Student loans are not interest-free, with one narrow exception: federal Direct Subsidized Loans, on which the U.S. Department of Education pays your interest while you’re in school at least half-time, during your six-month grace period, and during qualifying deferments. Every other student loan — Direct Unsubsidized, PLUS, and private — starts accruing interest the day the money is disbursed, even if you don’t have to make payments yet.
The One Loan With Interest-Free Periods
Direct Subsidized Loans are the only federal student loans on which interest doesn’t accrue during certain periods. Eligibility is limited to undergraduate students who demonstrate financial need through the FAFSA. Graduate and professional students lost access to 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
During three specific windows, the Department of Education pays the interest on your subsidized loans so your balance holds steady: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 an approved deferment, such as returning to school or economic hardship.
Outside these windows — once repayment begins — interest accrues on subsidized loans like any other loan.
Loans That Accrue Interest From Day One
Direct Unsubsidized Loans and private student loans begin accruing interest the moment funds are disbursed. There is 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 you’re in school, but interest is still building on your balance the entire time, plus through your grace period and any deferment or forbearance.
That accumulation isn’t small. A $10,000 unsubsidized loan at 6.39% accrues roughly $639 in interest per year. Over a four-year degree, that’s about $2,556 added to what you owe before you make a single payment. If you receive both subsidized and unsubsidized loans, spending the subsidized portion first limits how much unsubsidized interest builds up while you’re still enrolled.
Some private lenders offer in-school interest-only payments so your balance doesn’t grow. Others let you defer all payments until after graduation, but the accrued interest still ends up part of your debt. Terms vary widely, so the promissory note is where you’ll find the specific interest calculation, adjustment frequency, and any rate caps.
Current Federal Student Loan Interest Rates
Federal rates are set each year based on the May 10-year Treasury note auction and stay fixed for the life of each loan. 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
Private student loans may carry either fixed or variable rates. Variable rates are typically tied to a benchmark such as the Secured Overnight Financing Rate (SOFR) plus a lender-set margin, so they can rise or fall over time.
How the Interest Is Calculated
Federal loans and most private loans use a simple daily interest formula rather than compounding. Your servicer figures the daily 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 a day. Every payment you make covers outstanding interest first, with anything left over reducing principal. Smaller principal means less daily interest, which is why extra payments early in repayment save real money over the life of the loan.
Miss a payment and interest keeps accruing on the full balance. The next payment then covers more interest and less principal. The Department of Education doesn’t charge late fees on federal Direct Loans, but private lenders commonly do, usually as a percentage of the monthly payment.5Edfinancial Services. Payments, Interest, and Fees
When Unpaid Interest Gets Added to Your Balance
Capitalization is when unpaid interest is folded into your principal. From that point on, you pay interest on the larger amount, and your monthly payment may be recalculated upward.6Federal Student Aid. What Is Interest Capitalization on a Student Loan
For federal Direct Loans held by the Department of Education, capitalization only happens in specific situations:7Nelnet – Federal Student Aid. Interest Capitalization
- When a deferment ends on an unsubsidized loan, any interest that accrued during the deferment is added to principal.
- Certain income-driven repayment (IDR) changes, such as leaving the IBR plan, failing to recertify income by the annual deadline, or no longer qualifying for a reduced payment.
- Federal loan consolidation, which capitalizes all outstanding unpaid interest into the new Direct Consolidation Loan’s principal.8Federal Student Aid. 5 Things to Know Before Consolidating Federal Student Loans
The most effective defense is to pay at least the accruing interest during school, grace, or deferment, even when no payment is required. Even a modest monthly amount that covers just the interest keeps it from becoming part of your principal later.
Deferment and Forbearance Are Not Interest-Free
These two pauses look similar but treat interest very differently, and this is where borrowers most often assume their loans have stopped accruing when they haven’t.
Deferment
During a qualifying deferment, the government continues paying interest on Direct Subsidized Loans, so the balance is unchanged.2eCFR. 34 CFR Part 685 William D. Ford Federal Direct Loan Program On Direct Unsubsidized and PLUS Loans, interest accrues throughout the deferment and capitalizes when the deferment ends. Qualifying reasons include returning to school at least half-time, active military service, and economic hardship.
Forbearance
During forbearance, interest accrues on all loan types, including subsidized loans. For Direct Loans held by the Department of Education, unpaid interest that builds during forbearance is not added to your principal.9Consumer Financial Protection Bureau. What Is Student Loan Forbearance The interest is still owed, but it doesn’t capitalize. For older federal loans not held by the Department of Education, such as some FFEL Program loans, interest that accrues during forbearance may capitalize when it ends.
Because interest still accumulates in forbearance even when it doesn’t capitalize on Direct Loans, extended use raises the total cost of the loan. If payments are the problem, an income-driven repayment plan is usually a better long-term option.
Ways to Reduce What Interest Costs You
The 6% Cap for Active-Duty Servicemembers
Under the Servicemembers Civil Relief Act (SCRA), active-duty servicemembers can cap the interest rate on student loans taken out before entering military service at 6% per year. The lender must forgive interest above 6% and refund any excess already paid during 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 student loans, as long as the debt existed before active duty began. Lenders generally require a copy of the military orders to apply the reduction.
The Student Loan Interest Tax 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 interest paid on both federal and private loans used for qualified higher education expenses.
For tax year 2026, the deduction phases out at higher incomes: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, no deduction.
- Joint filers: phases out between $175,000 and $205,000 in MAGI; above $205,000, no deduction.
If you paid $600 or more in student loan interest during the year, your servicer sends you Form 1098-E.13Internal Revenue Service. Instructions for Forms 1098-E and 1098-T Paid less than that? You can still claim the deduction, but you’ll need to track the amount yourself.