The Discover it® credit card has a general 1% cash back on all purchases and some cards will allow you to earn a 5% cash back in rotating categories. For instance, each quarter you can save up to $75 on purchases in such categories like gas, restaurants and movies. Three months a year you will be able to earn 5% cash back on gas purchases. Note that every quarter you will have to sign up to activate the bonus cash back offers.
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All rates and fees, and other terms and conditions of the products mentioned in this article/post are actual as of the last update date but are subject to change. See the current products' Terms & Conditions on the issuing banks' websites.