Annual fee
A yearly charge some credit cards add to your bill just for having the card, whether you use it or not.
Many cards have no annual fee. Cards with one usually offer higher rewards or travel benefits in return. The fee only makes sense if the extra value you actually use is worth more than the fee.
To compare, divide the fee by the extra reward rate. A $95 fee for 1% more cash back needs $95 ÷ 1% = $9,500 of spending a year just to break even.