A family loan to pay off student loans can beat a federal or private interest rate by several points, and that math is real. But it trades away two things most families never price in: the $2,500 student loan interest deduction and, for anyone still working toward Public Service Loan Forgiveness, the federal protections that come with the original loan. Before a parent wires $38,000 to close out a servicer account, both sides need to see the full trade, not just the rate.
This is a different decision than borrowing from family to pay for school in the first place, a question covered in our guide to family loans for college. The loan already exists, it is already disbursed, and it already carries federal borrower protections. Swapping it for a private family loan is a refinancing decision, and refinancing decisions have their own rules. It also runs parallel to another debt payoff question we've covered before: using a family loan to pay off credit card debt, where the same rate-versus-protections tradeoff applies.
Can a Family Loan Really Beat Federal Student Loan Rates?
Start with what is actually on the table. For loans first disbursed between July 1, 2026 and June 30, 2027, the federal rate is 6.52% for undergraduate Direct Subsidized and Unsubsidized loans, 8.07% for graduate Direct Unsubsidized loans, and 9.07% for PLUS loans, according to the Department of Education's published rates for the 2026-27 award year. Private refinance lenders have been advertising fixed rates from roughly 4% to over 10% APR depending on credit, with the best-qualified borrowers getting offers near 4%.
A family loan can beat both, because the only legal floor is the IRS Applicable Federal Rate (AFR), and that floor moves every month. Our broader guide on what interest rate to charge on a family loan walks through how that floor works for any family loan, not just a student loan refinance. Family Loan Tracker's AFR calculator pulls the live short-term, mid-term, and long-term rate so you are not working from a number that is already a month stale.
Here is what that gap looks like on a real balance: a graduate borrower carrying $38,000 in PLUS debt on a 10-year term.
| Lender | Rate | Monthly payment | Total interest (10 yrs) |
|---|---|---|---|
| Federal PLUS loan | 9.07% | $482.81 | $19,937 |
| Private refinance (mid-range) | 7.00% | $441.21 | $14,945 |
| Family loan | 5.00% | $403.05 | $10,366 |
The family loan rate above is illustrative, set comfortably over most months' AFR floor rather than pulled from it directly. Even so, the family option saves about $80 a month and roughly $9,570 in total interest against the PLUS loan, which is the number that makes this idea attractive in the first place.
Is Family Loan Interest on Student Loans Tax Deductible?
Here is the part the rate comparison skips. The federal student loan interest deduction lets a borrower deduct up to $2,500 of interest paid each year, phasing out for single filers with modified adjusted gross income between $85,000 and $100,000 and for joint filers between $175,000 and $205,000 for 2026. That deduction only applies to a "qualified education loan" as defined in Internal Revenue Code Section 221.
Section 221 explicitly excludes any loan from a person related to the borrower under Section 267(b) or 707(b)(1), which covers parents, grandparents, siblings, and most other family lenders. Refinance a federal or private student loan into a loan from mom and dad, and the interest the borrower pays is no longer eligible for that deduction, full stop. A borrower in the 22% bracket who was claiming the full $2,500 deduction is giving up roughly $550 a year in tax savings to get the lower family rate. That number belongs in the comparison, and almost nothing written on this topic puts it there.
What Do You Give Up Besides the Deduction?
If the debt being refinanced is federal, not private, the stakes go beyond one deduction. Federal student loans carry a set of protections that a family promissory note cannot replicate:
- Income-driven repayment. Federal loans can be repaid as a percentage of income, with payments as low as $10 a month in hardship years. A family loan has whatever fixed schedule the note specifies.
- Public Service Loan Forgiveness. PSLF remains a statutory program under Section 455(m) of the Higher Education Act, and only Congress can end it. But it only forgives federal Direct Loans still held by the government. Pay one off with a family loan and those payments stop counting toward the 120 required for forgiveness.
- Death and disability discharge. Federal loans are discharged if the borrower dies or becomes totally and permanently disabled. A family loan does not disappear on its own; it becomes an estate matter or a hardship renegotiation between relatives.
- Deferment and forbearance. Federal servicers have standardized hardship programs. A family lender has to decide, case by case, whether to pause payments, and that decision now sits inside the relationship instead of inside a loan servicer's policy manual.
The federal repayment landscape is also mid-change. The SAVE plan is being phased out and several income-driven plans, including PAYE and most uses of Income-Contingent Repayment, are closing to new enrollment, with the new Repayment Assistance Plan becoming the main income-driven option going forward. PSLF itself is untouched by these changes. If a borrower is five years into a PSLF-qualifying job and seven years from forgiveness, refinancing that federal balance into a family loan to save on interest can cost far more than it saves.
When Does a Family Student Loan Payoff Still Make Sense?
The math favors a family loan when the debt has none of those federal strings attached:
- The loan is already private. A private student loan carries no PSLF eligibility, no income-driven repayment, and no federal discharge protection to give up. Here, the comparison really is just rate versus rate, and a well-structured family loan usually wins.
- The borrower has stable, rising income and no path to forgiveness. If PSLF or income-driven forgiveness was never realistic for this borrower's career, the federal protections have no value to trade away, only the deduction does, and that is a smaller number to weigh against years of interest savings.
- The family can tolerate missed or late payments without a credit consequence. One underrated point in favor of keeping a federal loan is that federal servicers report to credit bureaus the same way any lender does; a family loan reported nowhere means a missed payment has no credit cost but also builds no credit history.
How Do You Structure a Family Student Loan Payoff Correctly?
A family student loan refinance should look like any other serious family loan, not a casual transfer:
- Write a promissory note. Use a proper family loan agreement that fixes the principal, rate, term, and payment schedule in writing. Courts and the IRS both look for this when a loan's legitimacy is ever questioned.
- Set the rate at or above the AFR, using the matching term (short-term for notes under 3 years, mid-term for 3 to 9 years, long-term beyond that). Going below it risks the IRS treating the forgone interest as a taxable gift under the imputed interest rules.
- Build the real amortization schedule before you commit. Run the numbers on Family Loan Tracker's amortization schedule calculator so both sides see the payment-by-payment split of principal and interest, not just the headline savings.
- Track every payment in writing. Once the loan is live, track it like a lender would, with a payment ledger either side can check. A family loan with no paper trail is the fastest way to turn a generous gesture into a holiday-dinner argument.
The Real Decision
If this is your first time weighing a family loan against any other option, step back and work through our complete decision framework for lending money to family before you commit to a number. For the student loan case specifically: a family loan to pay off student debt is a refinancing decision wearing a family-finance costume. Treat it like one: compare the actual rate, subtract the deduction you will lose, and weigh the federal protections only if the debt is still federal. For a private loan with no forgiveness path, the family rate usually wins outright. For a federal loan with real PSLF or income-driven repayment value still on the table, the "savings" can be the most expensive $9,570 a family ever earns.
This is not tax or legal advice. The rules around Section 221, AFR compliance, and federal loan discharge are specific and change with new legislation; confirm your numbers with a CPA or student loan counselor before you sign anything.
