Undergraduates with family income below $200,000 can expect to attend MIT tuition-free starting next fall, thanks to newly expanded financial aid. Eighty percent of American households meet this income threshold.

And for the 50 percent of American families with income below $100,000, parents can expect to pay nothing at all toward the full cost of their students’ MIT education, which includes tuition as well as housing, dining, fees, and an allowance for books and personal expenses.