.calculator-wrapper-seo {
max-width: 800px;
margin: 0 auto;
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
color: #333;
line-height: 1.6;
}
.calc-container {
background: #f9f9f9;
border: 1px solid #e0e0e0;
border-radius: 8px;
padding: 25px;
margin-bottom: 40px;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.calc-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
}
@media (max-width: 600px) {
.calc-grid {
grid-template-columns: 1fr;
}
}
.input-group {
margin-bottom: 15px;
}
.input-group label {
display: block;
font-weight: 600;
margin-bottom: 5px;
font-size: 0.95rem;
color: #2c3e50;
}
.input-group input, .input-group select {
width: 100%;
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 1rem;
box-sizing: border-box;
}
.input-group input:focus {
border-color: #2980b9;
outline: none;
box-shadow: 0 0 5px rgba(41, 128, 185, 0.2);
}
.calc-btn {
background-color: #2980b9;
color: white;
border: none;
padding: 12px 25px;
font-size: 1.1rem;
font-weight: bold;
border-radius: 4px;
cursor: pointer;
width: 100%;
margin-top: 10px;
transition: background 0.2s;
}
.calc-btn:hover {
background-color: #21618c;
}
.results-section {
margin-top: 25px;
padding-top: 20px;
border-top: 2px solid #e0e0e0;
}
.result-row {
display: flex;
justify-content: space-between;
margin-bottom: 10px;
font-size: 1rem;
}
.result-row.total {
font-size: 1.4rem;
font-weight: 800;
color: #27ae60;
margin-top: 15px;
padding-top: 10px;
border-top: 1px dashed #ccc;
}
.error-msg {
color: #c0392b;
font-size: 0.9rem;
display: none;
margin-top: 10px;
}
.seo-content h2 {
color: #2c3e50;
margin-top: 40px;
font-size: 1.8rem;
}
.seo-content h3 {
color: #34495e;
margin-top: 25px;
font-size: 1.4rem;
}
.seo-content p {
margin-bottom: 15px;
font-size: 1.05rem;
}
.seo-content ul {
margin-bottom: 20px;
padding-left: 20px;
}
.seo-content li {
margin-bottom: 8px;
}
function calculateMortgage() {
// Get Input Values
var homePrice = parseFloat(document.getElementById("homePrice").value);
var downPayment = parseFloat(document.getElementById("downPayment").value);
var interestRate = parseFloat(document.getElementById("interestRate").value);
var loanTermYears = parseInt(document.getElementById("loanTerm").value);
var annualTax = parseFloat(document.getElementById("propertyTax").value);
var annualInsurance = parseFloat(document.getElementById("homeInsurance").value);
var monthlyHoa = parseFloat(document.getElementById("hoaFees").value);
var errorDiv = document.getElementById("errorDisplay");
var resultsArea = document.getElementById("resultsArea");
// Validation
if (isNaN(homePrice) || isNaN(downPayment) || isNaN(interestRate) ||
isNaN(annualTax) || isNaN(annualInsurance) || isNaN(monthlyHoa)) {
errorDiv.style.display = "block";
resultsArea.style.opacity = "0.5";
return;
}
if (homePrice <= 0 || downPayment < 0 || interestRate < 0) {
errorDiv.style.display = "block";
resultsArea.style.opacity = "0.5";
return;
}
errorDiv.style.display = "none";
resultsArea.style.opacity = "1";
// Core Calculations
var principal = homePrice – downPayment;
var numPayments = loanTermYears * 12;
var monthlyRate = (interestRate / 100) / 12;
// Mortgage Formula: M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1]
var monthlyPI = 0;
if (monthlyRate === 0) {
monthlyPI = principal / numPayments;
} else {
monthlyPI = principal * (monthlyRate * Math.pow(1 + monthlyRate, numPayments)) / (Math.pow(1 + monthlyRate, numPayments) – 1);
}
// Tax and Insurance
var monthlyTax = annualTax / 12;
var monthlyInsurance = annualInsurance / 12;
// Totals
var totalMonthly = monthlyPI + monthlyTax + monthlyInsurance + monthlyHoa;
var totalRepayment = monthlyPI * numPayments;
var totalInterest = totalRepayment – principal;
// Formatter
var formatter = new Intl.NumberFormat('en-US', {
style: 'currency',
currency: 'USD',
minimumFractionDigits: 2
});
// Update DOM
document.getElementById("resPrincipalInterest").innerText = formatter.format(monthlyPI);
document.getElementById("resTaxes").innerText = formatter.format(monthlyTax);
document.getElementById("resInsurance").innerText = formatter.format(monthlyInsurance);
document.getElementById("resHoa").innerText = formatter.format(monthlyHoa);
document.getElementById("resTotal").innerText = formatter.format(totalMonthly);
document.getElementById("resLoanAmount").innerText = formatter.format(principal);
document.getElementById("resTotalInterest").innerText = formatter.format(totalInterest);
}
// Initialize on load with default values
window.onload = function() {
calculateMortgage();
};
Advanced Mortgage PITI Calculator
30 Years
20 Years
15 Years
10 Years
Please enter valid positive numbers for all fields.
Principal & Interest:
$0.00
Property Taxes:
$0.00
Home Insurance:
$0.00
HOA Fees:
$0.00
Total Monthly Payment:
$0.00
Total Loan Amount:
$0.00
Total Interest Paid:
$0.00
Understanding Your Mortgage PITI Payment
Calculating your monthly mortgage payment involves more than just repaying the loan principal and interest. A comprehensive budget must include "PITI"—Principal, Interest, Taxes, and Insurance. Our Mortgage PITI Calculator breaks down these costs to provide a realistic view of your housing affordability.
Breakdown of Mortgage Components
When you take out a home loan, your monthly bill is typically split into four main categories:
- Principal: The portion of your payment that reduces the loan balance. In the early years of a standard 30-year mortgage, this amount is small but grows over time.
- Interest: The cost of borrowing money. This is calculated based on your remaining principal balance and your annual interest rate.
- Property Taxes: Fees paid to your local government, usually collected by the lender in an escrow account and paid annually or semi-annually on your behalf.
- Homeowners Insurance: Protection against hazards like fire or theft. Like taxes, this is often bundled into your monthly mortgage payment via escrow.
How Loan Terms Affect Your Payment
The duration of your loan significantly impacts your monthly obligations and total interest costs:
- 30-Year Fixed: Offers lower monthly payments by spreading the principal repayment over a longer period, but results in higher total interest paid.
- 15-Year Fixed: Requires higher monthly payments but saves tens of thousands of dollars in interest and builds equity much faster.
What About HOA Fees?
If you are buying a condo or a home in a planned community, you may owe Homeowners Association (HOA) fees. While these are usually paid directly to the association and not the lender, they are a critical part of your monthly housing expense and affect your debt-to-income ratio during the approval process. This calculator includes a field for HOA fees to ensure your total budget is accurate.
Tips for Lowering Your Mortgage Payment
If the calculated total is higher than your budget allows, consider the following strategies:
- Increase your down payment: This lowers the principal loan amount and may eliminate the need for Private Mortgage Insurance (PMI).
- Improve your credit score: A higher score can qualify you for a lower interest rate, significantly reducing the interest portion of your PITI.
- Shop for cheaper insurance: Homeowners insurance rates vary by provider. Comparing quotes can save you $20-$50 per month.