Federal student loan interest rates for the 2026–27 academic year will be locked in this May, tied to the 10-year Treasury note auction — and with Treasury yields still elevated, borrowers should expect rates that remain well above pre-pandemic norms. Knowing how the formula works, and what your alternatives are, could save your family thousands of dollars over a repayment term.

Here is something most families learn too late: the interest rate on a federal student loan is not negotiable, not flexible, and not finalized until May — but most students commit to attending a college well before that number is public. You sign the award letter in April. You find out what you actually borrowed at in June. That sequence is not an accident; it is just how the system works. Understanding it is the first step toward protecting yourself.

How the Rate Is Actually Set

Federal student loan interest rates are recalculated every year under a formula established by the Bipartisan Student Loan Certainty Act of 2013. The rate is tied to the high yield of the 10-year Treasury note at the final auction in May, plus a fixed add-on that varies by loan type.1

For 2025–26, the Department of Education set undergraduate Direct Subsidized and Unsubsidized loan rates at 6.53%, graduate Unsubsidized rates at 8.08%, and PLUS loans — used by parents and graduate students — at 9.08%.2 These are fixed for the life of loans disbursed during that award year.

With 10-year Treasury yields currently trading in the 4.4–4.6% range as of late March 2026, the undergraduate add-on of 2.05 percentage points means the 2026–27 rate will likely land somewhere between 6.4% and 6.7% for undergraduates, assuming yields hold. That is not dramatically different from last year — but it is still roughly double what borrowers paid in 2020–21, when the rate sat at 2.75%.1

For parents taking PLUS loans, the math is genuinely alarming. A $30,000 PLUS loan at 9.08% over 10 years costs approximately $14,000 in interest alone. That is a number worth writing down before you sign.

What Families Should Do Right Now

First, borrow as little as possible before you know the rate. This sounds obvious, but the pressure to commit to a school by May 1 — the traditional deposit deadline — means families often make borrowing decisions before the 2026–27 rate is published. If you are deciding between two schools right now and one requires significantly more in loans, build your comparison using last year's rate as a conservative estimate. Do not assume rates will drop.

Second, max out subsidized loans before touching unsubsidized ones. Subsidized Direct Loans do not accrue interest while a student is enrolled at least half-time.2 That distinction is worth hundreds of dollars per year on a $5,500 loan. Check your award letter carefully — some schools bury the split between subsidized and unsubsidized amounts in small print.

Third, treat Parent PLUS loans as a last resort, not a funding gap filler. Congress has made some noise about PLUS loan reform in recent months, but no legislative changes are in effect for the 2026–27 cycle. The rate is high, the origination fee is 4.228%, and repayment options are more limited than for student borrowers.2 If a school's financial aid package relies heavily on PLUS loans to close the gap, that is not aid — that is debt transfer.

One Piece of Context Worth Having

The FAFSA simplification changes that rolled out in 2024–25 continue to ripple through financial aid offices. Some families who received larger grant packages under the new formula in 2025–26 are reporting smaller offers in 2026–27 as colleges recalibrate their institutional aid models. More grant money sounds better until you realize the gap is being filled with loans at 6.5%.

Your Next Step

Before you pay any enrollment deposit, request an itemized breakdown of your award letter that separates grants, scholarships, work-study, subsidized loans, unsubsidized loans, and PLUS loans into distinct line items. Then calculate the total loan amount across all four years — not just year one. The Federal Student Aid Loan Simulator at studentaid.gov will show you exactly what monthly repayment looks like.2 Run those numbers before you commit.

Footnotes

  1. Congressional Research Service. "Federal Student Loan Interest Rates." Updated 2025. https://sgp.fas.org/crs/misc/R43076.pdf ↩ ↩2

  2. U.S. Department of Education, Federal Student Aid. "Interest Rates and Fees for Federal Student Loans." https://studentaid.gov/understand-aid/types/loans/interest-rates ↩ ↩2 ↩3 ↩4