I have been throwing a few big chunks of cash toward my student loans in recent months. When I spoke with the servicer on the phone (ACS), they told me that all extra payments automatically go toward principle. Their website also states this. When I pay extra, it moves my next due date back, and my next payment is currently showing due in 10/2016. The website gives me the option of resetting this due date--should I? I have autopay set up to send the minimum every month regardless, and I intend to keep throwing money at the loans as I can. My balance is now around 17k and I hope to have the whole thing paid off within a year.