Last updated: August 6, 2026
What PCI DSS Is
PCI DSS stands for Payment Card Industry Data Security Standard. It’s a set of security requirements created by the major card networks to protect cardholder data wherever it’s stored, processed, or transmitted. Rather than a law passed by a government, it’s an industry standard that processors, gateways, and merchants agree to follow as a condition of being able to accept card payments at all.
At a high level, PCI DSS is organized around a few core ideas: keep cardholder data secure with encryption, limit who and what can access that data, secure the networks that carry it, monitor and test systems on an ongoing basis, and maintain clear policies for how all of this is managed. It’s less a single checklist and more a framework that touches nearly every part of how a business handles payments.
Who PCI DSS Applies To
PCI DSS applies to any business that stores, processes, or transmits cardholder data, regardless of size. That includes a small shop running a handful of card-not-present transactions a month and a large enterprise processing thousands of transactions a day. The specific requirements and validation steps scale with transaction volume, but the underlying obligation to protect card data applies broadly across the industry.
It also applies to the vendors and platforms merchants rely on. A payment gateway, a CRM that displays transaction data, and a virtual terminal that keys in card-not-present orders are all touching cardholder data in some form, which means the standard’s principles apply to how those tools are built, not just to the merchant using them.
What PCI DSS Actually Covers
In practice, PCI DSS requirements fall into a few broad categories that are useful for any merchant to understand:
- Encryption. Cardholder data should be encrypted both while it’s moving across a network (in transit) and while it’s stored (at rest), so that intercepted or stolen data isn’t usable on its own.
- Access control. Only people and systems that genuinely need access to cardholder data should have it, and that access should be tracked and reviewed.
- Network security. Systems that handle card data should be segmented from general business infrastructure and protected with firewalls and secure configurations.
- Monitoring and testing. Systems need to be watched for suspicious activity and regularly tested for vulnerabilities, since security is not a one-time setup.
What to Look For in a Payment Platform
Merchants evaluating a payment gateway CRM or any tool that touches card data don’t need to become PCI DSS experts, but a few practical questions go a long way:
- Is data encrypted both in transit and at rest, not just at the point of entry?
- Does the platform use tokenization, working with a token from your processor instead of storing raw card numbers, so a breach of the platform doesn’t expose usable card data?
- Are there access controls and audit logs, so you can see who viewed, refunded, or changed a transaction and when?
- Does the vendor describe its practices in specific terms, rather than vague claims of being “secure,” and are those practices designed to align with PCI DSS requirements?
Midcove is built with these principles in mind: encryption in transit and at rest, tokenized card data instead of stored raw numbers, and role-based access controls with audit logging. Midcove’s practices are designed to align with PCI DSS requirements, and because Midcove connects to the merchant account you already have, security is layered across both the platform and the gateway you’ve chosen. More detail on how this works is available on our Security page.
The Takeaway
PCI DSS exists to keep card payments trustworthy for everyone involved: merchants, processors, and cardholders. You don’t need to memorize every requirement to make good decisions. Focus on whether the platforms you rely on encrypt data properly, avoid storing raw card numbers, and can show you exactly who has access to sensitive information.