Below, Select takes a look at what a credit card sign-up bonus is ... you pay off any large balances quickly so you don't accrue interest that offsets the value. Here's some math to show how ...

Discover cards are currently not available on CNBC Select and links have been redirected to our credit card marketplace where you can review offers from other issuers like American Express or Chase.

One type of credit card—the 0% annual percentage rate credit card—can even work as a type of interest-free loan when you use it for purchases. Some cards in this niche let you avoid interest ...

Current credit card interest rates are sitting at a high ... offer to help me chip away at the cost over time (and earn the sign-up bonus),” says Bankrate editor Nouri Zarrugh.