While the Discover Business Credit Card offers no annual fee and respectable rewards is certainly appealing, as you might expect there are some limitations to be mindful of when making your selection. In this case, what are some of the other Cash Back Business Cards offering as far as office supplies and gas rewards? The Discover Business Credit Card faces stiff competition from the likes of American Express Simply Cash and Chase Ink Cash. Cardholders will earn 5% cash back on office supplies and 2% on gasoline, however you can only earn up to $2,000 in annual spend on each category. Amex Simply Cash offers up 5% cash back on office supplies, up to $12,000 in annual spend in this category, not to mention 3% rebates on gasoline for up to $12,000 in annual gasoline spending. Fellow Cash Back Business credit card peer Chase Ink Cash pays out 5% rebates on offices supplies, and also cellular, land-line and cable service for up to $25,000 in annual spend on these categories, in addition to 2% on gasoline and dining for up to $25,000 in annual spend. At the end of the day, the Discover Business Credit Card is decent, but perhaps outmatched in key areas by Amex Simply Cash and Chase Ink Cash.