Student loan interest is the extra money you pay to borrow funds for college. The amount you pay depends on your loan type, interest rate, and repayment plan. On average, federal undergraduate loans have fixed rates around 5-7%, while private loans can range from 4% to 15% or more.
How interest rates are determined
Interest rates for federal student loans are set by Congress each year and are fixed for the life of the loan. Private lenders set their own rates based on your credit score and other factors. Your rate can be fixed (stays the same) or variable (changes over time).
Federal vs. private loan rates
Federal loans offer predictable fixed rates and borrower protections like income-driven repayment. Private loans may have lower or higher rates depending on your creditworthiness. Always compare offers before choosing a private loan.
| Loan Type | Typical Rate (2025-2026) | Rate Type |
|---|---|---|
| Federal Direct Subsidized/Unsubsidized (Undergrad) | 5.50% | Fixed |
| Federal Direct Unsubsidized (Graduate) | 7.05% | Fixed |
| Federal PLUS Loans | 8.05% | Fixed |
| Private Student Loans | 4% – 15% | Fixed or Variable |
How interest accrues and compounds
Interest on student loans typically accrues daily. The daily interest is calculated by dividing your annual rate by 365 and multiplying by your current balance. For unsubsidized loans, interest starts accruing as soon as the loan is disbursed.
When interest is not paid as it accrues, it may be capitalized—added to your principal balance. This means you pay interest on interest, increasing your total cost.
Simple vs. compound interest
Most federal student loans use simple interest, meaning interest is based only on the original principal. However, capitalization can turn it into compound interest. Private loans may compound more frequently, so read the terms carefully.
Estimating your total interest cost
To estimate total interest, multiply your loan amount by your rate and repayment term. For example, a $30,000 loan at 5.5% over 10 years will cost about $9,000 in interest. Use an online calculator or your loan servicer’s tool for accurate numbers.
- Make payments during school or grace periods to reduce principal.
- Pay more than the minimum each month to lower interest accrual.
- Consider refinancing if you have good credit and stable income.
- Set up autopay to get a 0.25% rate reduction with many servicers.
Ways to lower your interest costs
You can reduce your interest by choosing a shorter repayment term, like 5 years instead of 10. You can also make extra payments toward the principal. Even small additional payments can save hundreds of dollars over time.
For federal loans, income-driven repayment plans may lower monthly payments but increase total interest. Public Service Loan Forgiveness can forgive remaining balance after 120 qualifying payments, but only for eligible borrowers.
When to consider refinancing
Refinancing combines your loans into one new loan with a private lender. This can lower your rate if your credit has improved. However, you lose federal benefits like forbearance and forgiveness, so weigh the pros and cons.
Actionable tips for borrowers
Start by knowing your loan types and rates. Log into your servicer’s portal to see your balance and interest. Then, create a budget that includes a monthly payment above the minimum.
If you have multiple loans, pay off the highest-rate loan first while making minimum payments on others. This “avalanche” method saves the most interest. Alternatively, the “snowball” method pays off smallest balances first for motivation.
Summary
Interest on student loans varies by loan type and lender, but federal rates are typically 5-8% and private rates range widely. To minimize interest, pay early, pay extra, and consider refinancing only if you understand the trade-offs. Always read your loan terms and ask your servicer about repayment options.
Frequently Asked Questions
How much interest do I pay on a $30,000 student loan?
If you have a 10-year federal loan at 5.5%, you will pay about $9,000 in interest over the life of the loan, making your total repayment around $39,000.
Do student loans accrue interest while in school?
Subsidized federal loans do not accrue interest while you are in school at least half-time, but unsubsidized and private loans do accrue interest from the day they are disbursed.
Can I lower my student loan interest rate?
Yes, you can lower your rate by enrolling in autopay for a 0.25% reduction, or by refinancing to a lower rate if your credit score has improved since you took out the loan.
What is the average interest rate for student loans in 2026?
For the 2025-2026 school year, federal undergraduate loans have a fixed rate of 5.50%, graduate loans at 7.05%, and PLUS loans at 8.05%. Private loan rates vary by lender and credit.
Is it better to pay off student loans early to save interest?
Yes, paying off your loans early reduces the total interest you pay because interest accrues on the remaining balance. Make extra payments toward the principal whenever possible.
