You can deduct up to $2,500 a year of student loan interest — and unlike most deductions, you get it without itemizing. It's an above-the-line adjustment that cuts your AGI directly, worth $300 to $800 in real tax savings across the 12%-32% brackets. The catch is income: for 2026 the deduction phases out between $85,000 and $100,000 of MAGI if you're single, or $175,000 and $205,000 married filing jointly. Here's the exact math, the traps, and how to check your 1098-E.
The formula is three steps. First, cap: your deduction starts as the interest you paid, capped at $2,500 — paid $4,000, count $2,500. Second, phase-out: inside your income window, multiply by the fraction you keep. Third, convert: the surviving deduction times your marginal rate is your savings.
| MAGI (single, 2026) | Phase-out kept | Deduction ($3,000 paid) | Savings at 22% |
|---|---|---|---|
| up to $85,000 | 100% | $2,500 | $550 |
| $90,000 | 67% | $1,667 | $367 |
| $92,500 | 50% | $1,250 | $275 |
| $95,000 | 33% | $833 | $183 |
| $97,500 | 17% | $417 | $92 |
| $100,000+ | 0% | $0 | $0 |
Read the mechanic carefully: the phase-out cuts the capped $2,500, not your actual interest. At $95,000 of MAGI with $3,000 paid, you deduct 33% of $2,500, not 33% of $3,000. And every $1,000 of extra MAGI costs a single filer about $167 of deduction until the window closes.
Enter your interest paid and bracket, then drag MAGI through the phase-out window — 2025 and 2026 thresholds both included.
Student Loan Interest Deduction Calculator →Almost every other popular deduction — mortgage interest, charitable gifts, that donated car — does nothing unless your itemized total beats the standard deduction ($16,100 single / $32,200 joint in 2026). The student loan interest deduction doesn't care. It lives above the line on Schedule 1, reduces AGI before you choose standard vs itemized, and a renter with no other deductions gets the full benefit.
The AGI reduction has second-order effects worth knowing: a lower AGI can matter for IRA contribution deductibility, Roth eligibility, and premium tax credits. It's a small deduction that occasionally unlocks larger doors.
| Filing status | 2025 window | 2026 window |
|---|---|---|
| Single / head of household | $85,000 – $100,000 | $85,000 – $100,000 |
| Married filing jointly | $170,000 – $200,000 | $175,000 – $205,000 |
Joint filers got the only movement — the window shifted up $5,000 for 2026. The $2,500 cap itself hasn't moved since 2019 and isn't indexed to inflation, which quietly shrinks its value every year for a benefit aimed at early-career incomes.
Modified adjusted gross income starts from AGI — line 11 of your Form 1040 — and adds back a handful of exotic items: the foreign earned income exclusion, certain foreign housing amounts, and a couple of rarely-hit exclusions. For the overwhelming majority of W-2 borrowers, MAGI and AGI are the same number on the same line.
What that means in practice: pre-tax 401(k) contributions, traditional IRA contributions, and HSA contributions all lower your AGI, and therefore your MAGI. A borrower who lands at $86,500 — $1,500 into the phase-out — can pull back under $85,000 by deferring $1,500 more into a 401(k), restoring the full $2,500 deduction. That trade is worth running the numbers on whenever a raise pushes you near the line.
Your servicer issues Form 1098-E if you paid $600 or more of interest in the year (pull it from the servicer's portal in January). You don't attach it — it just supports the number. The deduction itself goes on Schedule 1, line 21, and flows to your 1040. Paid less than $600? You can still deduct what you paid; the servicer just wasn't required to issue the form, so keep statements. If you paid more than $600 in deductible interest than the form shows (pre-2024 capitalized interest quirks, multiple servicers), you can substantiate the higher amount.
Yes — up to $2,500 per return, as an above-the-line adjustment you can take with the standard deduction. For 2026 it phases out between $85,000 and $100,000 of MAGI for single filers and $175,000 to $205,000 married filing jointly. The cap has been stuck at $2,500 since 2019 because it isn't inflation-indexed.
No. The student loan interest deduction is an adjustment to income on Schedule 1 — it reduces AGI directly, whether you itemize or take the standard deduction. That's what makes it one of the best deductions for renters and early-career borrowers with no mortgage interest to itemize.
Modified AGI: your adjusted gross income plus a few rare add-backs like the foreign earned income exclusion. For most W-2 borrowers, MAGI is simply the AGI on line 11 of Form 1040. Pre-tax 401(k) and HSA contributions lower it, which matters if a raise pushed you into the phase-out window.
Qualified education loans taken for you, your spouse, or a dependent at an eligible institution — federal and private both count. Not qualified: loans from relatives, from employer retirement-plan borrowings, or credit card interest even if it paid tuition. You also can't claim it if you're claimed as someone else's dependent or married filing separately.