How often is the ASV scan required?
Quarterly per Req. 11.3.2. Plus after any significant change to the CDE. Failed scans must be remediated and rescanned to a passing result.
Is annual penetration testing always required?
Yes per Req. 11.4 (and after any significant change). Both internal and external; segmentation controls must be validated. Methodology must be industry-accepted (e.g. PTES, OSSTMM, OWASP).
What's new in PCI DSS 4.0.1 ongoing cadence vs 3.2.1?
Targeted risk analyses for periodic frequencies + Customised Approach controls (12.3.1), expanded service provider segmentation testing, MFA on all CDE access, role-based developer training, and more documented evidence around scoping.
Does this calendar apply to SAQ-A merchants?
Many cadences scale down. SAQ-A only outsources card data fully — but you still need vendor management, training, policy review, and incident response prep. Ignore the cadence and you'll fail your acquirer's annual SAQ check.