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 income contribution
Available income = AGI minus the income protection allowance (based on household size) minus federal income tax paid. That available income is then run through a bracketed assessment:
- First $19,400 at 22%
- Next $5,100 at 25%
- Next $5,100 at 29%
- Next $5,100 at 34%
- Next $5,100 at 40%
- Remainder at 47%
Income protection allowances
- Family of 2: $22,520
- Family of 3: $29,040
- Family of 4: $36,000
- Family of 5: $42,350
- Family of 6+: $48,420
Parent asset contribution
Non-retirement assets above the $10,500 asset protection allowance are assessed at 5.64%.
Number in college adjustment
The total parent contribution (income + assets) is divided by the number of family members enrolled in college. This is a significant lever: two students in college at once cuts the parent share in half.
Student contribution
Student income above the $7,040 protection allowance is assessed at 50%. 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
- State and local tax allowances that reduce available income
- Employment expense allowances for two-working-parent households
- Age-based asset protection adjustments for older parents
- Simplified needs test that zeroes out assets for low-income families
- Automatic zero SAI for families under the income threshold
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 number of students in college no longer reduces the parent contribution as dramatically under some proposals, though the current formula still divides by the number enrolled. 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 adjustments including state and local tax allowances, employment expense allowances, age-based asset protections, and special circumstances like the simplified needs test and automatic zero SAI. 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?
The parent contribution portion of the SAI is divided by the number of family members enrolled in college simultaneously. If the formula calculates a $20,000 parent contribution and two siblings are in college at the same time, each student's SAI gets $10,000 of parent contribution instead of $20,000. This is one of the most significant levers in the formula and explains why families with overlapping college years often see dramatically better aid packages.
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.