.calculator-wrapper {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
background: #fff;
padding: 20px;
border-radius: 8px;
box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.calc-header {
text-align: center;
margin-bottom: 30px;
}
.calc-header h2 {
color: #2c3e50;
margin-bottom: 10px;
}
.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;
color: #444;
}
.input-group input {
width: 100%;
padding: 10px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 16px;
box-sizing: border-box;
}
.input-group input:focus {
border-color: #3498db;
outline: none;
}
.section-title {
grid-column: 1 / -1;
font-size: 18px;
border-bottom: 2px solid #eee;
padding-bottom: 10px;
margin-top: 10px;
margin-bottom: 15px;
color: #2980b9;
}
button.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;
}
button.calc-btn:hover {
background-color: #219150;
}
.results-section {
grid-column: 1 / -1;
background-color: #f8f9fa;
padding: 20px;
border-radius: 8px;
margin-top: 20px;
display: none;
border-left: 5px solid #27ae60;
}
.result-row {
display: flex;
justify-content: space-between;
margin-bottom: 10px;
font-size: 16px;
}
.result-row.highlight {
font-weight: bold;
font-size: 20px;
color: #2c3e50;
border-top: 1px solid #ddd;
padding-top: 10px;
margin-top: 10px;
}
.article-content {
margin-top: 40px;
line-height: 1.6;
color: #333;
}
.article-content h3 {
color: #2c3e50;
margin-top: 25px;
}
.error-msg {
color: #c0392b;
text-align: center;
display: none;
grid-column: 1 / -1;
}
function calculateCapRate() {
// Get Input Values
var price = parseFloat(document.getElementById('propertyPrice').value);
var rent = parseFloat(document.getElementById('monthlyRent').value);
var vacancyPct = parseFloat(document.getElementById('vacancyRate').value);
var tax = parseFloat(document.getElementById('propertyTax').value) || 0;
var insurance = parseFloat(document.getElementById('insurance').value) || 0;
var maintenance = parseFloat(document.getElementById('maintenance').value) || 0;
var mgmt = parseFloat(document.getElementById('managementFee').value) || 0;
var errorDiv = document.getElementById('errorMsg');
var resultsDiv = document.getElementById('results');
// Validation
if (isNaN(price) || price <= 0 || isNaN(rent) || rent <= 0) {
errorDiv.style.display = 'block';
resultsDiv.style.display = 'none';
return;
} else {
errorDiv.style.display = 'none';
}
// Calculations
var grossAnnualIncome = rent * 12;
var vacancyLoss = grossAnnualIncome * (vacancyPct / 100);
if (isNaN(vacancyLoss)) vacancyLoss = 0;
var effectiveGrossIncome = grossAnnualIncome – vacancyLoss;
var totalExpenses = tax + insurance + maintenance + mgmt;
var noi = effectiveGrossIncome – totalExpenses;
var capRate = (noi / price) * 100;
// Formatting Function
var currencyFmt = new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD' });
// Output Results
document.getElementById('resGrossIncome').innerHTML = currencyFmt.format(grossAnnualIncome);
document.getElementById('resVacancy').innerHTML = currencyFmt.format(vacancyLoss);
document.getElementById('resEffectiveIncome').innerHTML = currencyFmt.format(effectiveGrossIncome);
document.getElementById('resExpenses').innerHTML = currencyFmt.format(totalExpenses);
document.getElementById('resNOI').innerHTML = currencyFmt.format(noi);
document.getElementById('resCapRate').innerHTML = capRate.toFixed(2) + '%';
// Show results
resultsDiv.style.display = 'block';
}
What is Capitalization Rate (Cap Rate)?
The Capitalization Rate, or Cap Rate, is one of the most popular metrics used in commercial and residential real estate to determine the potential return on an investment property. It represents the yield of a property over a one-year time horizon, assuming the property is purchased with cash (without financing).
The Cap Rate Formula
The formula for calculating Cap Rate is relatively simple, yet it requires accurate data regarding income and expenses:
Cap Rate = (Net Operating Income / Current Market Value) × 100
Net Operating Income (NOI) is calculated by subtracting all operating expenses (taxes, insurance, maintenance, management fees) from the effective gross income. Note that mortgage payments are not included in NOI.
Example Calculation
Let's say you are looking to buy a rental property for $250,000. Here is how the numbers might break down:
- Gross Income: $2,000 rent/month × 12 = $24,000/year
- Vacancy (5%): $1,200
- Operating Expenses: $7,800 (Taxes, Insurance, Repairs)
First, calculate the NOI:
$24,000 (Income) – $1,200 (Vacancy) – $7,800 (Expenses) = $15,000 NOI.
Next, divide by the Purchase Price:
$15,000 / $250,000 = 0.06 or 6.00% Cap Rate.
What is a "Good" Cap Rate?
A "good" cap rate is subjective and depends heavily on the location of the property and the risk level of the asset class. Generally, a higher cap rate implies a higher return but also higher risk (e.g., a property in a declining neighborhood). Conversely, a lower cap rate often implies a safer, more stable investment (e.g., a Class A building in a city center).
- 4% – 5%: Common in high-demand, low-risk metropolitan areas.
- 6% – 8%: Typically considered a healthy balance of risk and return for residential rentals.
- 8% – 12%+: Often found in riskier markets or properties requiring significant renovation.
Why Use This Calculator?
Using a Real Estate Cap Rate Calculator allows investors to quickly compare different properties on an apples-to-apples basis. By stripping away financing costs (which vary by investor), the Cap Rate focuses purely on the property's ability to generate income relative to its price.