I don't use my credit card at the grocery store. I used to use debit card every week, but I was sick and tired of being scared that somehow my debit card would be declined due to a compromise of my account or technical difficulties. Now I pay cash, but do you ever get worried that all of your groceries will stay there and get embarrassed because you couldn't pay the cashier? I tend to calculate my bill as I shop and check my balance on my phone before I check out to make sure that I haven't overspent. That way I don't have to deal with these kinds of issues. I never use credit cards at the grocery store because I don't believe that I should be using credit to pay for every day expenses. It's a bigger thing for me to think that I owe money out for groceries and that something might happen and I won't be able to pay it off.