For most purchases, Costco only accepts Visa credit cards — meaning you can't use a Mastercard or Amex to pay. An exception ...

Terms apply. If groceries, gas and online shopping are significant parts of your budget and you refuse to pay an annual fee, this card is a fine choice.

The card features unlimited 2% cash back on all purchases, a sign-up bonus and a 0% intro APR promotion. When it comes to flat-rate cash-back cards, it's hard to beat 2% back, especially when the ...