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PCI compliance: What is it and why does it matter?
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PCI compliance: What is it and why does it matter?

By: Moneris Team
May 20, 2026 clock Calculating time...
PCI Compliance: What is it and why does it matter Hero Image

Key takeaways

  1. PCI compliance is a mandatory security standard for any business that accepts, processes or stores credit card payment information.
  2. PCI DSS exists to protect cardholder data, reduce fraud risk and ensure businesses can accept payments securely and responsibly.
  3. PCI compliance applies to any business—small or large—that accepts payment in person, online or over the phone.
  4. Businesses are responsible for maintaining secure payment processes, but using PCI-compliant payment tools can significantly reduce complexity and risk.
  5. Failing to maintain PCI compliance can lead to financial penalties, increased fraud exposure and loss of customer trust.
  6. Partnering with a trusted payment provider that supports PCI-compliant infrastructure helps businesses protect payment data and maintain secure, reliable payment processing.

PCI compliance is a mandatory security standard for any business that accepts, processes or stores credit card payments, no matter the size. It exists to protect cardholder data and reduce the risk of payment fraud. Failing to meet these requirements can lead to financial penalties, chargebacks and, in serious cases, the loss of your ability to accept card payments.

Every business that accepts card payments is responsible for handling payment data securely, whether transactions happen in person, online or over the phone. Understanding PCI compliance helps clarify what is required to accept card payments safely and ensures your payment systems remain secure and reliable.

The good news is that maintaining PCI compliance is more manageable than it sounds. Using secure payment tools designed to meet PCI DSS requirements helps protect payment data automatically, allowing your business to accept payments confidently without managing complex security controls directly.

What PCI compliance is and why it exists

PCI compliance refers to the Payment Card Industry Data Security Standard (PCI DSS), a global set of security requirements for businesses that accept, process or transmit credit card information. These standards ensure payment card data is handled securely at every stage of a transaction.

PCI DSS applies to any business that accepts credit card payments, regardless of size or transaction volume. Compliance is required by major card networks such as Visa and Mastercard, and payment processors and acquiring banks rely on these standards to ensure payment environments remain secure.

PCI compliance is formally validated through documents such as the Self-Assessment Questionnaire (SAQ) and Attestation of Compliance (AoC), which confirm that your payment systems and procedures meet required security standards. Moneris provides guidance and resources to help merchants understand and complete PCI validation requirements.

 

PCI compliance protects specific types of card data 

PCI DSS protects payment card account data, which includes the card number, cardholder name and expiration date. It also protects sensitive authentication data such as security codes and PIN information used to authorize transactions.

This information must be handled securely and must never be stored improperly. Sensitive authentication data, such as security codes, must never be retained after a transaction is completed.

Secure payment terminals and hosted checkout systems encrypt card data immediately when a card is tapped, inserted or entered online. This prevents sensitive information from being exposed to your POS system, staff or internal network.

For most small and medium businesses, using secure, PCI-compliant payment systems and avoiding manual storage of card numbers significantly reduces risk and simplifies compliance.

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What PCI DSS requires businesses to protect

PCI DSS outlines the security practices businesses must follow when accepting credit card payments. These practices focus on protecting payment card data, securing payment systems and preventing unauthorized access.

For most small and medium businesses, PCI compliance does not mean managing complex security infrastructure directly. Using secure payment terminals, hosted checkout and PCI-compliant payment providers ensures that many of these protections are handled automatically.

PCI DSS organizes its security standards into a set of core requirements designed to keep payment systems secure and cardholder data protected at every stage of a transaction.

The 12 PCI DSS requirements explained simply

PCI DSS includes 12 core security requirements that businesses must follow when accepting credit card payments. These requirements focus on protecting payment data, securing systems and preventing unauthorized access.

For most small and medium businesses using secure payment terminals or hosted checkout, many of these technical security requirements are handled automatically by a payment provider like Moneris.

PCI DSS Goal

#

What this means for your business

Build and maintain secure payment systems

1

Install and maintain network security controls to protect payment systems from unauthorized access

2

Use secure system configurations and avoid default passwords on payment devices and systems

Protect cardholder data

3

Protect stored cardholder data and never store sensitive authentication data improperly

4

Encrypt card data when it is transmitted over networks

Maintain secure systems

5

Protect systems and devices against malware and security threats

6

Keep payment devices, software and systems updated with the latest security patches

Control access to payment data

7

Restrict access to cardholder data to authorized staff only

8

Assign unique user IDs and secure credentials for anyone accessing payment systems

9

Restrict physical access to payment terminals and systems

Monitor and test security

10

Monitor access to systems and payment data to detect suspicious activity

11

Test systems regularly to identify vulnerabilities and security risks

Maintain security policies

12

Maintain security policies and procedures to protect payment data

Why maintaining PCI compliance is important

PCI compliance helps ensure your business can continue accepting card payments securely and without disruption. It supports reliable payment processing, protects customer data and keeps payments running without hiccups. Here’s how PCI compliance supports day-to-day operations.

  • Uninterrupted payment processing: PCI compliance helps ensure payment providers and card networks can continue supporting your business. Meeting these requirements keeps payment processing stable and avoids disruptions that could affect daily operations.
  • Reduced financial risk: Secure payment systems reduce the risk of unauthorized transactions, chargebacks and unexpected costs associated with compromised payment data.
  • Smoother payment operations: Businesses that maintain secure payment environments are less likely to trigger additional monitoring, restrictions or administrative requirements from payment providers.
  • Customer trust and confidence: Customers expect their payment information to be handled securely. Maintaining PCI compliance reinforces confidence and helps ensure customers feel comfortable completing transactions.
  • Alignment with card network requirements: Credit card companies require PCI compliance as part of accepting card payments. Using secure, compliant payment systems helps ensure your business continues meeting these requirements without interruption.
  • Simplified compliance requirements: Using secure, PCI-compliant payment systems can reduce the number of technical requirements businesses must manage directly, making compliance easier to maintain.

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How businesses become PCI compliant

For most small and medium businesses, becoming PCI compliant involves using secure payment systems and completing an annual validation process.

Confirm your payment setup

PCI requirements depend on how your business accepts payments, such as countertop terminals, wireless terminals, Tap to Pay or hosted online checkout.

Secure payment terminals and hosted checkout systems encrypt card data immediately and prevent your business systems from accessing sensitive information. This reduces your compliance scope and simplifies validation.

More complex setups, such as virtual terminals or custom payment integrations, may require additional validation because your systems interact more directly with payment data.

Complete annual PCI validation

Most SMBs maintain PCI compliance by completing a Self-Assessment Questionnaire (SAQ) and submitting an Attestation of Compliance (AoC) each year. These documents confirm that your payment systems and procedures meet PCI DSS requirements.

These documents are submitted to your payment processor or acquiring bank to verify compliance.

PCI compliance is a shared responsibility. Payment providers secure payment infrastructure, encryption and card data processing, while your business is responsible for using approved payment systems, completing validation and following secure operational practices. Check out our guide on the shared responsibilities for merchants for more information.

Use secure payment systems

Secure payment terminals and hosted checkout systems encrypt card data automatically and prevent sensitive information from being exposed to your business systems.

Payment providers handle critical security functions such as encryption, transmission and secure processing. Your role is to use approved systems and follow secure procedures.

How businesses maintain PCI compliance over time

PCI compliance is not a one-time task. It’s maintained through consistent use of secure payment systems and simple operational habits that protect card data. Businesses that follow these practices and complete annual validation can continue accepting card payments without disruption.

  • Use PCI-compliant payment systems: Approved payment terminals and hosted checkout systems are designed to protect card data automatically. Continuing to use secure, PCI-compliant payment solutions reduces your compliance scope and makes ongoing validation much easier.
  • Keep payment devices updated: Payment terminals and POS systems should always run the latest approved software versions. Updates help maintain security protections and ensure your payment environment remains aligned with current PCI DSS requirements.
  • Limit access to payment systems: Only authorized staff should have access to payment terminals, POS systems or virtual terminals. Restricting access reduces the risk of unauthorized activity and helps maintain a secure payment environment.
  • Never store card numbers manually: Card numbers should never be written down, saved in documents or stored outside approved payment systems. Secure payment solutions are designed to handle card data safely so businesses do not need to store or manage sensitive information directly.
  • Use systems with tokenization: Modern payment systems replace card numbers with secure tokens that have no value if intercepted or accessed. This means your business does not store sensitive card data, which reduces risk and simplifies PCI compliance.
  • Physically secure payment terminals: Payment devices should be inspected regularly and protected from tampering or unauthorized modification. Keeping terminals secure helps prevent fraud and ensures payment systems continue operating safely.
  • Work with compliant payment providers: PCI-compliant payment providers handle critical security controls such as encryption, secure transmission and payment processing infrastructure. This allows businesses to focus on daily operations while maintaining secure, compliant payment acceptance.


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Make PCI compliance easier with Moneris

Moneris helps simplify compliance by securing card data through encrypted payment terminals, hosted checkout and PCI-compliant infrastructure designed for small and medium-sized businesses. This reduces your PCI scope and removes much of the technical burden of protecting payment data.

Our secure payment solutions reduce the amount of sensitive data your business handles directly, making compliance easier to maintain. We also help guide businesses through annual validation, including confirming which Self-Assessment Questionnaire applies to your setup.

And with secure payment solutions and expert support available 24/7 in English and French, Moneris helps your business maintain PCI compliance and accept payments with confidence.

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Moneris Team

Moneris Team

Moneris is a leading provider of payment processing solutions in Canada. Our blog is your go-to resource for insights into the ever-evolving world of payments. We cover everything from the latest industry trends and technologies to practical advice for businesses of all sizes. Our blog's mission is to spotlight small businesses and provide resources that help them succeed in today's economy. Blog articles are written by members of Moneris' in-house marketing team with support from internal product and industry experts.

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