The Square Gateway Module for WHMCS allows you to securely accept credit and debit card payments via Square, directly within your WHMCS installation. Designed for smooth integration, this module supports automated billing, multi-currency processing, refunds, and real-time transaction updates — all while maintaining full PCI compliance.

By leveraging Square’s trusted infrastructure, this gateway provides a seamless checkout experience for your clients and powerful management tools for your team.

Integration with WHMCS

• Connects your Square account using OAuth authentication
• Adds Square as a payment gateway option in WHMCS
• Supports automatic payment collection on invoice due dates
• Enables real-time transaction logging within WHMCS
• Offers client-side card management for future billing
• Provides admin tools to refund transactions from the WHMCS dashboard
• Fully compatible with recurring billing and subscriptions

Key Features

• Global Support United States, Canada, United Kingdom, Japan, and Australia
• Multi-Currency Support Accept payments in Square-supported currencies
• Secure Credit & Debit Card Processing Visa, Mastercard, AMEX, and more
• Real-Time Payments Instant payment verification and logging
• Saved Cards Clients can securely store payment methods for future use
• Automatic Payments Recurring billing for active services
• Refund Support Full or partial refunds directly from WHMCS
• PCI-Compliant All card data is handled securely via Square APIs

Card Payment Support Updates

• The module now supports both normal card payments and 3D Secure (3DS) authenticated card payments, ensuring broad compatibility and enhanced security.

• Normal Cards (Non-3DS)

  • One-time payments
  • Recurring payments
  • Card saving (vaulted cards)
  • One-time card save functionality

• 3D Secure (3DS) Cards

  • One-time payments
  • Card saving (vaulted cards)
  • One-time card save functionality
  • Note: Recurring payments are not supported with 3D Secure (3DS) cards due to authentication requirements.

Benefits

• Seamless payment experience directly within WHMCS
• Streamlined recurring billing and client card storage
• Manage payments and refunds without leaving WHMCS
• Reduce manual effort with automated workflows

Frequently Asked Questions

• Q: Does this module support recurring payments?

• Yes. WHMCS will automatically charge saved cards for recurring invoices.

• Q: Can customers manage their saved cards?

• Yes, customers can view, add, or delete saved cards from the client area.

• Q: Is it compatible with WHMCS 8.x and later?

• Yes, the module is actively maintained for WHMCS 8.x+.

• Q: Is sandbox/test mode available?

• Yes, Square's sandbox mode is supported for development and testing.