WHMCS can automatically charge your customers for renewals, removing the need to run credit card charges for renewed services manually.
Configure the PayPal Payments module. PayPal Payments processes payments, stores client PayPal® details, and enables faster checkout.
Configure product group features in supported order form templates to display details for all of the products within the product group.
Configure cross-selling recommendations to display product recommendations to customers based on their existing services and cart contents.
Configure the system cron job as part of the WHMCS installation process and make certain that its daily automation tasks always run successfully.
Configure billing based on use of resources like bandwidth or disk space. You can use this with cPanel & WHM, DirectAdmin, and Plesk.
Customize the time at which the system cron job runs and how often the system invokes it. The cron job must run at least once per day in order to complete the daily automation tasks.