Payment Calculator with Interest

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Rental Property ROI Calculator

Calculate your Cap Rate, Cash-on-Cash Return, and Monthly Cash Flow instantly.

Monthly Mortgage (P&I): $0.00
Total Monthly Expenses: $0.00
Monthly Cash Flow: $0.00
Cap Rate: 0.00%
Cash-on-Cash Return: 0.00%

Understanding Rental Property ROI

Investing in real estate is one of the most proven ways to build long-term wealth. However, to be a successful landlord, you must understand the math behind the deal. A rental property ROI calculator helps you strip away the emotion and look at the raw data.

Key Metrics Explained

1. Cap Rate (Capitalization Rate): This is the ratio of Net Operating Income (NOI) to the property purchase price. It assumes you bought the property in cash. It is the best metric for comparing the natural profitability of one property against another without financing bias.

2. Cash-on-Cash (CoC) Return: This is arguably the most important metric for leveraged investors. It measures the annual cash flow relative to the actual cash you invested (down payment and closing costs). If you put $60,000 down and make $6,000 in annual profit, your CoC return is 10%.

3. Monthly Cash Flow: This is what is left in your pocket after every single bill is paid, including the mortgage, taxes, insurance, and a buffer for repairs and vacancies.

Example Calculation

Imagine a property priced at $200,000 with a 20% down payment ($40,000). If the monthly rent is $2,000 and total expenses (including mortgage) are $1,600, your monthly cash flow is $400. Annually, that is $4,800. Your Cash-on-Cash return would be $4,800 divided by $40,000, resulting in a 12% return.

How to Improve Your ROI

  • Reduce Vacancy: Even one month of vacancy can destroy your annual profit. Screen tenants thoroughly to ensure long-term stays.
  • Value-Add Renovations: Upgrading kitchens or adding a bedroom can allow for significantly higher rent increases compared to the cost of the renovation.
  • Refinance: If interest rates drop, refinancing your mortgage can lower your monthly expenses and instantly boost your cash flow.
function calculateROI() { var price = parseFloat(document.getElementById('propPrice').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 taxes = parseFloat(document.getElementById('annualTaxes').value); var insurance = parseFloat(document.getElementById('annualIns').value); var maintPercent = parseFloat(document.getElementById('maintenance').value); if (isNaN(price) || isNaN(rent)) { alert("Please enter valid numbers for Price and Rent."); return; } // Mortgage Calculation var downPaymentAmount = price * (downPercent / 100); var loanAmount = price – downPaymentAmount; var monthlyRate = (rate / 100) / 12; var numberOfPayments = term * 12; var monthlyMortgage = 0; if (rate > 0) { monthlyMortgage = loanAmount * (monthlyRate * Math.pow(1 + monthlyRate, numberOfPayments)) / (Math.pow(1 + monthlyRate, numberOfPayments) – 1); } else { monthlyMortgage = loanAmount / numberOfPayments; } // Expenses Calculation var monthlyTaxes = taxes / 12; var monthlyIns = insurance / 12; var monthlyMaint = rent * (maintPercent / 100); var totalMonthlyExpenses = monthlyMortgage + monthlyTaxes + monthlyIns + monthlyMaint; // Cash Flow var monthlyCashFlow = rent – totalMonthlyExpenses; var annualCashFlow = monthlyCashFlow * 12; // Cap Rate Calculation (NOI / Price) // NOI = Annual Rent – Operating Expenses (Excluding Mortgage) var annualOperatingExpenses = (monthlyTaxes + monthlyIns + monthlyMaint) * 12; var noi = (rent * 12) – annualOperatingExpenses; var capRate = (noi / price) * 100; // Cash on Cash Return (Annual Cash Flow / Down Payment) var cocReturn = (annualCashFlow / downPaymentAmount) * 100; // Display Results document.getElementById('resMortgage').innerText = "$" + monthlyMortgage.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resExpenses').innerText = "$" + totalMonthlyExpenses.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resCashFlow').innerText = "$" + monthlyCashFlow.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resCapRate').innerText = capRate.toFixed(2) + "%"; document.getElementById('resCoC').innerText = cocReturn.toFixed(2) + "%"; document.getElementById('results').style.display = 'block'; // Color coding for cash flow if (monthlyCashFlow < 0) { document.getElementById('resCashFlow').style.color = '#e74c3c'; } else { document.getElementById('resCashFlow').style.color = '#27ae60'; } }

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