The title of this thread has been edited from the original: charging Square fee to customer
Is there a way to set up items in store so that the Square fee gets added on to the purchase price (i.e. so that customer is paying Square fee)?
there is not a way to do this automatically.
also depending on the state you are in it is illegal to pass on the Credit card fee to the customer so you need to research that.
here are a few threads that discuss this idea.
Square Community