Home Loan Mortgage Calculator

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Rental Property ROI Calculator

Monthly Mortgage Payment (P&I):
Total Monthly Cash Flow:
Annual Net Operating Income (NOI):
Cap Rate:
Cash-on-Cash Return:

How to Calculate Rental Property ROI

Calculating the Return on Investment (ROI) for a rental property is essential for real estate investors to determine the potential profitability of a deal. Unlike simple stocks, real estate ROI involves multiple factors including leverage (mortgages), operating expenses, and vacancy rates.

Key Metrics Explained

  • Cap Rate (Capitalization Rate): This measures the property's natural rate of return without considering financing. It is calculated by dividing the Net Operating Income (NOI) by the purchase price.
  • Cash-on-Cash Return: This is often considered the most important metric for investors using loans. It calculates the annual cash flow relative to the actual cash invested (the down payment and closing costs).
  • Net Operating Income (NOI): Your total annual income minus all operating expenses (excluding mortgage payments).

Real-World ROI Example

Imagine you purchase a duplex for $300,000 with a 20% down payment ($60,000). Your monthly rent is $2,500, and your total monthly expenses (property tax, insurance, and maintenance) are $600. If your mortgage payment is $1,213, your monthly cash flow is $687 ($2,500 – $600 – $1,213).

In this scenario, your annual cash flow is $8,244. To find your Cash-on-Cash return, you divide $8,244 by your $60,000 investment, resulting in a 13.74% CoC return.

Why Expenses Matter

New investors often underestimate "hidden" costs. For an accurate ROI calculation, always factor in:

  • Property Taxes: Usually 1% to 2% of property value annually.
  • Insurance: Landlord-specific policies are required.
  • Maintenance/CapEx: Set aside 5-10% of rent for future repairs (roof, HVAC).
  • Property Management: Usually 8-10% of monthly rent if you aren't self-managing.
function calculateRentalROI() { var price = parseFloat(document.getElementById('purchasePrice').value); var downPercent = parseFloat(document.getElementById('downPayment').value); var rate = parseFloat(document.getElementById('interestRate').value); var term = parseFloat(document.getElementById('loanTerm').value); var rent = parseFloat(document.getElementById('monthlyRent').value); var opExpenses = parseFloat(document.getElementById('operatingExpenses').value); if (isNaN(price) || isNaN(downPercent) || isNaN(rate) || isNaN(term) || isNaN(rent) || isNaN(opExpenses)) { alert("Please enter valid numeric values for all fields."); return; } var downPaymentAmount = price * (downPercent / 100); var loanAmount = price – downPaymentAmount; var monthlyRate = (rate / 100) / 12; var numberOfPayments = term * 12; // Monthly Mortgage Calculation (P&I) var mortgage = 0; if (rate > 0) { mortgage = (loanAmount * monthlyRate * Math.pow(1 + monthlyRate, numberOfPayments)) / (Math.pow(1 + monthlyRate, numberOfPayments) – 1); } else { mortgage = loanAmount / numberOfPayments; } var totalMonthlyOutgo = mortgage + opExpenses; var monthlyCashFlow = rent – totalMonthlyOutgo; var annualCashFlow = monthlyCashFlow * 12; // NOI is income minus operating expenses (before debt service) var annualNOI = (rent – opExpenses) * 12; var capRate = (annualNOI / price) * 100; // Cash on Cash Return var cocReturn = (annualCashFlow / downPaymentAmount) * 100; // Display results document.getElementById('results').style.display = 'block'; document.getElementById('resMortgage').innerHTML = '$' + mortgage.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); var cfEl = document.getElementById('resCashFlow'); cfEl.innerHTML = '$' + monthlyCashFlow.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); cfEl.className = monthlyCashFlow >= 0 ? 'result-value value-positive' : 'result-value value-negative'; document.getElementById('resNOI').innerHTML = '$' + annualNOI.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resCapRate').innerHTML = capRate.toFixed(2) + '%'; var cocEl = document.getElementById('resCoC'); cocEl.innerHTML = cocReturn.toFixed(2) + '%'; cocEl.className = cocReturn >= 0 ? 'result-value value-positive' : 'result-value value-negative'; }

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