According to the deal, undergraduates taking out loans this fall will pay just 3.86% in interest on new loans for this school year -- cheaper than the 6.8% interest rate that kicked in on July 1. The new rates would apply for loans taken out after July 1.
But student advocates don't like the deal, because rates are expected to rise in coming years.
"It's a missed opportunity, because this is going to cost students more than leaving current rates in place," said Lauren Asher, president of the Institute for College Access & Success, a nonprofit that advocates for more affordable higher education.
Under the deal, a high school senior who takes out college loans in 2017 would see interest rates as high as 7%, higher than current law. And by 2015, graduate students would pay more in interest than is set by current law.
On July 1, the rate for unsubsidized loans doubled from 3.4% to 6.8% affecting 7.4 million students. Unsubsidized loans are awarded based on financial need and account for about 26% of all college loans made by the government, according to the Congressional Budget Office.
Far more loans are unsubsidized and others are lent to graduate students who were already paying 6.8% interest rates. Their rates were unchanged on July 1.
Senators from both political parties said Thursday's deal will help all students this year - those getting subsidized and those getting unsubsidized Stafford loans.
Student loan interest rates could double
"It would give all undergraduate students the same interest rate," said Sen. Dick Durbin, the no. 2 Democrat in the Senate. "Most students borrow from both (loan programs) and many of them face much higher interest rates on the unsubsidized loans. We're going to help those students."
For loans this fall, undergraduate students would pay an overall interest rate of 3.86%, comprised of the June 1 yield on the 10-year Treasury note plus 2.05% extra. Graduate students will have to pay 5.41% on loans this fall, which is 3.6% over Treasury notes auctioned on June 1.
Every year that the economy improves and interest rates rise, the Treasury notes will rise. And so would student loan rates under the new deal. However, loans for undergraduates will be capped at 8.25% and for graduates at 9.5%.
Over 10 years, the bill will raise $715 million that will go toward reducing deficits, all from students paying higher interest rates than current law allows.