.rcr-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;
}
.rcr-calculator-card {
background: #ffffff;
border: 1px solid #e0e0e0;
border-radius: 8px;
padding: 30px;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
margin-bottom: 40px;
}
.rcr-title {
text-align: center;
color: #2c3e50;
margin-bottom: 25px;
font-size: 24px;
font-weight: 700;
}
.rcr-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
}
@media (max-width: 600px) {
.rcr-grid {
grid-template-columns: 1fr;
}
}
.rcr-input-group {
margin-bottom: 15px;
}
.rcr-label {
display: block;
margin-bottom: 5px;
font-weight: 600;
font-size: 14px;
color: #555;
}
.rcr-input-wrapper {
position: relative;
display: flex;
align-items: center;
}
.rcr-prefix, .rcr-suffix {
background: #f4f6f8;
padding: 10px 15px;
border: 1px solid #ddd;
color: #666;
font-weight: bold;
}
.rcr-prefix {
border-right: none;
border-radius: 4px 0 0 4px;
}
.rcr-suffix {
border-left: none;
border-radius: 0 4px 4px 0;
}
.rcr-input {
width: 100%;
padding: 10px;
border: 1px solid #ddd;
font-size: 16px;
border-radius: 4px;
outline: none;
transition: border-color 0.2s;
}
.rcr-input.has-prefix {
border-radius: 0 4px 4px 0;
}
.rcr-input.has-suffix {
border-radius: 4px 0 0 4px;
}
.rcr-input:focus {
border-color: #3498db;
}
.rcr-btn {
width: 100%;
padding: 15px;
background-color: #27ae60;
color: white;
border: none;
border-radius: 4px;
font-size: 18px;
font-weight: bold;
cursor: pointer;
margin-top: 20px;
transition: background-color 0.2s;
}
.rcr-btn:hover {
background-color: #219150;
}
.rcr-results-area {
margin-top: 30px;
padding: 20px;
background-color: #f8f9fa;
border-radius: 6px;
border-left: 5px solid #27ae60;
display: none;
}
.rcr-result-row {
display: flex;
justify-content: space-between;
margin-bottom: 10px;
font-size: 15px;
}
.rcr-result-row.total {
border-top: 2px solid #ddd;
padding-top: 10px;
margin-top: 10px;
font-weight: bold;
font-size: 18px;
color: #2c3e50;
}
.rcr-highlight {
color: #27ae60;
}
.rcr-content h2 {
color: #2c3e50;
border-bottom: 2px solid #eee;
padding-bottom: 10px;
margin-top: 30px;
}
.rcr-content p {
margin-bottom: 15px;
}
.rcr-content ul {
margin-bottom: 20px;
padding-left: 20px;
}
.rcr-content li {
margin-bottom: 8px;
}
.rcr-tooltip {
font-size: 12px;
color: #7f8c8d;
margin-top: 4px;
}
function calculateRentalCapRate() {
// 1. Get Input Values
var propertyValue = parseFloat(document.getElementById('rcr_property_value').value);
var monthlyRent = parseFloat(document.getElementById('rcr_monthly_rent').value);
var annualExpenses = parseFloat(document.getElementById('rcr_annual_expenses').value);
var vacancyRate = parseFloat(document.getElementById('rcr_vacancy_rate').value);
// 2. Validate Inputs
if (isNaN(propertyValue) || propertyValue <= 0) {
alert("Please enter a valid Property Value.");
return;
}
if (isNaN(monthlyRent) || monthlyRent < 0) {
alert("Please enter a valid Monthly Rent.");
return;
}
if (isNaN(annualExpenses) || annualExpenses < 0) {
annualExpenses = 0; // Default to 0 if empty
}
if (isNaN(vacancyRate) || vacancyRate < 0) {
vacancyRate = 0; // Default to 0 if empty
}
// 3. Perform Calculations
// Calculate Gross Annual Income
var grossAnnualIncome = monthlyRent * 12;
// Calculate Vacancy Loss (Money lost due to empty unit)
var vacancyLoss = grossAnnualIncome * (vacancyRate / 100);
// Calculate Effective Gross Income
var effectiveGrossIncome = grossAnnualIncome – vacancyLoss;
// Calculate Net Operating Income (NOI)
var noi = effectiveGrossIncome – annualExpenses;
// Calculate Cap Rate
// Formula: (NOI / Property Value) * 100
var capRate = (noi / propertyValue) * 100;
// 4. Update UI
document.getElementById('rcr_result_container').style.display = 'block';
// Helper function for currency formatting
var formatter = new Intl.NumberFormat('en-US', {
style: 'currency',
currency: 'USD',
minimumFractionDigits: 2
});
document.getElementById('rcr_display_gross').innerText = formatter.format(grossAnnualIncome);
document.getElementById('rcr_display_vacancy').innerText = "-" + formatter.format(vacancyLoss);
document.getElementById('rcr_display_expenses').innerText = "-" + formatter.format(annualExpenses);
document.getElementById('rcr_display_noi').innerText = formatter.format(noi);
// Format Cap Rate
document.getElementById('rcr_display_cap_rate').innerText = capRate.toFixed(2) + "%";
// Optional: Change color if negative NOI
if (noi < 0) {
document.getElementById('rcr_display_noi').style.color = "#c0392b";
} else {
document.getElementById('rcr_display_noi').style.color = "#2c3e50";
}
}
Rental Property Cap Rate Calculator
$
$
$
Incl. taxes, insurance, maintenance, HOA, management.
%
Gross Annual Income:
$0.00
– Vacancy Loss:
$0.00
– Operating Expenses:
$0.00
Net Operating Income (NOI):
$0.00
Capitalization Rate:
0.00%
What is a Rent Cap Rate Calculator?
The Rental Property Capitalization Rate (Cap Rate) Calculator is an essential tool for real estate investors to evaluate the profitability of an investment property independent of financing. It measures the rate of return on the property based on the income the property is expected to generate.
Unlike a mortgage calculator which focuses on your monthly payments, the Cap Rate calculator focuses purely on the property's efficiency at generating revenue compared to its market value.
How to Calculate Cap Rate
The formula used in this calculator is the industry standard for evaluating rental performance:
Cap Rate = (Net Operating Income / Current Market Value) × 100
To derive the Net Operating Income (NOI), we follow these steps:
- Gross Annual Income: Monthly Rent × 12.
- Effective Gross Income: Gross Annual Income minus vacancy losses.
- Net Operating Income (NOI): Effective Gross Income minus all annual operating expenses (taxes, insurance, maintenance, etc.).
What is a Good Cap Rate?
There is no single "correct" Cap Rate, as it varies significantly by location and asset class. However, generally speaking:
- 4% – 5%: Common in high-demand, low-risk areas (like major city centers). These properties appreciate well but offer lower immediate cash flow.
- 6% – 8%: Often considered a healthy balance between risk and return for residential rental properties.
- 8% – 10%+: Found in riskier markets or older properties requiring more maintenance. These offer high cash flow but may have lower appreciation potential or higher tenant turnover.
Why Exclude Mortgage Payments?
You may notice this calculator does not ask for interest rates or mortgage details. This is intentional. The Cap Rate is a measure of the property's performance, not your financing structure.
If you want to calculate your return based on the cash you actually invested (including your down payment and loan), you should look for a Cash-on-Cash Return calculator instead.