<prompt> Human: Im taking a sequence of three graduate courses at a college. My parents have paid for the first two with leftover undergrad 529 money, but Im hoping to be able to pay for the third myself. relationship reasons, irrelevant. I have a credit card Discover student card, rotating 5 category one with a 2k limit on it, tuition will be about 3.5k. college doesnt seem to charge extra fees for paying with credit card -- it was actually the only way to pay for the summer class. I have more than enough in savings to just pay the card balance immediately, and that way Ill get 1 back. Pretty new to credit cards, though, so Im wondering how hard the 2k limit is. Ie, will Discover just bouncerefuse the charge? Can I call them ahead of time so this doesnt happen? Im going to request a credit line increase before the payment deadline for the class, though I doubt theyll raise it to past 3.5k straight off...Also open to trying to get a new card with a higher limit, now that Ive got a credit history etc, but I dont want to open a new card just for the purpose of something Ive got a way to do without.  <response>: Totally worth it to open a new card for the sign up bonus, as long as you pay it off before interest kicks in. 