Chargify bills your customer's credit card on whatever schedule you have defined. In addition to processing one-time and recurring transactions, Chargify can handle free trial periods, one-time fees, promotions, refunds, email receipts and even dunning (reminders for failed credit card payments).

In order to actually bill your customers, Chargify acts as an intermediary between your website and payment gateway. You can create subscription plans, integrate them into the signup process on your website, and then Chargify initiates transactions for the correct amount with your payment gateway.