.rental-calc-wrapper {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
color: #333;
line-height: 1.6;
}
.rental-calc-container {
background: #f9f9f9;
border: 1px solid #e0e0e0;
border-radius: 8px;
padding: 25px;
margin-bottom: 30px;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.calc-header {
text-align: center;
margin-bottom: 25px;
}
.calc-header h2 {
margin: 0;
color: #2c3e50;
}
.input-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
}
@media (max-width: 600px) {
.input-grid {
grid-template-columns: 1fr;
}
}
.form-group {
margin-bottom: 15px;
}
.form-group label {
display: block;
font-weight: 600;
margin-bottom: 5px;
font-size: 0.9em;
color: #555;
}
.form-group input {
width: 100%;
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 16px;
box-sizing: border-box;
}
.form-group .input-icon {
position: relative;
}
.form-group .input-icon input {
padding-left: 25px;
}
.form-group .input-icon span {
position: absolute;
left: 10px;
top: 10px;
color: #777;
}
.calc-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;
}
.calc-btn:hover {
background-color: #219150;
}
.results-section {
margin-top: 30px;
background: #fff;
border: 1px solid #ddd;
border-radius: 6px;
padding: 20px;
display: none; /* Hidden by default */
}
.results-grid {
display: grid;
grid-template-columns: repeat(2, 1fr);
gap: 15px;
margin-bottom: 20px;
}
.result-item {
text-align: center;
padding: 15px;
background: #f0f8ff;
border-radius: 5px;
}
.result-item.highlight {
background: #e8f5e9;
border: 1px solid #c8e6c9;
}
.result-label {
display: block;
font-size: 0.85em;
color: #666;
margin-bottom: 5px;
text-transform: uppercase;
letter-spacing: 0.5px;
}
.result-value {
font-size: 1.4em;
font-weight: bold;
color: #2c3e50;
}
.result-value.positive { color: #27ae60; }
.result-value.negative { color: #c0392b; }
/* SEO Content Styles */
.seo-content h2 { color: #2c3e50; margin-top: 40px; border-bottom: 2px solid #eee; padding-bottom: 10px; }
.seo-content h3 { color: #34495e; margin-top: 25px; }
.seo-content ul { padding-left: 20px; }
.seo-content li { margin-bottom: 10px; }
.metric-explanation { background: #fff3cd; padding: 15px; border-left: 4px solid #ffc107; margin: 20px 0; }
function calculateRental() {
// 1. Get Input Values
var price = parseFloat(document.getElementById('rc_price').value) || 0;
var downPercent = parseFloat(document.getElementById('rc_down').value) || 0;
var interestRate = parseFloat(document.getElementById('rc_rate').value) || 0;
var termYears = parseFloat(document.getElementById('rc_term').value) || 0;
var closingCosts = parseFloat(document.getElementById('rc_closing').value) || 0;
var monthlyRent = parseFloat(document.getElementById('rc_rent').value) || 0;
var annualTax = parseFloat(document.getElementById('rc_tax').value) || 0;
var annualIns = parseFloat(document.getElementById('rc_ins').value) || 0;
var monthlyHOA = parseFloat(document.getElementById('rc_hoa').value) || 0;
var vacancyRate = parseFloat(document.getElementById('rc_vacancy').value) || 0;
var maintRate = parseFloat(document.getElementById('rc_maint').value) || 0;
// 2. Perform Calculations
// Loan Calculations
var downPayment = price * (downPercent / 100);
var loanAmount = price – downPayment;
var monthlyRate = (interestRate / 100) / 12;
var numPayments = termYears * 12;
var monthlyMortgage = 0;
if (interestRate > 0) {
monthlyMortgage = (loanAmount * monthlyRate) / (1 – Math.pow(1 + monthlyRate, -numPayments));
} else {
monthlyMortgage = loanAmount / numPayments;
}
// Expense Calculations
var monthlyTax = annualTax / 12;
var monthlyIns = annualIns / 12;
var vacancyCost = monthlyRent * (vacancyRate / 100);
var maintCost = monthlyRent * (maintRate / 100);
var totalOperatingExpensesMonthly = monthlyTax + monthlyIns + monthlyHOA + vacancyCost + maintCost;
var totalMonthlyExpenses = totalOperatingExpensesMonthly + monthlyMortgage;
// Income Calculations
var monthlyCashFlow = monthlyRent – totalMonthlyExpenses;
var annualNOI = (monthlyRent – totalOperatingExpensesMonthly) * 12;
var totalInvestment = downPayment + closingCosts;
// ROI Metrics
var cashOnCash = 0;
if (totalInvestment > 0) {
cashOnCash = ((monthlyCashFlow * 12) / totalInvestment) * 100;
}
var capRate = 0;
if (price > 0) {
capRate = (annualNOI / price) * 100;
}
// 3. Update UI
// Formatter
var fmtMoney = new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD' });
var fmtPct = new Intl.NumberFormat('en-US', { style: 'percent', minimumFractionDigits: 2 });
document.getElementById('res_cashflow').innerText = fmtMoney.format(monthlyCashFlow);
document.getElementById('res_coc').innerText = fmtPct.format(cashOnCash / 100);
document.getElementById('res_cap').innerText = fmtPct.format(capRate / 100);
document.getElementById('res_expenses').innerText = fmtMoney.format(totalMonthlyExpenses);
document.getElementById('res_noi').innerText = fmtMoney.format(annualNOI);
document.getElementById('res_mortgage').innerText = fmtMoney.format(monthlyMortgage);
document.getElementById('res_investment').innerText = fmtMoney.format(totalInvestment);
// Styling for positive/negative cashflow
var cashFlowEl = document.getElementById('res_cashflow');
if (monthlyCashFlow >= 0) {
cashFlowEl.className = "result-value positive";
} else {
cashFlowEl.className = "result-value negative";
}
// Show results container
document.getElementById('rc_results').style.display = "block";
}
Rental Property Calculator
Calculate Cash Flow, ROI, and Cap Rate
Purchase & Loan
Income & Expenses
Analysis Results
Monthly Cash Flow
$0.00
Cash on Cash Return
0.00%
Cap Rate
0.00%
Monthly Expenses
$0.00
Breakdown:
Net Operating Income (Annual): $0.00
Mortgage Payment (Monthly): $0.00
Total Cash Needed to Close: $0.00
Net Operating Income (Annual): $0.00
Mortgage Payment (Monthly): $0.00
Total Cash Needed to Close: $0.00
Understanding Rental Property Cash Flow
Investing in real estate is a powerful way to build wealth, but simply buying a property doesn't guarantee profit. The most critical metric for any buy-and-hold investor is Cash Flow. This calculator helps you determine if a potential rental property will put money in your pocket every month or become a financial burden.
How This Calculator Works
To accurately assess a rental investment, you need to look beyond the mortgage payment. This tool takes a comprehensive approach by factoring in:
- Vacancy Rate: Properties are rarely occupied 100% of the time. We typically recommend estimating 5-8% for vacancy.
- Maintenance Reserve: Roofs leak and toilets break. Setting aside 5-10% of monthly rent ensures you have funds for repairs.
- Operating Expenses: These include taxes, insurance, and HOA fees which directly reduce your Net Operating Income (NOI).
Key Metrics Defined
Cash Flow: The net profit realized each month after all expenses (operating expenses + mortgage) are paid.
Cash on Cash Return (CoC): A percentage measuring the return on the actual cash invested (down payment + closing costs). It helps compare real estate returns against stocks or bonds.
Cap Rate (Capitalization Rate): The rate of return on a real estate investment property based on the income that the property is expected to generate, calculated independently of financing.
The 1% Rule in Real Estate
A common "rule of thumb" for initial screening is the 1% rule. This suggests that the monthly rent should be at least 1% of the purchase price. For example, a $250,000 home should rent for at least $2,500/month. While not a hard rule, it is a good indicator of potential cash flow. Use the calculator above to dig deeper than simple rules of thumb.
How to Improve Cash Flow
If your calculation shows negative or low cash flow, consider these adjustments:
- Increase the Down Payment: This lowers the monthly mortgage obligation.
- Shop for Lower Insurance: Insurance rates vary significantly by provider.
- Value-Add: Can you make minor renovations to justify a higher monthly rent?
- Negotiate Purchase Price: A lower buy-in price instantly improves all ROI metrics.