Actual Real Interest Rate Calculator

Mortgage Payment Calculator
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Mortgage Payment Calculator

$
$
%
Yrs
$
$
Please enter valid positive numbers for all fields.
Principal & Interest: $0.00
Property Tax (Monthly): $0.00
Home Insurance (Monthly): $0.00
Total Monthly Payment: $0.00
Loan Amount: $0
function calculateMortgage() { // Get inputs using var var homePrice = parseFloat(document.getElementById("mortgage_home_price").value); var downPayment = parseFloat(document.getElementById("mortgage_down_payment").value); var interestRate = parseFloat(document.getElementById("mortgage_interest_rate").value); var loanTermYears = parseFloat(document.getElementById("mortgage_loan_term").value); var propertyTaxAnnual = parseFloat(document.getElementById("mortgage_property_tax").value); var homeInsuranceAnnual = parseFloat(document.getElementById("mortgage_home_insurance").value); // Validation logic if (isNaN(homePrice) || isNaN(downPayment) || isNaN(interestRate) || isNaN(loanTermYears) || isNaN(propertyTaxAnnual) || isNaN(homeInsuranceAnnual) || homePrice < 0 || downPayment < 0 || interestRate < 0 || loanTermYears <= 0) { document.getElementById("mortgage_error").style.display = "block"; document.getElementById("mortgage_results").style.display = "none"; return; } // Hide error if valid document.getElementById("mortgage_error").style.display = "none"; // Calculation Logic var principal = homePrice – downPayment; var monthlyRate = (interestRate / 100) / 12; var numberOfPayments = loanTermYears * 12; // Principal & Interest Calculation (Amortization Formula) // M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ] var monthlyPrincipalInterest = 0; if (interestRate === 0) { monthlyPrincipalInterest = principal / numberOfPayments; } else { monthlyPrincipalInterest = principal * (monthlyRate * Math.pow(1 + monthlyRate, numberOfPayments)) / (Math.pow(1 + monthlyRate, numberOfPayments) – 1); } var monthlyTax = propertyTaxAnnual / 12; var monthlyInsurance = homeInsuranceAnnual / 12; var totalMonthlyPayment = monthlyPrincipalInterest + monthlyTax + monthlyInsurance; // Formatting Function function formatCurrency(num) { return "$" + num.toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,'); } // Output Results document.getElementById("res_principal_interest").innerHTML = formatCurrency(monthlyPrincipalInterest); document.getElementById("res_tax").innerHTML = formatCurrency(monthlyTax); document.getElementById("res_insurance").innerHTML = formatCurrency(monthlyInsurance); document.getElementById("res_total_payment").innerHTML = formatCurrency(totalMonthlyPayment); document.getElementById("res_loan_amount").innerHTML = formatCurrency(principal); // Show results div document.getElementById("mortgage_results").style.display = "block"; }

Understanding Your Mortgage Payment

Buying a home is one of the largest financial decisions most people make in their lifetime. Using our Mortgage Payment Calculator allows you to estimate your monthly housing costs accurately by factoring in not just the loan repayment, but also necessary holding costs like taxes and insurance. This comprehensive tool helps prospective homeowners budget effectively and understand exactly where their money goes each month.

What is PITI?

In the mortgage industry, your total monthly payment is often referred to as PITI. This stands for the four main components of your housing expense:

  • Principal: The portion of your payment that goes directly toward paying down the loan balance. In the early years of a mortgage, this amount is typically smaller than the interest portion.
  • Interest: The cost of borrowing money paid to the lender. On a standard fixed-rate mortgage, the interest portion is highest at the beginning of the term and decreases over time.
  • Taxes: Property taxes charged by your local government. These are often collected by your lender in an escrow account and paid on your behalf annually.
  • Insurance: Homeowners insurance protects your property against damage. Like taxes, this is usually bundled into your monthly payment via escrow.

How Interest Rates Affect Your Payment

Even a small difference in interest rates can have a massive impact on your monthly payment and the total cost of the loan. For example, on a $300,000 loan, the difference between a 6% and a 7% interest rate is roughly $200 per month. Over a 30-year term, that single percentage point can cost you over $70,000 in additional interest.

15-Year vs. 30-Year Mortgages

The term of your loan plays a significant role in your financial planning:

  • 30-Year Fixed: Offers lower monthly payments because the principal repayment is spread over a longer period. However, you will pay significantly more in total interest over the life of the loan.
  • 15-Year Fixed: Comes with higher monthly payments, but you build equity much faster and pay far less in total interest. Interest rates for 15-year loans are also typically lower than 30-year loans.

Tips for Lowering Your Mortgage Payment

If the estimated payment is higher than your budget allows, consider these strategies:

  • Increase your down payment: Putting more money down reduces the principal loan amount and may eliminate the need for Private Mortgage Insurance (PMI).
  • Improve your credit score: A higher credit score often qualifies you for better interest rates.
  • Shop for cheaper insurance: Homeowners insurance premiums vary by provider; shopping around can save you hundreds per year.
  • Buy "points": You can pay an upfront fee to lower your interest rate for the life of the loan.

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