Student Loan Payment Calculator

Enter the current principal balance, annual interest rate, and repayment term in years to see the monthly payment, total amount repaid, and total interest paid over the full term. It uses the conventional amortization formula and also handles zero-interest loans. The result is useful for planning and comparison, but it does not model fees, changing rates, income-driven repayment, deferment, forgiveness, capitalization events, or extra payments.

Turn loan terms into a practical monthly budget

A quoted balance and interest rate do not immediately tell you what the loan will demand from each paycheck. This calculator converts those terms into a standard fixed monthly payment, which makes the debt easier to place inside a real household budget. Enter the principal you currently owe, not the amount you originally borrowed, because prior payments or capitalized interest may have changed the balance. Supply the annual interest rate as a percentage: for example, enter 5.5 for a rate of 5.5%, rather than 0.055. Choose the contractual repayment term in whole years. The result includes the number of monthly payments so you can confirm the schedule being modeled. Compare the payment with rent, savings, insurance, and other obligations, and leave room for irregular expenses. This is an estimate of a fully amortizing schedule in which every payment arrives on time and the rate remains fixed. Your servicer's billed amount can differ because of rounding, payment dates, fees, benefits, or a different repayment plan.

Understand monthly payment, repayment, and interest

For a loan with interest, the calculator converts the annual percentage rate into a monthly rate and applies the standard amortization formula across the full number of payments. Each scheduled payment is level, but its composition changes: early payments generally contain more interest, while later payments direct more money toward principal. The displayed total repayment is the unrounded calculated monthly obligation multiplied across the schedule, then rounded to cents. Total interest is that repayment amount minus the starting balance. Using unrounded internal values avoids allowing a displayed two-decimal payment to create a larger accumulation error over many years. When the annual rate is zero, the calculation simply divides the balance equally among all months, because no interest accrues. The estimate assumes interest compounds monthly and does not attempt to produce a payment-by-payment amortization table. It also assumes no origination fee, late charge, deferment, forbearance, subsidy, capitalization, variable-rate adjustment, prepayment, or forgiveness. Those features can materially alter both timing and cost, so use official loan documents for binding figures.

Compare repayment terms without hiding the tradeoff

Run the calculator more than once to understand how term length changes the decision. A shorter term normally raises the required monthly payment but reduces the time during which interest can accrue, lowering total interest and total repayment. A longer term usually lowers the monthly burden while increasing lifetime cost. Looking at only one output can therefore be misleading: the smallest payment is not necessarily the least expensive plan, and the lowest total interest may not fit a sustainable budget. You can also test different rates when comparing refinancing offers, but remember that a refinance may replace federal protections with private-loan terms and may include conditions not represented here. For an existing loan, request the current payoff balance and verify whether the stated rate is fixed. Treat this result as a clean baseline for a conventional schedule, then compare it with the servicer's disclosure and any program-specific simulator. If you plan to pay extra, this calculator's standard schedule provides a useful reference point, but it does not predict the exact payoff date or savings from additional principal payments.