Tool · SAI Estimator
What Will the FAFSA Say Your Family Can Pay?
Enter eight numbers from your tax return and household. This tool estimates your Student Aid Index using the simplified 2024-2025 federal formula, with a full breakdown of every step in the calculation.
The Student Aid Index replaced the Expected Family Contribution in the 2024-2025 FAFSA cycle. It’s the number the government uses to estimate what your family can contribute toward college costs. This tool gives you a rough SAI estimate without filling out the full FAFSA. Enter eight numbers, household size, income, taxes paid, savings, student income, student assets, and the tool produces an estimate using the simplified federal formula. The SAI is not what you’ll actually pay. It’s the starting point schools use to calculate your need-based aid package. A family with a $45,000 AGI, two parents, one student in college, and modest savings will typically see an SAI under $5,000, which means most schools will offer need-based aid to cover the gap between that number and their Cost of Attendance. The FAFSA itself is the only official source. This is an estimate.
Parent contribution
Available income = AGI minus federal income tax paid minus the income protection allowance for your family size. 12% of reported non-retirement assets is added on top to form adjusted available income (AAI), which is assessed on a bracketed scale:
- First $20,600 of AAI at 22%
- $20,601 to $25,800 at 25%
- $25,801 to $31,000 at 29%
- $31,001 to $36,300 at 34%
- $36,301 to $41,500 at 40%
- Above $41,500 at 47%
Income protection allowances
- Family of 2: $27,600
- Family of 3: $34,350
- Family of 4: $42,430
- Family of 5: $50,060
- Family of 6: $58,560 (each additional member adds $6,610)
Parent assets
12% of non-retirement assets is added to adjusted available income. The published asset protection allowance is $0 at every parent age, so all reported assets count.
Number in college
The FAFSA Simplification Act removed the number-in-college division from the federal formula starting with the 2024-25 award year — the parent contribution is no longer split between siblings enrolled at the same time, which raised the SAI for many multi-student families. Some schools that use the CSS Profile still consider multiple children in college for their own institutional aid, so it is worth asking each aid office directly.
Student contribution
Student income above the $11,130 protection allowance is assessed at 50%. A student with little or no income produces a negative income contribution (floored at -$1,500), which can slightly reduce the family’s SAI. Student assets are assessed at 20% with no protection allowance.
Minimum SAI
The SAI can go as low as -$1,500. A negative SAI signals the highest level of financial need and qualifies for the maximum Pell Grant.
What this tool does not include
- Payroll tax allowance (Social Security and Medicare), which lowers the SAI further for families with wage income
- Employment expense allowance for working parents
- Annual child support received, which the FAFSA counts as a parent asset
- Business and investment-farm net worth adjustments
- Maximum and minimum Pell Grant determinations based on family size and the federal poverty line
The FAFSA itself applies all of these adjustments. This tool uses the core formula to give you a directional estimate.
What the SAI means for your college list
Your SAI is not your bill. It is the number each school subtracts from their Cost of Attendance to determine how much need-based aid to offer you. A school with a $78,000 COA and your SAI of $12,000 sees $66,000 of demonstrated need. Whether they meet 100% of that need, and whether they meet it with grants or loans, depends on the institution.
Schools like Princeton, MIT, and Stanford meet 100% of demonstrated need with grants (no loans). Schools like University of Alabama or TCU may gap your need but offer strong merit aid that does not depend on SAI at all. The SAI tells you one side of the equation. The school’s aid policy tells you the other.
Frequently asked questions
What is the Student Aid Index?
The Student Aid Index (SAI) is the number the federal government calculates from your FAFSA to estimate what your family can contribute toward college costs. Schools subtract your SAI from their Cost of Attendance to determine your financial need. A lower SAI means more need-based aid eligibility. The SAI replaced the Expected Family Contribution (EFC) starting with the 2024-2025 FAFSA cycle.
How is SAI different from the old EFC?
Three major changes. First, the SAI can go negative (down to -$1,500), while EFC bottomed out at zero. A negative SAI signals the highest level of need and qualifies for the maximum Pell Grant. Second, the sibling discount is gone: the parent contribution is no longer divided by the number of students enrolled in college at the same time. Third, the new FAFSA simplified the question set and changed how certain assets and income are counted.
Can my SAI be negative?
Yes. The SAI can go as low as -$1,500. This happens when a family's income is low enough that the formula produces a negative result after subtracting the income protection allowance, taxes paid, and applying the assessment brackets. A negative SAI qualifies for the maximum Pell Grant ($7,395 for 2024-2025) and signals to schools that the family has the highest level of demonstrated need.
Does this tool replace the FAFSA?
No. This tool produces a rough estimate using the simplified core formula. The actual FAFSA applies additional rules including income protection allowances, payroll tax allowances, exemptions from asset reporting for qualifying lower-income families, and the provisions that guarantee a maximum Pell Grant based on family size and the federal poverty guidelines. The only official SAI comes from submitting the FAFSA itself. Use this tool to get a directional sense of where you stand before filling out the full form.
How does number in college affect SAI?
It no longer changes the federal SAI. Starting with the 2024-2025 FAFSA, the parent contribution is no longer divided by the number of children enrolled in college at the same time — a major change from the old EFC formula, which split it between siblings. Families with overlapping college years lost that discount in the federal formula. Some CSS Profile schools still consider multiple children in college when awarding their own institutional aid, so ask each school how it treats siblings directly.
Your SAI is one piece of the puzzle. A MeritPlaybook playbook combines your SAI with each school’s merit tiers, stacking policies, and aid-meeting percentages to estimate your realistic net cost at every school on your list. Get a personalized playbook, or see a real sample. For a walkthrough of how to fill out the FAFSA strategically, see our FAFSA strategy guide.