Formula Used
Monthly payment = P × [r(1 + r)^n] ÷ [(1 + r)^n − 1]
P = principal, r = periodic interest rate, n = number of payments.
How the formula is applied
The calculation links Loan Amount ($), Annual Interest Rate (%) and Loan Term to monthly payment. The repayment result depends on whether you solve for payment or duration. A larger recurring payment can shorten the schedule only if it exceeds accrued interest.