Today many credit card issuers offer credit cards with cash back. And the most famous cash back credit cards are Discover cards. The minimum cash back you can earn using a Discover card is 1% cash back. To earn more cash back, you can get a credit card with rotating categories. Here you can earn 5% cash back. Or, if you do not like the perspective of signing up for each category, you can choose a credit card with 2% cash back on all purchases. You can compare Discover cards with other cash back credit card offers to see which one is the best option for you.