What a student loan interest rate actually is

A student loan interest rate is the percentage of your loan balance that the lender charges you each year for borrowing money. If you borrow $10,000 at a 5% interest rate, you owe $500 in interest that year — on top of the original $10,000. The rate determines how much extra you pay back beyond what you borrowed.

Interest accrues, meaning it builds up over time. On federal loans, interest often gets added to your balance before you start repaying, so you end up owing interest on top of interest. On private loans, interest may be charged while you are still in school. The higher the rate, the more you pay in total by the time the loan is gone.

Student loan rates are set differently depending on the type of loan. Federal student loans have rates set by Congress and are the same for all borrowers in a given year. Private student loans have rates that vary based on your credit score, income, and the lender's policies.

Key Takeaways

  • Federal student loan rates are fixed by Congress each year and are the same for every borrower; current rates range from roughly 5% to 8% depending on the loan type and year borrowed.
  • Private student loan rates vary by lender and borrower credit score, and can be fixed or variable, meaning they may change over time.
  • Interest on federal loans often accrues while you are in school and gets added to your balance, increasing the total you owe.
  • A higher interest rate means you pay significantly more over the life of the loan, so comparing rates matters when choosing between private lenders.

Federal student loan rates versus private rates

Federal student loans issued through the U.S. Department of Education have rates set by law. Congress decides the rate each year, and that rate applies to all borrowers taking out loans that year. For example, all Direct Unsubsidized Loans issued in the 2024–2025 school year have the same rate, regardless of your credit score or income. Federal rates do not change after you borrow — they are fixed for the life of the loan.

Private student loans work differently. Banks, credit unions, and online lenders each set their own rates based on how risky they think the loan is. Your credit score, income, and whether you have a cosigner all affect the rate you receive. Private rates can be fixed (staying the same for the entire loan) or variable (changing based on market conditions). A variable rate might start low but increase over time, making your monthly payment unpredictable.

Federal rates are typically lower than private rates because the federal government does not need to make a profit. Private lenders charge higher rates to cover their costs and earn money. If you have poor credit, a private lender may charge you 10% or more, while a federal loan might be 6% to 8%.

How interest accrues on different loan types

Subsidized federal loans do not accrue interest while you are in school, during your grace period after graduation, or during deferment. The government pays the interest for you during these times. Once you start repaying, interest begins to build on your balance.

Unsubsidized federal loans accrue interest from the moment the loan is disbursed, even while you are in school. If you do not pay the interest as it builds, it gets capitalized — added to your loan balance. This means you end up owing interest on the interest, which increases the total amount you repay.

Private loans usually accrue interest while you are in school. Some lenders let you make interest-only payments during school to prevent capitalization; others add all accrued interest to your balance when repayment begins. Read your loan agreement to understand when your lender starts charging interest and what happens if you do not pay it immediately.

What the interest rate means for your monthly payment

The interest rate directly affects how much you pay each month. On a $20,000 loan repaid over 10 years, a 4% rate costs you roughly $1,840 in total interest. The same loan at 7% costs roughly $3,900 in total interest — more than $2,000 extra. That difference comes straight out of your pocket.

Your monthly payment is calculated using the loan amount, the interest rate, and the repayment term (how many years you have to repay). A higher rate means a higher monthly payment, or a longer repayment period if you want to keep the payment low. Some federal repayment plans cap your monthly payment at a percentage of your income, but interest still accrues at the full rate — you just pay it over a longer time.

If you have multiple loans with different rates, paying extra toward the highest-rate loans first saves you the most money in interest over time. This strategy is called the avalanche method and is one way to reduce the total cost of your debt.

Fixed rates versus variable rates

A fixed interest rate stays the same for the entire life of the loan. You know exactly what your rate is and what you will pay. Federal student loans always have fixed rates. Most private loans offer fixed-rate options as well. Fixed rates are predictable and protect you if market interest rates rise.

A variable interest rate changes based on a market index, usually the prime rate or LIBOR. Your rate might start at 5% but increase to 6% or 7% as the index rises. Variable rates are typically lower at the start, which makes them attractive, but they can become much higher over time. If you choose a variable-rate private loan, your monthly payment could increase significantly after a few years.

For most borrowers, a fixed rate is safer because you avoid the risk of your payment jumping unexpectedly. Variable rates make sense only if you plan to repay the loan quickly, before rates have time to rise substantially.

How to find out your interest rate

For federal loans, you can find your rate on your loan documents or by logging into studentaid.gov, the official federal student aid website. Your loan servicer (the company that collects your payments) also provides your rate on your billing statements and online account.

For private loans, your lender sends you a disclosure document before you sign the loan agreement. This document lists your interest rate, whether it is fixed or variable, and when interest begins to accrue. Keep this document — you will need it to understand your loan terms and to compare rates if you are considering refinancing.

If you have already borrowed and do not remember your rate, contact your loan servicer directly. They can tell you the exact rate on each of your loans and explain how interest is accruing.

Frequently Asked Questions

Can I change my interest rate after I borrow?

No, your interest rate is locked in when you take out the loan and does not change for federal loans. For private loans, you cannot change your existing rate, but you can refinance (take out a new loan to pay off the old one) if you may have access to for a lower rate. Refinancing resets your loan term and may change your total interest cost.

Why do federal loan rates change every year?

Congress sets federal student loan rates each year based on the 10-year Treasury note rate plus a fixed percentage. The Treasury rate fluctuates with the economy, so federal rates go up and down. Your rate is determined by the year you borrow, not by your credit score or income.

What is the difference between APR and interest rate on student loans?

The interest rate is the percentage charged on your loan balance. APR (annual percentage rate) includes the interest rate plus other costs like origination fees. For federal loans, the interest rate and APR are usually the same because federal loans have minimal fees. For private loans, APR is typically slightly higher than the stated interest rate.

Does a higher interest rate mean I pay more per month?

Yes, generally. A higher rate increases your monthly payment if your loan term stays the same. However, some federal repayment plans base your payment on your income rather than your loan balance, so a higher rate might not change your monthly payment — but you will pay interest for a longer time.

Can I pay off interest before it capitalizes on an unsubsidized loan?

Yes. While you are in school or during your grace period, you can make voluntary payments toward the accrued interest on an unsubsidized loan. This prevents the interest from being added to your balance and saves you money in the long run. Contact your loan servicer to arrange these payments.