How Financial Aid Is Actually Calculated
Families routinely decide not to apply for aid because they assume they earn too much. The formula doesn't work the way they think, and not filing is the only guaranteed way to get nothing.
Two numbers, one subtraction
The FAFSA collects income and asset information and produces a single figure: the Student Aid Index, which replaced the older Expected Family Contribution.
Each school then computes its own cost of attendance — tuition, fees, housing, food, books, transport. Your need at that school is cost of attendance minus the Student Aid Index.
The consequence catches people out: because cost of attendance varies enormously between schools, the identical family can show substantial need at an expensive school and none at a cheap one. The Index is about you; the need is about you and the school together.
There is no income cutoff. A high cost of attendance can produce need at income levels people assume disqualify them.
File it anyway
The FAFSA is the gateway to more than need-based grants. Federal Direct Loans — including unsubsidized loans, which aren't need-based at all — require it. Many states and institutions use it for their own aid, and some scholarships require it on file.
It's also the mechanism for work-study eligibility, and for the professional-judgement process if your circumstances change mid-year: a job loss, a medical event, a death in the family.
The cost of filing is an hour. The cost of not filing is every one of those doors, closed by default.
The FAFSA produces a Student Aid Index. Aid eligibility is the school's cost of attendance minus that index — so the same family gets different numbers at different schools.
Sources
- Filling Out the FAFSA Form / Federal Student Aid Estimator — Federal Student Aid, U.S. Department of Education (2026)
- Subsidized and Unsubsidized Loans — Federal Student Aid, U.S. Department of Education (2026)