ISO 27701 Privacy Guide
Data privacy has become one of the core indicators of trust for a business, and one of the key differentiators. Customers, partners and regulators alike all expect that companies maintain secure systems, and that personal data is handled with care. ISO 27701’s purpose is to ensure that security.
It applies the same management-system approach as ISO 27001 to privacy, giving enterprises a structured way to demonstrate compliance with data-protection laws like the GDPR.
What is ISO 27701?
ISO/IEC 27701 is an international standard for a Privacy Information Management System (PIMS). Since the 2025 edition it is a standalone standard, so organisations can certify without first holding ISO 27001, though many run the two together.
The framework defines privacy responsibilities for two primary roles:
PII Controllers (Controllers): determine how and why personal data is processed.
PII Processors (Processors): process personal data on behalf of controllers.
By aligning security and privacy controls, ISO 27701 helps organizations manage both confidentiality and lawful data processing within one governance model.
Link to GDPR
ISO 27701 was developed in close alignment with the EU General Data Protection Regulation (GDPR). While it isn’t a legal substitute, it aligns with many of the same principles.
Key privacy requirements
ISO 27701 sets out privacy-specific requirements for organisations acting as PII controllers and processors, including:
Data Processing Transparency: Maintain records of processing activities and share clear notices with data subjects.
Risk-Based Privacy Assessment: Conduct privacy impact assessments to identify and mitigate PII-related risks.
Data Subject Rights Management: Implement processes for access, correction, erasure, and portability requests.
Third-Party Governance: Extend privacy requirements to vendors and partners through contractual clauses.
Privacy by Design and Default: Integrate privacy considerations into product development and system architecture.
Ongoing Monitoring and Improvement: Track compliance metrics and update controls as laws and technologies evolve.
Steps to certification
Achieving ISO 27701 certification typically requires six phases:
Certification is valid for three years with annual surveillance audits required to ensure ongoing conformance.
FAQs
Do we need ISO 27001 before ISO 27701? No. Since ISO/IEC 27701:2025 you can certify without ISO 27001. Organisations certified to the 2019 edition have until October 2028 to transition.
Does ISO 27701 ensure GDPR compliance? It doesn’t guarantee legal compliance, but it provides a verifiable structure for demonstrating alignment.
How long does implementation take? For organizations with ISO 27001 in place, 2 to 4 months is typical; new programs may take longer.
Can a processor be certified without a controller? Yes, processors can obtain certification independently for their own PIMS.
How does ISO 27701 compare to NIST Privacy Framework? NIST focuses on risk management; ISO 27701 provides a globally certifiable system for privacy governance.
