Interest accrual depends on the loan type and whether you're in school full-time

Whether your student loans accrue interest while you're in school depends entirely on which type of loan you have. Federal subsidized loans do not accrue interest while you're enrolled at least half-time. Federal unsubsidized loans and private student loans accrue interest from the moment the money is disbursed, even if you're still taking classes and not making payments yet.

The difference matters because interest that accrues while you're in school gets added to your loan balance. When you graduate or drop below half-time enrollment, you'll owe more than you originally borrowed — sometimes significantly more if you were in school for four years or longer.

Understanding which loans you have is the first step to knowing what you actually owe when repayment begins. Your loan documents and your Federal Student Aid account both show the loan type for each loan you received.

Key Takeaways

  • Federal subsidized loans do not accrue interest while you attend school at least half-time; the government pays the interest during this period.
  • Federal unsubsidized loans and all private student loans accrue interest when ready, and unpaid interest is added to your principal balance when you graduate.
  • Interest that accrues while you're in school is called capitalization when it's added to your balance, and it increases the total amount you repay.
  • You can see which type of loan each one is by logging into your Federal Student Aid account or reviewing your loan promissory notes.

How federal subsidized loans work during school

With a federal subsidized loan, the U.S. Department of Education pays the interest while you're enrolled at least half-time. This is the subsidy — the government covers the cost of borrowing during school. You don't have to make payments during this time, and no interest accumulates on your balance.

The half-time enrollment requirement means you must be taking at least six credit hours per semester (the standard varies slightly by school, so check with your financial aid office). If you drop below half-time status, the subsidy ends and interest begins accruing when ready, even if you're still in school.

When you graduate, leave school, or drop below half-time enrollment, you enter a six-month grace period. During this time, you still don't have to make payments, but interest does accrue. After the grace period ends, you begin repayment on the original loan amount — with no added interest from the school years.

How federal unsubsidized loans accrue interest during school

With a federal unsubsidized loan, interest accrues from the day the loan is disbursed. You don't have to make payments while you're in school, but the interest is still accumulating on your balance. This is the key difference from subsidized loans: you're responsible for the cost of borrowing, not the government.

During school, you have three choices with unsubsidized loans. You can pay the interest as it accrues (the most expensive option long-term if you don't). You can let it accrue and pay it when repayment begins. Or you can let it accrue and have it capitalized — added to your principal — when you graduate or leave school.

If you choose capitalization, the accrued interest becomes part of your loan balance. You then pay interest on that interest for the rest of your repayment period. A $5,000 unsubsidized loan taken out freshman year could grow to $5,500 or more by graduation, depending on the interest rate and how long you were in school, even if you never made a payment.

How private student loans accrue interest during school

Private student loans, issued by banks and other lenders rather than the federal government, almost always accrue interest while you're in school. The terms vary by lender and by the specific loan product, but interest begins accumulating when ready after the money is disbursed.

Some private lenders offer an option to pay interest while you're in school. Others require you to capitalize the interest — add it to the balance — when repayment begins. A few allow you to defer payments entirely, but interest still accrues and is capitalized at graduation.

Because private loan terms vary widely, check your promissory note or contact your lender to confirm whether interest is accruing and what happens to it when you graduate. Private loans don't have the federal grace period, so repayment often begins shortly after you leave school.

What happens to accrued interest when you graduate

When you graduate or stop attending school, any interest that has accrued on unsubsidized and private loans is capitalized — added to your principal balance. This is automatic unless you've been paying the interest as it accrues.

Capitalization increases the amount you owe and the total interest you'll pay over the life of the loan. If you borrowed $20,000 in unsubsidized loans and $2,000 in interest accrued during school, your new principal is $22,000. You'll pay interest on that $22,000 for the next 10, 20, or 25 years, depending on your repayment plan.

Federal subsidized loans do not capitalize interest from the school years because no interest accrued. Your balance remains what you originally borrowed.

How to find out which type of loans you have

Log into your account at studentaid.gov using your FSA ID. Under "Loans," you'll see each loan listed with its type: Direct Subsidized, Direct Unsubsidized, Direct PLUS, or a private loan from a specific lender. The loan type tells you whether interest is accruing right now.

If you're still in school, check your enrollment status on the same site. The federal loan servicer uses this information to determine whether your subsidized loans are in subsidy status (interest covered by the government) or not.

Your loan documents — the promissory note you signed when you took out each loan — also list the loan type and the interest rate. If you can't find these documents, your loan servicer can send them to you or show them in your online account.

Strategies to reduce interest accrual while in school

If you have unsubsidized loans, paying even small amounts of interest while you're in school reduces what gets capitalized at graduation. You don't have to pay the full interest — any payment reduces the amount that will be added to your balance.

Some borrowers make quarterly interest payments on unsubsidized loans while in school, then switch to full payments after graduation. Others wait until after graduation to address the accrued interest. There's no requirement to pay during school, but the math favors paying if you can afford it.

For private loans, contact your lender to ask whether you can make interest-only payments while in school. Not all lenders offer this option, but some do. If your lender allows it, making these payments can save you money over the life of the loan.

Frequently Asked Questions

Does interest accrue on federal subsidized loans if I take a semester off?

If you're not enrolled at least half-time, the subsidy ends and interest begins accruing when ready, even if you plan to return. Once you re-enroll at half-time or more, the subsidy resumes and accrual stops. Contact your loan servicer to confirm your enrollment status if you're unsure.

What's the difference between accruing interest and capitalizing interest?

Accruing means interest is building up on your loan. Capitalizing means that accrued interest is added to your principal balance. Once interest is capitalized, you pay interest on it for the rest of your loan term. With subsidized loans, interest never accrues during school, so capitalization never happens from those years.

Can I pay off accrued interest before it capitalizes?

Yes. If you pay the accrued interest on an unsubsidized loan before it capitalizes at graduation, that interest doesn't get added to your balance. You can pay it in full or in part — any amount you pay reduces what gets capitalized. Your loan servicer can tell you the exact accrued amount.

Do Parent PLUS loans accrue interest while my child is in school?

Yes. Parent PLUS loans accrue interest from disbursement, just like unsubsidized loans. Parents can choose to pay interest while the student is in school, or let it accrue and capitalize at graduation. The terms are set by the federal government, not by the school or lender.

If I'm in graduate school, do my undergraduate loans still accrue interest?

No. Subsidized loans from your undergraduate years remain in subsidy status as long as you're enrolled at least half-time in graduate school. Unsubsidized loans continue to accrue interest regardless of your enrollment level or program.