Summary

Level 1: Over 6 million transactions annually — requires on-site audit by a Qualified Security Assessor (QSA) - Level 1: Over 300,000 transactions annually — requires QSA assessment - Treating compliance as a one-time project: PCI DSS requires continuous monitoring and annual reassessment

PCI DSS Complete Guide for Software Companies: Everything You Need to Know

If your software company handles, processes, stores, or transmits cardholder data, PCI DSS compliance is not optional — it’s a legal and contractual obligation. Yet many software companies underestimate the scope of what’s required, leading to costly breaches, failed audits, and damaged customer relationships.

This complete guide breaks down PCI DSS requirements specifically for software companies, so you can build a compliant product and business with confidence.

What Is PCI DSS and Why Does It Matter for Software Companies?

The Payment Card Industry Data Security Standard (PCI DSS) is a set of security requirements established by the PCI Security Standards Council (PCI SSC). It was created by major card brands — Visa, Mastercard, American Express, Discover, and JCB — to protect cardholder data and reduce payment fraud.

For software companies, PCI DSS matters for several reasons:

You may be a merchant if you accept payments directly for your SaaS subscriptions
You may be a service provider if your software processes or stores payment data on behalf of clients
You may be a software vendor if you build payment applications that clients use to handle card data

Understanding which role applies to your company determines your compliance obligations and the level of scrutiny you’ll face during assessments.

Understanding PCI DSS Versions: What’s Current?

As of 2024, PCI DSS v4.0 is the active standard, with version 3.2.1 officially retired in March 2024. Version 4.0 introduces more flexibility in how companies meet requirements, emphasizes a customized approach for mature security programs, and strengthens requirements around authentication, encryption, and targeted risk analysis.

Software companies should ensure all compliance documentation, policies, and controls are aligned to v4.0 requirements.

The 12 PCI DSS Requirements: A Software Company Overview

PCI DSS is organized around 12 core requirements grouped into six control objectives. Here’s what they mean for your software company:

1. Install and Maintain Network Security Controls

Your software infrastructure must include properly configured firewalls, network segmentation, and access controls between cardholder data environments (CDE) and other systems.

2. Apply Secure Configurations to All System Components

Default passwords must be changed. Unnecessary services must be disabled. This applies to your cloud instances, containers, and development environments.

3. Protect Stored Account Data

If your software stores cardholder data, it must be encrypted using strong cryptography. Primary Account Numbers (PANs) must be rendered unreadable wherever stored.

4. Protect Cardholder Data with Strong Cryptography During Transmission

All cardholder data transmitted across open or public networks must use TLS 1.2 or higher. This includes your APIs, web applications, and mobile SDKs.

5. Protect All Systems Against Malware

Anti-malware solutions must be deployed and actively maintained on all applicable system components within your cardholder data environment.

6. Develop and Maintain Secure Systems and Software

This requirement is especially critical for software companies. It covers:

Secure development lifecycle (SDLC) practices
Code reviews and vulnerability management
Protection against common vulnerabilities (OWASP Top 10)
Change management procedures

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

Role-based access control (RBAC) must be implemented. Only personnel who need access to cardholder data should have it.

8. Identify Users and Authenticate Access to System Components

Multi-factor authentication (MFA) is now required for all access into the CDE. Shared credentials are prohibited.

9. Restrict Physical Access to Cardholder Data

If your company maintains on-premises infrastructure, physical security controls must be in place. For cloud-native companies, this largely transfers to your cloud provider’s responsibility — but you must document this.

10. Log and Monitor All Access to System Components and Cardholder Data

Audit logs must be maintained, protected, and reviewed regularly. Log retention must meet minimum timeframes (12 months, with 3 months immediately available).

11. Test Security of Systems and Networks Regularly

Quarterly vulnerability scans by an Approved Scanning Vendor (ASV), annual penetration testing, and internal network scans are all required.

12. Support Information Security with Organizational Policies and Programs

You need a formal information security policy, a risk assessment process, an incident response plan, and a vendor management program.

Determining Your Merchant or Service Provider Level

PCI DSS compliance requirements scale with transaction volume and risk. Software companies typically fall into these categories:

As a Merchant:

Level 1: Over 6 million transactions annually — requires on-site audit by a Qualified Security Assessor (QSA)
Levels 2–4: Lower volumes — may self-assess using a Self-Assessment Questionnaire (SAQ)

As a Service Provider:

Level 1: Over 300,000 transactions annually — requires QSA assessment
Level 2: Under 300,000 — may use SAQ D for Service Providers

Most early-stage SaaS companies start at lower merchant levels but grow into higher requirements quickly.

Choosing the Right SAQ for Your Software Company

The Self-Assessment Questionnaire you use depends on how your software interacts with cardholder data:

SAQ A: You’ve fully outsourced payment processing (e.g., using Stripe or Braintree iframes) and never touch cardholder data directly
SAQ A-EP: You redirect customers to a third-party payment page but your website could impact payment security
SAQ D: You store, process, or transmit cardholder data directly — the most comprehensive questionnaire

Most SaaS companies using modern payment processors like Stripe or Square with hosted payment fields qualify for SAQ A, dramatically reducing compliance burden.

Scope Reduction: The Most Important Strategy for Software Companies

The single most effective way to simplify PCI DSS compliance is to reduce your cardholder data environment (CDE) scope. Here’s how:

Use tokenization: Replace cardholder data with tokens so your systems never see raw card numbers
Implement hosted payment fields: Let your payment processor render the card input form within an iframe on their servers
Avoid storing PANs: If you don’t need to store card numbers, don’t
Segment your network: Isolate systems that touch cardholder data from the rest of your infrastructure

Reducing scope means fewer systems, fewer people, and fewer processes fall under PCI DSS requirements — saving significant time and money.

Key Documentation Your Software Company Needs

Documentation is the backbone of any PCI DSS compliance program. Auditors and assessors will expect to see:

Information Security Policy
Cardholder Data Flow Diagrams
Network Diagrams showing CDE boundaries
Secure Software Development Lifecycle (SDLC) Policy
Incident Response Plan
Vulnerability Management Policy
Access Control Policy
Third-Party / Vendor Risk Management Policy
Penetration Testing Reports
ASV Scan Reports
Risk Assessment Documentation

Creating these documents from scratch is time-consuming. Many software companies accelerate this process using pre-built compliance templates tailored to PCI DSS requirements.

Common PCI DSS Mistakes Software Companies Make

Avoid these frequent compliance pitfalls:

Assuming your payment processor handles everything: They handle their scope, not yours
Neglecting developer security training: Requirement 6 mandates security awareness for developers
Skipping logging and monitoring: Many breaches go undetected due to poor log management
Ignoring third-party vendor risk: Every vendor with access to your CDE must be assessed
Treating compliance as a one-time project: PCI DSS requires continuous monitoring and annual reassessment

FAQ: PCI DSS for Software Companies

Do I need PCI DSS compliance if I use Stripe or PayPal?

Yes, but your scope may be minimal. Using a third-party processor like Stripe with hosted payment fields typically qualifies you for SAQ A, the simplest self-assessment. However, you still need to complete the SAQ, implement basic security controls, and maintain required documentation.

What’s the difference between PCI DSS and PA-DSS?

PA-DSS (Payment Application Data Security Standard) has been replaced by the PCI Secure Software Standard (PCI SSS). If you develop payment applications sold to other merchants, you may need to validate under the PCI Software Security Framework (SSF) rather than just PCI DSS.

How long does PCI DSS compliance take for a software company?

For a small SaaS company using a third-party processor (SAQ A), compliance can be achieved in 2–4 weeks with the right documentation in place. For larger companies with direct card processing, expect 3–6 months for full compliance readiness.

What happens if my software company fails a PCI DSS audit?

Consequences include fines from card brands (typically $5,000–$100,000 per month), increased transaction fees, mandatory forensic investigations after a breach, and potential termination of your merchant account.

Is PCI DSS the same as SOC 2?

No. PCI DSS specifically governs payment card data security. SOC 2 is a broader trust services framework covering security, availability, and confidentiality. Many software companies pursue both, and controls often overlap.

Start Your PCI DSS Journey the Right Way

PCI DSS compliance doesn’t have to be overwhelming. With the right framework, clear documentation, and a practical approach to scope reduction, your software company can achieve and maintain compliance efficiently.

Don’t waste months building compliance documents from scratch. Our professionally crafted, ready-to-use PCI DSS compliance template bundle includes every policy, procedure, and form your software company needs — pre-written, fully customizable, and aligned to PCI DSS v4.0.

👉 Browse our PCI DSS Template Bundle today and go from compliance chaos to audit-ready in days, not months.