The short answer
A cash discount program posts a single price on every item — the price the merchant wants if the customer pays with a card — and then discounts at the register for customers who pay cash. The key legal distinction: you're not adding anything to the card-paying customer's bill (which would be a surcharge), you're subtracting something from the cash-paying customer's bill. That distinction is what makes cash discount legal in all 50 U.S. states and compliant with Visa, Mastercard, Amex, and Discover operating rules.
How it's structured
- Shelf / menu price is the card-paying price (e.g., $10.30 on a $10 item).
- Signage at entry and register must clearly state: "All prices include a 3% non-cash processing fee. A 3% cash discount is applied at the register for cash payment."
- Receipts show the full price, then the discount as a negative line item for cash customers.
- Card customers pay the posted price with no surcharge line item on the receipt.
Cash discount vs. surcharge — the legal line
The legal principle: discounts for cash have been explicitly protected since the 1981 Cash Discount Act (amending the Truth in Lending Act). Surcharges for card use were restricted until Visa's 2013 settlement. Many states still prohibit surcharging outright (Connecticut, Massachusetts, Maine) but have never prohibited discounting for cash.
If your signage or receipt ever uses the words "surcharge," "credit card fee," "non-cash adjustment," or adds a line item at checkout, you've crossed out of cash discount and into surcharge — with different (more restrictive) rules.
What operators need to know
- Signage is the #1 compliance point. Processors and acquirers audit cash-discount merchants specifically for signage. Missing or wrong signage gets the MID reclassified as non-compliant surcharging — chargebacks from confused customers follow.
- Debit cards complicate it. Under the Durbin Amendment regulated-debit caps, you can't discount against debit-card processing cost beyond what interchange actually is. Safer to apply the cash discount to credit-only or accept reduced recovery on debit.
- E-commerce is difficult. Cash isn't paid online. Cash discount at e-commerce usually means an ACH discount (pay with bank transfer, save 3%) instead. Legal but lower uptake.
- Amex specifically allows it. Unlike surcharging, where Amex historically had special rules, cash discount is uniformly allowed across all brands.
- Program registration. Some processors require you to register your cash-discount program before enabling it on your MID. Others don't. Ask before you turn on signage.
- Customer feedback matters. In card-present retail, cash discount rarely hurts sales. In full-service restaurants it can feel cheap. Match the tactic to your vertical.