FAFSA Student Aid Index Calculator
The Student Aid Index (SAI) is what colleges use, alongside the cost of attendance, to decide your eligibility for need-based federal aid. It combines parent and student contributions from income and assets, computed with published allowances and assessment rates that change each award year. This calculator sums the contribution components you derive from the official FAFSA formula guide, produces your SAI (which can be as low as negative 1,500), and estimates your financial need against the cost of attendance you enter.
Student Aid Index formula
Parent contribution = parent income + parent assets
Student contribution = student income + student assets
SAI = parent contribution + student contribution (floor of -1,500)
Estimated need = max(0, cost of attendance - SAI)
Each contribution component should come from the official FAFSA formula tables. The SAI is floored at negative 1,500, and financial need is the cost of attendance minus the SAI.
FAFSA SAI context
- The SAI replaced the Expected Family Contribution beginning with the 2024-25 FAFSA.
- It can be as low as negative 1,500, signaling high financial need.
- Income protection allowances and asset assessment rates are published each award year.
- Financial need equals the cost of attendance minus the SAI.
- Schools build aid packages (grants, work-study, loans) around your calculated need.
FAFSA SAI: frequently asked questions
What is the Student Aid Index?
The Student Aid Index (SAI) is the figure colleges use, with the cost of attendance, to determine your eligibility for need-based federal student aid. It replaced the Expected Family Contribution starting with the 2024-25 FAFSA. A lower SAI generally means more aid eligibility, and the SAI can be as low as negative 1,500.
How is the SAI calculated?
The SAI combines the parent contribution from income and assets (for dependent students) and the student's own contribution from income and assets. Federal Student Aid applies allowances and assessment rates from published tables to each component. This calculator sums the contribution components you enter, so you can use figures from the FAFSA formula guide.
How does SAI relate to financial need?
Your financial need equals the college's cost of attendance minus your SAI. Schools build aid packages (grants, work-study, and loans) to help cover that need. A lower SAI relative to a higher cost of attendance produces greater calculated need.
Can the SAI be negative?
Yes. Under the current formula, the SAI can be as low as negative 1,500. A negative SAI signals especially high need and can help schools identify students for additional aid. This calculator allows a negative result when contributions are low.
Where do I find the assessment rates and allowances?
Federal Student Aid publishes the SAI formula, including income protection allowances and asset assessment rates, each award year. Use the official EFC/SAI formula guide to compute each contribution component, then enter them here. The figures change yearly, so this tool keeps them as editable inputs.
Official sources
- Federal Student Aid: How aid is calculated.
- Federal Student Aid: StudentAid.gov.
Reviewed by the CalculatorHub team, edited by James Graham, 17 June 2026. See our methodology.