Student Loan Calculator
Plan your student loan repayment with our Student Loan Calculator. Enter your total loan amount, interest rate, loan term, and repayment plan to see your monthly payment, total interest, and payoff date. Perfect for college graduates planning their budget, comparing repayment plans, evaluating refinancing options, or understanding the true cost of student loans. The calculator supports standard, graduated, and extended repayment plans. All calculations happen instantly in your browser with no data storage.
How it works: Enter your student loan amount, interest rate, loan term, and repayment plan to calculate your monthly payment and total interest. The calculator helps you plan for student loan repayment and compare different strategies.
What Is a Student Loan Calculator?
A student loan calculator computes your monthly payment, total interest paid, and total repayment amount for a given loan balance, interest rate, and repayment term. It helps you compare the long-run cost of different repayment plans — from the standard 10-year plan that minimizes interest to income-driven repayment plans that cap monthly payments at a percentage of your discretionary income.
Federal student loan rates are fixed at origination and set by Congress annually. Private student loan rates vary by lender and creditworthiness. This calculator works for both: enter your loan balance, rate, and term to see exactly what you owe over time.
Understanding your total repayment cost — not just the monthly payment — is essential for choosing between repayment plans. A lower monthly payment almost always means more total interest paid over a longer repayment period.
How to Use This Student Loan Calculator
- Enter your total loan balance. If you have multiple loans, enter them separately or combine balances with a weighted average rate.
- Enter the annual interest rate. Federal loan rates are shown on your loan servicer dashboard or at studentaid.gov.
- Enter the repayment term in years (10 for Standard, 25 for Extended, or your IDR plan's term).
- Review the monthly payment, total interest, and total repayment.
- Change the term to compare plans: shorter terms mean higher payments but less total interest.
Worked Example: $35,000 at 5.5%
Jamie graduates with $35,000 in federal student loans at a blended rate of 5.5%. Here's how each repayment plan compares:
| Plan | Term | Monthly Payment | Total Interest | Total Repaid |
|---|---|---|---|---|
| Standard | 10 years | $379 | $10,480 | $45,480 |
| Graduated | 10 years | $220–$655 | $13,100 | $48,100 |
| Extended Fixed | 25 years | $216 | $29,800 | $64,800 |
| SAVE (IDR est.) | 20–25 years | ~$180–$280 | Varies | Possible forgiveness |
The Standard plan costs $10,480 in interest. Extending to 25 years costs $29,800 — $19,320 more — just to lower the monthly payment by $163. For most borrowers who can afford the Standard payment, it's the better long-run choice.
Federal Repayment Plan Reference
| Plan | Term | Payment Structure | Forgiveness | Best for |
|---|---|---|---|---|
| Standard | 10 years | Fixed equal payments | None | Lowest total interest |
| Graduated | 10 years | Starts low, increases every 2yr | None | Entry-level income, expects raises |
| Extended | 25 years | Fixed or graduated | None | Large balance, need low payment |
| SAVE | 20–25 years | 5–10% discretionary income | Yes (after 20/25yr) | High debt-to-income ratio |
| PSLF | 10 years (IDR) | IDR-based payments | Yes (after 120 payments) | Government/nonprofit employees |
Key Concepts: Federal vs. Private Loans, IDR, and PSLF
Federal vs. private student loans — Federal loans offer fixed rates, income-driven repayment options, deferment, forbearance, and potential forgiveness. Private loans typically have no forgiveness options and fewer hardship protections. Exhaust federal options before taking private loans.
Income-Driven Repayment (IDR) — IDR plans (SAVE, PAYE, IBR, ICR) cap payments at 5–20% of your discretionary income. After 20–25 years of qualifying payments, the remaining balance is forgiven (though forgiven amounts may be taxable income under current law, with exceptions for PSLF).
PSLF (Public Service Loan Forgiveness) — Working full-time for a government or qualifying non-profit while making 120 qualifying IDR payments makes the remaining balance tax-free forgiven. This can eliminate hundreds of thousands of dollars in debt for high-balance borrowers in public service careers.
Refinancing — Private refinancing can lower your interest rate significantly (sometimes from 6–7% to 4–5%) but converts federal loans to private, permanently eliminating access to IDR, PSLF, deferment, and forgiveness programs. Only refinance federal loans if you're confident you won't need those protections.
Tips and Common Mistakes
- Choosing the extended plan to lower payments without calculating the total cost — Extending from 10 to 25 years often costs $15,000–$30,000 in extra interest on a $35,000 balance. Calculate total repayment before choosing a longer term.
- Refinancing federal loans before confirming PSLF ineligibility — Once you refinance federal loans to private, you permanently lose PSLF eligibility. If you work in public service or may in the future, do not refinance.
- Missing IDR recertification deadlines — IDR plans require annual income recertification. Missing the deadline can cause your payment to jump to the Standard plan amount. Set a calendar reminder 90 days before your anniversary date.
- Not making payments during grace periods when you can afford it — During the 6-month post-graduation grace period, interest accrues on unsubsidized loans. Even small payments during the grace period reduce the balance that capitalizes when repayment begins.
- Ignoring employer student loan benefits — Many employers now offer student loan repayment assistance (up to $5,250/year tax-free under current law). Check HR benefits before assuming you must fund repayment entirely yourself.
Frequently Asked Questions
How much is the average monthly student loan payment?
The average federal student loan borrower owes ~$37,000. On a 10-year Standard plan at 6.5%, that's roughly $420/month. Monthly payments vary widely — from under $200 on IDR to $800+ for high-balance borrowers on Standard plans.
What is the best repayment plan for student loans?
The Standard 10-year plan minimizes total interest. IDR (SAVE) minimizes monthly cash outflow, especially for borrowers targeting PSLF or with high debt-to-income ratios. The "best" plan depends on your income, career, and whether you qualify for forgiveness.
Should I pay off student loans early?
It depends on your interest rate. Federal loans at 5–7% are below the historical stock market return of 8–10%. But paying down debt is a guaranteed return at your loan's rate. If you're targeting PSLF, do not pay extra — minimum IDR payments maximize forgiveness. If not, extra principal payments on high-rate loans save meaningful interest.
What are current federal student loan interest rates?
Federal rates are set annually by Congress based on 10-year Treasury yields. For 2024–25: undergraduate loans: 6.53%, graduate unsubsidized: 8.08%, PLUS loans: 9.08%. Check studentaid.gov for the most current rates.
Can I deduct student loan interest?
Yes — up to $2,500/year in student loan interest is deductible for single filers earning under $75,000 (phase-out to $90,000) and joint filers under $155,000 (phase-out to $185,000). The deduction is above-the-line, meaning you don't need to itemize.
What happens if I can't afford my student loan payment?
Federal loan options: apply for an IDR plan (payments as low as $0 for very low incomes), request deferment (up to 3 years for economic hardship), or forbearance. Private loan options are much more limited — contact your lender immediately before missing payments.
Should I refinance my student loans?
Only refinance federal loans if you have stable income, strong credit (720+), don't work in public service, and won't need IDR or forgiveness. Private loans with high rates are better candidates for refinancing. Current refi rates for excellent credit run 4.5–6.5%.
What related tools should I use?
Use the business loan calculator if you're a graduate financing a business, or the simple interest calculator to understand interest cost basics.