The federal student loan landscape will change modestly for the 2026-27 academic year after recent Treasury market activity. Following the May Treasury auction that produced a high yield of 4.468%, federal loan rates were set using the standard formula that combines that auction result with statutory margins. These new percentages apply to loans disbursed on or after July 1, 2026 and will remain fixed for the life of each loan. Borrowers and parents should understand both the headline numbers and the mechanics behind them, because small percentage shifts can meaningfully affect long-term repayment costs under different plans.
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New rates and how they compare to last year
For the 2026-27 year the Department of Education published fixed interest rates derived from the May auction yield plus each program’s margin. The resulting rates are 6.52% for undergraduate Federal Direct Stafford Loans, 8.07% for graduate Stafford loans, and 9.07% for both Grad PLUS and Parent PLUS loans. Each of these figures represents an increase of roughly 0.13 percentage points versus the prior year: undergrad moved from 6.39% to 6.52%, graduate from 7.94% to 8.07%, and PLUS loans rose from 8.94% to 9.07%. It is worth noting that all four rates remain beneath their statutory caps—8.25% for undergrads, 9.50% for graduates, and 10.50% for PLUS loans—so the adjustments are within expected limits.
How the rate formula works
Base yield and statutory margins
The single most important technical input is the Treasury auction’s high yield: in this case 4.468% from the May 12 auction. That yield is combined with a fixed government margin for each loan category to generate the published fixed interest rate. The process is mechanical and transparent—when the Treasury yield rises, federal student loan rates move in the same direction. This is why each loan category increased by approximately the same amount year over year: the underlying 10-year Treasury yield rose modestly compared to the previous auction, producing a uniform bump across programs.
Caps and special eligibility rules
Two practical constraints shape choices: the statutory caps mentioned earlier prevent rates from exceeding predefined maximums, and program-specific eligibility rules limit who can access certain loans. For example, Grad PLUS loans are currently only being issued to students who were already grandfathered into that option; new graduate borrowers may have different paths. Understanding the distinction between a program’s published rate and whether a borrower can actually take that loan is critical when planning financing for college or graduate school.
What borrowers should expect and examples
Although the percentage increase is modest, the cumulative effect over time can be meaningful. As an illustration, an undergraduate who borrows the maximum unsubsidized limit of $5,500 for a single year at 6.52% and repays under a 10-year standard repayment plan would pay roughly $1,991 in interest across that loan’s life. Parent PLUS borrowers face both a higher interest rate—9.07%—and a standard origination fee of 4.228% on disbursements, making Parent PLUS one of the more expensive federal borrowing options. Those planning multi-year borrowing should model cumulative costs across all loans, because interest adds up and can compound on extended or income-driven schedules.
Context, perspective, and the author
These rate adjustments fall in line with historical averages and reflect normal market linkages between Treasury yields and federal loan pricing. The numbers are important for budgeting and for comparing alternatives such as refinancing private loans after graduation, but policy or market shifts could change the backdrop in future years. Robert Farrington, founder of The College Investor, has researched and written about student loans and college finance for more than 15 years. He holds an MBA from UC San Diego Rady School of Management, has navigated his own repayment journey, and has been featured in major outlets like The New York Times, The Wall Street Journal, The Washington Post, and Forbes. His work focuses on making the intersection of personal finance and education clearer and more accessible to borrowers.