The question our clients ask most often is: "If we already have ISO 27001, do we need to do anything more to comply with the PDPA?" The answer is that ISO 27001 lays a strong information security foundation, but the PDPA carries specific requirements around data-subject rights that the international standard does not directly cover.
Where the Two Frameworks Overlap
Both ISO 27001 and the PDPA share core principles — risk assessment over data, need-to-know access control, encryption, and data breach notification. Many Annex A controls under the Technological theme can therefore directly support PDPA compliance.
What the PDPA Requires Beyond ISO 27001
What ISO 27001 does not directly prescribe is a consent mechanism, a Record of Processing Activities, and processes to support data-subject rights — such as the right of access, the right to erasure, or the right to data portability. Organizations must design these additional processes to connect with their existing information security management system.
A Recommended Integrated Approach
The most effective approach is to make the Data Protection Officer a key stakeholder in the ISO 27001 risk assessment process, and to embed PDPA requirements into the information security policy itself, rather than managing two entirely separate systems — reducing duplicated effort and the risk of the two frameworks contradicting each other.