What is a cash discount?
A cash discount is a lower price for customers who pay cash, taken off a posted price that already covers the cost of taking cards.
It's a close cousin of dual pricing. The difference is how the prices are shown: one posted price with a cash discount, instead of two prices side by side.
Not sure which one fits? See dual pricing vs cash discount vs surcharge side by side.
For example
A salon posts a haircut at $52. A client who pays cash gets a discount and pays $50.