.rpic-row {
display: flex;
flex-wrap: wrap;
margin: 0 -10px;
}
.rpic-col {
flex: 50%;
padding: 0 10px;
box-sizing: border-box;
margin-bottom: 15px;
}
.rpic-col h3 {
font-size: 18px;
color: #2c3e50;
border-bottom: 2px solid #eee;
padding-bottom: 10px;
margin-bottom: 15px;
}
.rpic-input-group {
margin-bottom: 15px;
}
.rpic-input-group label {
display: block;
margin-bottom: 5px;
font-weight: 600;
color: #555;
font-size: 14px;
}
.rpic-input-group input {
width: 100%;
padding: 10px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 15px;
box-sizing: border-box;
}
.rpic-input-group input:focus {
border-color: #3498db;
outline: none;
}
.rpic-btn {
width: 100%;
padding: 15px;
background-color: #27ae60;
color: white;
border: none;
border-radius: 4px;
font-size: 18px;
font-weight: bold;
cursor: pointer;
transition: background 0.3s;
margin-top: 10px;
}
.rpic-btn:hover {
background-color: #219150;
}
#rpic-results {
background-color: #f8f9fa;
border: 1px solid #e9ecef;
border-radius: 6px;
padding: 20px;
margin-top: 25px;
display: none;
}
.rpic-result-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
}
.rpic-metric {
text-align: center;
background: white;
padding: 15px;
border-radius: 4px;
box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}
.rpic-metric span {
display: block;
font-size: 14px;
color: #7f8c8d;
text-transform: uppercase;
letter-spacing: 1px;
}
.rpic-metric strong {
display: block;
font-size: 24px;
color: #2c3e50;
margin-top: 5px;
}
.rpic-metric.highlight strong {
color: #27ae60;
}
@media (max-width: 600px) {
.rpic-col { flex: 100%; }
.rpic-result-grid { grid-template-columns: 1fr; }
}
function calculateRentalProperty() {
// 1. Get Values
var price = parseFloat(document.getElementById('rpic_price').value);
var closingCosts = parseFloat(document.getElementById('rpic_closing').value);
var rehabCosts = parseFloat(document.getElementById('rpic_rehab').value);
var downPercent = parseFloat(document.getElementById('rpic_down').value);
var interestRate = parseFloat(document.getElementById('rpic_rate').value);
var loanTerm = parseFloat(document.getElementById('rpic_term').value);
var monthlyRent = parseFloat(document.getElementById('rpic_rent').value);
var otherIncome = parseFloat(document.getElementById('rpic_other_inc').value);
var vacancyRate = parseFloat(document.getElementById('rpic_vacancy').value);
var annualTax = parseFloat(document.getElementById('rpic_tax').value);
var annualInsurance = parseFloat(document.getElementById('rpic_insurance').value);
var monthlyHOA = parseFloat(document.getElementById('rpic_hoa').value);
var maintenancePercent = parseFloat(document.getElementById('rpic_maint').value);
var pmPercent = parseFloat(document.getElementById('rpic_pm').value);
// Validation
if (isNaN(price) || isNaN(downPercent) || isNaN(interestRate) || isNaN(loanTerm) || isNaN(monthlyRent)) {
alert("Please enter valid numbers for all key fields.");
return;
}
// 2. Loan Calculations
var downPaymentAmount = price * (downPercent / 100);
var loanAmount = price – downPaymentAmount;
var monthlyRate = (interestRate / 100) / 12;
var numberOfPayments = loanTerm * 12;
var monthlyMortgage = 0;
if (interestRate > 0) {
// M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ]
monthlyMortgage = loanAmount * (monthlyRate * Math.pow(1 + monthlyRate, numberOfPayments)) / (Math.pow(1 + monthlyRate, numberOfPayments) – 1);
} else {
monthlyMortgage = loanAmount / numberOfPayments;
}
// 3. Income Calculations
var grossMonthlyIncome = monthlyRent + otherIncome;
var vacancyLoss = grossMonthlyIncome * (vacancyRate / 100);
var effectiveGrossIncome = grossMonthlyIncome – vacancyLoss;
// 4. Expense Calculations
var monthlyTax = annualTax / 12;
var monthlyInsurance = annualInsurance / 12;
var maintenanceCost = grossMonthlyIncome * (maintenancePercent / 100);
var pmCost = grossMonthlyIncome * (pmPercent / 100);
var operatingExpenses = monthlyTax + monthlyInsurance + monthlyHOA + maintenanceCost + pmCost;
var totalMonthlyExpenses = operatingExpenses + monthlyMortgage;
// 5. Profit Metrics
var monthlyNOI = effectiveGrossIncome – operatingExpenses;
var monthlyCashFlow = monthlyNOI – monthlyMortgage;
var annualCashFlow = monthlyCashFlow * 12;
var annualNOI = monthlyNOI * 12;
// 6. ROI Metrics
var totalCashInvested = downPaymentAmount + closingCosts + rehabCosts;
var cashOnCashReturn = (annualCashFlow / totalCashInvested) * 100;
var capRate = (annualNOI / price) * 100;
// 7. Display Results
document.getElementById('res_cashflow').innerText = "$" + monthlyCashFlow.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('res_coc').innerText = cashOnCashReturn.toFixed(2) + "%";
document.getElementById('res_noi').innerText = "$" + monthlyNOI.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('res_cap').innerText = capRate.toFixed(2) + "%";
document.getElementById('res_cash_needed').innerText = "$" + totalCashInvested.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('res_expenses').innerText = "$" + totalMonthlyExpenses.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('rpic-results').style.display = 'block';
}
Rental Property ROI Calculator
Purchase Information
Loan Details
Monthly Income
Recurring Expenses
Investment Analysis
Monthly Cash Flow
$0.00
Cash on Cash Return
0.00%
Net Operating Income (Monthly)
$0.00
Cap Rate
0.00%
Total Cash Needed
$0.00
Monthly Expenses
$0.00
Understanding Rental Property Investment Analysis
Investing in real estate is a numbers game. To succeed, you must separate emotion from data. This Rental Property ROI Calculator is designed to help investors evaluate the potential profitability of a residential rental property. It calculates key metrics like Cash Flow, Cash on Cash Return (CoC), and Cap Rate.
Key Metrics Explained
1. Monthly Cash Flow
This is the profit you take home every month after all bills are paid. It is calculated as:
Total Income – (Operating Expenses + Mortgage Payment) = Cash Flow
Positive cash flow is essential for long-term sustainability, as it builds reserves for future repairs and vacancies.
2. Cash on Cash Return (CoC)
This is arguably the most important metric for rental investors. It measures the annual return on the actual cash you invested, rather than the total loan amount. It answers the question: "For every dollar I put into this deal, how many cents do I get back this year?"
- Formula: (Annual Cash Flow / Total Cash Invested) × 100
- Good Target: Many investors aim for 8-12% or higher, depending on the market risk.
3. Net Operating Income (NOI)
NOI is the profitability of the property before financing costs (mortgage) are considered. It is used to calculate the Cap Rate. It includes income minus expenses like taxes, insurance, and maintenance, but excludes principal and interest payments.
4. Cap Rate (Capitalization Rate)
Cap Rate helps you compare the profitability of similar properties regardless of how they are financed (bought with cash vs. loan). A higher Cap Rate generally indicates a higher return, but often comes with higher risk.
Accurately Estimating Expenses
One of the biggest mistakes new investors make is underestimating expenses. When using this calculator, ensure you account for:
- Vacancy: Even in hot markets, tenants leave. A standard conservative estimate is 5-8% (about 3 weeks of vacancy per year).
- Maintenance: Things break. Setting aside 5-10% of the rent every month ensures you have funds when the water heater fails.
- Property Management: Even if you self-manage, you should factor in 8-10% to see if the deal still works if you decide to hire a manager later.