Rental Property Cash on Cash Return Calculator
body {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
line-height: 1.6;
color: #333;
max-width: 1200px;
margin: 0 auto;
padding: 20px;
}
.roi-calc-container {
display: flex;
flex-wrap: wrap;
gap: 30px;
background: #f9fbfd;
border: 1px solid #e1e4e8;
border-radius: 8px;
padding: 30px;
margin-bottom: 40px;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.roi-inputs {
flex: 1;
min-width: 300px;
}
.roi-results {
flex: 1;
min-width: 300px;
background: #ffffff;
border: 1px solid #d1d9e6;
border-radius: 8px;
padding: 25px;
display: flex;
flex-direction: column;
justify-content: center;
}
.input-group {
margin-bottom: 20px;
}
.input-group label {
display: block;
margin-bottom: 8px;
font-weight: 600;
color: #2c3e50;
font-size: 14px;
}
.input-group input {
width: 100%;
padding: 12px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 16px;
box-sizing: border-box;
transition: border-color 0.3s;
}
.input-group input:focus {
border-color: #007bff;
outline: none;
}
.calc-btn {
background-color: #007bff;
color: white;
border: none;
padding: 15px 30px;
font-size: 18px;
font-weight: bold;
border-radius: 4px;
cursor: pointer;
width: 100%;
transition: background-color 0.2s;
}
.calc-btn:hover {
background-color: #0056b3;
}
.result-row {
display: flex;
justify-content: space-between;
align-items: center;
padding: 15px 0;
border-bottom: 1px solid #eee;
}
.result-row:last-child {
border-bottom: none;
}
.result-label {
font-size: 15px;
color: #555;
}
.result-value {
font-size: 18px;
font-weight: 700;
color: #2c3e50;
}
.highlight-result {
background-color: #f0f7ff;
padding: 15px;
border-radius: 6px;
margin-top: 10px;
}
.highlight-result .result-value {
color: #007bff;
font-size: 24px;
}
.content-section {
margin-top: 40px;
}
.content-section h2 {
color: #2c3e50;
margin-top: 30px;
border-bottom: 2px solid #007bff;
padding-bottom: 10px;
display: inline-block;
}
.content-section h3 {
color: #444;
margin-top: 25px;
}
.content-section ul, .content-section ol {
margin-left: 20px;
margin-bottom: 20px;
}
.content-section p {
margin-bottom: 15px;
}
.error-msg {
color: #dc3545;
font-size: 14px;
margin-top: 5px;
display: none;
}
@media (max-width: 768px) {
.roi-calc-container {
flex-direction: column;
padding: 20px;
}
}
Financial Breakdown
Total Cash Invested
$55,000
Monthly Mortgage Payment
$1,264
Monthly Cash Flow
$136
Annual Cash Flow
$1,632
Cash on Cash Return
2.97%
*Mortgage calculation assumes Principal & Interest only.
function calculateRentalROI() {
// Get input elements
var priceInput = document.getElementById('purchasePrice');
var downInput = document.getElementById('downPayment');
var rateInput = document.getElementById('interestRate');
var termInput = document.getElementById('loanTerm');
var closingInput = document.getElementById('closingCosts');
var rentInput = document.getElementById('monthlyRent');
var expenseInput = document.getElementById('monthlyExpenses');
var errorDiv = document.getElementById('errorDisplay');
// Parse values
var price = parseFloat(priceInput.value);
var downPercent = parseFloat(downInput.value);
var ratePercent = parseFloat(rateInput.value);
var years = parseFloat(termInput.value);
var closing = parseFloat(closingInput.value);
var monthlyRent = parseFloat(rentInput.value);
var monthlyExp = parseFloat(expenseInput.value);
// Validate inputs
if (isNaN(price) || isNaN(downPercent) || isNaN(ratePercent) || isNaN(years) ||
isNaN(closing) || isNaN(monthlyRent) || isNaN(monthlyExp) ||
price <= 0 || years 0) {
cocReturn = (annualCashFlow / totalCashInvested) * 100;
}
// 5. Update UI
// Helper for currency formatting
var fmt = new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD', minimumFractionDigits: 0, maximumFractionDigits: 0 });
document.getElementById('resTotalInvested').innerText = fmt.format(totalCashInvested);
document.getElementById('resMortgage').innerText = fmt.format(monthlyMortgage);
document.getElementById('resMonthlyCashFlow').innerText = fmt.format(monthlyCashFlow);
document.getElementById('resAnnualCashFlow').innerText = fmt.format(annualCashFlow);
document.getElementById('resCoC').innerText = cocReturn.toFixed(2) + "%";
// Change color based on profitability
var cocElement = document.getElementById('resCoC');
if (cocReturn = 8) {
cocElement.style.color = '#28a745';
} else {
cocElement.style.color = '#007bff';
}
}
What is Cash on Cash Return?
Cash on Cash Return (CoC) is one of the most important metrics in real estate investing. Unlike standard Return on Investment (ROI), which might look at the total value of the asset, CoC specifically measures the annual return you make on the actual cash you invested out of pocket.
It answers the critical question: "For every dollar I put into this property, how much cash does it generate for me each year?"
The Cash on Cash Formula
The calculation relies on two main figures: your Annual Pre-Tax Cash Flow and your Total Cash Invested.
Cash on Cash Return = (Annual Pre-Tax Cash Flow / Total Cash Invested) × 100%
- Annual Cash Flow: This is your gross rental income minus all operating expenses (taxes, insurance, maintenance, vacancy) and debt service (mortgage payments).
- Total Cash Invested: This includes your down payment, closing costs, and any immediate repair or renovation costs required to get the property rented.
How to Use This Calculator
- Enter Property Details: Input the purchase price and your loan terms. Be sure to include an estimate for "Closing Costs & Rehab" as this significantly impacts your total cash invested.
- Input Income & Expenses: Enter the expected monthly rent. For expenses, sum up property taxes, insurance, HOA fees, property management fees, and a buffer for repairs/vacancy. A common rule of thumb is that operating expenses (excluding mortgage) often run 35-50% of the rent, though this varies by property type.
- Analyze the Result: The calculator will generate your monthly cash flow and your Cash on Cash return percentage.
Example Scenario
Let's say you are buying a single-family rental for $200,000.
- Down Payment: 20% ($40,000)
- Closing Costs/Repairs: $5,000
- Total Cash Invested: $45,000
- Monthly Rent: $1,800
- Monthly Mortgage: ~$1,000 (depending on rate)
- Other Expenses: $500
- Monthly Cash Flow: $300 ($1,800 – $1,000 – $500)
- Annual Cash Flow: $3,600
In this scenario, your calculation is: ($3,600 / $45,000) = 8.0% Cash on Cash Return. This means you are earning an 8% yield on your money, regardless of what the property value does.
What is a Good Cash on Cash Return?
A "good" return is subjective, but many real estate investors target a CoC return between 8% and 12%. In highly appreciative markets (like coastal cities), investors might accept 4-6% because they bank on the property value rising. In cash-flow markets (like the Midwest), investors often seek 10-15% returns to offset lower appreciation potential.