<prompt> Human: I recently had to make a 300 purchase. I was just paid, and wondering if I can pay it off now or do I have to wait until it becomes due?  <response>: You have until the due date to pay, and if so, you will pay no interest. Pay off each month, and you will do well. No harm to paying off early- probably good in fact, as you wont spend money you dont have. 