AOTC vs LLC Calculator: Best Education Credit Mix

You don't have to pick one education credit for the whole family. Each student gets either the American Opportunity Tax Credit (AOTC) or the Lifetime Learning Credit (LLC), and one return can use both: the AOTC for an eligible undergraduate (up to $2,500, 40% refundable) and the LLC for everyone else (20% of up to $10,000 of combined expenses, $2,000 per return). The calculator tests every combination and shows the one that saves the most.

This calculator is for informational purposes only. It estimates the credits from the numbers you enter; the amounts on your return come from Form 8863.

The two credits side by side

These rules come from the Form 8863 instructions, Table 1, which also states the key point for families with more than one student: you can claim both credits on the same return, but not for the same student.

What to enter

• Number of students (up to five). Changing it adds or removes student cards without erasing what you typed.
• Education level. Pick "Undergraduate (5th+ year)" only if the student finished four years of postsecondary study before the year began; a student in a fifth calendar year who studied part-time earlier may still be in the first four years.
• Enrollment status. Half-time is set by the school but cannot be lower than the Department of Education standard; most semester schools treat 6 credits as half-time.
• Qualified expenses and books and materials. Use amounts you actually paid in the year, less tax-free scholarships, from your records rather than Form 1098-T box 1 alone.
• Years already claimed AOTC, counting years anyone else (for example a parent) claimed it for the student.
• MAGI and tax before credits for the whole return.

How the calculator chooses

1. AOTC eligibility per student. A student is AOTC-eligible only if they are an undergraduate in the first four years, enrolled at least half-time, and the AOTC has been claimed for fewer than four tax years. Graduate students, "5th year or later" undergraduates who have finished four years of study, and students enrolled less than half-time go to the LLC pool.
2. AOTC expenses are tuition and fees plus required books and materials, capped at $4,000 per student. LLC expenses are tuition and fees only.
3. Phase-out. Both credits are multiplied by the same fraction: ($90,000 − MAGI) ÷ $10,000, or ($180,000 − MAGI) ÷ $20,000 joint, between 0 and 1.
4. Refundable AOTC. 40% of the AOTC after the phase-out, unless you tick the under-24 box (see below).
5. Tax limit. The other 60% of the AOTC and the LLC together can only reduce your tax to zero (the Credit Limit Worksheet in the Form 8863 instructions).
6. Best mix. The calculator tries every assignment of AOTC-eligible students to the AOTC or the LLC and keeps the largest total of refundable credit plus nonrefundable credit used.

In practice the AOTC wins for every eligible student — the IRS instructions say so outright, because the AOTC on a set of expenses is always at least the LLC on the same expenses. The value of the per-student view is that ineligible students still earn an LLC instead of being ignored.

The side-by-side boxes show "AOTC only" (eligible students on the AOTC, nothing else) and "LLC only" (every student on the LLC) so you can see what the mix adds.

The under-24 rule

If the person filing — usually a student filing their own return — was under 24 at year-end and was under 18, or 18 with earned income below half their support, or a full-time student aged 19–23 with earned income below half their support, and a parent was alive, and they are not filing jointly, none of the AOTC is refundable (Form 8863, line 7). Tick the box and the whole AOTC becomes nonrefundable.

Worked examples

Undergraduate and graduate student in the same family

Married couple, MAGI $120,000, tax before credits $10,000. A sophomore with $12,000 of tuition and $900 of books, and a master's student with $25,000 of tuition.

• Sophomore on the AOTC: $2,500 ($1,000 refundable, $1,500 nonrefundable)
• Graduate student on the LLC: 20% × $10,000 = $2,000
• Nonrefundable total $3,500, under the $10,000 of tax
• Total benefit: $4,500

"AOTC only" would give $2,500 and "LLC only" (pooling both students' tuition, capped at $10,000) $2,000, so the mix is worth $2,000 more than the better single-credit option.

Same family, smaller tax bill

Change the tax before credits to $2,000.

• Refundable AOTC: $1,000 (paid regardless of tax)
• Nonrefundable: $1,500 AOTC + $2,000 LLC = $3,500, limited to $2,000 of tax
• Total benefit: $1,000 + $2,000 = $3,000; $1,500 of nonrefundable credit is lost

Two undergraduates and a low tax bill

Single parent filing head of household, MAGI $42,150. Two full-time first-year students, aged 18, with $5,000 of tuition and fees each. Tax on $18,000 of 2026 taxable income is about $1,806; the $500 credit for other dependents for each student brings it to about $800 before education credits.

• AOTC: $2,500 × 2 = $5,000; refundable 40% = $2,000; nonrefundable $3,000, of which $800 is used
• AOTC benefit: $2,800
• LLC alternative: 20% × $10,000 = $2,000, but nonrefundable and capped at the $800 of tax — $800

In the phase-out

Single filer, MAGI $85,000, one eligible student with $10,000 of tuition. Half the range is used, so the AOTC is $2,500 × 50% = $1,250 (with $500 refundable) and the LLC would be $2,000 × 50% = $1,000. Reducing MAGI to $80,000 with a $5,000 traditional IRA or 401(k) contribution restores the full credit; the MAGI calculator shows which adjustments count.

Rules both credits share

• Married filing separately: no education credit. Married couples must file jointly (IRC §25A(g)(6)).
• Dependents. Only the person who claims the student as a dependent can take a credit for that student, and expenses the student or a relative paid are treated as paid by that person. If no one claims the student, only the student can.
• Payment year. Expenses count in the year paid, for academic periods starting that year or in the first three months of the next year.
• Tax-free help reduces expenses. Subtract the tax-free part of scholarships and grants, tax-free employer education assistance (up to $5,250 a year), and veterans' benefits.
• No double benefit with a 529. Expenses used for a credit must be removed from the qualified expenses that make a 529 or Coverdell withdrawal tax-free. Paying the credit-sized portion of tuition from other money and using the 529 for housing is the usual fix; the 529 vs. UTMA calculator covers the 529 side.
• Form 1098-T is generally required, with exceptions when the school was not required to issue one or did not furnish it after you asked.
• Identification from 2026. For tax years beginning after 2025, the person claiming and each student need a Social Security number; ITINs no longer qualify. The AOTC also requires the school's EIN on Form 8863.
• No carryforward. Nonrefundable education credits your tax can't absorb are lost.

Mistakes the comparison helps you avoid

1. Putting every student on the LLC because one child is in graduate school. That throws away up to $2,500 per AOTC-eligible student.
2. Claiming the AOTC for a fifth year. Once the student has completed four years of postsecondary study, or the AOTC has been claimed four times, the LLC is the only option.
3. Counting off-campus textbooks for the LLC. They count for the AOTC, not the LLC, unless the school requires you to buy them from it.
4. Ignoring the tax limit. A large LLC on a small tax bill is mostly wasted; the refundable AOTC is not.
5. Overlooking the student's own return. If a student is not your dependent, the student claims the credit — but the under-24 rule may block the refundable part.

Reading your results

• Recommended shows AOTC, LLC, or "AOTC + LLC" when a mix is best, with the total benefit.
• Per-student analysis shows each student's eligibility and which credit the plan uses for them.
• Tax impact summary shows nonrefundable credit applied, tax after credits, and the refundable AOTC added to your refund.
• Warnings flag MFS, income above the limit, and nonrefundable credit lost to a low tax bill.

Related calculators

For a single undergraduate, the AOTC calculator tracks the four-year limit per student. For graduate school or job-skills courses only, the Lifetime Learning Credit calculator is simpler. The Lifetime Learning Credit income limits guide explains why the $80,000/$160,000 thresholds have not moved since 2021, and the education savings hub gathers the rest of the site's college-cost tools.