.mortgage-calculator-wrapper {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
color: #333;
line-height: 1.6;
}
.calc-header {
text-align: center;
margin-bottom: 30px;
}
.calc-header h2 {
color: #2c3e50;
margin-bottom: 10px;
font-size: 2.2rem;
}
.calc-container {
background: #f8f9fa;
padding: 30px;
border-radius: 12px;
box-shadow: 0 4px 15px rgba(0,0,0,0.1);
margin-bottom: 40px;
}
.input-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
}
@media (max-width: 600px) {
.input-grid {
grid-template-columns: 1fr;
}
}
.input-group {
margin-bottom: 15px;
}
.input-group label {
display: block;
margin-bottom: 5px;
font-weight: 600;
font-size: 0.9rem;
color: #555;
}
.input-group input {
width: 100%;
padding: 12px;
border: 1px solid #ddd;
border-radius: 6px;
font-size: 1rem;
box-sizing: border-box; /* Crucial for padding */
}
.input-group input:focus {
border-color: #3498db;
outline: none;
box-shadow: 0 0 5px rgba(52,152,219,0.3);
}
.btn-calc {
width: 100%;
background: #27ae60;
color: white;
border: none;
padding: 15px;
font-size: 1.1rem;
font-weight: bold;
border-radius: 6px;
cursor: pointer;
transition: background 0.3s;
margin-top: 10px;
}
.btn-calc:hover {
background: #219150;
}
.results-section {
background: #fff;
margin-top: 30px;
padding: 25px;
border-radius: 8px;
border: 1px solid #eee;
display: none; /* Hidden by default */
}
.total-payment {
text-align: center;
border-bottom: 2px solid #f1f1f1;
padding-bottom: 20px;
margin-bottom: 20px;
}
.total-payment h3 {
margin: 0;
color: #7f8c8d;
font-size: 1.1rem;
text-transform: uppercase;
letter-spacing: 1px;
}
.big-number {
font-size: 3rem;
font-weight: 800;
color: #2c3e50;
margin: 10px 0;
}
.breakdown-item {
display: flex;
justify-content: space-between;
margin-bottom: 10px;
font-size: 1rem;
}
.breakdown-label {
color: #666;
}
.breakdown-value {
font-weight: bold;
color: #333;
}
.seo-content {
margin-top: 50px;
}
.seo-content h3 {
color: #2c3e50;
margin-top: 30px;
}
.seo-content p {
margin-bottom: 15px;
color: #444;
}
.error-msg {
color: #e74c3c;
text-align: center;
margin-top: 10px;
display: none;
}
Understanding Your Mortgage Payment
Purchasing a home is one of the most significant financial decisions you will make. While the listing price of a home gives you a baseline, the actual monthly cost of ownership involves several components. This Mortgage Payment Calculator helps you visualize the true cost, known as PITI (Principal, Interest, Taxes, and Insurance).
Key Components of a Mortgage
Principal: This is the money you borrowed to buy the home. A portion of your monthly payment goes toward reducing this balance. In the early years of a standard 30-year fixed loan, this portion is small but grows over time.
Interest: This is the fee the lender charges for loaning you the money. Interest rates significantly impact your monthly payment. For example, a 1% difference in interest rate can change your monthly payment by hundreds of dollars and the total cost of the loan by tens of thousands.
Property Taxes: Local governments assess taxes on real estate to fund public services like schools and roads. This calculator estimates the monthly portion of your annual tax bill, which is often held in an escrow account by your lender.
Homeowners Insurance: Lenders require you to insure the property against hazards like fire or theft. Like taxes, the annual premium is usually divided by 12 and added to your monthly mortgage payment.
How Down Payments Affect Your Loan
Putting more money down upfront reduces the loan principal, which lowers your monthly principal and interest payment. Additionally, a down payment of 20% or more typically allows you to avoid Private Mortgage Insurance (PMI), a separate cost that protects the lender if you default.
Using This Calculator for Budgeting
To use this tool effectively, input the current asking price of the home, your planned down payment, and the current market interest rate. Don't forget to include realistic estimates for property taxes and insurance, as these can add 20-30% to your monthly obligation. Adjusting the "Loan Term" allows you to compare the monthly affordability of a 15-year mortgage versus a 30-year mortgage.
function calculateMortgage() {
// Get Input Elements
var priceInput = document.getElementById('mcHomePrice');
var downInput = document.getElementById('mcDownPayment');
var rateInput = document.getElementById('mcInterestRate');
var termInput = document.getElementById('mcLoanTerm');
var taxInput = document.getElementById('mcPropertyTax');
var insuranceInput = document.getElementById('mcHomeInsurance');
// Parse Values
var price = parseFloat(priceInput.value);
var down = parseFloat(downInput.value);
var rate = parseFloat(rateInput.value);
var term = parseFloat(termInput.value);
var tax = parseFloat(taxInput.value);
var insurance = parseFloat(insuranceInput.value);
// Validation: Ensure all inputs are numbers and non-negative
if (isNaN(price) || isNaN(down) || isNaN(rate) || isNaN(term) || isNaN(tax) || isNaN(insurance) ||
price < 0 || down < 0 || rate < 0 || term <= 0 || tax < 0 || insurance price)
if (principal < 0) {
monthlyPI = 0;
totalMonthly = monthlyTax + monthlyInsurance;
}
// Update HTML Results with Formatting
var formatter = new Intl.NumberFormat('en-US', {
style: 'currency',
currency: 'USD',
minimumFractionDigits: 2
});
document.getElementById('mcPrincipalInterest').textContent = formatter.format(monthlyPI);
document.getElementById('mcMonthlyTax').textContent = formatter.format(monthlyTax);
document.getElementById('mcMonthlyInsurance').textContent = formatter.format(monthlyInsurance);
document.getElementById('mcTotalPayment').textContent = formatter.format(totalMonthly);
// Show Results Container
document.getElementById('mcResults').style.display = 'block';
}