The Constituent Field question type “Payment” has an option to process payments. These payments can either be a Fixed Price, for example an application fee, or you can set it to Make a flexible amount where the respondent writes in an amount to pay or donate. There is also an option for Authorization Only, which allows the credit card to be collected, but not charged, but not immediately charged. Authorization only just saves the credit card in the constituent's Payment Options tab for a future purchase/payment.
The survey thank you message can include a merge field for the payment amount if you wish it to serve as the transaction acknowledgement.

The example below shows a fixed price for an application fee. When the survey is submitted, the charge will show on the Transactions grid and in the constituent's Transactions tab. It will be processed as a General type of transaction with a Online Category of Donation, but the name of the survey will be shown in the Online Subcategory field.
