Student Loan Interest Deduction 2026: Limits & MAGI Phase-Out

The student loan interest deduction is one of the few federal tax breaks available to every filer, regardless of whether they itemize — it's an "above-the-line" deduction that reduces your Adjusted Gross Income (AGI) directly. For 2026, the maximum deduction remains $2,500, but the income level at which it starts phasing out has increased again for inflation, per IRS Revenue Procedure 2025-32.

This guide covers the exact 2026 deduction cap, the Modified Adjusted Gross Income (MAGI) phase-out thresholds for single and joint filers, who's eligible to claim it, and two worked dollar examples showing how the phase-out reduces the deduction as income rises.

How Much Can You Deduct in 2026?

The maximum student loan interest deduction for 2026 is $2,500 — this figure is fixed by statute under IRC §221(b)(1) and, unlike many other tax provisions, is not adjusted for inflation. It has remained at $2,500 since 2001. What does change every year is the income level at which the deduction starts shrinking and eventually disappears — that threshold is adjusted annually for inflation.

Because this is an above-the-line deduction, it reduces your Adjusted Gross Income directly on Schedule 1 of Form 1040 — you do not need to itemize deductions to claim it, unlike deductions such as mortgage interest or charitable contributions.

What Are the 2026 MAGI Phase-Out Thresholds?

Per IRS Revenue Procedure 2025-32, the $2,500 deduction begins to phase out once your Modified Adjusted Gross Income (MAGI) exceeds a set threshold, and disappears completely above a higher ceiling:

Within the phase-out band, your allowable deduction shrinks proportionally: it's calculated as $2,500 minus ($2,500 × (your MAGI − the lower threshold) ÷ (the upper threshold − the lower threshold)).

Worked Example 1: Single Filer, Mid-Phase-Out

A single filer paid $2,800 in student loan interest in 2026 and has a MAGI of $92,500 — squarely inside the $85,000–$100,000 phase-out band. The reduction ratio is ($92,500 − $85,000) ÷ ($100,000 − $85,000) = $7,500 ÷ $15,000 = 50%. Starting from the lesser of actual interest paid ($2,800) or the $2,500 cap, the allowable deduction is reduced by 50%: $1,250 deductible for 2026.

Worked Example 2: Married Filing Jointly, Full Deduction

A married couple filing jointly paid $2,200 in combined student loan interest in 2026 and has a household MAGI of $150,000 — below the $175,000 phase-out threshold. Because their MAGI is under the threshold, they can deduct the full $2,200 they actually paid (capped at $2,500, but their actual interest paid was lower than the cap).

Who Qualifies for the Deduction?

To claim the student loan interest deduction for 2026, you must meet all of the following conditions:

• Legally obligated to pay: You must be legally obligated to pay interest on a qualified student loan — this can be your own loan or a Parent PLUS loan you took out for a dependent, but not a loan a parent co-signed where the student is the sole obligor (unless the parent is also legally liable).
• Qualified education loan: The loan must have been used solely to pay for qualified higher education expenses (tuition, fees, room and board, books, and related expenses) for you, your spouse, or a dependent at the time the debt was incurred, at an eligible institution.
• Not claimed as a dependent: You cannot claim this deduction if another taxpayer claims you as a dependent on their return.
• Not married filing separately: IRC §221(e)(2) explicitly disallows the deduction for anyone using the married filing separately status, regardless of income.
• MAGI under the ceiling: Your Modified Adjusted Gross Income must be below the fully-phased-out threshold for your filing status ($100,000 single / $205,000 joint for 2026).

Why Is This an Above-the-Line Deduction?

Most deductions fall into one of two categories: the standard deduction (a flat amount every filer can take) or itemized deductions (which require giving up the standard deduction and listing specific expenses on Schedule A). The student loan interest deduction is neither — it's an "adjustment to income" claimed on Schedule 1 of Form 1040, which means it reduces your AGI before the standard deduction is applied.

This matters because you get the full benefit of both: you can claim the $2,500 student loan interest deduction and still take the full standard deduction on top of it. This is a meaningfully better structure than an itemized deduction, which only helps taxpayers whose total itemized expenses exceed the standard deduction amount.

What Counts as Qualified Student Loan Interest?

Interest paid on federal student loans (Direct Loans, FFEL Program loans, Perkins Loans) and most private student loans used exclusively for qualified higher education expenses generally counts. Interest does not need to be paid directly by you in every case — interest paid by a parent on a loan for which the student is legally obligated is treated as if the student paid it (and the student can claim the deduction, subject to the dependent rule above), but only if the student isn't claimed as a dependent that year.

Loans from a related party (such as a family member) or from a qualified employer plan generally do not qualify. Your loan servicer will send you Form 1098-E if you paid $600 or more in interest during the year, though you can still claim the deduction for smaller amounts even without receiving the form.