Mortgage Extra Repayments Calculator
function calculateExtraRepayments(){
const loanAmount = parseFloat(document.getElementById(“loanAmount”).value);
const interestRate = parseFloat(document.getElementById(“interestRate”).value) / 100;
const loanTerm = parseFloat(document.getElementById(“loanTerm”).value) * 12;
const extraRepayments = parseFloat(document.getElementById(“extraRepayments”).value);
const repaymentFrequency = parseFloat(document.getElementById(“repaymentFrequency”).value);
if (isNaN(loanAmount) || isNaN(interestRate) || isNaN(loanTerm) || isNaN(extraRepayments) || isNaN(repaymentFrequency) || loanAmount <= 0 || interestRate <= 0 || loanTerm 0) {
const interestPayment = remainingLoan * monthlyRate;
const principalPayment = monthlyPayment – interestPayment;
remainingLoan -= principalPayment + extraRepayments;
if (remainingLoan el.value = “”);
}
