Undergraduate federal student loan interest rates could fall below 3% for the first time in more than 15 years this July, based on the most recent 10-year Treasury note auction. At the same time, parents with 529 college savings plans may have seen...

More than 8 million federal student loan borrowers use income-driven repayment plans. These plans can drop payments to $0 based on a borrower's income and family size. And after 20 or 25 years — 10 if you work in public service — any remaining bal...