Currently, there are two fees for Stripe payments through zcal:
zcal platform fee - Currently this is set at a flat 3% rate. This goes towards continued development and costs associated with building and maintaining zcal. You might see this as the “application fee” in your Stripe dashboard
Stripe fee - This is the fee Stripe takes for all transactions that go through its platform. Currently, it is at 2.9% + $0.30 per successful card charge. There is more information on the Stripe website.