.calc-container {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
max-width: 800px;
margin: 20px auto;
padding: 25px;
border: 1px solid #e0e0e0;
border-radius: 12px;
background-color: #ffffff;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.calc-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
margin-bottom: 25px;
}
.input-group {
margin-bottom: 15px;
}
.input-group label {
display: block;
font-weight: 600;
margin-bottom: 8px;
color: #333;
font-size: 14px;
}
.input-group input {
width: 100%;
padding: 12px;
border: 1px solid #ccc;
border-radius: 6px;
box-sizing: border-box;
font-size: 16px;
}
.calc-button {
background-color: #0073aa;
color: white;
padding: 15px 30px;
border: none;
border-radius: 6px;
cursor: pointer;
font-size: 18px;
font-weight: bold;
width: 100%;
transition: background-color 0.3s;
}
.calc-button:hover {
background-color: #005177;
}
#lease-result {
margin-top: 25px;
padding: 20px;
background-color: #f9f9f9;
border-radius: 8px;
display: none;
border-left: 5px solid #0073aa;
}
.result-value {
font-size: 28px;
font-weight: 800;
color: #0073aa;
margin: 10px 0;
}
.result-detail {
font-size: 14px;
color: #666;
line-height: 1.6;
}
@media (max-width: 600px) {
.calc-grid { grid-template-columns: 1fr; }
}
Auto Lease Calculator
Vehicle Price (MSRP) ($)
Down Payment ($)
Trade-in Allowance ($)
Residual Value (%)
Money Factor (e.g. 0.00125)
Lease Term (Months)
Sales Tax (%)
Calculate Monthly Payment
Estimated Monthly Payment:
Breakdown:
Monthly Depreciation:
Monthly Rent Charge:
Monthly Tax:
Total Cost of Lease:
Understanding How Your Car Lease Payment is Calculated
Leasing a vehicle can be more complex than a traditional auto loan because you aren't paying for the entire value of the car. Instead, you are paying for the depreciation that occurs while you drive it, plus a finance fee known as the Money Factor .
Key Components of a Lease
Gross Capitalized Cost: The agreed-upon price of the vehicle, including any dealer fees or add-ons.Residual Value: The estimated value of the car at the end of the lease. This is set by the leasing company. Higher residual values lead to lower monthly payments.Money Factor: This is the interest rate for the lease. To convert this to a standard APR, multiply the Money Factor by 2400. For example, 0.0015 x 2400 = 3.6% APR.Capitalized Cost Reduction: This is your down payment, trade-in value, and any manufacturer rebates that reduce the amount you need to finance.
The Lease Formula
The monthly payment consists of three parts:
Depreciation Fee: (Net Cap Cost – Residual Value) / Lease TermRent Charge: (Net Cap Cost + Residual Value) * Money FactorSales Tax: (Depreciation Fee + Rent Charge) * Tax Rate
Example Calculation
Imagine you lease a car worth $40,000 for 36 months . The residual value is 60% ($24,000). You put down $4,000, making your Net Cap Cost $36,000. Your Money Factor is 0.00125.
Monthly Depreciation: ($36,000 – $24,000) / 36 = $333.33
Monthly Rent Charge: ($36,000 + $24,000) * 0.00125 = $75.00
Subtotal: $408.33
With 7% Tax: $408.33 * 1.07 = $436.91 per month
function calculateLease() {
// Get Input Values
var msrp = parseFloat(document.getElementById("msrp").value);
var downPayment = parseFloat(document.getElementById("downPayment").value) || 0;
var tradeIn = parseFloat(document.getElementById("tradeIn").value) || 0;
var residualPercent = parseFloat(document.getElementById("residual").value);
var moneyFactor = parseFloat(document.getElementById("moneyFactor").value);
var term = parseInt(document.getElementById("leaseTerm").value);
var taxRate = parseFloat(document.getElementById("salesTax").value) / 100;
// Validate inputs
if (isNaN(msrp) || isNaN(residualPercent) || isNaN(moneyFactor) || isNaN(term) || term <= 0) {
alert("Please enter valid numeric values for all fields.");
return;
}
// Calculation Logic
var residualValue = msrp * (residualPercent / 100);
var netCapCost = msrp – downPayment – tradeIn;
// Monthly Depreciation Fee
var monthlyDepreciation = (netCapCost – residualValue) / term;
if (monthlyDepreciation < 0) monthlyDepreciation = 0;
// Monthly Rent Charge (Interest)
// Formula: (Net Cap Cost + Residual Value) * Money Factor
var monthlyRentCharge = (netCapCost + residualValue) * moneyFactor;
// Subtotal and Tax
var basePayment = monthlyDepreciation + monthlyRentCharge;
var monthlyTax = basePayment * taxRate;
var totalMonthly = basePayment + monthlyTax;
// Total Cost of Lease
var totalLeaseCost = (totalMonthly * term) + downPayment + tradeIn;
// Display Results
document.getElementById("lease-result").style.display = "block";
document.getElementById("monthlyTotal").innerText = "$" + totalMonthly.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById("depreciationPart").innerText = "$" + monthlyDepreciation.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById("rentPart").innerText = "$" + monthlyRentCharge.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById("taxPart").innerText = "$" + monthlyTax.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById("totalLeaseCost").innerText = "$" + totalLeaseCost.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
}