You do not have to pay unsubsidized loans while in school. As long as you’re enrolled at least half-time, your Direct Unsubsidized Loans sit in an automatic in-school deferment, and no monthly payment is due. The catch is that interest accrues from the day each loan is disbursed, and the federal government does not cover it for you the way it does on subsidized loans. Every dollar of that interest you leave unpaid eventually gets added to your principal, so skipping payments is allowed but it is not free.
Why Interest Still Builds While You’re Enrolled
With a subsidized loan, the government pays the interest while you’re in school at least half-time, during the grace period, and during certain deferments. With an unsubsidized loan, you are responsible for all interest from first disbursement until the loan is paid off.1eCFR. 34 CFR 685.202 – Charges for Which Direct Loan Program Borrowers Are Responsible
Interest accrues daily on a simple-interest formula. Your servicer multiplies your current principal by the interest rate, then divides by 365.25 to get the daily charge.2Edfinancial Services. Payments, Interest, and Fees For loans first disbursed between July 1, 2025, and June 30, 2026, the fixed rate is 6.39% for undergraduate Direct Unsubsidized Loans and 7.94% for graduate and professional ones.3Federal Student Aid. Interest Rates and Fees On a $10,000 undergraduate loan at 6.39%, that’s roughly $1.75 a day, or about $53 a month, piling up quietly whether or not you make a payment. Each year’s loan keeps its own fixed rate for life, so your freshman-year loan does not change rate when later rates do.
How In-School Deferment and the Grace Period Work
As long as you’re enrolled at least half-time in an eligible program, your unsubsidized loans are automatically deferred. Half-time generally means at least six credit hours per semester for undergraduates, though your school sets its own threshold. Your school reports your enrollment to the Department of Education, and the deferment continues until you graduate, withdraw, or drop below half-time.
Once that happens, a six-month grace period begins. You still owe no required payments during those six months, but interest keeps accruing on unsubsidized balances. The grace period generally applies only once per loan. If you use the full six months and then re-enroll, your loans go back into deferment, but you typically won’t get a new grace period on those same loans when you leave school again. If you return to school before the first grace period runs out, you may be eligible for a fresh six-month window after your next separation.
What Capitalization Costs You If You Don’t Pay
When your grace period ends and repayment begins, any unpaid interest that built up during school and the grace period gets added to your principal. That’s called capitalization, and once it happens, you start paying interest on the interest.1eCFR. 34 CFR 685.202 – Charges for Which Direct Loan Program Borrowers Are Responsible
A concrete example: borrow $20,000 in unsubsidized loans at 6.39%, attend four years, and make no interest payments. By the end of the grace period, roughly $5,600 in interest has accumulated. After capitalization your new principal is about $25,600, and daily interest from that point forward is calculated on the higher amount. Across a standard 10-year repayment plan, that capitalized interest generates its own additional interest charges.
Capitalization can also be triggered later by other events. Consolidating federal loans into a Direct Consolidation Loan causes any unpaid interest to capitalize immediately.4Federal Student Aid. 5 Things to Know Before Consolidating Federal Student Loans Switching between certain repayment plans can do the same. Each event resets your principal to a higher baseline.
Should You Pay Voluntarily?
You can make payments on an unsubsidized loan at any time during school, and federal student loans carry no prepayment penalty.5Federal Student Aid. Repaying Your Loans If you cover just the accruing interest each month — roughly $53 per $10,000 borrowed at 6.39% — your principal stays flat, and you enter repayment owing only what you originally borrowed.
Compare the two outcomes on a single $10,000 loan over four years of school. Paying the interest each month costs about $2,544 in total. Letting it ride results in roughly $2,800 of accrued interest capitalized into principal, after which you pay interest on that larger balance for another 10 years. The longer you’re in school, the wider the gap.
If paying the full monthly interest isn’t realistic, partial payments still help. Any amount you pay reduces how much eventually capitalizes, which lowers your future monthly bill.
How to Make a Payment and How It’s Applied
You can find your assigned loan servicer by logging into studentaid.gov. Most servicers let you make one-time payments or set up recurring transfers from a bank account through their online portals.
Federal regulations require servicers to apply each payment in a set order: first to any outstanding fees or collection costs, then to accrued interest, and finally to principal.6eCFR. 34 CFR 685.211 – Miscellaneous Repayment Provisions A payment that matches your monthly interest accrual keeps the balance from growing; anything beyond that chips away at principal.
A Tax Break for Paying Interest Early
Interest you pay on federal student loans, including voluntary in-school payments, may qualify for the student loan interest deduction. It reduces your taxable income by up to $2,500 a year and is taken as an adjustment to income, so you don’t need to itemize.7Internal Revenue Service. Publication 970, Tax Benefits for Education
The deduction phases out at higher incomes. For the 2025 tax year, it begins to shrink when modified adjusted gross income falls between $85,000 and $100,000 for single filers, or between $170,000 and $200,000 for joint filers, and disappears above those upper thresholds.7Internal Revenue Service. Publication 970, Tax Benefits for Education If you pay $600 or more in interest in a year, your servicer sends you Form 1098-E documenting the amount.8Internal Revenue Service. Form 1098-E Student Loan Interest Statement You can still claim the deduction on smaller amounts; the servicer just isn’t required to send the form automatically, so keep your payment records.
If You Withdraw Before Finishing
Dropping below half-time ends your deferment and starts the six-month grace clock, but withdrawing partway through a term carries an added wrinkle. If you withdraw from all classes before completing 60% of the enrollment period, your school must calculate how much of your federal aid was “unearned” and return that portion to the Department of Education under the Return of Title IV Funds rules. Loan funds the school returns on your behalf reduce your balance, but any aid already sent to you for living expenses may need to be repaid, and you could owe the school directly for tuition the returned aid had covered. Withdrawing does not erase interest that has already accrued, and repayment on the remaining balance still begins after the grace period.