Student Loan Payment Calculator
Plug in your balance, rate, and term to estimate a standard monthly payment, total interest, and an approximate payoff date. Add an extra monthly payment to see the payoff speedup.
Show a simple payoff summary
What this student loan payment calculator tells you
This calculator estimates a standard fixed-rate monthly student loan payment and then projects how much interest you’d pay over time. It’s meant for quick planning: “If my balance is $28,000 at 5.75% for 10 years, what’s my monthly payment?” and “What happens if I pay an extra $50 each month?”
Quick suggestion: run 2-3 scenarios, baseline, +$25 extra, +$100 extra, so you can see whether the speedup is worth the cash flow.
How the monthly payment is calculated (in plain English)
For a fixed-rate loan with a set term, the payment is based on standard amortization math. Each month, the lender computes interest on your remaining balance, and the rest of your payment goes toward principal. Early on, interest is a bigger slice because your balance is bigger. Later, more of your payment goes to principal.
If your interest rate is 0%, the math is simple: balance ÷ months. With a positive rate, the payment is the amount that fully pays the loan off by the end of the term.
Extra payments: the simplest way to change the outcome
An extra payment works because it reduces your balance faster. Less balance means less interest accrues in future months. Even a small recurring extra amount can shorten payoff time and reduce total interest. This calculator shows three extra-payment outputs: the payoff time, the total interest with extra, and the interest you save.
One practical way to use this: match your extra payment to something predictable, like a subscription you canceled, or a fixed “raise” amount. If the extra payment makes your budget tight, you can set it to $0 and use this calculator as a baseline.
What to enter (and common mistakes)
Balance is what you currently owe (principal). If you have multiple loans, you can run the calculator for each loan separately. Interest rate should be the annual rate stated by the servicer (APR-ish). Enter 5.75 for 5.75%. Term is the repayment length in years. If you’re on an income-driven plan, your “term” might not be a single fixed number, use this tool as a rough baseline.
Common mistakes: mixing up rate per month vs per year, entering the original loan amount instead of the current balance, and forgetting that some real-world plans have fees, capitalization rules, or interest subsidies. If your servicer’s quoted payment differs slightly, rounding and schedule timing are usually the reason.
Related calculators you may want next
Student loans rarely live alone in a budget. After you get a baseline payment here, you can: (1) build a full payoff plan with our Debt Payoff Calculator, (2) sanity-check the underlying payment math with the Loan Amortization Calculator, and (3) compare offers or consolidation options using the Loan APR Calculator. You can also browse all calculators if you’re exploring multiple scenarios.
Important notes (what this tool includes and excludes)
This is a straightforward amortization estimate for a single loan. It assumes the same monthly payment every month and that interest accrues evenly. It does not model interest subsidies, capitalization events, deferment/forbearance, variable rates, forgiveness timelines, or servicer-specific rounding. Use this calculator for planning and comparison, then confirm details with your loan servicer before making decisions.
FAQ
Is this calculator only for federal student loans?
No. The math is the same for any fixed-rate installment loan, including private student loans. Enter your balance, rate, and term to get an estimate.
Why is my servicer’s payment slightly different?
Small differences usually come from rounding, payment timing, or how the servicer applies interest accrual between due dates. This tool is a planning estimate, not a billing system.
What does “total interest” mean here?
It’s the sum of the interest portions across all monthly payments until the loan reaches $0 (based on the assumptions you entered). It helps you compare scenarios like paying extra each month.
How does an extra payment reduce interest?
Extra payments reduce principal faster. Because interest is calculated from the remaining balance, a lower balance means less interest accrues in future months.
Should I pay extra on the highest-rate loan first?
Often, yes: paying extra on the highest-rate balance typically minimizes total interest (the “avalanche” approach). If motivation matters more, some people prefer the “snowball” method. Our Debt Payoff Calculator can compare both.