What Is PCI Compliance and Why Does It Matter? | NEXSYS Knowledge BaseNEXSYS Knowledge Base | PCI Compliance
If your business accepts credit or debit cards — whether in person, online, or over the phone — you are required to meet a set of security standards designed to protect your customers' payment information. Those standards are known as PCI DSS, and being compliant with them is commonly referred to as being "PCI compliant."
This article breaks down what PCI compliance actually is, why it exists, and what's at stake if your business isn't meeting the requirements.
PCI DSS stands for Payment Card Industry Data Security Standard. It is a set of security requirements established in 2004 by the major card brands — Visa, Mastercard, American Express, Discover, and JCB — through a governing body called the PCI Security Standards Council (PCI SSC).
The standard exists for one reason: to reduce fraud and protect cardholder data. Every time a customer swipes, taps, or enters their card number, that data needs to be handled in a secure, controlled way. PCI DSS defines what "secure and controlled" looks like.
Any business that accepts, processes, stores, or transmits payment card data is required to comply — regardless of size, industry, or transaction volume. This includes:
If you take cards, PCI applies to you — no exceptions based on size or volume.
PCI DSS is organized into 12 requirements. You don't need to memorize them, but here's what they cover at a high level:
| Req # | What It Covers |
|---|---|
| 1 | Install and maintain a firewall to protect cardholder data |
| 2 | Don't use vendor-supplied default passwords or security settings |
| 3 | Protect stored cardholder data |
| 4 | Encrypt transmission of cardholder data across open networks |
| 5 | Use and regularly update anti-virus software |
| 6 | Develop and maintain secure systems and applications |
| 7 | Restrict access to cardholder data on a need-to-know basis |
| 8 | Assign unique IDs to each person with computer access |
| 9 | Restrict physical access to cardholder data |
| 10 | Track and monitor all access to network resources and cardholder data |
| 11 | Regularly test security systems and processes |
| 12 | Maintain a policy that addresses information security |
Non-compliance isn't just a technicality — it carries real financial and operational consequences:
Many business owners assume that using a payment processor or gateway automatically makes them compliant. This is not accurate.
Your processor may handle the actual card transaction securely, but compliance responsibility extends to how your business handles, stores, and accesses that data — including your hardware, software, network, and internal policies. PCI compliance is a shared responsibility.
As your merchant services provider, NEXSYS works with you to simplify the compliance process. This includes:
PCI compliance doesn't have to be complicated. With the right setup and guidance, most small businesses can achieve and maintain compliance without significant time or expense.
Have questions about your compliance status? Contact your NEXSYS account representative or reach us at support@nexsyspros.com.