Free Mortgage Calculator

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Rental Property ROI & Cash Flow Calculator

Analyze your real estate investment potential with precision.

Investment Analysis Results

Total Initial Investment: $0.00
Gross Annual Income: $0.00
Annual Operating Expenses: $0.00
Net Annual Cash Flow: $0.00
Cash-on-Cash Return (ROI): 0.00%
Cap Rate: 0.00%

Understanding Rental Property ROI

Investing in real estate is one of the most proven ways to build long-term wealth. However, the difference between a "good deal" and a "money pit" often comes down to the math. Our Rental Property ROI Calculator helps you strip away the emotion and look strictly at the financial performance of a property.

Key Metrics Explained

  • Cash-on-Cash Return: This measures the annual cash flow relative to the actual amount of cash you invested. It is often considered the most important metric for rental investors.
  • Cap Rate (Capitalization Rate): This calculates the property's natural rate of return without considering financing. It's used to compare the profitability of different properties regardless of how they are paid for.
  • Vacancy Rate: Real estate isn't always occupied. A 5% to 8% vacancy buffer is a standard conservative estimate to ensure your numbers remain realistic.

Realistic Example:

Imagine you purchase a duplex for $300,000. You spend $15,000 on closing costs and minor paint jobs. Your total out-of-pocket is $315,000 (assuming a cash purchase for this example, or your down payment + costs).

If the units rent for a combined $2,500 per month, your gross annual income is $30,000. After subtracting taxes, insurance, and a 5% vacancy rate, your net profit might be $18,000. This results in a 5.7% ROI.

How to Improve Your Rental ROI

If your calculated ROI is lower than desired, consider these three levers:

1. Value-Add Renovations: Increasing the quality of the kitchen or flooring can often justify a significant rent increase, boosting your numerator (income) more than your denominator (investment).

2. Expense Management: Periodically shop around for landlord insurance or appeal property tax assessments to lower your recurring monthly costs.

3. Optimize Financing: If interest rates drop, refinancing your mortgage can significantly increase your monthly cash flow.

function calculateRentalROI() { // Get values from inputs var purchasePrice = parseFloat(document.getElementById('purchasePrice').value) || 0; var closingCosts = parseFloat(document.getElementById('closingCosts').value) || 0; var monthlyRent = parseFloat(document.getElementById('monthlyRent').value) || 0; var monthlyMortgage = parseFloat(document.getElementById('monthlyMortgage').value) || 0; var monthlyExpenses = parseFloat(document.getElementById('monthlyExpenses').value) || 0; var vacancyRate = parseFloat(document.getElementById('vacancyRate').value) || 0; // Logic Calculations var totalInvestment = purchasePrice + closingCosts; // Annualized Gross Income (Adjusted for Vacancy) var annualGrossPotential = monthlyRent * 12; var vacancyLoss = annualGrossPotential * (vacancyRate / 100); var effectiveGrossIncome = annualGrossPotential – vacancyLoss; // Annual Expenses var annualMortgage = monthlyMortgage * 12; var annualOperatingExpenses = monthlyExpenses * 12; var totalAnnualOutlay = annualMortgage + annualOperatingExpenses; // Cash Flow and ROI var netAnnualCashFlow = effectiveGrossIncome – totalAnnualOutlay; var cashOnCashReturn = (totalInvestment > 0) ? (netAnnualCashFlow / totalInvestment) * 100 : 0; // Cap Rate (NOI / Purchase Price) – NOI excludes mortgage var netOperatingIncome = effectiveGrossIncome – annualOperatingExpenses; var capRate = (purchasePrice > 0) ? (netOperatingIncome / purchasePrice) * 100 : 0; // Display results document.getElementById('resTotalInvest').innerText = '$' + totalInvestment.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resGrossIncome').innerText = '$' + effectiveGrossIncome.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resAnnualExp').innerText = '$' + totalAnnualOutlay.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resCashFlow').innerText = '$' + netAnnualCashFlow.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('resROI').innerText = cashOnCashReturn.toFixed(2) + '%'; document.getElementById('resCapRate').innerText = capRate.toFixed(2) + '%'; // Show the result box document.getElementById('result-box').style.display = 'block'; }

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