.lease-calc-container {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
max-width: 800px;
margin: 20px auto;
padding: 25px;
border: 1px solid #e0e0e0;
border-radius: 12px;
background-color: #ffffff;
box-shadow: 0 4px 20px rgba(0,0,0,0.08);
color: #333;
}
.lease-calc-header {
text-align: center;
margin-bottom: 30px;
}
.lease-calc-header h2 {
color: #1a73e8;
margin-bottom: 10px;
}
.lease-calc-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
margin-bottom: 25px;
}
.lease-input-group {
display: flex;
flex-direction: column;
}
.lease-input-group label {
font-weight: 600;
margin-bottom: 8px;
font-size: 14px;
color: #555;
}
.lease-input-group input {
padding: 12px;
border: 1px solid #ccc;
border-radius: 6px;
font-size: 16px;
outline: none;
transition: border-color 0.3s;
}
.lease-input-group input:focus {
border-color: #1a73e8;
}
.lease-calc-btn {
grid-column: span 2;
background-color: #1a73e8;
color: white;
border: none;
padding: 15px;
font-size: 18px;
font-weight: bold;
border-radius: 6px;
cursor: pointer;
transition: background-color 0.3s;
}
.lease-calc-btn:hover {
background-color: #1557b0;
}
.lease-results {
margin-top: 30px;
padding: 20px;
background-color: #f8f9fa;
border-radius: 8px;
display: none;
}
.lease-result-row {
display: flex;
justify-content: space-between;
padding: 10px 0;
border-bottom: 1px solid #eee;
}
.lease-result-row:last-child {
border-bottom: none;
}
.lease-result-label {
font-weight: 500;
}
.lease-result-value {
font-weight: bold;
color: #1a73e8;
}
.lease-total-payment {
font-size: 24px;
color: #d93025;
text-align: center;
margin-top: 15px;
padding-top: 15px;
border-top: 2px solid #e0e0e0;
}
.lease-info-section {
margin-top: 40px;
line-height: 1.6;
}
.lease-info-section h3 {
color: #333;
border-left: 4px solid #1a73e8;
padding-left: 15px;
margin-top: 25px;
}
@media (max-width: 600px) {
.lease-calc-grid {
grid-template-columns: 1fr;
}
.lease-calc-btn {
grid-column: 1;
}
}
MSRP / Agreed Price ($)
Down Payment ($)
Trade-in Allowance ($)
Lease Term (Months)
Residual Value (%)
Money Factor (e.g. 0.00125)
Sales Tax (%)
Acquisition Fees ($)
Calculate Monthly Payment
Net Capitalized Cost:
$0.00
Residual Value:
$0.00
Monthly Depreciation:
$0.00
Monthly Finance Charge:
$0.00
Monthly Sales Tax:
$0.00
Estimated Monthly Payment: $0.00
How Car Lease Payments are Calculated
Unlike a standard car loan, a lease payment is primarily based on the depreciation of the vehicle over the term of the lease. Here is the breakdown of the three main components:
1. Depreciation Fee
This covers the loss in value of the car while you drive it. It is calculated by taking the Net Capitalized Cost (the price you negotiated plus fees, minus your down payment) and subtracting the Residual Value (what the car is worth at the end of the lease). This total depreciation is then divided by the number of months in the lease term.
2. Finance Fee (Money Factor)
This is the interest you pay on the lease. In leasing, interest is expressed as a Money Factor . To find the equivalent APR, multiply the Money Factor by 2400. The monthly finance fee is calculated by adding the Net Capitalized Cost to the Residual Value and multiplying that sum by the Money Factor.
3. Sales Tax
In most states, sales tax is applied to each monthly payment. Some states require the tax to be paid upfront on the total of all lease payments, but this calculator uses the standard monthly application.
Lease Example: $35,000 SUV
If you lease an SUV with an MSRP of $35,000, a residual value of 60% ($21,000), and a 36-month term with a 0.00125 money factor (approx. 3% APR):
Monthly Depreciation: ($35,000 – $21,000) / 36 = $388.89Monthly Finance Fee: ($35,000 + $21,000) * 0.00125 = $70.00Base Payment: $458.89Total with 7% Tax: $491.01
Key Leasing Terms to Know
MSRP: The Manufacturer's Suggested Retail Price. You can often negotiate this lower.Residual Value: The projected value of the car at the end of the lease. A higher residual value usually means a lower monthly payment.Capitalized Cost Reduction: This is essentially your down payment, trade-in, or rebates that lower the amount being financed.Money Factor: The lease interest rate. Look for decimals like 0.00125 or 0.00200.
function calculateLease() {
var carPrice = parseFloat(document.getElementById('carPrice').value) || 0;
var downPayment = parseFloat(document.getElementById('downPayment').value) || 0;
var tradeIn = parseFloat(document.getElementById('tradeIn').value) || 0;
var term = parseFloat(document.getElementById('leaseTerm').value) || 1;
var residualPercent = parseFloat(document.getElementById('residualPercent').value) || 0;
var moneyFactor = parseFloat(document.getElementById('moneyFactor').value) || 0;
var salesTax = parseFloat(document.getElementById('salesTax').value) || 0;
var acqFee = parseFloat(document.getElementById('acquisitionFee').value) || 0;
// 1. Calculate Gross Cap Cost
var grossCapCost = carPrice + acqFee;
// 2. Calculate Net Cap Cost
var netCapCost = grossCapCost – downPayment – tradeIn;
if (netCapCost < 0) netCapCost = 0;
// 3. Calculate Residual Value
var residualValue = carPrice * (residualPercent / 100);
// 4. Monthly Depreciation
var monthlyDepreciation = (netCapCost – residualValue) / term;
if (monthlyDepreciation < 0) monthlyDepreciation = 0;
// 5. Monthly Finance Fee
// Formula: (Net Cap Cost + Residual Value) * Money Factor
var monthlyFinance = (netCapCost + residualValue) * moneyFactor;
// 6. Base Payment
var basePayment = monthlyDepreciation + monthlyFinance;
// 7. Monthly Tax
var monthlyTax = basePayment * (salesTax / 100);
// 8. Total Payment
var totalMonthly = basePayment + monthlyTax;
// Display Results
document.getElementById('resNetCapCost').innerText = '$' + netCapCost.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resResidualValue').innerText = '$' + residualValue.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resMonthlyDep').innerText = '$' + monthlyDepreciation.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resMonthlyFinance').innerText = '$' + monthlyFinance.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resMonthlyTax').innerText = '$' + monthlyTax.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resTotalPayment').innerText = '$' + totalMonthly.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('leaseResults').style.display = 'block';
}