How does this display on the official invoice PDF?

The surcharge or cashback discount is rendered as a clean, transparent line item on the invoice and invoice PDF with full VAT/Tax support.

billing Addonv1.0.0Fee Optimization

Payment Gateway Charges & Incentives

Automate gateway surcharges, tiered volume discounts, and instant cashback rewards across WHMCS checkout.

Take full control of payment processor merchant fees. Automatically apply fee surcharges for costly payment channels or reward customers with instant credit cashback for choosing low-cost crypto or direct bank transfer methods.

4.8 / 5(19 reviews)

210+ Hosts active deployments

IonCube Loader v13+ Certified

whmcs.modulepark.com/admin/addonmodules.php?module=payment-gateway-charges

Live WHMCS Console

Payment Gateway Charges & Incentives WHMCS Dashboard Screenshot

Core Engineered Capabilities

Fixed, Percentage & Combined gateway surcharge calculations on checkout invoices

Progressive tiered rates based on invoice subtotal and payment currency

Instant client credit cashback rewards for choosing low-fee payment methods

Granular filtering by Client Group, Currency, Amount, Product Category & Country

Live Fee & Cashback Simulator tool for WHMCS admin testing

Dynamic real-time fee recalculation on cart.php and viewinvoice.php

Full compliance with itemized invoice lines and tax handling

Read Setup Documentation Check PHP & WHMCS Matrix

Select License Plan

Transparent Pricing

IonCube 13+

Annual License

12 months of automated updates, security patches, and SLA support.

$29

Billed annually

Automated 1-Click Updates

3 Free Automated Reissues / Year

7-Day Offline License Resilience

PHP 7.4 through PHP 8.4 Support

Order License via Client Area

Instant Automated Provisioning via client.modulepark.comIonCube Loader 13+ Verified

System Engineering Matrix

Technical Specifications & Compatibility

Technical Specifications & System Requirements

Verified Enterprise Grade

PHP Runtime SupportRuns on PHP 7.4 through PHP 8.3 with continuous testing for PHP 8.4.

PHP 8.2 & 8.3 (PHP 8.4 via IonCube 14)

WHMCS CompatibilityVerified across all recent minor and major WHMCS core releases (7.8 — 9.0+).

WHMCS 8.0 - 8.11 & 9.0+

Encryption & Bytecode SecurityCompiled with official IonCube Loader v13+ toolchain for enterprise security.

IonCube Loader v13+ (Enterprise Encoded)

Offline Grace PeriodCryptographic token cache protects server provisioning during network maintenance.

7-Day Offline Verification Cache

Code ArchitectureStrict PSR-4/PSR-12 namespace compliance with dependency injection and clean hooks.

PSR-12 / WHMCS Hook Pipeline

Update Mechanism1-click automated updates directly inside WHMCS Admin via ModulePark Manager Hub.

1-Click Auto-Updater via ModulePark Hub

Release History

Changelog & Updates

v1.0.0Stable ReleaseOct 02, 2026

Initial release with combined fixed + percentage calculations
Added instant credit balance cashback engine upon invoice payment
Live Admin Fee Simulator for immediate rule verification

Technical Inquiries

Frequently Asked Questions

Yes! You can either set a fee discount that reduces the total invoice amount or issue the savings as instant prepaid credit into the client's wallet upon invoice payment.

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