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Jessica Doering

June 12, 2024



 min reading time

Conducting an Internal Audit in ISO 27001

An important aspect of ISO 27001 is the internal audit, a proactive measure that helps organizations to identify, assess and eliminate potential information security risks. In this blog, we look at the need and importance of internal audits and provide managers with a step-by-step guide on how to approach and conduct an internal audit.

Is Conducting an Internal Audit in ISO 27001 Mandatory

Yes, conducting internal audits is a mandatory requirement of ISO 27001. The standard emphasizes the importance of regular assessments to ensure that the information security management system (ISMS) is not only implemented, but also effectively maintained and improved over time. 

Internal audits play a crucial role in verifying the ISMS's compliance with the requirements of ISO 27001 and identifying areas for improvement.

Why is Conducting an Internal Audit Important?

  • Continuous Improvement: Internal audits facilitate a continuous improvement cycle by identifying areas of non-compliance, inefficiencies and potential weaknesses in the ISMS.
  • Risk Management: Internal audits help with the assessment and effective management of information security risks. By identifying and eliminating potential vulnerabilities, companies can reduce the likelihood of security incidents.
  • Demonstration of Commitment: Regular internal audits demonstrate an organization's commitment to maintaining a robust information security management system and build trust with stakeholders, customers and regulators.
  • Legal and Regulatory Compliance: In many industries, there are legal and regulatory requirements for information security. Conducting internal audits helps to ensure compliance with these standards.

What Happens in an Internal Audit?

Audit Planning:

  • Define the scope and objectives of the audit.
  • Identify the audit team and assign roles and responsibilities.
  • Develop an audit plan, including a schedule and checklist.

Audit Execution:

  • Conduct interviews with relevant personnel.
  • Review documentation, policies, and procedures.
  • Assess the effectiveness of controls in place.
  • Identify and document non-conformities.


  • Prepare an audit report detailing findings, observations, and recommendations.
  • Classify non-conformities based on severity.
  • Provide evidence-based insights to support the findings.


  • Collaborate with responsible parties to address non-conformities.
  • Verify the implementation of corrective actions.
  • Update documentation and records accordingly.

How to Approach Conducting an Internal Audit as a Manager

Leadership and Support:

  • Demonstrate leadership by actively supporting the audit process.
  • Ensure that necessary resources are allocated for the audit.

Training and Competency:

  • Ensure that the audit team is adequately trained and possesses the necessary competencies.
  • Encourage ongoing professional development to stay abreast of industry best practices.


  • Communicate the importance of the audit to the organization.
  • Foster a culture of openness and transparency, encouraging staff to cooperate with the audit process.

Continuous Improvement:

  • Use audit findings as opportunities for improvement.
  • Encourage a proactive approach to addressing identified weaknesses.

Integration with Business Processes:

  • Integrate the internal audit process with other business processes to ensure alignment with organizational objectives.

In summing up, conducting internal audits as part of ISO 27001 is not only mandatory, but also a critical component of maintaining a robust information security management system. 

Managers play a central role in ensuring the success of internal audits by providing leadership and support and promoting a culture of continuous improvement. By taking a strategic approach to internal audits, organizations can improve their information security and better protect sensitive data.

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Jessica Doering

Jess is the marketing mind at Secfix. She loves every dog on this planet!

ISO 27001

ISO 27001
ISO 27001