body {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
line-height: 1.6;
color: #333;
margin: 0;
padding: 0;
}
.calculator-container {
max-width: 800px;
margin: 40px auto;
padding: 20px;
background: #f9f9f9;
border: 1px solid #e0e0e0;
border-radius: 8px;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.calculator-header {
text-align: center;
margin-bottom: 30px;
}
.calculator-header h1 {
color: #2c3e50;
margin-bottom: 10px;
}
.input-group {
margin-bottom: 20px;
background: #fff;
padding: 15px;
border-radius: 5px;
border: 1px solid #ddd;
}
.input-group label {
display: block;
font-weight: 600;
margin-bottom: 8px;
color: #555;
}
.input-group input {
width: 100%;
padding: 12px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 16px;
box-sizing: border-box;
}
.input-group .help-text {
font-size: 0.85em;
color: #777;
margin-top: 5px;
}
.calc-btn {
display: block;
width: 100%;
padding: 15px;
background-color: #27ae60;
color: white;
border: none;
border-radius: 4px;
font-size: 18px;
font-weight: bold;
cursor: pointer;
transition: background-color 0.3s;
}
.calc-btn:hover {
background-color: #219150;
}
#result-area {
margin-top: 30px;
padding: 20px;
background-color: #fff;
border-left: 5px solid #27ae60;
display: none;
box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.result-row {
display: flex;
justify-content: space-between;
margin-bottom: 10px;
padding-bottom: 10px;
border-bottom: 1px solid #eee;
}
.result-row:last-child {
border-bottom: none;
margin-bottom: 0;
padding-bottom: 0;
}
.result-label {
font-weight: 600;
color: #444;
}
.result-value {
font-weight: bold;
color: #2c3e50;
font-size: 1.2em;
}
.error-msg {
color: #c0392b;
font-weight: bold;
text-align: center;
margin-top: 10px;
display: none;
}
.article-section {
max-width: 800px;
margin: 50px auto;
padding: 0 20px;
}
.article-section h2 {
color: #2c3e50;
border-bottom: 2px solid #eee;
padding-bottom: 10px;
margin-top: 40px;
}
.article-section p {
margin-bottom: 20px;
font-size: 1.1em;
}
.article-section ul {
margin-bottom: 20px;
}
.article-section li {
margin-bottom: 10px;
}
.highlight-box {
background-color: #e8f6f3;
padding: 15px;
border-radius: 5px;
border-left: 4px solid #27ae60;
margin: 20px 0;
}
function calculateRetentionRate() {
// 1. Get input elements
var expiringInput = document.getElementById("expiringLeases");
var renewedInput = document.getElementById("renewedLeases");
var errorDiv = document.getElementById("error-message");
var resultDiv = document.getElementById("result-area");
// 2. Parse values
var expiring = parseInt(expiringInput.value);
var renewed = parseInt(renewedInput.value);
// 3. Reset display
errorDiv.style.display = "none";
resultDiv.style.display = "none";
// 4. Validation
if (isNaN(expiring) || isNaN(renewed)) {
errorDiv.innerHTML = "Please enter valid numbers for both fields.";
errorDiv.style.display = "block";
return;
}
if (expiring <= 0) {
errorDiv.innerHTML = "Total Leases Expiring must be greater than zero.";
errorDiv.style.display = "block";
return;
}
if (renewed expiring) {
errorDiv.innerHTML = "Renewed leases cannot exceed the number of expiring leases.";
errorDiv.style.display = "block";
return;
}
// 5. Calculation Logic
var retentionRate = (renewed / expiring) * 100;
var turnoverRate = 100 – retentionRate;
var moveOuts = expiring – renewed;
// 6. Display Results
document.getElementById("retentionResult").innerHTML = retentionRate.toFixed(1) + "%";
document.getElementById("turnoverResult").innerHTML = turnoverRate.toFixed(1) + "%";
document.getElementById("moveOutsResult").innerHTML = moveOuts;
resultDiv.style.display = "block";
}
Understanding Tenant Retention Rate
Tenant Retention Rate is a critical Key Performance Indicator (KPI) for property managers, landlords, and real estate investors. It measures the percentage of tenants who choose to renew their lease at the end of their term rather than moving out. A high retention rate generally signals tenant satisfaction, effective property management, and stable rental income.
Maintaining a high retention rate is often more cost-effective than acquiring new tenants. The costs associated with turnover—such as cleaning, repairs, marketing, leasing commissions, and vacancy loss—can significantly impact the Net Operating Income (NOI) of a rental property.
How to Calculate Tenant Retention
The formula for calculating tenant retention is straightforward. It focuses specifically on the pool of tenants who had the opportunity to leave (i.e., their lease expired) versus those who chose to stay.
Formula:
(Number of Renewals / Number of Expiring Leases) × 100 = Retention Rate %
Conversely, the Turnover Rate is the inverse of the retention rate:
Formula:
100% – Retention Rate % = Turnover Rate %
Example Calculation
Imagine you manage an apartment complex. Over the last year, 20 leases were set to expire. Out of those 20 tenants:
- 16 tenants signed a lease renewal.
- 4 tenants decided to move out.
Using the calculator above or the formula:
(16 ÷ 20) = 0.80
0.80 × 100 = 80% Retention Rate
This means you successfully retained 80% of your residents, resulting in a turnover rate of 20%.
Why This Metric Matters
Tracking this metric helps landlords identify trends in their portfolio. If retention rates suddenly drop, it may indicate issues such as:
- Above-market rent increases.
- Decline in maintenance quality.
- Poor communication from management.
- Better amenities offered by competitors.
Strategies to Improve Retention
To boost your numbers calculated by this tool, consider the following strategies:
- Proactive Communication: Approach tenants 90 days before lease expiration to discuss renewal options.
- Maintenance Responsiveness: Respond to and fix maintenance requests quickly. This is often the #1 factor in a tenant's decision to stay.
- Renewal Incentives: Offer small upgrades (like carpet cleaning, fresh paint, or a fixture upgrade) upon renewal instead of just raising the rent.
- Community Building: For multi-family properties, fostering a sense of community can make it harder for tenants to want to leave.