Up to $2,500 in student loan interest is deductible for eligible borrowers in 2026. Most families with a Parent PLUS loan assume this deduction is available to them in some form. In the most common arrangement (student makes the payments, parent's name is on the loan), the deduction is available to nobody. The IRS loses it entirely.
The IRS rule that produces this outcome is two sentences long:
To claim the student loan interest deduction under IRC Section 221, you must have been legally obligated to repay the loan, and you must have actually paid the interest.
For a Parent PLUS loan paid by the student: the student is not legally obligated (fails requirement 1), and the parent did not pay (fails requirement 2 for the parent). No deduction.
Key Takeaway: The student loan interest deduction on a Parent PLUS loan belongs to the parent, and only when the parent actually makes the payments. If a student makes the payments on a parent's loan, the deduction is lost unless the family restructures how the money flows.
Why the Legal Obligation Rule Matters
A Parent PLUS loan is legally the parent's debt. The master promissory note is signed by the parent. The loan servicer reports to the parent's credit. The parent is the only party the Department of Education can collect from. The student has zero legal obligation on this loan.
The IRS student loan interest deduction exists specifically for borrowers who are obligated to repay their own debt. A student paying off someone else's debt, even voluntarily and consistently, is not deducting a debt they owe. They are paying another person's bill.
This is the same logic that prevents a friend from deducting the mortgage interest they paid on your house. Actual payment is not enough. Legal obligation is required.
The Standard Arrangement and Why It Produces Zero Deduction
Many families handle Parent PLUS repayment like this: the student graduates, gets a job, and starts transferring money to the parent every month to cover the loan payment. The parent's account is the one making the servicer payment. But the cash is coming from the student.
If the parent uses the student's money to make the payment, the parent did pay the interest in a technical sense. But most tax advisors and the IRS itself would look at the substance of the arrangement. If the parent is simply passing through the student's funds without any independent economic decision to make the payment, the deduction is on shaky ground.
The cleaner and more defensible approach is the restructured payment arrangement described below.
The Workaround: Restructuring the Payment Flow
The solution preserves the deduction through a simple change in how money moves:
Step 1: The student deposits money into their own account (as always).
Step 2: The student gifts or transfers a sum to the parent. This is a routine transfer. For 2026, gifts up to $19,000 per recipient per year are excluded from gift tax reporting.
Step 3: The parent uses their own funds (now including the student's transfer) to make the loan payment directly to the servicer.
Step 4: The parent receives the 1098-E in their name and claims the deduction on their return.
In this structure, the parent is legally obligated (they signed the promissory note) and the parent is actually paying (they are initiating the payment from their account). Both IRS requirements are met. The parent claims the deduction.
Whether the deduction produces a meaningful tax benefit depends on the parent's income and marginal tax rate. At the $95,000 phase-out ceiling for single filers, the deduction is fully eliminated regardless of payment structure.
When the Deduction Is Worth Pursuing and When It Is Not
| Parent Tax Situation | Deduction Strategy |
|---|---|
| Parent's AGI below $80,000 (single) or $165,000 (MFJ) | Full $2,500 deduction available, worth restructuring payments |
| Parent's AGI in phase-out range | Partial deduction, worth calculating whether restructuring helps |
| Parent's AGI above $95,000 (single) or $195,000 (MFJ) | Deduction fully phased out, restructuring provides no benefit |
| Parent is claimed as a dependent | Cannot claim the deduction while being a dependent |
Also consider: if the parent is in a 22% marginal bracket, the maximum $2,500 deduction saves $550 in federal taxes. That is real money, but the benefit scales with the tax bracket and the actual interest paid.
The Refinancing Option: What It Solves and What It Costs
If the student wants to formally take legal obligation for the debt, they can refinance the Parent PLUS loan through a private lender into a new loan in the student's own name. The student becomes the borrower of record. They can then deduct the interest they pay on their own return.
The permanent cost of this approach: all federal loan benefits are gone. Parent PLUS loans are federal debt. The student's refinanced private loan has no income-driven repayment options, no Public Service Loan Forgiveness eligibility, and no federal forbearance rights. For many borrowers, these protections are worth more than the annual tax deduction.
If you are considering refinancing, run the full numbers. The PSLF benefit alone can be worth tens of thousands of dollars for borrowers heading into public service careers. Trading that away for a $550/year tax deduction is not the math most families want to make.
For more on how student loan repayment interacts with financial aid eligibility on the FAFSA side, the Parent PLUS loan denial guide covers the separate question of what happens when the PLUS loan application is denied.
A Note on This Content
This article provides general educational information about the federal student loan interest deduction and how it interacts with Parent PLUS loans for the 2026 tax year. It is not individualized tax advice. Your specific deduction eligibility depends on your income, filing status, loan balance, and interest paid. The payment restructuring approach described above should be reviewed with a CPA, enrolled agent, or qualified tax professional who can confirm it is implemented correctly for your situation. For IRS guidance, see Publication 970 and the instructions for Schedule 1, Line 21.
