.calculator-wrapper {
max-width: 800px;
margin: 0 auto;
font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
color: #333;
line-height: 1.6;
}
.calc-card {
background: #f9fbfd;
border: 1px solid #e1e4e8;
border-radius: 8px;
padding: 25px;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
margin-bottom: 40px;
}
.calc-title {
text-align: center;
color: #2c3e50;
margin-bottom: 25px;
font-size: 24px;
font-weight: 700;
}
.input-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
}
@media (max-width: 600px) {
.input-grid {
grid-template-columns: 1fr;
}
}
.input-group {
margin-bottom: 15px;
}
.input-group label {
display: block;
margin-bottom: 8px;
font-weight: 600;
font-size: 14px;
color: #4a5568;
}
.input-group input {
width: 100%;
padding: 10px;
border: 1px solid #cbd5e0;
border-radius: 4px;
font-size: 16px;
box-sizing: border-box;
transition: border-color 0.2s;
}
.input-group input:focus {
border-color: #3182ce;
outline: none;
box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.1);
}
.section-header {
grid-column: 1 / -1;
font-size: 18px;
color: #2b6cb0;
border-bottom: 2px solid #bee3f8;
padding-bottom: 5px;
margin-top: 10px;
margin-bottom: 15px;
}
.calc-btn {
grid-column: 1 / -1;
background-color: #2b6cb0;
color: white;
border: none;
padding: 15px;
font-size: 18px;
font-weight: bold;
border-radius: 6px;
cursor: pointer;
transition: background-color 0.2s;
margin-top: 10px;
width: 100%;
}
.calc-btn:hover {
background-color: #2c5282;
}
.results-area {
margin-top: 30px;
background: #fff;
border: 1px solid #e2e8f0;
border-radius: 6px;
padding: 20px;
display: none;
}
.result-row {
display: flex;
justify-content: space-between;
padding: 10px 0;
border-bottom: 1px solid #edf2f7;
}
.result-row:last-child {
border-bottom: none;
}
.result-label {
color: #718096;
font-size: 15px;
}
.result-value {
font-weight: 700;
font-size: 16px;
color: #2d3748;
}
.highlight-result {
background-color: #ebf8ff;
padding: 15px;
border-radius: 6px;
margin-top: 10px;
border-left: 4px solid #3182ce;
}
.highlight-value {
color: #2b6cb0;
font-size: 24px;
}
.article-content {
color: #4a5568;
}
.article-content h2 {
color: #2d3748;
margin-top: 30px;
}
.article-content p {
margin-bottom: 15px;
}
.article-content ul {
margin-bottom: 15px;
padding-left: 20px;
}
.article-content li {
margin-bottom: 8px;
}
function calculateRentalROI() {
// 1. Get Input Values
var price = parseFloat(document.getElementById('purchasePrice').value) || 0;
var downPayment = parseFloat(document.getElementById('downPayment').value) || 0;
var closingCosts = parseFloat(document.getElementById('closingCosts').value) || 0;
var rehabCosts = parseFloat(document.getElementById('rehabCosts').value) || 0;
var interestRate = parseFloat(document.getElementById('interestRate').value) || 0;
var loanTerm = parseFloat(document.getElementById('loanTerm').value) || 0;
var monthlyRent = parseFloat(document.getElementById('monthlyRent').value) || 0;
var monthlyExpenses = parseFloat(document.getElementById('monthlyExpenses').value) || 0;
// 2. Perform Calculations
// Loan Calculation
var loanAmount = price – downPayment;
var monthlyInterestRate = interestRate / 100 / 12;
var numberOfPayments = loanTerm * 12;
var monthlyMortgage = 0;
// Mortgage Formula: M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ]
if (loanAmount > 0 && monthlyInterestRate > 0 && numberOfPayments > 0) {
monthlyMortgage = loanAmount * (monthlyInterestRate * Math.pow(1 + monthlyInterestRate, numberOfPayments)) / (Math.pow(1 + monthlyInterestRate, numberOfPayments) – 1);
} else if (loanAmount > 0 && monthlyInterestRate === 0) {
monthlyMortgage = loanAmount / numberOfPayments;
}
// Cash Flow Calculation
var totalMonthlyExpenses = monthlyExpenses + monthlyMortgage;
var monthlyCashFlow = monthlyRent – totalMonthlyExpenses;
var annualCashFlow = monthlyCashFlow * 12;
// Investment Calculation
var totalCashInvested = downPayment + closingCosts + rehabCosts;
// Metrics Calculation
var cocReturn = 0;
if (totalCashInvested > 0) {
cocReturn = (annualCashFlow / totalCashInvested) * 100;
}
// Cap Rate Calculation: (Net Operating Income / Price) * 100
// NOI = (Rent – Operating Expenses excluding Mortgage) * 12
var annualNOI = (monthlyRent – monthlyExpenses) * 12;
var capRate = 0;
if (price > 0) {
capRate = (annualNOI / price) * 100;
}
// 3. Format and Display Results
var formatter = new Intl.NumberFormat('en-US', {
style: 'currency',
currency: 'USD',
minimumFractionDigits: 2
});
document.getElementById('resTotalInvested').innerText = formatter.format(totalCashInvested);
document.getElementById('resMortgage').innerText = formatter.format(monthlyMortgage);
document.getElementById('resTotalExpenses').innerText = formatter.format(totalMonthlyExpenses);
// Handle negative styling for cashflow
var cashFlowEl = document.getElementById('resMonthlyCashflow');
cashFlowEl.innerText = formatter.format(monthlyCashFlow);
cashFlowEl.style.color = monthlyCashFlow >= 0 ? '#2d3748' : '#e53e3e';
var annualCashFlowEl = document.getElementById('resAnnualCashflow');
annualCashFlowEl.innerText = formatter.format(annualCashFlow);
annualCashFlowEl.style.color = annualCashFlow >= 0 ? '#2d3748' : '#e53e3e';
document.getElementById('resCapRate').innerText = capRate.toFixed(2) + "%";
var cocEl = document.getElementById('resCoC');
cocEl.innerText = cocReturn.toFixed(2) + "%";
cocEl.style.color = cocReturn >= 0 ? '#2b6cb0' : '#e53e3e';
// Show results section
document.getElementById('resultsSection').style.display = 'block';
}
Rental Property Cash-on-Cash ROI Calculator
Purchase Information
Loan Details
Rental Income & Expenses
(Taxes, Insurance, HOA, Vacancy, CapEx)
Total Cash Invested (Down + Costs)
$0.00
Monthly Mortgage Payment (P&I)
$0.00
Total Monthly Expenses
$0.00
Monthly Cash Flow
$0.00
Annual Cash Flow
$0.00
Cap Rate
0.00%
Cash-on-Cash Return (ROI)
0.00%
Mastering Rental Property Analysis: Cash-on-Cash Return
Investing in real estate is one of the most reliable ways to build wealth, but not every property is a good deal. To separate the winners from the losers, investors rely on specific metrics. While the Cap Rate is useful for valuing a property regardless of financing, the Cash-on-Cash Return (CoC ROI) is widely considered the most important metric for leveraged investors.
What is Cash-on-Cash Return?
Cash-on-Cash Return measures the annual pre-tax cash flow generated by the property relative to the total amount of cash invested. Unlike a standard ROI calculation that might look at the total asset value, CoC focuses purely on the efficiency of the capital you actually deployed (your down payment, closing costs, and rehab costs).
The formula is:
Cash on Cash Return = (Annual Pre-Tax Cash Flow / Total Cash Invested) × 100%
How to Use This Calculator
Our Rental Property ROI Calculator is designed to give you a comprehensive snapshot of your potential investment. Here is how to interpret the input fields:
- Purchase Information: Enter the price you are paying and the actual cash you are putting down. Include closing costs and immediate repair estimates to get an accurate "Total Cash Invested" figure.
- Loan Details: This calculates your mortgage payment (Principal & Interest). A higher interest rate drastically reduces cash flow.
- Income & Expenses: Be realistic with your rent estimates. For "Other Monthly Expenses," ensure you sum up property taxes, insurance, HOA fees, property management fees, and set aside reserves for vacancy and maintenance.
Interpreting Your Results
Positive vs. Negative Cash Flow: If your monthly cash flow is negative, you are losing money every month to hold the property. Most investors aim for at least $100-$200 per door in net positive cash flow.
What is a Good CoC Return? This varies by market and strategy, but generally:
- 8-12%: Considered a solid return in most stable markets.
- 15%+: Excellent return, often found in riskier neighborhoods or through value-add strategies (BRRRR).
- Below 5%: You might be better off investing in index funds unless the property has massive appreciation potential.
Use this tool to analyze multiple deals quickly and ensure your money works as hard as you do.