Deciding whether to lease or buy your next vehicle is a significant financial decision. Each option has distinct advantages and disadvantages depending on your driving habits, budget, and how long you plan to keep the car.
Understanding Vehicle Leasing
Leasing is essentially "renting" a car for a fixed period (usually 24 to 48 months). You are only paying for the vehicle's depreciation during the time you drive it, plus interest (known as the money factor) and fees.
Pros: Lower monthly payments, always driving a newer car with the latest tech, vehicle is usually under factory warranty.
Cons: Mileage limits (typically 10,000–15,000 miles/year), no equity at the end of the term, potential wear-and-tear charges.
Understanding Vehicle Financing (Buying)
When you buy a car with a loan, you are paying for the entire cost of the vehicle. Once the loan is paid off, you own the asset outright.
Pros: No mileage restrictions, you build equity, freedom to customize or sell the car at any time, no payments once the loan is finished.
Cons: Higher monthly payments, higher down payment usually required, out-of-pocket repair costs after warranty expires.
Calculation Example
Let's look at a realistic scenario for a $35,000 SUV:
Buy: With $3,000 down and a 5-year loan at 6.5%, your payment is roughly $625/month. Total interest paid over 5 years is about $5,500.
Lease: With $3,000 down for a 3-year lease and a 60% residual value, your payment might be closer to $410/month.
In this example, the lease saves you over $200 per month in cash flow, but at the end of 3 years, you have nothing. After 5 years of buying, you own a car that might still be worth $18,000.
Key Factors to Consider
Annual Mileage: If you drive more than 15,000 miles a year, buying is almost always better to avoid heavy per-mile penalties.
Retention: Do you like a new car every 3 years? Lease. Do you keep cars until the wheels fall off? Buy.
Business Use: Leases often offer better tax write-offs for business owners and self-employed individuals.
function calculateCarFinance() {
// Get Input Values
var carPrice = parseFloat(document.getElementById('carPrice').value);
var downPayment = parseFloat(document.getElementById('downPayment').value);
// Lease Inputs
var leaseTerm = parseFloat(document.getElementById('leaseTerm').value);
var leaseAPR = parseFloat(document.getElementById('moneyFactor').value);
var residualPercent = parseFloat(document.getElementById('residualValue').value) / 100;
var leaseFees = parseFloat(document.getElementById('leaseFees').value);
// Loan Inputs
var loanTerm = parseFloat(document.getElementById('loanTerm').value);
var loanRate = parseFloat(document.getElementById('loanRate').value) / 100 / 12;
// Validation
if (isNaN(carPrice) || isNaN(downPayment) || carPrice 0) {
monthlyLoan = (loanAmount * loanRate) / (1 – Math.pow(1 + loanRate, -loanTerm));
} else {
monthlyLoan = loanAmount / loanTerm;
}
var totalLoanPayments = monthlyLoan * loanTerm;
var totalInterest = totalLoanPayments – loanAmount;
// Display Results
document.getElementById('resultContainer').style.display = 'block';
document.getElementById('monthlyLease').innerText = '$' + monthlyLease.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('totalLeaseCost').innerText = '$' + totalLeaseCost.toLocaleString(undefined, {maximumFractionDigits: 0});
document.getElementById('monthlyLoan').innerText = '$' + monthlyLoan.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('totalLoanInterest').innerText = '$' + totalInterest.toLocaleString(undefined, {maximumFractionDigits: 0});
// Summary Text
var diff = Math.abs(monthlyLoan – monthlyLease);
var cheaper = (monthlyLease < monthlyLoan) ? "Leasing" : "Buying";
document.getElementById('comparisonText').innerText = cheaper + " is $" + diff.toLocaleString(undefined, {maximumFractionDigits: 2}) + " cheaper per month in the short term.";
// Smooth scroll to results
document.getElementById('resultContainer').scrollIntoView({ behavior: 'smooth', block: 'nearest' });
}