Quoted from transprtr4u:I could claim some of these charge to business % in my corporate taxes as a cost of doing business. So never passed that portion to customers
That still results in you eating a net portion of the processing fee (unless your tax rate is 100%!), so you’re being generous to your customers.
As a piano tuner, for 20 years I’ve never accepted credit cards because of processing fees. It’s cash or check payment only with me.