A Stafford Loan is a student loan offered to eligible students enrolled in accredited American institutions of higher education to help finance their education. The terms of the loans are described in Title IV of the Higher Education Act of 1965 (with subsequent amendments), which guarantees repayment to the lender if a student defaults.

In 1988, Congress renamed the Federal Guaranteed Student Loan program the Robert T. Stafford Student Loan program, in honor of U.S. Senator Robert Stafford, a Republican from Vermont, for his work on higher education.

Because the loans are guaranteed by the full faith of the US Government, they are offered at a lower interest rate than the borrower would otherwise be able to get for a private loan. On the other hand, there are strict eligibility requirements and borrowing limits on Stafford loans.

No payments are expected on the loan while the student is enrolled as a full or half time student. This is referred to as in-school deferment. Deferment of repayment continues for six months after the student leaves school either by graduating, dropping below half-time enrollment, or withdrawing. This is referred to as the Grace Period.

Stafford loans are available both as subsidized and unsubsidized loans. Subsidized loans are offered to students based on demonstrated financial need. The interest on Subsidized loans is paid by the federal government while the student is in school, during the grace period, and during authorized deferment. For unsubsidized Stafford loans, students are responsible for all of the interest that accrues while the student is enrolled in school. The interest may be deferred throughout enrollment. Unpaid interest that is deferred until after graduation is capitalized, added to the loan principal.

As of July 1, 2006 all Stafford loans are issued with a fixed interest rate.

As the new rate goes into effect, some loan providers are foregoing portions of the margin they are entitled to under the Federal program, offering interest rates lower than the standard rate. Many are also offering price incentives related to payment history, direct debit, etc. Collectively, interest rate reductions, principal reductions, and origination fee discounts are known as Borrower Benefits.