Hi Jessica, on the Billing Settings page for a given account (https://partners.vendasta.com/businesses/accounts/AG-..../billing-settings ) , there is a payments options section where credit cards can be removed.

We don't have a way to pass along a fee for using credit cards, but if you're looking to incentivize instead of completely removing the option, you could consider setting up a small recurring discount on your customers' subscriptions after they successfully setup ACH payments.