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Mortgage Payment Calculator body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; line-height: 1.6; color: #333; margin: 0; padding: 20px; background-color: #f4f7f6; } .container { max-width: 1000px; margin: 0 auto; background: #fff; padding: 40px; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); } h1 { text-align: center; color: #2c3e50; margin-bottom: 30px; } .calculator-wrapper { display: flex; flex-wrap: wrap; gap: 30px; margin-bottom: 50px; border: 1px solid #e1e1e1; padding: 20px; border-radius: 8px; background-color: #fdfdfd; } .calc-inputs { flex: 1 1 400px; } .calc-results { flex: 1 1 300px; background-color: #2c3e50; color: white; padding: 25px; border-radius: 8px; display: flex; flex-direction: column; justify-content: center; } .input-group { margin-bottom: 15px; } .input-group label { display: block; margin-bottom: 5px; font-weight: 600; font-size: 0.9rem; } .input-group input, .input-group select { width: 100%; padding: 10px; border: 1px solid #ccc; border-radius: 4px; font-size: 1rem; box-sizing: border-box; } .row { display: flex; gap: 15px; } .row .input-group { flex: 1; } button.calc-btn { width: 100%; padding: 15px; background-color: #27ae60; color: white; border: none; border-radius: 4px; font-size: 1.1rem; font-weight: bold; cursor: pointer; transition: background 0.3s; margin-top: 10px; } button.calc-btn:hover { background-color: #219150; } .result-item { margin-bottom: 20px; border-bottom: 1px solid rgba(255,255,255,0.2); padding-bottom: 10px; } .result-item:last-child { border-bottom: none; } .result-label { font-size: 0.9rem; opacity: 0.9; display: block; margin-bottom: 5px; } .result-value { font-size: 1.5rem; font-weight: bold; color: #2ecc71; } .result-value.large { font-size: 2.2rem; } .article-content { margin-top: 40px; border-top: 2px solid #eee; padding-top: 20px; } .article-content h2 { color: #2c3e50; margin-top: 30px; } .article-content p { margin-bottom: 15px; color: #555; } .article-content ul { margin-bottom: 20px; padding-left: 20px; } .article-content li { margin-bottom: 10px; } @media (max-width: 768px) { .calculator-wrapper { flex-direction: column; } .container { padding: 20px; } }

Mortgage Payment Calculator

Estimate your monthly mortgage payments accurately by including taxes, insurance, and HOA fees.

30 Years 20 Years 15 Years 10 Years
Total Monthly Payment $0.00
Principal & Interest $0.00
Monthly Tax & Insurance $0.00
Total Interest Paid (Loan Life) $0.00

Understanding Your Mortgage Calculation

Buying a home is one of the most significant financial decisions you will make. This Mortgage Payment Calculator helps you understand exactly how much you will pay each month, breaking down the costs beyond just the bank loan. Understanding the PITI (Principal, Interest, Taxes, and Insurance) components is crucial for budgeting effectively.

Key Factors Affecting Your Mortgage Payment

  • Principal: The amount of money you borrowed to buy the home. Each month, a portion of your payment reduces this balance.
  • Interest: The cost of borrowing money. In the early years of a mortgage, a large percentage of your payment goes toward interest rather than principal.
  • Property Taxes: Assessed by your local government. These are usually bundled into your monthly payment and held in an escrow account.
  • Homeowners Insurance: Protects your property against damage. Like taxes, this is often paid monthly into an escrow account.
  • HOA Fees: If you live in a community with a Homeowners Association, these fees are paid directly to the association but affect your monthly affordability.

How Down Payment Impacts Costs

Your down payment significantly influences your mortgage terms. A larger down payment reduces the loan amount, which lowers your monthly principal and interest payments. Additionally, if you put down less than 20% of the home's value, you may be required to pay Private Mortgage Insurance (PMI), which increases your monthly costs until you reach 20% equity.

Choosing the Right Loan Term

The loan term determines how long you have to repay the loan. A 30-year term offers lower monthly payments but results in paying significantly more interest over the life of the loan. Conversely, a 15-year term has higher monthly payments but saves you money on interest and helps you build equity faster.

Why Calculate Before You Buy?

Using a mortgage calculator allows you to test different scenarios. You can see how a change in interest rates affects your purchasing power or determine if you can afford a home with higher property taxes. Always aim for a monthly payment that allows you to maintain a comfortable lifestyle while saving for other financial goals.

// Initial Calculation on load window.onload = function() { calculateMortgage(); }; function updateDownPaymentPercent() { var price = parseFloat(document.getElementById('homePrice').value) || 0; var downAmt = parseFloat(document.getElementById('downPayment').value) || 0; if (price > 0) { var percent = (downAmt / price) * 100; document.getElementById('downPaymentPercent').value = percent.toFixed(2); } } function updateDownPaymentAmount() { var price = parseFloat(document.getElementById('homePrice').value) || 0; var downPercent = parseFloat(document.getElementById('downPaymentPercent').value) || 0; var amount = price * (downPercent / 100); document.getElementById('downPayment').value = amount.toFixed(0); } function formatMoney(number) { return number.toLocaleString('en-US', { style: 'currency', currency: 'USD' }); } function calculateMortgage() { // Get Input Values var homePrice = parseFloat(document.getElementById('homePrice').value); var downPayment = parseFloat(document.getElementById('downPayment').value); var loanTermYears = parseInt(document.getElementById('loanTerm').value); var interestRateYearly = parseFloat(document.getElementById('interestRate').value); var propertyTaxYearly = parseFloat(document.getElementById('propertyTax').value); var homeInsuranceYearly = parseFloat(document.getElementById('homeInsurance').value); var hoaFeesMonthly = parseFloat(document.getElementById('hoaFees').value); // Validation to prevent NaN errors if (isNaN(homePrice)) homePrice = 0; if (isNaN(downPayment)) downPayment = 0; if (isNaN(loanTermYears)) loanTermYears = 30; if (isNaN(interestRateYearly)) interestRateYearly = 0; if (isNaN(propertyTaxYearly)) propertyTaxYearly = 0; if (isNaN(homeInsuranceYearly)) homeInsuranceYearly = 0; if (isNaN(hoaFeesMonthly)) hoaFeesMonthly = 0; // Core Calculations var loanAmount = homePrice – downPayment; var numPayments = loanTermYears * 12; var monthlyInterestRate = (interestRateYearly / 100) / 12; var monthlyPrincipalAndInterest = 0; // Handle zero interest case or standard case if (monthlyInterestRate === 0) { monthlyPrincipalAndInterest = loanAmount / numPayments; } else { // Formula: M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ] var mathPower = Math.pow(1 + monthlyInterestRate, numPayments); monthlyPrincipalAndInterest = loanAmount * (monthlyInterestRate * mathPower) / (mathPower – 1); } // Make sure we don't return NaN if loan amount is 0 or negative if (loanAmount <= 0) { monthlyPrincipalAndInterest = 0; } var monthlyTax = propertyTaxYearly / 12; var monthlyInsurance = homeInsuranceYearly / 12; var totalMonthlyPayment = monthlyPrincipalAndInterest + monthlyTax + monthlyInsurance + hoaFeesMonthly; var totalCostOfLoan = (monthlyPrincipalAndInterest * numPayments); var totalInterestPaid = totalCostOfLoan – loanAmount; if (loanAmount <= 0) { totalInterestPaid = 0; } // Update UI document.getElementById('totalMonthlyDisplay').innerText = formatMoney(totalMonthlyPayment); document.getElementById('principalInterestDisplay').innerText = formatMoney(monthlyPrincipalAndInterest); document.getElementById('taxInsuranceDisplay').innerText = formatMoney(monthlyTax + monthlyInsurance + hoaFeesMonthly); document.getElementById('totalInterestDisplay').innerText = formatMoney(totalInterestPaid); }

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