#rental-property-calculator-container {
font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
color: #333;
line-height: 1.6;
}
#rental-property-calculator-container * {
box-sizing: border-box;
}
.rpc-wrapper {
background-color: #f9f9f9;
border: 1px solid #e0e0e0;
border-radius: 8px;
padding: 30px;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
margin-bottom: 40px;
}
.rpc-header {
text-align: center;
margin-bottom: 25px;
}
.rpc-header h2 {
margin: 0;
color: #2c3e50;
font-size: 24px;
}
.rpc-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
}
@media (max-width: 600px) {
.rpc-grid {
grid-template-columns: 1fr;
}
}
.rpc-input-group {
margin-bottom: 15px;
}
.rpc-input-group label {
display: block;
margin-bottom: 5px;
font-weight: 600;
font-size: 14px;
color: #555;
}
.rpc-input-group input {
width: 100%;
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 16px;
}
.rpc-input-group input:focus {
border-color: #3498db;
outline: none;
box-shadow: 0 0 5px rgba(52,152,219,0.3);
}
.rpc-section-title {
grid-column: 1 / -1;
font-size: 18px;
font-weight: bold;
color: #2980b9;
margin-top: 10px;
border-bottom: 2px solid #eee;
padding-bottom: 5px;
margin-bottom: 15px;
}
.rpc-btn {
grid-column: 1 / -1;
background-color: #27ae60;
color: white;
border: none;
padding: 15px;
font-size: 18px;
font-weight: bold;
border-radius: 5px;
cursor: pointer;
transition: background-color 0.3s;
text-align: center;
margin-top: 10px;
}
.rpc-btn:hover {
background-color: #219150;
}
.rpc-results {
grid-column: 1 / -1;
background-color: #fff;
border: 1px solid #ddd;
border-radius: 5px;
padding: 20px;
margin-top: 20px;
display: none;
}
.rpc-result-row {
display: flex;
justify-content: space-between;
padding: 10px 0;
border-bottom: 1px solid #eee;
}
.rpc-result-row:last-child {
border-bottom: none;
}
.rpc-result-label {
font-weight: 500;
}
.rpc-result-value {
font-weight: bold;
color: #2c3e50;
}
.rpc-highlight {
background-color: #e8f6f3;
padding: 15px;
border-radius: 5px;
margin-bottom: 10px;
border-left: 5px solid #1abc9c;
}
.rpc-highlight .rpc-result-value {
color: #16a085;
font-size: 20px;
}
.rpc-content {
margin-top: 40px;
padding-top: 20px;
border-top: 1px solid #eee;
}
.rpc-content h3 {
color: #2c3e50;
margin-top: 25px;
font-size: 20px;
}
.rpc-content p {
margin-bottom: 15px;
color: #555;
}
.rpc-content ul {
margin-bottom: 15px;
padding-left: 20px;
}
.rpc-content li {
margin-bottom: 8px;
}
.rpc-error {
color: #c0392b;
text-align: center;
grid-column: 1 / -1;
margin-top: 10px;
display: none;
}
function calculateRentalROI() {
// Get Inputs
var price = parseFloat(document.getElementById('rpcPurchasePrice').value);
var closingCosts = parseFloat(document.getElementById('rpcClosingCosts').value);
var downPaymentPercent = parseFloat(document.getElementById('rpcDownPayment').value);
var interestRate = parseFloat(document.getElementById('rpcInterestRate').value);
var loanTerm = parseFloat(document.getElementById('rpcLoanTerm').value);
var monthlyRent = parseFloat(document.getElementById('rpcMonthlyRent').value);
var vacancyRate = parseFloat(document.getElementById('rpcVacancyRate').value);
var annualTax = parseFloat(document.getElementById('rpcPropertyTax').value);
var annualInsurance = parseFloat(document.getElementById('rpcInsurance').value);
var monthlyHOA = parseFloat(document.getElementById('rpcHOA').value);
var maintenancePercent = parseFloat(document.getElementById('rpcMaintenance').value);
var managementPercent = parseFloat(document.getElementById('rpcManagement').value);
// Validation
if (isNaN(price) || isNaN(interestRate) || isNaN(loanTerm) || isNaN(monthlyRent)) {
document.getElementById('rpcError').style.display = 'block';
document.getElementById('rpcResults').style.display = 'none';
return;
}
document.getElementById('rpcError').style.display = 'none';
// 1. Calculate Mortgage
var downPaymentAmount = price * (downPaymentPercent / 100);
var loanAmount = price – downPaymentAmount;
var monthlyInterest = (interestRate / 100) / 12;
var totalPayments = loanTerm * 12;
var monthlyMortgage = 0;
if (interestRate > 0) {
monthlyMortgage = loanAmount * (monthlyInterest * Math.pow(1 + monthlyInterest, totalPayments)) / (Math.pow(1 + monthlyInterest, totalPayments) – 1);
} else {
monthlyMortgage = loanAmount / totalPayments;
}
// 2. Calculate Income
var vacancyLoss = monthlyRent * (vacancyRate / 100);
var effectiveMonthlyIncome = monthlyRent – vacancyLoss;
var annualGrossIncome = effectiveMonthlyIncome * 12;
// 3. Calculate Operating Expenses
var monthlyTax = annualTax / 12;
var monthlyInsurance = annualInsurance / 12;
var monthlyMaintenance = monthlyRent * (maintenancePercent / 100);
var monthlyManagement = monthlyRent * (managementPercent / 100);
var totalMonthlyExpenses = monthlyTax + monthlyInsurance + monthlyHOA + monthlyMaintenance + monthlyManagement;
var annualOperatingExpenses = totalMonthlyExpenses * 12;
// 4. Calculate Metrics
var monthlyNOI = effectiveMonthlyIncome – totalMonthlyExpenses;
var annualNOI = monthlyNOI * 12;
var monthlyCashFlow = monthlyNOI – monthlyMortgage;
var annualCashFlow = monthlyCashFlow * 12;
var totalCashInvested = downPaymentAmount + closingCosts;
var capRate = (annualNOI / price) * 100;
var cashOnCash = 0;
if (totalCashInvested > 0) {
cashOnCash = (annualCashFlow / totalCashInvested) * 100;
}
// 5. Display Results
// Format currency helper
var fmtMoney = new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD' });
var fmtPct = new Intl.NumberFormat('en-US', { style: 'decimal', minimumFractionDigits: 2, maximumFractionDigits: 2 });
document.getElementById('resCashFlow').innerText = fmtMoney.format(monthlyCashFlow);
document.getElementById('resCashFlow').style.color = monthlyCashFlow >= 0 ? '#16a085' : '#c0392b';
document.getElementById('resCoC').innerText = fmtPct.format(cashOnCash) + "%";
document.getElementById('resCoC').style.color = cashOnCash >= 0 ? '#16a085' : '#c0392b';
document.getElementById('resCapRate').innerText = fmtPct.format(capRate) + "%";
document.getElementById('resNOI').innerText = fmtMoney.format(annualNOI);
document.getElementById('resTotalInvested').innerText = fmtMoney.format(totalCashInvested);
document.getElementById('resMortgage').innerText = fmtMoney.format(monthlyMortgage);
document.getElementById('resExpenses').innerText = fmtMoney.format(totalMonthlyExpenses);
document.getElementById('rpcResults').style.display = 'block';
}
Rental Property ROI Calculator
Calculate Cash Flow, Cap Rate, and Cash on Cash Return
Purchase Information
Rental Income
Operating Expenses
Please check your inputs. Values must be valid numbers.
Monthly Cash Flow
$0.00
Cash on Cash Return
0.00%
Cap Rate (Capitalization Rate)
0.00%
Net Operating Income (Annual)
$0.00
Total Cash Invested
$0.00
Monthly Breakdown:
Mortgage Payment (P&I)
$0.00
Total Operating Expenses
$0.00
Understanding Rental Property Analysis
Investing in real estate requires precise calculations to ensure a property will be profitable. This Rental Property ROI Calculator helps investors analyze the potential returns of a real estate investment by breaking down income, expenses, and key performance metrics.
Key Metrics Explained
- Cash Flow: The net amount of money moving in or out of the investment each month after all expenses and mortgage payments are made. Positive cash flow is essential for a sustainable rental business.
- Cash on Cash Return (CoC): A percentage measuring the annual pre-tax cash flow relative to the total cash invested. It tells you how hard your actual cash investment is working for you. A CoC of 8-12% is often considered good in many markets.
- Cap Rate (Capitalization Rate): This metric calculates the rate of return on the property based on the income the property is expected to generate, assuming the property was bought with cash (no loan). It is calculated as Net Operating Income (NOI) divided by the Purchase Price.
- Net Operating Income (NOI): The total annual revenue from the property minus all necessary operating expenses. NOI excludes mortgage payments (debt service) and capital expenditures.
How to Use This Calculator
Start by entering the Purchase Price and your financing details, including the Down Payment percentage and Interest Rate. Be sure to include Closing Costs, as these affect your total cash invested.
Next, input your expected Monthly Rent and a realistic Vacancy Rate (usually 5-10%).
Finally, detail your operating expenses. Don't overlook costs like Maintenance (saving 5-10% of rent is prudent), Property Management (typically 8-10% if hiring a professional), taxes, insurance, and HOA fees.
The calculator will instantly provide your estimated monthly cash flow and ROI metrics to help you make an informed investment decision.