Summary

This guide breaks down exactly what PCI DSS requires from software companies, what version 4.0 changes mean for developers, and how to build a sustainable compliance program without reinventing the wheel. Default passwords and insecure settings are a leading cause of breaches. PCI DSS requires: - Require multi-factor authentication (MFA) for all access to the CDE — this is now mandatory for all users, not just remote access

PCI DSS Requirements for Software Companies: A Complete Compliance Guide

If your software company handles, processes, stores, or transmits cardholder data — or if you build applications that do — PCI DSS compliance isn’t optional. The Payment Card Industry Data Security Standard (PCI DSS) applies broadly, and many software companies are surprised to discover just how much of their infrastructure and development practices fall under its scope.

What Is PCI DSS and Does It Apply to Your Software Company?

PCI DSS is a global security standard maintained by the Payment Card Industry Security Standards Council (PCI SSC). It was designed to protect cardholder data and reduce payment card fraud.

Your software company is likely in scope if you:

Build or maintain payment processing applications
Store, process, or transmit cardholder data (card numbers, CVVs, expiration dates)
Provide SaaS platforms that merchants use to accept payments
Have access to client environments that handle payment data
Develop APIs that connect to payment gateways or card networks

Even if you use a third-party payment processor like Stripe or Braintree, you may still need to comply with certain requirements depending on your integration method.

Understanding Your PCI DSS Merchant or Service Provider Level

Before diving into specific requirements, you need to determine your compliance level. Software companies typically fall into one of two categories:

Merchant levels are based on annual transaction volume. Most software companies that process payments directly fall into Level 3 or Level 4, requiring a Self-Assessment Questionnaire (SAQ).

Service providers are entities that store, process, or transmit cardholder data on behalf of others. If your SaaS platform enables payment processing for clients, you’re likely a service provider — subject to stricter requirements and potentially requiring a Report on Compliance (ROC) from a Qualified Security Assessor (QSA).

The 12 Core PCI DSS Requirements Explained for Software Companies

PCI DSS v4.0 (the current version as of 2024) organizes its controls into 12 high-level requirements across six goals. Here’s what each means for a software company specifically.

1. Install and Maintain Network Security Controls

Your cardholder data environment (CDE) must be protected by firewalls, network segmentation, and access controls. For software companies, this means:

Isolating systems that touch payment data from the rest of your infrastructure
Documenting all network diagrams showing data flows
Implementing cloud security groups and VPC configurations if hosted on AWS, Azure, or GCP

2. Apply Secure Configurations to All System Components

Default passwords and insecure settings are a leading cause of breaches. PCI DSS requires:

Hardening all servers, containers, and cloud instances
Disabling unused services and ports
Maintaining a system configuration standard for every component type

3. Protect Stored Account Data

This is where many software companies run into trouble. PCI DSS strictly limits what cardholder data you can store and how. Key rules include:

Never store CVV/CVC codes after authorization — ever
Encrypt Primary Account Numbers (PANs) using strong cryptography (AES-256 is standard)
Implement data retention policies and purge data that’s no longer needed
Use tokenization wherever possible to reduce storage of actual card data

4. Protect Cardholder Data with Strong Cryptography During Transmission

Any cardholder data sent across open networks must be encrypted. For software companies:

Enforce TLS 1.2 or higher on all payment-related endpoints
Disable older protocols like SSL, TLS 1.0, and TLS 1.1
Validate certificates and implement proper certificate management

5. Protect All Systems Against Malware

Your development and production environments need anti-malware controls:

Deploy endpoint protection on all systems in scope
Implement regular malware scans
Ensure developer workstations that access CDE systems are included in scope

6. Develop and Maintain Secure Systems and Software

This requirement is especially critical for software companies. PCI DSS v4.0 significantly expanded secure development requirements:

Follow a formal Secure Software Development Lifecycle (SSDLC)
Train developers on secure coding practices annually
Conduct code reviews for all custom code before production release
Perform application security testing (SAST, DAST, penetration testing)
Manage third-party libraries and components for known vulnerabilities
Implement a vulnerability management program with defined remediation timelines

7. Restrict Access to System Components and Cardholder Data by Business Need to Know

Role-based access control (RBAC) must be implemented and documented:

Grant access to cardholder data only to employees who need it
Document all access rights and review them at least every six months
Implement least-privilege principles across all systems

8. Identify Users and Authenticate Access to System Components

Strong authentication is non-negotiable under PCI DSS v4.0:

Require multi-factor authentication (MFA) for all access to the CDE — this is now mandatory for all users, not just remote access
Enforce strong password policies (minimum 12 characters under v4.0)
Prohibit shared or group accounts
Implement automatic session timeouts

9. Restrict Physical Access to Cardholder Data

If your company has on-premises servers or offices where cardholder data could be accessed:

Control physical access to server rooms and data centers
Implement visitor logs and escort policies
Secure physical media containing cardholder data

10. Log and Monitor All Access to Network Resources and Cardholder Data

Comprehensive logging is essential for both security and compliance:

Enable audit logs on all systems in the CDE
Store logs for at least 12 months (three months immediately available)
Implement a Security Information and Event Management (SIEM) solution
Alert on suspicious activity and review logs daily

11. Test Security of Systems and Networks Regularly

Ongoing testing keeps your security posture current:

Run internal and external vulnerability scans quarterly
Conduct penetration testing at least annually (and after significant changes)
Use an Approved Scanning Vendor (ASV) for external scans
Implement file integrity monitoring on critical systems

12. Support Information Security with Organizational Policies and Programs

Documentation and governance are foundational:

Maintain a formal Information Security Policy
Conduct annual security risk assessments
Establish an incident response plan and test it annually
Manage third-party vendor risks with documented agreements

PCI DSS v4.0: Key Changes Software Companies Must Know

PCI DSS v4.0 introduced several requirements that directly impact software development practices:

Requirement 6.3.3: All software must be protected from known vulnerabilities — third-party components included
Requirement 6.4: Web-facing applications must be protected by a WAF or undergo a code review annually
Requirement 8.4.2: MFA is now required for all access into the CDE, not just remote access
Targeted risk analysis: Many controls now require a customized risk analysis to justify implementation frequency

The deadline for full v4.0 compliance with all future-dated requirements was March 31, 2025, meaning these are now mandatory.

Practical Steps to Achieve PCI DSS Compliance as a Software Company

Getting compliant doesn’t have to be overwhelming. Here’s a practical roadmap:

Define your CDE scope — identify every system, person, and process that touches cardholder data
Reduce scope through segmentation and tokenization — the smaller your CDE, the simpler compliance becomes
Conduct a gap assessment against all 12 requirements
Prioritize remediation based on risk and assessment findings
Document everything — policies, procedures, evidence, diagrams
Engage a QSA if you’re a service provider or handling high transaction volumes
Complete your SAQ or ROC and submit to your acquiring bank or card brands

Frequently Asked Questions

Does PCI DSS apply to software companies that don’t directly process payments?

Yes, potentially. If your software accesses, manages, or could impact cardholder data environments — even indirectly — you may be considered a service provider under PCI DSS. This includes companies providing hosting, managed services, or security tools used in payment environments.

What’s the difference between an SAQ and a ROC?

A Self-Assessment Questionnaire (SAQ) is a self-reported compliance validation tool for smaller merchants and service providers. A Report on Compliance (ROC) is a formal audit conducted by a Qualified Security Assessor (QSA) and is typically required for larger service providers or Level 1 merchants.

How does using Stripe or another payment processor affect our PCI DSS scope?

Using a third-party processor can significantly reduce your scope. If you use hosted payment pages or iframes (like Stripe.js), cardholder data never touches your servers, allowing you to complete a simpler SAQ A. However, if your integration method passes card data through your servers, your scope expands considerably.

How often does PCI DSS compliance need to be renewed?

PCI DSS compliance is an annual requirement. You must complete your SAQ or ROC, conduct quarterly vulnerability scans, and perform annual penetration testing each year to maintain compliance status.

What happens if a software company fails to comply with PCI DSS?

Non-compliance can result in fines from card brands (typically $5,000–$100,000 per month), increased transaction fees, loss of the ability to process card payments, and significant reputational and legal liability in the event of a data breach.

Build Your Compliance Program Faster with Ready-to-Use Templates

Achieving PCI DSS compliance requires extensive documentation — policies, procedures, risk assessments, incident response plans, vendor agreements, and more. Writing all of this from scratch takes weeks and requires specialized expertise.

Our professionally crafted PCI DSS compliance template library gives your software company a head start with:

✅ Pre-written Information Security Policy aligned to PCI DSS v4.0
✅ Secure Software Development Lifecycle (SSDLC) documentation
✅ Risk assessment templates and vendor management agreements
✅ Incident response plan and breach notification procedures
✅ Access control and acceptable use policies
✅ Evidence collection checklists for SAQ completion

Stop spending weeks on documentation and start with templates trusted by compliance teams at software companies just like yours. Browse our PCI DSS template packages today and get audit-ready in days, not months.