Student loan interest deduction: who can claim it and how it is calculated

The student loan interest deduction can reduce the income reported on a federal tax return by eligible interest you paid on a qualifying loan. For the 2025 tax year, the maximum is the smaller of $2,500 or the interest actually paid, and income can reduce or eliminate the benefit.

This is a deduction, not a tax credit. A deduction lowers income before tax is calculated, so it does not cut a tax bill dollar for dollar. It is also an adjustment to income, which means you can claim it without itemizing deductions.

Start with the payment

Only the interest part of a loan payment can qualify. Principal, the amount originally borrowed and repaid, does not. The IRS includes both required interest payments and interest voluntarily prepaid during the year.

A loan need not be federal. Private student loans can qualify too, provided they meet the federal definition of a qualified student loan. The key question is what the money was borrowed for, rather than who made the loan.

The eligibility checklist

Work through these tests before calculating an amount:

• You paid interest during the tax year. The payment must be interest on a qualified student loan.
• You were legally obligated to pay it. Paying someone else’s loan does not by itself establish eligibility.
• The loan had the required education purpose. It must have been borrowed solely for qualified higher-education expenses for you, your spouse, or someone who was your dependent when you took out the loan. The education must have been for an eligible student during an academic period, and the expenses must have been paid or incurred within a reasonable time before or after borrowing.
• Your filing and dependency status allow it. Married taxpayers filing separately cannot claim the deduction. Nor can a taxpayer, or a spouse on a joint return, be claimed as a dependent on another person’s return.
• Your modified adjusted gross income, or MAGI, is below the applicable limit. MAGI is an income measure used for this tax rule. The limits are set by tax year and filing status.

How the income phaseout changes the deduction

For 2025, a single, head-of-household, or qualifying-surviving-spouse filer receives the full otherwise allowable deduction at MAGI of $85,000 or less. The deduction phases out above $85,000 and disappears at $100,000. For married taxpayers filing jointly, the corresponding figures are $170,000 and $200,000.

First find the pre-phaseout deduction: use the smaller of $2,500 and the qualified interest paid. If MAGI falls in the phaseout band, reduce that figure using the applicable fraction.

• Single, head of household, or qualifying surviving spouse: reduction equals pre-phaseout deduction multiplied by (MAGI minus $85,000) divided by $15,000.
• Married filing jointly: reduction equals pre-phaseout deduction multiplied by (MAGI minus $170,000) divided by $30,000.

Worked 2025 example

Hypothetical inputs: A single filer has MAGI of $91,000 and paid $1,100 of interest on a qualified loan. Because $1,100 is below the $2,500 cap, the pre-phaseout deduction is $1,100.

1. Calculate the phaseout fraction: ($91,000 − $85,000) ÷ $15,000 = 0.40.
2. Calculate the reduction: $1,100 × 0.40 = $440.
3. Subtract the reduction: $1,100 − $440 = $660.

The result is a $660 deduction from income, not a $660 refund or tax credit. For a different filing year, use that year’s IRS thresholds and worksheet rather than carrying these figures forward.

Records and filing steps

1. Check your Form 1098-E. A lender or servicer should send Form 1098-E, Student Loan Interest Statement, if you paid $600 or more of qualifying interest. Keep it with your tax records.
2. Do not stop if no form arrives. Paying less than $600 does not automatically make the interest ineligible. If you otherwise qualify, ask the servicer for the amount of interest paid.
3. Separate any ineligible employer-paid amount. Interest paid through an employer student-loan benefit that was excluded from your income cannot also be claimed as your deduction.
4. Report the calculated amount. For the 2025 Form 1040, the amount is reported on line 21.

Taxpayers who file Form 2555 or Form 4563, or exclude Puerto Rico-source income, should use Worksheet 4-1 in IRS Publication 970 instead of the standard Form 1040 worksheet.

Keep this separate from education credits

The student loan interest deduction applies after borrowing, based on interest paid. It is separate from education tax credits, including the American Opportunity Credit and Lifetime Learning Credit, which Federal Student Aid identifies as benefits tied to qualifying higher-education expenses. A taxpayer’s eligibility for any education-related tax benefit depends on that benefit’s own rules.

Frequently asked questions

What counts as a qualified student loan for the interest deduction?

It is a loan taken out solely for qualified higher-education expenses for you, your spouse, or a person who was your dependent when the loan was made. The education must be for an eligible student during an academic period, and expenses must be paid or incurred within a reasonable time around the borrowing.

Can I deduct interest on a private student loan?

Potentially. The benefit is not limited to federal loans; a private loan may qualify if it was used for the required higher-education expenses and the taxpayer meets the other eligibility rules.

Can I claim the deduction without a 1098-E?

Possibly. Servicers generally send Form 1098-E when at least $600 of qualifying interest was paid, but interest below that amount may still be deductible. Obtain the interest total from the loan servicer and apply the eligibility rules.

Is the student loan interest deduction a tax credit?

No. It is an adjustment to income, so it reduces income used to calculate tax rather than reducing tax owed dollar for dollar. You do not need to itemize deductions to claim it if you qualify.

Sources

• Topic no. 456, Student loan interest deduction | Internal Revenue Service — www.irs.gov
• Tax Benefits for Higher Education - Federal Student Aid — studentaid.gov
• Can you deduct student loan interest? - Fidelity Investments — www.fidelity.com