When taking out student loans, it is often difficult to determine exactly how much money you need for the school payment, housing and other expenses. If, when you finish school, you still have money leftover that you don't want to pay interest on, it is possible to return the student loan money to the lender. This is done in the form of a payment, but because you are given several months after graduation (typically six) before you must begin paying the money back, applying all the money to a payment is the same as returning it.

Log onto your Internet account with the financial institute that gave you your money. If you have not yet established an online account, select "Create Account," then type in your name, address, Social Security number and the billing number found on the statements you receive regarding your student loans. Choose a user name and password; then submit the information.

Select "Make a Payment." Even through your payments are not yet required, it is still possible to apply money to your loans.

Type in your banking information, including the routing and banking number found on your account.

Enter the amount of money you have leftover. This may be anything from a few dollars to several thousand dollars. Click "Apply," and you are asked if you sure you want to make the payment. Click "Yes." The payment is sent to the student loan company, and the amount is subtracted from the overall amount you owe.