Firstly, you need to enable payment method surcharge by going to Set up -> Edit Configuration, change value "Enable Payment Method Surcharge" to true.
Secondly, go to Set up -> Edit Credit Cards. The credit card types you create here will be the accepted credit card types for payment method "Credit Card - Offline Processing".
Select modify button on the Credit Card you want to add surcharge. Enter Base Surcharge, Percentage and Surcharge Description.
Surcharge is calculated by:
Code:
Base Surcharge + Percentage * Order Balance
.
If you want to offer discount for the payment method, enter Percentage as the negative value.
Order Balance is Total Order Amount (including postage and taxes) take away the gift certificate amount. If the Order Balance is 0, no surcharge or discount will be given to the customer.
Surcharges for other payment methods (e.g. Paypal, Paymate) Should be defined via Set up -> Edit Payment Methods.
If payment method surcharge is enabled, everytime when the payment method or credit card type is changed by selecting from the payment method or credit card type drop down list at checkout, the check out summary page will be refreshed and the surcharge will be recalculated.
Available from OpenStores 3.2.1.