The recurring payment option is a fixed amount that the customer tentatively agrees to pay each month (or period). In order to do what you are trying to do, the client must first agree to pay any amount that you decide to charge at a later time. This means pre-authorization of an unknown payment amount, which will not be allowed by any payment service.
Only the following options are possible:
- Schedule a variable amount each month (i.e. subscription).
- Set up a subscription where the maximum amount of the monthly amount can be billed, and then monthly refunds the difference.
Good luck C # 2 - I would never agree to such as a client, personally.
Musigenesis
source share