There are a few reasons you might want to consider using multiple credit cards. Perhaps you want to take advantage of different rewards programs or keep your business and personal expenses separate. Whatever the reason, using multiple credit cards can be a smart financial move. If your card gets stolen, it will be easier to cancel it. The downside is that if one card has a higher interest rate than another, you'll pay more in finance charges by carrying a balance on the card with the higher rate. Finally, it's best not to use both cards at once because paying off debt is essential to building a good credit history.