Payment Calculator
Last updated: November 5, 2026
Estimate a fixed monthly loan payment, total repayment and total interest.
Estimated monthly payment
—
- Total of payments: —
- Total interest: —
- First-month interest: —
On this page
Quick summary: Estimate a fixed monthly loan payment, total repayment and total interest.
Read the complete guide
Updated reference sections in this guide are in English.
What this calculator estimates
Estimate a fixed monthly loan payment, total repayment and total interest.
How to use it
Enter Amount financed ($); Annual interest rate (%); Number of monthly payments. Select Calculate to update the results.
How the calculation works
The monthly payment uses the standard amortizing-loan formula with a fixed monthly interest rate and fixed number of payments.
Worked example: starting scenario
| Amount financed ($) | 25000 |
|---|---|
| Annual interest rate (%) | 7 |
| Number of monthly payments | 60 |
| Estimated monthly payment | $495.03 |
|---|---|
| Total of payments | $29,701.80 |
| Total interest | $4,701.80 |
| First-month interest | $145.83 |
Important limitations
Fees, taxes, insurance, variable rates, irregular payment dates and lender-specific rounding are not included.
Principal, interest and the first payment
The payment amortizes the entered balance over the entered whole months at an unchanged nominal annual rate divided by 12. First-month interest is principal × annual percentage / 1200; the rest of the payment reduces principal. At zero interest, $1,200 over 12 months costs $100 per month. Fees, insurance, taxes and changing rates are outside this form.