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Mortgage Payment Calculator

Calculate your monthly home loan payments instantly

30 Years 20 Years 15 Years 10 Years

Your Estimated Monthly Payment

$0.00
Total Loan Amount $0
Total Interest Paid $0

Understanding Your Mortgage Payment

A mortgage payment is more than just repaying the money you borrowed. For most homeowners, the monthly check sent to the lender covers four main components, often referred to as PITI: Principal, Interest, Taxes, and Insurance.

How the Mortgage Formula Works

This calculator uses the standard amortization formula to determine your fixed monthly payment:

M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ]

  • M: Total monthly payment
  • P: Principal loan amount (Home Price minus Down Payment)
  • i: Monthly interest rate (Annual rate divided by 12)
  • n: Number of months (Years multiplied by 12)

Example Calculation

If you purchase a home for $400,000 with a 20% down payment ($80,000), your loan amount is $320,000. At a 6% interest rate for 30 years:

  • Monthly Principal & Interest: $1,918.56
  • Total Interest over 30 years: $370,681.60
  • Total Paid: $690,681.60

3 Tips to Lower Your Monthly Payment

  1. Increase your Down Payment: Borrowing less reduces the principal and may eliminate the need for Private Mortgage Insurance (PMI).
  2. Improve your Credit Score: Borrowers with scores above 740 typically qualify for the lowest available interest rates.
  3. Choose a Longer Term: While a 30-year loan has higher total interest, the monthly payments are significantly lower than a 15-year loan.
function calculateMortgage() { var homePrice = parseFloat(document.getElementById('homePrice').value); var downPayment = parseFloat(document.getElementById('downPayment').value); var annualInterest = parseFloat(document.getElementById('interestRate').value); var years = parseInt(document.getElementById('loanTerm').value); if (isNaN(homePrice) || isNaN(downPayment) || isNaN(annualInterest) || homePrice <= 0) { alert("Please enter valid positive numbers for all fields."); return; } var principal = homePrice – downPayment; if (principal <= 0) { alert("Down payment cannot be equal to or greater than the home price."); return; } var monthlyInterest = (annualInterest / 100) / 12; var numberOfPayments = years * 12; var monthlyPayment; if (monthlyInterest === 0) { monthlyPayment = principal / numberOfPayments; } else { var x = Math.pow(1 + monthlyInterest, numberOfPayments); monthlyPayment = (principal * x * monthlyInterest) / (x – 1); } var totalPayment = monthlyPayment * numberOfPayments; var totalInterest = totalPayment – principal; document.getElementById('monthlyPayment').innerHTML = '$' + monthlyPayment.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('totalLoanVal').innerHTML = '$' + principal.toLocaleString(); document.getElementById('totalInterestVal').innerHTML = '$' + totalInterest.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resultArea').style.display = 'block'; // Smooth scroll to result document.getElementById('resultArea').scrollIntoView({ behavior: 'smooth', block: 'nearest' }); }

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