Most cash back rewards are earned as a percentage of your purchases, with some programs offering higher cash back rates for purchases in specified bonus categories. (cardrates.com)
For businesses with very high office supply or fuel expenses, that can be more beneficial than cards with higher cash back rewards but lower spending caps. (lendedu.com)
Some of them require you to sign into the program once every three months to take advantage of higher cash back amounts on certain categories of purchases. (creditdonkey.com)