What’s the best way to make additional payments to pay off student loans fast? Make your regular payment on time via auto-pay and then schedule another extra payment for the next day. Under federal regulation, lenders apply your payment to late charges or collection costs for your loan, then to any outstanding interest accrued since your last payment, and then to your principal. Private lenders typically follow suit.
Variable Rates: Starting variable rates range from 2.93% to 11.57% APR (with autopay), and will never exceed 13.95% (sometimes lower in certain states as required by law). For variable rate loans, the variable interest rate is derived from the one-month LIBOR rate plus a margin of between 0.86% and 9.76%. The current one-month LIBOR rate is 2.27%. Changes in the one-month LIBOR rate may cause your monthly payment to increase or decrease. Interest rates for variable rate loans are capped at 13.95%, unless required to be lower to comply with applicable law.	Zero fees, period. 

to be employed full-time at a qualifying public service organization (federal, state or local government agency, entity or organization, federal, state or local non-profit organizations with a 501(c)(3) designation, military service, emergency management, public safety or law enforcement, public health services, public education or public library services, school library or other school-based services, public interest law services, early childhood education, public service for individuals with disabilities and public service for the elderly)

You can discuss your repayment options with your lender. If you are unable to make payments while you are in-school, you do have the option to defer repayment on your loan until you are out of school. This option will obviously cost the most money because any unpaid (accrued) interest that is not paid before the end of your grace period will be capitalized — or added — to your outstanding principal balance prior to the start of repayment.
No, as long as you continue to work full-time for a government or not-for-profit agency (and meet all the other requirements), a second job won’t impact your eligibility. That said, the additional income from the second job will probably cause your payment to go up assuming you’re on an income-driven repayment plan (which you should be if you want PSLF.)
If you or your recent grad has this type of loan—which makes up 15 percent of total U.S. education debt—this may seem like an odd move. After all, the interest rates on variable private loans (given by banks and credit unions) are currently lower than the fixed rates on federally backed and private loans. But historically this situation is unusual, and if the economy improves, interest hikes are probable in the near future. “Rates could climb 5 to 6 percent over the next four years, making your monthly burden unmanageable,” says Kantrowitz. That’s why it’s wise to unload these balances as soon as possible. If you can, pay twice the required amount until you have eliminated this debt and make only the minimum monthly contribution toward your fixed-rate federal loans, since those rates cannot increase.

Capitalized interest on student loans happens when your loan servicer adds unpaid interest to your total loan balance. This makes your balance increase and then accrue even more interest. To put it simply, you pay interest on your interest and it can cause you to owe more than the amount you originally borrowed. This happens when you defer or forbear your student loans.
Before you take out a loan, it’s important to understand that a loan is a legal obligation that makes you responsible for repaying the amount you borrow with interest. Even though you don’t have to begin repaying your federal student loans right away, you shouldn’t wait to understand your responsibilities as a borrower. Get the scoop: Watch this video about responsible borrowing or browse the tips below it.