Student Loan Payment Calculator
Estimate monthly student loan payments, total interest, and payoff time based on your loan amount, rate, and term.
View Amortization Schedule
What This Calculator Does
This student loan payment calculator estimates your monthly payment based on three inputs: your total loan balance, the annual interest rate, and the repayment term length. It also calculates the total interest you will pay over the life of the loan and the date you will be debt-free if you make standard payments.
The calculator assumes a fixed interest rate and a standard amortizing repayment plan, where each payment covers the interest due plus a portion of the principal. This is the most common structure for federal and private student loans.
How to Use the Calculator
- Enter your total loan amount. This is the sum of all student loans you want to include in the calculation.
- Enter your annual interest rate. Use the weighted average rate if you have multiple loans, or enter the rate for a single loan.
- Enter the repayment term in years. Standard terms are 10 years for federal loans, but private loans may offer 5, 10, 15, or 20 years.
The calculator updates instantly. Adjust any input to see how changes affect your monthly payment and total interest.
Understanding Your Results
The calculator displays three key figures:
- Monthly Payment: The fixed amount due each month for the entire repayment term.
- Total Interest Paid: The cumulative interest cost over the full loan term.
- Payoff Date: The estimated month and year your loan will be fully repaid.
These results assume you make every payment on time and do not make extra payments, refinance, or change your repayment plan.
Example Calculation
Suppose you have $35,000 in student loans at a 5.5% annual interest rate with a 10-year repayment term. The calculator estimates a monthly payment of approximately $380. Over 10 years, you would pay about $10,600 in total interest, with a payoff date 10 years from now.
If you extended the term to 20 years, the monthly payment would drop to roughly $240, but total interest would increase to about $22,800. This trade-off between monthly affordability and total cost is a key consideration when choosing a repayment plan.
Common Mistakes to Avoid
- Entering the monthly interest rate instead of the annual rate. Always use the annual percentage rate (APR) as shown on your loan documents.
- Forgetting to include all loans. If you have multiple loans, add up the balances and use a weighted average interest rate for a combined estimate.
- Assuming the result applies to income-driven repayment plans. This calculator uses standard amortization. Income-driven plans calculate payments based on your income, not just the loan balance and rate.
Limitations
This calculator provides estimates only. Actual payments may differ due to:
- Variable interest rates (common with private loans)
- Fees or capitalization of interest
- Changes in repayment plan or deferment/forbearance periods
- Extra payments or early payoff
For precise figures, review your loan servicer's statements or use their official repayment calculator.
Practical Use Cases
- Comparing repayment terms: See how a shorter term increases monthly payments but reduces total interest.
- Budgeting for new graduates: Estimate your monthly obligation before entering repayment.
- Evaluating refinancing options: Compare your current payment and interest cost against a potential new loan with a lower rate or different term.
Frequently Asked Questions
Does this calculator work for federal and private student loans?
Yes. The calculator works for any fixed-rate amortizing loan. Federal loans with standard repayment plans and most fixed-rate private loans follow this structure. It does not apply to income-driven repayment plans or variable-rate loans.
What is a weighted average interest rate?
If you have multiple loans at different rates, the weighted average rate gives a single rate that reflects the proportion of each loan balance. To calculate it, multiply each loan balance by its rate, sum those values, then divide by the total loan balance.
Can I use this for Parent PLUS loans?
Yes. Parent PLUS loans use standard amortization and can be calculated the same way. Note that Parent PLUS loans may have higher interest rates and different repayment term options.
Why does my actual payment differ from the calculator?
Differences can occur due to rounding, loan fees, interest capitalization, or if your loan uses a different repayment structure. Always verify with your loan servicer for exact figures.