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Is it bad etiquette to use a credit or debit card to pay for single figure amounts at the POS
Intellectually and logically, it shouldn't bother me for a second to charge something for a buck.  It's a losing proposition for the merchant, but their immediate business costs should be of little concern to me.  (They're making a choice to sell that item to me at that price and by accepting that means of payment, right?)  but the more I charge as opposed to paying cash, the more cash back I get. In my old-ish age, I've gotten a little softer and will pay cash more often for smaller amounts because I understand the business costs, but it's not a matter of caring what other people think. Accepting credit cards, or not, is a business decision.  It's usually a good one.  But with that decision come the rules, which up until about a year ago, meant that merchants couldn't set a minimum charge amount.  Now that's not the case; merchant account providers can no longer demand that their merchant clients accept all charges, though they are allowed to set a minimum amount that is no lower than $10.00. In the end, it's a matter of how much you're willing to pay in order to influence people's thinking of you, because the business/financial benefits of doing one or the other are pretty clear.