/* Calculator Styles */
.calc-container {
max-width: 800px;
margin: 20px auto;
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background: #f9f9f9;
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0,0,0,0.1);
color: #333;
}
.calc-header {
text-align: center;
margin-bottom: 30px;
}
.calc-header h2 {
color: #2c3e50;
margin: 0;
}
.calc-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
}
@media (max-width: 600px) {
.calc-grid {
grid-template-columns: 1fr;
}
}
.form-group {
margin-bottom: 15px;
}
.form-group label {
display: block;
margin-bottom: 5px;
font-weight: 600;
font-size: 0.9em;
}
.form-group input {
width: 100%;
padding: 10px;
border: 1px solid #ddd;
border-radius: 4px;
box-sizing: border-box;
font-size: 16px;
}
.form-group input:focus {
border-color: #3498db;
outline: none;
}
.section-title {
grid-column: 1 / -1;
font-size: 1.1em;
font-weight: bold;
color: #3498db;
margin-top: 10px;
border-bottom: 2px solid #e0e0e0;
padding-bottom: 5px;
}
.calc-btn {
grid-column: 1 / -1;
background-color: #27ae60;
color: white;
border: none;
padding: 15px;
font-size: 18px;
border-radius: 4px;
cursor: pointer;
transition: background 0.3s;
margin-top: 10px;
font-weight: bold;
}
.calc-btn:hover {
background-color: #219150;
}
.results-box {
grid-column: 1 / -1;
background: #fff;
padding: 20px;
border-radius: 4px;
border-left: 5px solid #2c3e50;
margin-top: 20px;
display: none; /* Hidden by default */
}
.result-row {
display: flex;
justify-content: space-between;
padding: 8px 0;
border-bottom: 1px solid #eee;
}
.result-row.highlight {
font-weight: bold;
color: #2c3e50;
font-size: 1.1em;
border-bottom: none;
padding-top: 15px;
}
.positive { color: #27ae60; }
.negative { color: #c0392b; }
/* Article Content Styles */
.content-section {
max-width: 800px;
margin: 40px auto;
font-family: 'Georgia', serif;
line-height: 1.6;
color: #444;
}
.content-section h2 {
font-family: 'Segoe UI', sans-serif;
color: #2c3e50;
margin-top: 30px;
}
.content-section p {
margin-bottom: 15px;
}
.content-section ul {
margin-bottom: 20px;
}
.content-section li {
margin-bottom: 8px;
}
function calculateCashFlow() {
// 1. Get Inputs
var price = parseFloat(document.getElementById('purchasePrice').value) || 0;
var downPmt = parseFloat(document.getElementById('downPayment').value) || 0;
var rate = parseFloat(document.getElementById('interestRate').value) || 0;
var years = parseFloat(document.getElementById('loanTerm').value) || 0;
var closing = parseFloat(document.getElementById('closingCosts').value) || 0;
var initialRepairs = parseFloat(document.getElementById('repairCosts').value) || 0;
var rent = parseFloat(document.getElementById('monthlyRent').value) || 0;
var taxAnnual = parseFloat(document.getElementById('propTax').value) || 0;
var insAnnual = parseFloat(document.getElementById('insurance').value) || 0;
var hoa = parseFloat(document.getElementById('hoa').value) || 0;
var maintPercent = parseFloat(document.getElementById('maintenance').value) || 0;
var vacancyPercent = parseFloat(document.getElementById('vacancy').value) || 0;
// 2. Validate essential inputs
if (price <= 0 || years 0) {
cocRoi = (annualCashFlow / totalInvested) * 100;
}
var capRate = 0;
if (price > 0) {
capRate = (noi / price) * 100;
}
// 6. Display Results
document.getElementById('resMortgage').innerText = "$" + mortgage.toFixed(2);
document.getElementById('resExpenses').innerText = "$" + totalMonthlyExpenses.toFixed(2);
document.getElementById('resNOI').innerText = "$" + (noi / 12).toFixed(2); // Monthly NOI display
var cfElement = document.getElementById('resCashFlow');
cfElement.innerText = "$" + monthlyCashFlow.toFixed(2);
if (monthlyCashFlow >= 0) {
cfElement.className = "positive";
} else {
cfElement.className = "negative";
}
var roiElement = document.getElementById('resCocROI');
roiElement.innerText = cocRoi.toFixed(2) + "%";
if (cocRoi >= 0) {
roiElement.className = "positive";
} else {
roiElement.className = "negative";
}
document.getElementById('resCapRate').innerText = capRate.toFixed(2) + "%";
// Show the results box
document.getElementById('resultsArea').style.display = "block";
}
Understanding Rental Property Cash Flow
Investing in real estate is one of the most reliable ways to build long-term wealth, but not every property is a good investment. The difference between a profitable asset and a financial burden often comes down to one metric: Cash Flow. This Rental Property Calculator helps investors analyze deals quickly to ensure they are buying assets that produce positive monthly income.
What is Positive Cash Flow?
Cash flow is the net amount of cash moving into and out of a business or investment property. Positive cash flow occurs when a property's gross rental income exceeds all of the expenses required to own and operate it, including mortgage payments, taxes, insurance, and maintenance.
For example, if you collect $2,000 in rent, but your mortgage, taxes, and repairs cost $1,800, your positive cash flow is $200/month.
Key Metrics in This Calculator
- Cash on Cash Return (CoC ROI): This measures the annual return on the actual cash you invested (down payment + closing costs + repairs). It is arguably the most important metric for determining how hard your money is working for you.
- Net Operating Income (NOI): This is your annual income minus operating expenses, excluding mortgage payments. It is crucial for calculating the Cap Rate.
- Cap Rate (Capitalization Rate): Calculated as NOI divided by the property price. It helps compare the profitability of different properties regardless of how they are financed.
The 50% Rule and Vacancy Rates
When estimating expenses, new investors often underestimate costs. A conservative rule of thumb is the 50% Rule, which suggests that 50% of your rental income will go toward operating expenses (excluding the mortgage payment). While this calculator allows for specific inputs, it is wise to always account for:
- Vacancy: Properties will not be occupied 365 days a year. Budgeting 5% to 8% for vacancy ensures you have a buffer during turnover.
- Maintenance & CapEx: Roofs leak and water heaters break. Setting aside 5% to 10% of monthly rent for repairs prevents cash flow shock when big expenses arise.
How to Use This Tool
To get the most accurate results, input your purchase price and financing details first. Then, be realistic about your rental income and expenses. If the Monthly Cash Flow result turns red, the property is costing you money to hold. Ideally, you want a property that shows a positive "Cash on Cash ROI" higher than what you could earn in the stock market or a savings account.