Student loans are not interest-free, with one narrow exception: federal Direct Subsidized Loans, which the U.S. Department of Education pays the interest on while you’re in school at least half-time, during your six-month grace period, and during approved deferments. Every other student loan, federal or private, starts accruing interest the day the money is disbursed. Whether student loans are interest free, then, depends entirely on which loan you have and when.
The One Loan With Interest-Free Periods
Direct Subsidized Loans are the only federal student loans with built-in interest-free windows. To qualify, you must be an undergraduate who demonstrates financial need on the FAFSA. Graduate and professional students lost eligibility for subsidized loans starting with the 2012–2013 academic year under the Budget Control Act of 2011.1Federal Student Aid Partners. Elimination of Front Interest Rebate and End of Subsidized Loan Eligibility for Graduate or Professional Students
The Department of Education covers the interest on your subsidized loans during three specific periods:2eCFR. 34 CFR Part 685 William D. Ford Federal Direct Loan Program
- While you’re enrolled at least half-time at an eligible school.
- During the six-month grace period after you leave school or drop below half-time.
- During qualifying deferments, such as returning to school or economic hardship.
Outside those windows, your subsidized loan accrues interest like any other loan.
Loans That Always Accrue Interest
Direct Unsubsidized Loans and private student loans start accruing interest at disbursement, with no interest-free period at any point.3Federal Student Aid. Top 4 Questions: Direct Subsidized Loans vs. Direct Unsubsidized Loans You typically aren’t required to make payments while in school, but interest still builds up during enrollment, the grace period, and any deferment or forbearance. You owe every dollar of it.
The buildup adds up fast. A $10,000 unsubsidized loan at 6.39% accrues roughly $639 in interest per year, which is about $2,556 over a four-year degree before you make a single payment. If you’re offered both types, use the subsidized portion first.
Some private lenders let you make interest-only payments while in school so your balance doesn’t grow. Others allow full deferral, but the accrued interest will add to what you owe. Private loan terms vary by lender, so read your promissory note for the interest calculation method, any rate adjustments, and rate caps before signing.
Current Federal Interest Rates
Federal student loan rates are set each year based on the 10-year Treasury note auction in May, then stay fixed for the life of each loan disbursed during that academic year. For loans first disbursed between July 1, 2025, and June 30, 2026:4Federal Student Aid. Interest Rates and Fees
- Direct Subsidized and Unsubsidized Loans for undergraduates: 6.39% fixed.
- Direct Unsubsidized Loans for graduate and professional students: 7.94% fixed.
- Direct PLUS Loans for parents and graduate students: 8.94% fixed.
These rates won’t change over the life of the loan. Private loans may be fixed or variable; variable rates are typically tied to a benchmark like SOFR plus a lender-set margin and can rise or fall with market conditions.
How the Interest Is Calculated
Federal loans and most private loans use a simple daily interest formula. Your servicer calculates each day’s charge this way:5Edfinancial Services. Payments, Interest, and Fees
Daily interest = (current principal balance × interest rate) ÷ 365.25
The 365.25 divisor accounts for leap years. On a $10,000 balance at 5.5%, that’s about $1.51 per day. Payments apply first to any outstanding interest, then to principal. The lower your principal, the less interest accrues, which is why small extra payments early can save real money over time.
Miss or delay a payment, and interest keeps piling on the full balance during the gap. The Department of Education does not charge late fees on federal Direct Loans, but private lenders often do, usually as a percentage of the monthly payment.5Edfinancial Services. Payments, Interest, and Fees
When Unpaid Interest Becomes Principal
Capitalization is what happens when unpaid interest gets added to your principal, so you start paying interest on a bigger balance. It’s the mechanism that quietly makes an unsubsidized loan more expensive than the sticker rate suggests.6Federal Student Aid. What Is Interest Capitalization on a Student Loan Your monthly payment can also rise after capitalization because it’s recalculated against the new balance.
For federal Direct Loans held by the Department of Education, capitalization now happens only in limited situations:7Nelnet – Federal Student Aid. Interest Capitalization
- When a deferment ends on an unsubsidized loan, the deferment-period interest folds into principal.
- Certain income-driven repayment plan changes, such as leaving IBR, missing your annual income recertification, or no longer qualifying for a reduced payment.
- Federal loan consolidation, where all outstanding unpaid interest capitalizes into the new Direct Consolidation Loan’s principal.8Federal Student Aid. 5 Things to Know Before Consolidating Federal Student Loans
The way to avoid capitalization is to pay at least the accruing interest during school, grace, or deferment, even when no payment is required.
Deferment vs. Forbearance
Both let you pause payments, but they treat interest differently.
Deferment
During a qualifying deferment, the government keeps paying interest on Direct Subsidized Loans, so the balance holds steady.2eCFR. 34 CFR Part 685 William D. Ford Federal Direct Loan Program On Direct Unsubsidized Loans and PLUS Loans, interest accrues throughout the deferment and capitalizes when it ends. Qualifying reasons include returning to school at least half-time, active military service, and economic hardship.
Forbearance
Interest accrues on every loan type during forbearance, including subsidized loans. For Direct Loans held by the Department of Education, that unpaid interest is not added to principal when the forbearance ends.9Consumer Financial Protection Bureau. What Is Student Loan Forbearance You still owe it, but it doesn’t compound into a larger balance. On older federal loans not held by the Department of Education, such as some FFEL loans, forbearance-period interest may capitalize when forbearance ends.
Because interest still runs during forbearance, using it for long stretches raises your total repayment cost. An income-driven repayment plan is usually the better long-term option if you can’t make payments.
The 6% Cap for Active-Duty Servicemembers
Active-duty servicemembers can cap the interest rate on student loans taken out before entering military service at 6% per year under the Servicemembers Civil Relief Act. The lender must forgive any interest above 6% and refund excess interest already paid for the period of active-duty service.10U.S. Department of Justice. 6% Interest Rate Cap for Servicemembers on Pre-service Debts The cap covers both federal and private loans, as long as the debt was incurred before active duty began. You’ll usually need to send the lender a copy of your military orders to trigger it.
The Student Loan Interest Deduction
You can deduct up to $2,500 per year in student loan interest paid on qualifying education loans, and you don’t have to itemize to claim it.11Office of the Law Revision Counsel. 26 USC 221 Interest on Education Loans It applies to both federal and private loans used for qualified higher education expenses.
For tax year 2026, the deduction phases out at these income levels:12Internal Revenue Service. Rev. Proc. 2025-32
- Single filers: phases out between $85,000 and $100,000 in modified adjusted gross income (MAGI); above $100,000 you can’t claim it.
- Joint filers: phases out between $175,000 and $205,000 MAGI; above $205,000 you can’t claim it.
If you paid $600 or more in interest during the year, your servicer will send you Form 1098-E.13Internal Revenue Service. Instructions for Forms 1098-E and 1098-T If you paid less, you can still claim the deduction; you’ll just need to track the amount yourself.
What Changes for Loans Disbursed After July 1, 2026
The One Big Beautiful Bill Act reshapes federal student lending for loans first disbursed on or after July 1, 2026. Existing income-driven plans, including IBR, PAYE, and SAVE, are replaced for those new loans by a single Repayment Assistance Plan (RAP). Borrowers with both older and newer loans are limited to either RAP or standard repayment plans for the new loans.14Federal Register. Reimagining and Improving Student Education
Other changes include the phase-out of Graduate PLUS Loans for new borrowers, new annual and lifetime borrowing limits for graduate students, and a $20,000 annual cap with a $65,000 lifetime limit on Parent PLUS Loans per dependent student. Undergraduate subsidized and unsubsidized loan limits remain unchanged, which means the subsidized loan’s interest-free periods continue to exist for undergraduates who qualify on the FAFSA.