3 ms·Credit cards have fees -- interest, account-keeping fees, and so on. It's why banks like them.by etfb 13y agoCredit cards have fees -- interest, account-keeping fees, and so on. It's why banks like them.pfisch 13y agoOnly if you don't pay them off immediately, or you agree to an annual fee for specific benefits.lmm 13y agoDepends on the card. I've got one that charges interest on purchases even if they were made in that same month. (In general you're right though)