Your PCI DSS Compliance FAQs Answered by an Expert

1. What is PCI DSS and why does it still matter in today’s cyber threat landscape?

PCI DSS (Payment Card Industry Data Security Standard) is a globally recognised security standard designed to protect cardholder data and reduce the risk of fraud and cyber-attacks. It applies to any organisation that stores, processes, or transmits payment card information, regardless of size or sector.

Despite major advances in payment technologies, cloud services, and tokenisation, payment environments remain a key target for threat actors because cardholder data continues to hold significant financial value. Attackers actively target weaknesses such as poor access controls, insecure remote access, weak network segmentation, and insufficient monitoring to gain access to payment systems and sensitive data.

As an authorised PCI Qualified Security Assessor (QSA) company, Six Degrees is accredited to perform PCI DSS assessments and validate compliance against the standard. Six Degrees views PCI DSS not simply as a compliance exercise but as a critical security baseline. Achieving compliance is important, but organisations should view PCI DSS as part of a wider cyber security strategy focused on resilience, continuous improvement, and the long-term protection of sensitive payment environments.

2. Who needs to be PCI DSS compliant, and does it apply to my business?

PCI DSS applies to any organisation that stores, processes, or transmits payment card data, regardless of size, transaction volume, or industry. This includes sectors such as retail, e-commerce, hospitality, financial services, healthcare, charities, and SaaS providers that accept card payments.

One of the most common misconceptions is that PCI DSS no longer applies if payment processing is outsourced to a third-party provider. While outsourcing can significantly reduce the scope of the cardholder data environment, organisations often still retain certain PCI DSS responsibilities depending on how payment services are integrated and managed.

Six Degrees regularly works with organisations to understand their PCI DSS obligations, define the appropriate scope, and avoid common issues such as over-scoping or unintentionally leaving critical systems outside the assessment boundary.

3. What are the risks of not being PCI DSS compliant?

Failing to comply with PCI DSS can expose organisations to significant financial, operational, and reputational risks. In the event of a payment card breach, organisations may face contractual consequences from acquiring banks and payment brands, increased transaction fees, and the costs of forensic investigations and remediation.

Beyond financial impact, non-compliance can damage customer trust and disrupt business operations, particularly when sensitive payment data is compromised. Threat actors actively target poorly secured payment environments, and weaknesses such as inadequate access controls, weak monitoring, or insecure remote access are commonly exploited during attacks.

Six Degrees enables organisations to take a proactive, risk-based approach to PCI DSS, focusing not only on compliance but also on strengthening the overall security and resilience of payment environments.

4. What are the core PCI DSS requirements, in plain English?

PCI DSS is built around 12 core requirements designed to protect cardholder data and secure payment environments. In simple terms, the standard focuses on securing networks and systems, protecting sensitive data, controlling access to systems, monitoring and testing security controls, and maintaining effective security policies and governance processes.

In practice, this includes implementing firewalls, using strong authentication and multi-factor authentication (MFA), encrypting sensitive data, regularly patching systems, monitoring logs, restricting privileged access, and conducting vulnerability scans and penetration testing.

Many organisations find the technical requirements manageable individually, but the challenge often comes from maintaining visibility across complex environments, defining the correct scope, collecting evidence, and demonstrating that controls are operating consistently over time. Six Degrees translates PCI DSS requirements into practical, achievable security and compliance activities aligned with organisations’ business and operational environments.

5. How hard is PCI DSS compliance to achieve?

The complexity of achieving PCI DSS compliance depends largely on the organisation’s size, the volume of card transactions, the technologies involved, and the scope of the cardholder data environment. Organisations with legacy systems, complex networks, multiple third parties, or poorly defined payment flows often face greater challenges during the assessment process.

One of the most common difficulties is not the individual technical controls themselves, but understanding the scope correctly, maintaining accurate asset visibility, and demonstrating that security controls are consistently operating as intended.

Many organisations also underestimate the time and internal coordination required to gather evidence, remediate gaps, and align operational teams. Six Degrees helps organisations take a pragmatic, risk-based approach to PCI DSS, focusing on realistic remediation priorities and long-term security improvements rather than purely achieving “paper compliance.”

6. What’s involved in a PCI DSS assessment or compliance process?

The PCI DSS assessment process typically begins with defining the scope of the cardholder data environment and identifying the systems, people, and processes involved in storing, processing, or transmitting payment card data. From there, organisations are assessed against the applicable PCI DSS requirements through activities such as evidence reviews, technical validation, configuration reviews, and interviews with key stakeholders.

The method used to validate compliance depends on factors such as the organisation’s merchant or service provider level, payment channels, and the requirements of its acquiring bank. Depending on these factors, compliance may be validated through a Self-Assessment Questionnaire (SAQ) or a formal assessment performed by a Qualified Security Assessor (QSA). The process often involves remediation activities to address identified gaps before compliance can be formally confirmed.

As an authorised PCI Qualified Security Assessor (QSA) company, Six Degrees provides end-to-end PCI DSS expertise, from initial scoping and gap assessments through to remediation activities, formal assessments, and ongoing compliance management.

7. What changes with PCI DSS v4.0, and what should organisations do now?

PCI DSS v4.0 was introduced to address evolving cyber threats and modern payment technologies, while providing organisations with greater flexibility in implementing security controls. The updated standard places greater emphasis on continuous security, risk-based approaches, stronger authentication, and on demonstrating that controls are operating effectively over time rather than relying solely on annual compliance activities.

Key changes include expanded multi-factor authentication (MFA) requirements, additional controls around phishing and social engineering, enhanced password and authentication expectations, and the introduction of targeted risk analyses for certain activities. Organisations are also expected to maintain greater visibility and governance across their payment environments.

Six Degrees advises organisations on the impact of PCI DSS v4.0, helping them identify gaps against the updated requirements and develop practical remediation plans aligned with both compliance obligations and wider security objectives.

8. Can PCI DSS compliance improve security beyond just meeting the standard?

When implemented properly, PCI DSS can significantly strengthen an organisation’s overall cyber security posture rather than simply helping achieve compliance. Many of the controls required by PCI DSS, such as access management, vulnerability management, network segmentation, logging, monitoring, and regular security testing, closely align with recognised security best practices and broader frameworks such as ISO 27001 and NIST CSF.

Organisations that take a mature approach to PCI DSS often gain improved visibility of their systems, stronger governance processes, better control over privileged access, and a more proactive security culture. In many cases, PCI DSS can act as a foundation for broader cyber resilience and continuous improvement initiatives.

Six Degrees works with organisations to ensure PCI DSS supports wider security and business objectives, rather than becoming a standalone tick-box compliance exercise. By aligning PCI DSS activities with broader governance, risk management, and cyber security strategies, organisations can use compliance as an opportunity to improve operational resilience, strengthen security maturity, and enhance the protection of sensitive payment environments over the long term.

9. What are the most common PCI DSS mistakes organisations make?

One of the most common PCI DSS challenges organisations face is incorrectly defining the scope of their cardholder data environment. Some organisations unintentionally overscope systems, unnecessarily increasing costs and complexity, while others underestimate their payment flows and leave critical systems or processes outside the assessment boundary.

We also regularly see organisations treating PCI DSS as a once-a-year compliance exercise rather than an ongoing security programme. Issues such as poor asset visibility, unmanaged firewall rules, inconsistent access controls, incomplete logging and monitoring, and reliance on third parties without fully understanding shared responsibilities are common causes of compliance gaps and security weaknesses.

Six Degrees helps organisations avoid these pitfalls through clear scoping, practical remediation guidance, and a continuous, risk-based approach to maintaining PCI DSS compliance and strengthening payment security.

10. How can Six Degrees help with PCI DSS compliance and ongoing assurance?

As an authorised PCI Qualified Security Assessor (QSA) company, Six Degrees supports organisations throughout the full PCI DSS lifecycle, from initial scoping and gap assessments through to remediation, formal assessment activities, and ongoing compliance management. Our approach is focused on helping organisations achieve compliance in a practical and sustainable way while strengthening the overall security of their payment environments.

We work with organisations across a range of sectors and environments, including complex on-premises, cloud, hybrid, and outsourced payment infrastructures. In addition to PCI DSS assessment services, we can support broader security activities, including penetration testing, managed detection and response, and framework alignment, to help organisations maintain long-term resilience.

At Six Degrees, we believe PCI DSS should be approached as part of a broader cyber security strategy rather than as a one-off audit. Our focus is on helping organisations reduce risk, improve operational security maturity, and maintain confidence in the protection of sensitive payment data over time.

If you’d like to speak to our experts about your PCI DSS compliance journey, learn more and get in touch here.