Is an Unsubsidized Loan Interest Free? Rates, Accrual, and Capitalization

No, a Direct Unsubsidized Loan is not interest-free. Unsubsidized loan interest starts building the day the money is disbursed to your school and keeps building during enrollment, your six-month grace period, and any deferment or forbearance. The federal government does not cover any of it. You do.¹ For loans first disbursed between July 1, 2025, and June 30, 2026, the rate is 6.39 percent for undergraduates and 7.94 percent for graduate and professional students.²

When the Interest Clock Starts

Interest begins the moment the federal government releases funds to your school. Not when you graduate. Not when repayment begins. Not when you get your first bill.¹ That first disbursement typically lands at the start of a semester or quarter, and if your loan comes in multiple disbursements, each one starts its own clock on the day it hits.

This is the defining feature that separates unsubsidized loans from subsidized ones. On subsidized loans, the government pays the interest during enrollment and certain other periods. On unsubsidized loans, you are on the hook for every day of interest from the first disbursement until the loan is paid off.³

How the Daily Interest Is Calculated

Unsubsidized loans use a daily simple-interest formula. Each day, your outstanding principal balance is multiplied by an interest rate factor (the annual rate divided by the number of days in the year), and that gives you the interest for that day.¹ Written out:

Interest Amount = Outstanding Principal Balance × Interest Rate Factor × Number of Days Since Last Payment

A worked example makes the stakes clearer. Borrow $10,000 at the current 6.39 percent undergraduate rate and roughly $1.75 of interest piles on every single day. Over four years of school with no payments, that is about $2,557 in interest sitting on top of what you originally borrowed, before you have made a single payment.

What Happens During School, Grace, Deferment, and Forbearance

You are not required to make payments on an unsubsidized loan while you are enrolled at least half-time, during the six-month grace period after you leave school, or during an approved deferment or forbearance.⁴ A paused payment is not a frozen balance, though. Interest keeps running the whole time.

You can make voluntary interest payments in any of these windows, and this is where small amounts matter a lot. Covering just the monthly interest keeps your balance from growing beyond what you borrowed. On that same $10,000 loan at 6.39 percent, roughly $53 a month holds the balance steady. Skip the voluntary payments and the unpaid interest sits on your account, waiting for a potential capitalization event.

How Interest Capitalization Works

Capitalization is what turns unpaid interest into something worse than unpaid interest. When accrued interest capitalizes, it is added to your principal balance. From that point on, you pay interest on the larger total. Interest on interest.⁵ Borrow $20,000, let $2,000 of interest accrue in school, and capitalization pushes your principal to $22,000. All future interest is calculated on $22,000, not $20,000.

Current Rules for Direct Loans

The Department of Education eliminated several capitalization triggers for Direct Loans in a 2022 regulatory change.⁶ Interest that accrues while you are in school, during the grace period, and during forbearance is no longer rolled into your Direct Loan principal.⁷ That unpaid interest still exists and still has to be paid, but it is tracked separately rather than becoming new principal.

When Capitalization Still Happens

Capitalization has not disappeared. For Direct Loans, interest still capitalizes when you exit a period of deferment on an unsubsidized loan, and when you leave the Income-Based Repayment plan or your IBR payment climbs to the standard 10-year amount.⁷ Older federal loans not owned by the federal government may still follow the pre-2022 rules, including capitalization after the grace period and after certain forbearance periods.

The practical move: if you can see a capitalization trigger coming, pay down as much accrued interest as you can before it hits. Any amount you pay off first is an amount that cannot capitalize.

How Your Rate Is Set and What It Is Now

Your interest rate is fixed on the day your loan is disbursed and stays fixed for the life of that loan. It will not move with the economy. Each academic year’s loans get their own rate, so if you borrow across multiple years, you may end up with several loans at different rates.

For loans first disbursed between July 1, 2025, and June 30, 2026:²

Undergraduate unsubsidized loans: 6.39 percent
Graduate and professional unsubsidized loans: 7.94 percent

The 2024–2025 rates were slightly higher at 6.53 percent for undergraduates and 8.08 percent for graduate students.⁸

Ways to Reduce What Interest Costs You

Because interest runs from day one, early action pays off more than late action.

Make interest-only payments while you are in school. You are not required to, but even partial coverage keeps the balance from growing. On a $20,000 loan at 6.39 percent, paying roughly $106 a month through four years of school and six months of grace prevents more than $5,700 in interest from piling up.
Think twice before taking a deferment on an unsubsidized loan. Interest accrues the whole time, and exiting deferment is one of the remaining capitalization triggers for Direct Loans. If you can keep paying through a rough stretch, do.
Clear accrued interest before any capitalization event. If you are about to leave deferment or shift out of IBR, paying off outstanding interest first stops it from folding into principal.
Borrow only what you need. Every borrowed dollar generates daily interest from the moment it is disbursed.
Pick the shortest repayment term you can afford. The standard 10-year plan charges less total interest than extended or graduated plans because the principal comes down faster.

The Interest You Pay Is Tax-Deductible

You can deduct up to $2,500 per year in student loan interest on your federal tax return, and you do not have to itemize to claim it. It is taken as an adjustment to income and applies to both subsidized and unsubsidized federal loans as well as qualifying private student loans.⁹

The deduction phases out at higher incomes. For tax year 2025, the phase-out range is $85,000 to $100,000 for single filers and $170,000 to $200,000 for married couples filing jointly. If your loan servicer collects at least $600 in interest from you during the year, you will receive Form 1098-E showing the amount paid.¹⁰ If you paid less than $600, you can still claim the deduction; you just may need to pull the figure from your servicer’s online account instead of waiting for a form in the mail.

1
Federal Student Aid. Top 4 Questions: Direct Subsidized Loans vs. Direct Unsubsidized Loans
2
FSA Knowledge Center. Interest Rates for Direct Loans First Disbursed Between July 1, 2025 and June 30, 2026
3
Federal Student Aid. Am I Eligible for a Direct Unsubsidized Loan?
4
Consumer Financial Protection Bureau. When and How Do I Start Paying My Student Loans?
5
Federal Student Aid. What Is Interest Capitalization on a Student Loan?
6
Federal Register. Improving Income Driven Repayment for the William D. Ford Federal Direct Loan Program
7
Consumer Financial Protection Bureau. Tips for Paying Off Student Loans More Easily
8
FSA Knowledge Center. Interest Rates for Direct Loans First Disbursed Between July 1, 2024 and June 30, 2025
9
Internal Revenue Service. Student Loan Interest Deduction
10
Internal Revenue Service. About Form 1098-E, Student Loan Interest Statement