The release of PCI DSS v4.0.1 introduced greater flexibility in how organizations can meet security objectives. While many organizations welcomed the introduction of the Customized Approach, it also created significant confusion.
- Can organizations simply design their own controls?
- When should a Compensating Control be used?
- Can a Customized Approach replace a Compensating Control?
To address these questions, the PCI Security Standards Council (PCI SSC) has released a new Information Supplement, “PCI DSS v4.x: Guidance for Compensating Controls and the Customized Approach” (June 2026), which provides much-needed clarification for organizations and Qualified Security Assessors (QSAs).
Why Was This Guidance Needed?
One of the biggest changes introduced in PCI DSS v4.0.1 was the ability for organizations to satisfy many PCI DSS requirements through either:
- The traditional Defined Approach, or
- The Customized Approach
Many organizations interpreted this flexibility as the ability to replace any PCI DSS requirement with internally designed controls. Others assumed that Compensating Controls and the Customized Approach were interchangeable.
The new guidance makes it clear that they serve two completely different purposes.
Understanding the Difference
Compensating Controls: Compensating Controls are not an alternative design option. They exist only when an organization cannot comply with a PCI DSS requirement exactly as written because of a legitimate technical or business constraint.
Typical examples include:
- Legacy payment applications that cannot support Multi-Factor Authentication
- Older operating systems that cannot run anti-malware software
- Infrastructure limitations preventing encryption of stored PAN until a migration project is completed
In these situations, the organization must implement alternative controls that provide equivalent protection while documenting:
- the constraint,
- the associated risks,
- how the compensating control mitigates those risks,
- how effectiveness is validated, and
- how the control will continue to be maintained.
Importantly, PCI SSC now clarifies that Compensating Controls cannot be used to justify missed activities retrospectively. They are designed to address ongoing technical or business constraints—not failures to perform required activities.
Customized Approach: Customized Approach is fundamentally different. Instead of following the prescribed PCI DSS requirements exactly, organizations intentionally design their own security controls that achieve the same objectives defined in PCI DSS.
This is not intended as an easier route. In reality, it demands significantly more:
- mature risk management,
- well-defined security engineering,
- comprehensive documentation,
- formal targeted risk analysis,
- control effectiveness testing,
- and ongoing monitoring.
PCI SSC specifically recommends this approach for organizations with mature security and risk management capabilities.
Compensating Controls vs Customized Approach
Compensating Controls | Customized Approach |
Used because a requirement cannot be met due to a documented constraint | Used because the organization intentionally chooses a different control design |
Based on the Defined Approach | Based on the Customized Approach Objective |
Requires Compensating Control Worksheet (CCW) | Requires Controls Matrix and Targeted Risk Analysis |
Alternative control addresses technical/business limitations | Organization designs entirely new control implementation |
Suitable for legacy constraints | Suitable for mature organizations with advanced security capabilities |
Documentation Is No Longer Optional
One of the strongest messages in the guidance is that documentation determines whether controls can be validated.
For Compensating Controls, organizations should document:
- technical or business constraints,
- control objectives,
- risks,
- validation procedures,
- maintenance activities,
- evidence of effectiveness.
For Customized Controls, documentation expands considerably and includes:
- Customized Controls Matrix
- Targeted Risk Analysis
- Testing procedures
- Test results
- Ongoing monitoring activities
- Evidence that the customized control provides protection equivalent to the Defined Requirement
If documentation is incomplete, assessors may determine that the requirement is “Not in Place.”
Who Should Consider the Customized Approach?
Although attractive, the Customized Approach is not suitable for every organization.
Organizations considering it should already possess:
- mature cybersecurity governance,
- established enterprise risk management,
- experienced security architecture teams,
- continuous monitoring capabilities,
- comprehensive testing practices,
- strong documentation disciplines.
For many organizations, the Defined Approach remains the most efficient and practical method of demonstrating compliance.
What This Means for Organizations
As PCI DSS assessments become increasingly outcome-focused, organizations should reassess how they demonstrate compliance.
Key actions include:
- Review existing Compensating Controls to ensure they meet PCI DSS expectations.
- Determine whether any requirements could legitimately benefit from the Customized Approach.
- Improve documentation quality for all alternative controls.
- Engage assessors early when planning Customized Controls.
- Ensure security teams understand the additional governance and evidence requirements before selecting a Customized Approach.
Organizations that develop robust documentation, mature governance, and proactive risk management will be significantly better positioned during PCI DSS assessments.
How MAST Consulting Can Help
At MAST Consulting, we help organizations navigate the evolving PCI DSS landscape by providing:
- PCI DSS v4.x Gap Assessments
- Readiness Assessments
- Compensating Control Design and Documentation
- Customized Approach Advisory
- Targeted Risk Analysis Development
- PCI DSS Internal Audits
- ROC and Assessment Preparation
- Security Governance and Risk Management Advisory
Whether you are preparing for your first PCI DSS assessment or transitioning to PCI DSS v4.0.1, our specialists can help you implement practical, defensible, and audit-ready security controls.
