Glossary · Financial Aid
Need-Based Aid
Financial aid awarded based on the family’s demonstrated financial need, calculated as the difference between the school’s Cost of Attendance and the Student Aid Index (SAI) from FAFSA or the CSS Profile assessment.
What it means
Need-based aid fills the gap between what a school costs and what a family can pay according to the federal formula. The calculation is straightforward: COA minus SAI equals demonstrated need. How much of that need the school actually covers depends on the school’s resources and policies.
Wealthy schools that meet full need cover 100% of the gap with grants (and sometimes loans). Less-endowed schools might cover 60-70% of demonstrated need, leaving a "gap" the family must fill with additional loans, savings, or outside scholarships.
Need-based aid includes federal sources (Pell Grant up to $7,395 in 2025-2026, SEOG, Federal Work-Study, Direct Loans) and institutional sources (the school’s own grants). The federal components are consistent across schools. The institutional component varies enormously. This is why two students with the same SAI can receive $50,000 in total need-based aid at one school and $12,000 at another.
Worked example
A family has an SAI of $15,000. At Boston College (COA $84,000), demonstrated need is $69,000. BC meets roughly 100% of need: $62,000 in institutional grants, $5,500 in Federal Direct Loans, and $2,000 in work-study. Net cost: approximately $15,000. At a regional private with a $45,000 COA, demonstrated need is $30,000, but the school only meets 55% of need: $14,000 in institutional grants, $5,500 in loans, and $2,000 in work-study, leaving an $8,500 gap. Net cost: $23,500. The cheaper school costs more out of pocket.
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