Interest accrual depends on the type of loan you have

Whether your student loans accrue interest while you are in school depends entirely on the loan type. Federal subsidized loans do not accrue interest while you are enrolled at least half-time. The U.S. Department of Education pays the interest for you during school, during your grace period after graduation, and during certain deferment periods. Federal unsubsidized loans and all private student loans accrue interest from the moment they are disbursed, even while you are still taking classes.

This distinction matters because interest that accrues while you are in school gets added to your loan balance. When you start repayment, you will owe more than you originally borrowed if interest has been accumulating. Understanding which loans you have is the first step to knowing what to expect when repayment begins.

Key Takeaways

  • Federal subsidized loans do not accrue interest while you are enrolled at least half-time in school.
  • Federal unsubsidized loans and all private loans accrue interest immediately, and that interest is added to what you owe when repayment starts.
  • You can pay interest while in school to prevent it from being capitalized, or you can let it capitalize and pay a larger balance later.
  • Your loan documents and your loan servicer's website show which loans are subsidized and which are unsubsidized.

How federal subsidized loans work during school

When you take out a federal subsidized loan, the government covers the interest while you meet certain conditions. You must be enrolled at least half-time — usually six credit hours per semester, though this varies by school. The subsidy continues through your grace period, which is typically six months after you graduate or drop below half-time enrollment. During that time, no interest accrues on your balance.

If you later enter deferment or forbearance — periods when you temporarily pause payments — subsidized loans continue to have no interest accrue. This is one of the key protections of subsidized loans. However, subsidized loans are also limited in amount. Undergraduates can borrow a maximum of $3,500 in subsidized loans in their first year, $4,500 in the second year, and $5,500 in the third year and beyond, though these amounts vary slightly by school and program.

How federal unsubsidized and private loans accrue interest during school

Unsubsidized federal loans and private loans begin accruing interest the day the money is disbursed to your school. This happens whether you are in class, on break, or have graduated. The interest compounds, meaning interest accrues on top of interest. By the time you finish school, you may owe significantly more than you borrowed.

For example, if you borrow $10,000 in unsubsidized federal loans at a 6.33% interest rate (the rate for loans disbursed in the 2023–2024 school year), approximately $633 in interest will accrue over one year if you make no payments. That interest is then added to your principal balance. When you enter repayment, you owe $10,633, not $10,000.

Private loan interest rates vary by lender and your creditworthiness. Some private loans have variable rates that change over time. Interest accrual works the same way: it begins immediately and compounds until you start making payments.

What happens to accrued interest when repayment begins

When you finish school or drop below half-time enrollment, your grace period begins. For federal loans, this is typically six months. During the grace period, you do not have to make payments, but interest continues to accrue on unsubsidized and private loans. At the end of the grace period, when your first payment is due, any accrued interest is capitalized — added to your principal balance.

Capitalization matters because you then pay interest on that interest. If $2,000 in interest has accrued on a $20,000 unsubsidized loan, your new balance is $22,000. Your monthly payment and total interest paid over the life of the loan are calculated based on that higher amount. This is why paying interest while in school, if you can, reduces what you ultimately owe.

Paying interest while you are still in school

You can choose to pay interest on unsubsidized and private loans while you are in school, even though payments are not required. If you pay the interest as it accrues, that interest is not capitalized when repayment begins. Your balance stays at what you originally borrowed.

Making interest-only payments while in school is not always possible — many students cannot afford it. But if you can pay even part of the accrued interest, you reduce the amount that will be capitalized. Some students make small monthly payments during school, then switch to full repayment after graduation. Your loan servicer can tell you how much interest has accrued on each loan and accept payments at any time, even during school.

How to find out which loans you have

Log into your account on studentaid.gov, the federal student loan database. Under "My Loans," you will see each loan listed with its type: subsidized, unsubsidized, or PLUS. The loan type determines whether interest accrues while you are in school. Your loan servicer — the company that manages your payments — also has this information and can answer questions about your specific loans.

If you have private loans, log into your lender's website or contact them directly. Private loan documents spell out when interest begins accruing and how it is calculated. The terms vary widely by lender.

Frequently Asked Questions

Do I have to pay interest on my loans while I'm in school?

No. Federal subsidized loans have no interest accrual, so you owe nothing. For unsubsidized and private loans, payments are not required while you are in school, but interest still accrues. You can pay it if you choose, but you are not obligated to.

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

Accruing means interest is building up and being calculated. Capitalizing means that accrued interest is added to your principal balance. Once capitalized, you pay interest on that interest. Paying accrued interest before capitalization prevents this compounding effect.

If I don't pay interest while in school, how much will I owe when I graduate?

That depends on your loan type, the interest rate, and how long you are in school. Use the loan calculator on studentaid.gov to estimate. For a rough example, $10,000 in unsubsidized loans at 6.33% will accrue about $633 per year. After four years, you would owe approximately $12,532 when repayment begins.

Can I pay off accrued interest before it capitalizes?

Yes. You can pay the accrued interest anytime during your grace period, before your first payment is due. Contact your loan servicer to find out exactly how much has accrued and make a payment. Paying it before capitalization keeps your principal balance lower.

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

Yes. Parent PLUS loans accrue interest from the moment they are disbursed, regardless of whether the student is in school. Interest continues to accrue during the grace period. Parents can make interest payments while their child is in school to reduce capitalization.