Why I have 21 credit cards, and how I decide which ones to keep Close icon Two crossed lines that form an 'X'. It indicates a way to close an interaction, or dismiss a notification. Canceling a credit card can impact your credit score. Crystal Cox/Business Insider This page includes information about the Discover it® Cash Back product, which is currently not available on Insider and may be out of date. Personal Finance Insider writes about products, strategies, and tips to help you make smart decisions with your money. We may receive a small commission from our partners, like American Express, but our reporting and recommendations are always independent and objective.