For Worldpay Partnerships: The credit card rate can be higher than our base processing rate of 1.25% because we use an IC+ structure, which is our rate of 1.25% plus the interchange rate of the card used to process. Interchange rates can vary widely depending on the card type and card holder your client uses and are updated twice a year. For example, American Express (AmEx) has notoriously high interchange rates, so in your Mosaic setting, we give you the option to not accept Amex. To also help you recoup some of the interchange fees and lower your overall processing rate, we allow automatic surcharging* up to 3% you can enable: Enabling Payment Surcharges
*surcharging not available to organizations based in CT,MA, ME, OK, and up to 2% in CO
For Stripe Partnerships: Stripe uses a blended rate structure. The key difference between blended rate and Interchange Plus (IC+) rate structures lies in how fees are presented and charged in credit card processing. A blended rate is a single, flat percentage fee (and sometimes a per-transaction fee) regardless of card type or brand. With the IC+ rate you pay the actual interchange fee (set by Visa, Mastercard, etc.) plus a fixed processor markup.