areas for improvement within the system. The audit findings help in pinpointing non-conformities and gaps in compliance with ISO 27001 standards. This process leads to actionable insights for enhancing the effectiveness of the ISMS, ensuring continuous improvement, and preparing the organization for external audits.

What is ISO 27001 External Audit?

External audits are conducted by independent auditors from a certification body. These audits are divided into two stages: Stage 1 (Documentation Review) and Stage 2 (Main Audit).

  • Stage 1: This preliminary audit focuses on reviewing the ISMS documentation to ensure it meets ISO 27001 standards.
  • Stage 2: This is a more detailed audit that assesses the actual implementation and effectiveness of the ISMS.

What is the purpose of External Audit?

The primary purpose of external audits is to determine whether the organization meets the criteria for ISO 27001 certification. It is essential for obtaining and maintaining the certification.

What is the expected outcome of an External Audit?

The outcome of an external audit is critical for certification:

  • Stage 1: The outcome here is a report on the readiness of the organization’s ISMS documentation. It identifies gaps or areas where the documentation does not meet ISO 27001 standards, allowing the organization to make necessary adjustments before the main audit.
  • Stage 2: The main outcome is a determination of whether the organization’s ISMS is effectively implemented and functioning in compliance with ISO 27001. If successful, the organization is granted ISO 27001 certification. This certification enhances the organization’s credibility and trustworthiness in managing information security.

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