There is a number in the federal college-cost data that looks like a mistake: a price with a minus sign.
It is not a mistake, and we are not rounding it up to zero. A negative net price means that for the average aid-receiving family in that income group, grants and scholarships exceeded the entire cost of attendance — tuition, housing, food, books, all of it — and the remainder went toward other expenses. The posted price and the paid price are not just far apart at these schools. For the lowest-income families, they point in opposite directions.
The list
Of the 557 universities in our catalog that report an average net price for families earning under $30,000, nine report a figure below zero:
| University | Avg. paid, family income under $30k | Posted cost of attendance |
|---|---|---|
| University of Pennsylvania | −$3,012 | $89,028 |
| Williams College | −$2,610 | $81,164 |
| Stanford University | −$2,536 | $82,162 |
| MIT | −$2,533 | $82,730 |
| California Institute of Technology | −$2,133 | $86,886 |
| Washington and Lee University | −$1,777 | $87,000 |
| University of Chicago | −$1,264 | $90,360 |
| Colegio Universitario de San Juan | −$982 | $6,024 |
| Brown University | −$420 | $87,648 |
Two schools go further: Williams and Caltech are below zero for the $30k–$48k income group as well — Caltech''s average there is −$2,886, lower than its under-$30k figure. And two more, Johns Hopkins and Duke, are positive for the under-$30k group but dip below zero in the $30k–$48k band.
One row on this list is not like the others. Colegio Universitario de San Juan is a small public institution in Puerto Rico with a posted cost of about $6,024 — low enough that a federal Pell Grant alone can exceed it. The other eight are among the most expensive schools in the country doing it on purpose, with posted prices above $80,000.
Why this happens
These schools price by household, not by seat. The $89,028 is real for a family that can pay it. For a family under $30,000, the same seat carries a grant package larger than the bill. The average lands below zero because aid budgets at these schools are built to cover living costs, not just tuition.
The posted price is a ceiling almost nobody touches. What decides your bill is which line of the income table your family is on.
What this is not
It is not a quote for your family. These are averages across aid-receiving students in an income band, and a family sitting near a band''s edge can land far from its average. It also excludes international students, who are not eligible for US federal aid and typically pay much closer to the posted price. For a figure built from your own numbers, every US college is required to host a Net Price Calculator, indexed by the Department of Education at collegecost.ed.gov.
And it says nothing about getting in. Every mainland school on this list admits fewer than 15% of applicants; the generosity is downstream of an admission most applicants will not receive. The money story and the admission story are separate columns, and this article is only about one of them.
Sources
Every figure comes from College Scorecard, the US Department of Education''s public dataset: average net price by family income for students receiving federal aid, and each school''s published cost of attendance. The same figures appear on each school''s page in our catalog with a link to the federal source. Where a school reports nothing for an income group, we show nothing — no figure above is estimated.