Interest on a federal unsubsidized loan or a private student loan starts accruing the day the money is disbursed to your school. On a federal subsidized loan, the government pays the interest while you’re enrolled at least half-time and through your six-month grace period, so your own interest clock doesn’t start until that grace period ends. The loan type is what drives the answer, and the gap between the two can add up to thousands of dollars before you ever make a required payment.
When Interest Starts, By Loan Type
The subsidized versus unsubsidized distinction decides more of your long-term cost than most borrowers realize.
Direct Unsubsidized Loans. Interest begins accruing on the disbursement date and keeps building while you’re in school, during your grace period, during any deferment, and during any forbearance. All of it is yours to pay.1Federal Student Aid. Direct Loan Borrowers Rights and Responsibilities Statement If the loan is split into two disbursements across a school year, each installment starts its own clock on the day it lands.
Direct Subsidized Loans. The federal government covers your interest while you’re enrolled at least half-time and during the six-month grace period after you leave school.2Federal Student Aid. Top 4 Questions – Direct Subsidized Loans vs Direct Unsubsidized Loans One narrow exception: if your subsidized loan was first disbursed between October 1, 2012, and June 30, 2014, the government pays interest for only the first three months of your grace period rather than all six.3Federal Student Aid. What Is a Grace Period
Private student loans. Loans from banks and credit unions almost always start accruing interest at disbursement, and there’s no subsidized version. Grace period terms, if the lender offers any, vary by lender.
One more date to know: federal interest resumed charging on September 1, 2023 after the COVID-era pause, so any federal loan you already held before then went back to its original fixed rate on that date.4National Credit Union Administration. Resumption of Federal Student Loan Payments
What Happens During the Six-Month Grace Period
Both Direct Subsidized and Direct Unsubsidized Loans give you a six-month grace period that begins when you graduate, leave school, or drop below half-time enrollment. You don’t have to make payments during that window.3Federal Student Aid. What Is a Grace Period
A payment break is not always an interest break. On subsidized loans, the government keeps paying the interest for the full six months (with the 2012–2014 exception noted above). On unsubsidized loans, interest accrues the entire time. You can pay it as it builds or let it sit, but if you let it sit, it will be added to your principal when you enter repayment, and future interest will be calculated on the larger balance.3Federal Student Aid. What Is a Grace Period
The dollar impact adds up quickly. On a $30,000 unsubsidized loan at 6.39%, six months of unpaid interest comes to roughly $960 before your first required payment is even due.
If you’re called to active military duty for more than 30 days before your grace period ends, the clock pauses and restarts when you return. That can extend the total window by up to three years.
Interest During Deferment and Forbearance
Deferment and forbearance both pause payments, but they handle interest differently, and that difference depends on your loan type.
In deferment, the government pays interest on subsidized loans, Federal Perkins Loans, and the subsidized portion of a consolidation loan. You are responsible for interest on unsubsidized loans, PLUS loans, and the unsubsidized portion of a consolidation loan. That unpaid interest will be capitalized at the end of the deferment.5Federal Student Aid. Loan Deferment
In forbearance, interest accrues on every federal loan type, including subsidized loans. The government does not step in. That is where forbearance gets expensive: twelve months of forbearance on a $40,000 balance at 6.39% adds roughly $2,556 in interest without reducing the balance at all.
How Unpaid Interest Gets Added to Your Balance
Capitalization is the moment accrued interest is folded into your principal, so that going forward you pay interest on interest. The Department of Education has narrowed the triggers for capitalization on loans it holds. As of 2026, interest capitalizes only in these situations:6Federal Student Aid. Interest Capitalization
- At the end of a deferment, unpaid interest on unsubsidized loans is capitalized.
- On the Income-Based Repayment plan, interest is capitalized if you voluntarily leave the plan, miss your annual recertification deadline, or no longer qualify for a reduced payment after recertification.
Several events that used to trigger capitalization no longer do on loans held by the Department of Education: leaving the grace period, exiting forbearance, and leaving other repayment plans. Interest still accrues during those periods. It just won’t be folded into your principal when the period ends.
Consolidation Resets the Clock
A Direct Consolidation Loan pays off your existing federal loans and replaces them with one new loan. Interest starts accruing on the new balance right away, and any unpaid interest from the old loans is rolled into the new principal. The new rate is the weighted average of the old rates, rounded up to the nearest one-eighth of a percent, so your blended rate will always be slightly higher than a true average.7Federal Student Aid. Student Loan Consolidation
Consolidating during your grace period ends it. A consolidation loan does not come with a new grace period, and your first payment is typically due within 60 days of disbursement.8Federal Student Aid. Federal Consolidation Loans in a Nutshell
What Daily Accrual Looks Like in Dollars
Federal student loan interest is calculated with a simple daily interest formula:9Federal Student Aid. Loan Interest Rates
Daily interest = (outstanding principal balance × interest rate) ÷ number of days in the year
On a $35,000 balance at 6.39%, that’s about $6.13 a day, or roughly $184 over a 30-day month. Any payment smaller than that monthly interest figure won’t touch your principal. It is why the first years of repayment can feel static and why extra dollars applied to principal change the math over the life of the loan.
Current Federal Interest Rates
Federal loan rates are fixed for the life of the loan and are set each year based on the 10-year Treasury note auction. For loans first disbursed between July 1, 2025, and June 30, 2026:9Federal Student Aid. Loan Interest Rates
- Direct Subsidized and Unsubsidized (undergraduate): 6.39%
- Direct Unsubsidized (graduate/professional): 7.94%
- Direct PLUS (parent and graduate): 8.94%
For the 2026–2027 academic year, rates ticked up: 6.52% for undergraduate loans, 8.07% for graduate unsubsidized, and 9.07% for PLUS loans.10Federal Student Aid. Interest Rates for Federal Direct Loans First Disbursed Between July 1, 2026, and June 30, 2027 Your rate is locked at disbursement, so older loans carry whatever rate was in effect the year you took them out.
You can confirm the loan type, interest rate, and accrued interest on each of your federal loans by logging into studentaid.gov, which also shows your assigned servicer.11Federal Student Aid. Who’s My Student Loan Servicer That is the fastest way to see which of your loans are quietly accruing right now and which are not.