3 ms·untaxed? really? I thought you were supposed to report and pay taxes on all income.by lsc 14y agountaxed? really? I thought you were supposed to report and pay taxes on all income.roel_v 14y agoDiscounts are not income.lsc 14y agohm. Interesting argument against the 'cash back' cards. The context I've heard of people getting in trouble with this is when they used the card for business purchases and then used the discounts for personal purchases.