Estimate your vehicle's current market value and total loss over time.
Standard Sedan (15%)
Luxury Vehicle (20%)
Truck / SUV (12%)
Electric Vehicle (Tesla/Etc) (10%)
Excellent (No issues)
Good (Normal Wear)
Fair (Needs Work)
Estimated Current Value$0.00
Total Depreciation$0.00
Value Retained0%
How Car Depreciation Works
Depreciation is the difference between the amount you spent to purchase your vehicle and the amount you can get when you sell it or trade it in. For most car owners, depreciation is the single largest expense of vehicle ownership—often exceeding fuel, insurance, or maintenance costs.
The 20/15/15 Rule
On average, a new car loses approximately 20% of its value in the first year. After that initial drop, the vehicle typically depreciates at a rate of 15% per year until it reaches the end of its useful life or its "scrap value." Our calculator uses a modified declining balance formula to provide a realistic estimate based on your specific vehicle type.
Factors That Accelerate Value Loss
Mileage: The average driver covers 12,000 to 15,000 miles per year. Exceeding this significantly lowers your car's resale value.
Condition: Scratches, interior stains, or mechanical issues can increase the effective depreciation rate by 5% to 15%.
Ownership History: A vehicle with multiple previous owners generally sells for less than a one-owner car.
Market Demand: Trends like the shift toward Electric Vehicles (EVs) or the popularity of SUVs can affect how well specific models hold their value.
Real-World Example Calculation
Imagine you buy a new SUV for $40,000. Here is how the value typically breaks down over three years:
Year
Depreciation
Remaining Value
Year 1 (20% loss)
$8,000
$32,000
Year 2 (15% loss)
$4,800
$27,200
Year 3 (15% loss)
$4,080
$23,120
By the end of year three, the vehicle has lost $16,880 in value, retaining only about 58% of its original purchase price.
function calculateCarDepreciation() {
var price = document.getElementById('purchasePrice').value;
var age = document.getElementById('carAge').value;
var rate = document.getElementById('vehicleType').value;
var conditionFactor = document.getElementById('carCondition').value;
if (price === "" || age === "" || price <= 0 || age < 0) {
alert("Please enter a valid purchase price and vehicle age.");
return;
}
var purchasePrice = parseFloat(price);
var carAge = parseFloat(age);
var annualRate = parseFloat(rate);
var condition = parseFloat(conditionFactor);
var currentValue = 0;
if (carAge === 0) {
currentValue = purchasePrice;
} else {
// First year depreciation is usually higher (20% average or type rate + 5%)
var firstYearRate = annualRate + 0.05;
var valueAfterYearOne = purchasePrice * (1 – firstYearRate);
if (carAge === 1) {
currentValue = valueAfterYearOne;
} else {
// Subsequent years using declining balance formula
currentValue = valueAfterYearOne * Math.pow((1 – annualRate), (carAge – 1));
}
}
// Apply condition penalty
currentValue = currentValue / condition;
var totalLoss = purchasePrice – currentValue;
var percentageRetained = (currentValue / purchasePrice) * 100;
// Display Results
document.getElementById('currentValue').innerHTML = "$" + currentValue.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('totalLoss').innerHTML = "$" + totalLoss.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('percentageRetained').innerHTML = percentageRetained.toFixed(1) + "%";
document.getElementById('resultsArea').style.display = "block";
// Smooth scroll to results
document.getElementById('resultsArea').scrollIntoView({ behavior: 'smooth', block: 'nearest' });
}
@media (max-width: 600px) {
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grid-template-columns: 1fr !important;
}
}
#calculator-container input:focus, #calculator-container select:focus {
outline: none;
border-color: #1a237e !important;
box-shadow: 0 0 5px rgba(26,35,126,0.2);
}