The first day following a missed student loan payment, your student loan becomes past due (i.e., delinquent) until you either repay the past due amount or make other arrangements with your creditor. Remaining delinquent for 90 days or more will result in your loan servicer reporting the delinquency to the three major national credit bureaus. Following a certain period of delinquency, which varies based on the type of loan, there is also a risk of the loan going into default.