.calculator-wrapper {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
max-width: 800px;
margin: 0 auto;
background: #fff;
padding: 20px;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}
.calc-header {
text-align: center;
margin-bottom: 30px;
color: #2c3e50;
}
.calc-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
}
@media (max-width: 600px) {
.calc-grid {
grid-template-columns: 1fr;
}
}
.input-group {
margin-bottom: 15px;
}
.input-group label {
display: block;
margin-bottom: 5px;
font-weight: 600;
font-size: 0.9em;
color: #555;
}
.input-group input {
width: 100%;
padding: 10px;
border: 1px solid #ddd;
border-radius: 4px;
box-sizing: border-box;
font-size: 1em;
}
.input-group input:focus {
border-color: #3498db;
outline: none;
}
.section-title {
grid-column: 1 / -1;
font-size: 1.1em;
color: #3498db;
border-bottom: 2px solid #eee;
padding-bottom: 10px;
margin-top: 10px;
margin-bottom: 15px;
font-weight: bold;
}
.btn-calc {
grid-column: 1 / -1;
background: #27ae60;
color: white;
border: none;
padding: 15px;
font-size: 1.1em;
border-radius: 4px;
cursor: pointer;
transition: background 0.3s;
margin-top: 20px;
}
.btn-calc:hover {
background: #219150;
}
.results-section {
margin-top: 30px;
background: #f8f9fa;
padding: 20px;
border-radius: 8px;
border-left: 5px solid #27ae60;
display: none;
}
.result-row {
display: flex;
justify-content: space-between;
padding: 10px 0;
border-bottom: 1px solid #eee;
}
.result-row.total {
font-weight: bold;
font-size: 1.2em;
color: #2c3e50;
border-bottom: none;
margin-top: 10px;
}
.result-value {
font-weight: bold;
}
.positive { color: #27ae60; }
.negative { color: #c0392b; }
/* SEO Content Styles */
.seo-content {
margin-top: 50px;
line-height: 1.6;
color: #444;
}
.seo-content h2 { color: #2c3e50; margin-top: 30px; }
.seo-content h3 { color: #34495e; margin-top: 20px; }
.seo-content ul { padding-left: 20px; }
.seo-content li { margin-bottom: 10px; }
function calculateCashFlow() {
// Get inputs
var price = parseFloat(document.getElementById('purchasePrice').value) || 0;
var downPercent = parseFloat(document.getElementById('downPayment').value) || 0;
var interestRate = parseFloat(document.getElementById('interestRate').value) || 0;
var loanTerm = parseFloat(document.getElementById('loanTerm').value) || 0;
var closingCosts = parseFloat(document.getElementById('closingCosts').value) || 0;
var repairCosts = parseFloat(document.getElementById('repairCosts').value) || 0;
var monthlyRent = parseFloat(document.getElementById('monthlyRent').value) || 0;
var vacancyRate = parseFloat(document.getElementById('vacancyRate').value) || 0;
var propertyTaxYear = parseFloat(document.getElementById('propertyTax').value) || 0;
var insuranceYear = parseFloat(document.getElementById('insurance').value) || 0;
var hoaFee = parseFloat(document.getElementById('hoaFee').value) || 0;
var maintenanceRate = parseFloat(document.getElementById('maintenance').value) || 0;
// Calculations
var downPaymentAmount = price * (downPercent / 100);
var loanAmount = price – downPaymentAmount;
var totalCashInvested = downPaymentAmount + closingCosts + repairCosts;
// Mortgage P&I
var monthlyRate = (interestRate / 100) / 12;
var numberOfPayments = loanTerm * 12;
var monthlyMortgage = 0;
if (interestRate > 0) {
monthlyMortgage = loanAmount * (monthlyRate * Math.pow(1 + monthlyRate, numberOfPayments)) / (Math.pow(1 + monthlyRate, numberOfPayments) – 1);
} else {
monthlyMortgage = loanAmount / numberOfPayments;
}
// Monthly Expenses
var vacancyCost = monthlyRent * (vacancyRate / 100);
var maintenanceCost = monthlyRent * (maintenanceRate / 100);
var monthlyTax = propertyTaxYear / 12;
var monthlyInsurance = insuranceYear / 12;
var totalOperatingExpenses = vacancyCost + maintenanceCost + monthlyTax + monthlyInsurance + hoaFee;
var totalExpensesWithMortgage = totalOperatingExpenses + monthlyMortgage;
// Income Metrics
var noiMonthly = monthlyRent – totalOperatingExpenses;
var monthlyCashFlow = noiMonthly – monthlyMortgage;
var annualCashFlow = monthlyCashFlow * 12;
var annualNOI = noiMonthly * 12;
// Returns
var cocReturn = 0;
if (totalCashInvested > 0) {
cocReturn = (annualCashFlow / totalCashInvested) * 100;
}
var capRate = 0;
if (price > 0) {
capRate = (annualNOI / price) * 100;
}
// Display Results
document.getElementById('resTotalInvestment').innerText = formatCurrency(totalCashInvested);
document.getElementById('resMortgage').innerText = formatCurrency(monthlyMortgage);
document.getElementById('resTotalExpenses').innerText = formatCurrency(totalExpensesWithMortgage);
document.getElementById('resNOI').innerText = formatCurrency(noiMonthly);
var cashFlowElem = document.getElementById('resMonthlyCashFlow');
cashFlowElem.innerText = formatCurrency(monthlyCashFlow);
cashFlowElem.className = 'result-value ' + (monthlyCashFlow >= 0 ? 'positive' : 'negative');
var cocElem = document.getElementById('resCoC');
cocElem.innerText = cocReturn.toFixed(2) + '%';
cocElem.className = 'result-value ' + (cocReturn >= 0 ? 'positive' : 'negative');
document.getElementById('resCapRate').innerText = capRate.toFixed(2) + '%';
// Show results section
document.getElementById('resultsArea').style.display = 'block';
}
function formatCurrency(num) {
return '$' + num.toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,');
}
Rental Property Cash Flow Calculator
Analyze the profitability of your real estate investment instantly.
Purchase & Loan Details
Income & Expenses (Monthly)
Investment Analysis
Total Initial Investment (Cash Needed):
$0.00
Monthly Mortgage Payment (P&I):
$0.00
Total Monthly Expenses (incl. Mortgage):
$0.00
Net Operating Income (NOI – Monthly):
$0.00
Monthly Cash Flow:
$0.00
Cash on Cash Return (Annual):
0.00%
Cap Rate:
0.00%
Understanding Rental Property Cash Flow
Investing in real estate is a powerful way to build wealth, but the numbers must make sense. Our Rental Property Cash Flow Calculator helps investors determine if a specific property will generate positive income (cash flow) or become a financial liability.
What is Cash Flow?
Cash flow is the net amount of cash moving into and out of a business. For a rental property, it is calculated by subtracting all operating expenses and debt service (mortgage payments) from the gross rental income.
Formula: Cash Flow = Gross Rent – (Operating Expenses + Mortgage Payment)
Key Metrics Explained
- NOI (Net Operating Income): This represents the profitability of the property before factoring in the mortgage. It is equal to Total Income minus Operating Expenses (excluding debt service).
- Cash on Cash Return (CoC): This is arguably the most important metric for investors. It measures the annual return on the actual cash invested (Down Payment + Closing Costs + Rehab). A CoC return of 8-12% is generally considered good for rental properties.
- Cap Rate: The Capitalization Rate indicates the rate of return on a real estate investment property based on the income that the property is expected to generate, assuming the property was bought with cash.
Common Expenses Often Overlooked
When calculating rental profitability, many beginners only subtract the mortgage from the rent. To get an accurate picture, you must account for:
- Vacancy: Properties won't be rented 365 days a year. Budgeting 5-8% helps cover turnover periods.
- Maintenance & CapEx: Roofs leak and water heaters break. Setting aside 10-15% of rent ensures you have funds for repairs.
- Property Management: Even if you self-manage, you should account for your time or the potential future cost of a manager (typically 8-10% of rent).
How to Use This Calculator
Input your purchase details, financing terms, and expected rental income. Be realistic with your expense estimates. The calculator will provide your estimated monthly cash flow and your annual return on investment. If the cash flow is negative, the property may not be a viable investment unless you adjust your offer price or increase the down payment.