What the Student Aid Index means for your grants

What the index is built to measure

The FAFSA produces the Student Aid Index from income, assets in some cases, family size and other answers, using tax data the IRS shares with your consent. The result appears on your FAFSA Submission Summary. It is a measure for aid formulas, and it does not tell you how much your family will pay.

The index can be zero or even below zero for students with the lowest incomes. Colleges subtract it from the cost of attendance to estimate financial need, and every need-based federal grant on an offer starts from that calculation.

How each federal grant reads the index

The Pell Grant uses the index most directly, since a lower number points toward a larger grant. Some students receive the maximum based on family size and income measured against the federal poverty guideline. Under the 2025 federal law, a very high index can rule out Pell starting in 2026-27, so ask the aid office how the newer rules apply.

FSEOG goes first to Pell recipients with the lowest index at each school, so a small difference can affect your place in line. Many state grants also use the index, often with a cutoff the state agency publishes each year.

When the number looks wrong

Errors usually come from a mistyped answer, a missing contributor or the wrong household size. You can correct the FAFSA on studentaid.gov, and each school on your form receives the updated result.

The index reflects income from two years before the award year, which can be out of date after a job loss, a divorce, a death in the family or large medical bills. A financial aid administrator can use professional judgment to adjust the data for special circumstances when you provide documents. Each school decides on its own, so ask every college you are considering.