Yes, most student loans charge interest, and it begins accruing immediately after the loan is disbursed
Interest is the cost of borrowing money. When you take out a student loan, the lender charges you a percentage of the loan balance each year. That percentage is your interest rate. The interest you owe gets added to your principal balance — the original amount you borrowed — and you pay both back over time.
Federal student loans and private student loans both charge interest, but the rates and rules differ significantly. Federal loans have fixed rates set by Congress, while private loans have rates that vary by lender and your credit history. Understanding which type of loan you have and when interest starts accumulating will affect how much you ultimately repay.
Key Takeaways
- Federal loans have fixed interest rates that Congress sets; private loans have variable or fixed rates that depend on your credit score and the lender.
- Interest on unsubsidized federal loans starts accruing the day the loan is disbursed, even while you are still in school.
- Interest on subsidized federal loans does not accrue while you are enrolled at least half-time, during your grace period, or during deferment.
- Unpaid interest capitalizes — it gets added to your principal — which means you pay interest on interest if you do not pay it down.
- Your monthly payment covers both principal and interest, but early in repayment most of your payment goes toward interest.
How interest accrues on federal student loans
Federal student loans come in two main types: subsidized and unsubsidized. The difference is who pays the interest while you are in school.
With unsubsidized loans, interest accrues from the moment the loan is disbursed. You do not have to make payments while in school, but the interest keeps building. If you do not pay that interest while you are enrolled, it capitalizes — meaning it gets added to your principal balance. After that, you owe interest on the interest, which increases the total amount you repay.
With subsidized loans, the federal government pays the interest while you are enrolled at least half-time, during your six-month grace period after graduation, and during certain deferment periods. Interest does not accrue during these times. This is the main advantage of subsidized loans: you borrow less total money because the government covers the interest cost upfront.
Federal interest rates are fixed for the life of the loan. For loans disbursed in the 2024–2025 academic year, the rate varies by loan type — Direct Subsidized Loans, Direct Unsubsidized Loans, and PLUS Loans each have different rates. These rates are set by Congress and do not change after your loan is issued.
How interest accrues on private student loans
Private student loans are issued by banks, credit unions, and other lenders, not by the federal government. Interest rates on private loans depend on your credit score, income, and the lender's policies. Rates can be fixed (staying the same for the life of the loan) or variable (changing based on market conditions).
Interest on private loans typically begins accruing immediately after disbursement. Unlike federal subsidized loans, there is no government subsidy to cover interest while you are in school. Some private lenders offer in-school deferment, meaning you do not have to make payments, but interest still accrues and capitalizes if you do not pay it.
Private loan terms vary widely. Before borrowing, check whether your lender offers a grace period after graduation, whether interest accrues during deferment, and what happens if you miss a payment. These details affect your total repayment cost.
What capitalization means and why it matters
Capitalization is when unpaid interest gets added to your principal balance. After capitalization, you owe interest on that interest, which increases the total amount you repay.
Example: You borrow $10,000 in unsubsidized federal loans at 6% interest. While you are in school for four years, $2,400 in interest accrues. If you do not pay that interest before repayment begins, it capitalizes, and your new principal is $12,400. Your monthly payment now covers interest on $12,400, not $10,000.
Capitalization happens automatically on federal loans at specific times: when you enter repayment, when you exit deferment or forbearance, and when you change repayment plans. On private loans, capitalization rules depend on your lender's terms. You can avoid or reduce capitalization by paying interest while you are in school, even if you are not required to make full payments.
How your monthly payment splits between principal and interest
When you make a monthly student loan payment, that money goes toward both principal and interest. Early in repayment, most of your payment covers interest. As you pay down the principal, more of each payment goes toward reducing what you actually borrowed.
This is why the order of repayment matters. On a 10-year standard repayment plan for a $30,000 loan at 6% interest, your first payment might be roughly $333, with about $150 going to interest and $183 to principal. By year nine, the split reverses — most of your payment reduces principal because less interest accrues on the smaller balance.
If you make extra payments toward principal, you reduce the total interest you pay over the life of the loan. Paying even $50 extra per month can save thousands in interest on a large loan.
Interest rates for federal loans by type
Federal student loan interest rates are fixed by Congress and vary by loan type. Rates are set for each academic year and apply to all loans disbursed during that year.
| Loan Type | Who It Is For | Interest Rate (2024–2025) |
|---|---|---|
| Direct Subsidized Loan | Undergraduate students with demonstrated financial need | 5.50% |
| Direct Unsubsidized Loan | Undergraduate and graduate students; no need requirement | 5.50% (undergrad), 7.10% (grad) |
| Direct PLUS Loan | Graduate students and parents of undergraduates | 8.15% |
These rates apply only to federal loans. Private loan rates vary by lender and borrower credit profile and are typically higher than federal rates.
How to minimize the interest you pay
Pay interest while you are in school if you can. Even small payments on unsubsidized loans prevent capitalization and reduce your total repayment cost. If you cannot pay the full interest, paying something is better than nothing.
Choose a repayment plan that matches your income and goals. The standard 10-year plan pays off the loan fastest and costs the least in total interest. Income-driven plans stretch payments over 20 or 25 years, lowering your monthly payment but increasing total interest paid. Weigh your monthly budget against your long-term cost.
Make extra payments toward principal when possible. Even $25 extra per month reduces the balance faster and saves interest. Some borrowers make a lump-sum payment when they receive a tax refund or bonus, which can cut years off repayment.
Refinance private loans if your credit score improves and rates drop. Refinancing a private loan with a lower rate reduces the interest you pay going forward. Do not refinance federal loans into private loans unless you are certain you do not need federal protections like income-driven repayment or Public Service Loan Forgiveness.
Frequently Asked Questions
Does interest accrue on student loans while I am in school?
Interest accrues on unsubsidized federal loans and private loans from the day they are disbursed, even while you are enrolled. Interest does not accrue on subsidized federal loans while you are enrolled at least half-time. After graduation, interest accrues on all loans during the grace period unless you are in deferment or forbearance.
What is the difference between fixed and variable interest rates?
A fixed rate stays the same for the entire life of the loan. A variable rate changes based on market conditions, usually tied to an index like the prime rate. Federal student loans have fixed rates. Some private loans offer variable rates, which start lower but can increase significantly over time.
Can I pay just the interest while I am in school?
Yes. Paying interest on unsubsidized loans while in school prevents capitalization and reduces your total repayment cost. You are not required to make payments, but paying interest voluntarily is a smart financial move if you can afford it. Contact your loan servicer to set up payments.
What happens if I do not pay interest before repayment starts?
Unpaid interest capitalizes — it gets added to your principal balance. You then owe interest on the higher balance, increasing the total amount you repay. This happens automatically when you enter repayment on federal loans and when you exit deferment or forbearance.
Does making extra payments reduce the interest I pay?
Yes. Extra payments go toward principal, which reduces the balance that interest accrues on. Paying extra shortens your repayment timeline and saves thousands in interest over the life of the loan. Specify that extra payments go toward principal, not future payments.