A small Seattle restaurant owner is facing a familiar question: absorb card-processing costs into menu prices, or add a charge specifically for customers paying by credit card.

The math is plain. The processor takes about 3.5% of each card transaction, including tax and tip, and covering that entirely through menu prices would mean an increase closer to 4.9% across the board.

For many diners, the bigger issue is not the percentage but when the charge appears. Higher posted prices tend to go over better because the full cost is on the table before ordering. A separate card fee can read as an unpleasant surprise at the end of the meal, despite advance disclosure.

That dynamic makes a cash discount look like a workable middle ground instead of a surcharge. The math can be similar, but the framing is different: customers paying cash or debit see a break instead of card users seeing a penalty.

The discussion also reflects how common card payments have become in restaurants. Many customers now expect to pay by credit card without a separate line item, and added fees can change how they think about tipping or whether they would return at all.

There are practical complications beyond customer reaction. Distinguishing between debit and credit is not always smooth at the counter, and cash brings its own handling costs and risks. Legal rules around card surcharges can also vary, so any restaurant considering that route would need to make sure the policy is allowed and clearly posted.

The clearest takeaway: Seattle diners may accept a higher menu price more readily than a fee that appears at checkout. If a restaurant still wants to separate the cost, a clearly advertised cash discount may be the cleaner sell.