Car Depreciation Calculator — see your vehicle's future value

A car depreciation calculator shows you the number every car buyer eventually has to face: new vehicles lose value fast, and that loss is often the single biggest cost of ownership — bigger than fuel, insurance, or maintenance combined. This tool projects a vehicle's value forward year by year so you can see, in real dollars, what depreciation actually costs you over time.

The team at Arb Digital built this calculator as part of a free tools library that helps everyday people run quick, illustrative numbers before making a purchase decision — no signup, no email capture, just an instant estimate.

What This Car Depreciation Calculator Does

Enter the purchase price, a first-year depreciation percentage, an annual rate for the years after that, and how many years you want to project. The calculator applies the first-year rate once, then compounds the annual rate against the remaining balance for each subsequent year — this mirrors how real depreciation works, since a car loses a percentage of what it's currently worth, not a percentage of the original price, each year going forward.

You'll see the estimated value at the end of the projection period, the total dollar amount lost, the percentage of original value retained, the value after just year one (often the biggest single drop), and the average dollar loss per year across the whole period. A full year-by-year table below the results breaks down exactly how the number changes each year.

How to Use It

1. Enter the purchase price. Use the out-the-door price or MSRP, whichever you want the projection to start from.
2. Set the first-year rate. New vehicles commonly lose 15–25% of value in year one; used vehicles that already depreciated will drop far less immediately.
3. Set the ongoing annual rate. A common illustrative benchmark is 10–15% per year after year one, though this varies significantly by make, model, and mileage.
4. Choose your time horizon. Ten years is typical for seeing a car depreciate toward its long-term floor value.
5. Click Calculate and review the year-by-year table to see exactly when the biggest drops in value happen.

The Formula / How It's Calculated

The math behind this tool is a standard declining-balance model, the same approach used for other depreciating assets. Year one applies a single percentage cut to the purchase price: Value after Year 1 = Purchase Price × (1 − First-Year Rate). For example, a $30,000 car with a 15% first-year rate would be worth $30,000 × (1 − 0.15) = $25,500 after year one. Every year after that compounds the ongoing rate against the previous year's ending value: Value at End of Year N = Value at Start of Year N × (1 − Annual Rate). This compounding effect means the dollar amount lost each year shrinks over time even though the percentage rate stays the same, because it's being applied to a smaller and smaller balance.

These percentages are illustrative benchmarks you can and should adjust — real-world depreciation depends heavily on brand reputation, reliability history, mileage, condition, and market demand. For general guidance on vehicle costs and ownership, the Consumer Financial Protection Bureau's auto loan resources are a useful independent reference, and Investopedia's explainer on depreciation covers the underlying accounting concept in more depth.

How Mileage Affects Resale Value

Depreciation rate assumptions typically bake in an average mileage of around 12,000–15,000 miles per year. A vehicle driven well above that average will usually depreciate faster than the benchmark rate suggests, since buyers and dealers price used cars partly on mileage brackets — crossing a round-number threshold like 60,000 or 100,000 miles can trigger a noticeably bigger drop in resale value than the mileage difference alone would suggest. Conversely, a low-mileage car of the same age often holds value better than the standard curve predicts, because it reads as "lightly used" to the next buyer regardless of the calendar age of the vehicle.

How Brand and Segment Affect Resale Value

Not all vehicles depreciate at the same rate, which is exactly why this calculator lets you edit both the first-year and ongoing rates rather than hardcoding a single number. Brands known for reliability and strong resale demand — many trucks and certain Japanese and Korean brands, for instance — often depreciate more slowly than the generic 15–20% first-year benchmark, sometimes retaining 55–65% of value after five years. Luxury vehicles, electric vehicles in fast-moving segments, and low-demand sedans have historically depreciated faster, in some cases losing more than half their value in the first three years. If you know how a specific make and model has historically performed, adjust the rates here to match rather than relying on the defaults.

Why the First Year Hurts the Most

The single biggest value drop for almost any new vehicle happens the moment it's driven off the lot and re-classified from "new" to "used" — a status change that has nothing to do with the car's condition but everything to do with how resale markets price the two categories differently. This is why the calculator separates the first-year rate from the ongoing annual rate: lumping them together would understate how front-loaded depreciation really is, and buyers who plan to sell or trade in within the first two to three years should pay especially close attention to this number.

Depreciation vs. Loan Balance: Why Timing Matters

Depreciation becomes a real financial risk, not just an abstract number, when it's compared against how quickly a car loan balance goes down. Most auto loans are structured so that the early payments are weighted more heavily toward interest than principal, meaning the loan balance falls relatively slowly in the first year or two — right when the vehicle itself is depreciating fastest. This combination is how buyers end up "upside down," owing more on the loan than the car is worth, particularly with small down payments, longer loan terms, or a purchase price that included a large amount of add-ons and fees rolled into the financed total. Running this calculator alongside a basic amortization schedule for your loan can show you the specific months where your equity position is at its most negative, which is useful information before agreeing to a trade-in or considering gap insurance.

This dynamic is also why shorter loan terms and larger down payments are generally considered lower-risk from a pure equity standpoint: they bring the loan balance down faster, closer to the pace at which the vehicle's value is actually falling. None of this changes the depreciation curve itself, but it changes how exposed you are to it if your plans change and you need to sell or trade the vehicle earlier than expected.

How Lease Residual Values Relate to Depreciation

If you're comparing buying to leasing, it helps to know that a lease's "residual value" — the amount the leasing company predicts the car will be worth at the end of the lease — is essentially their own internal depreciation forecast, often built from more detailed, model-specific historical data than a general-purpose calculator can use. A vehicle with a residual value set unusually high relative to its typical depreciation curve can make for a more attractive lease deal, since your monthly payments are based on the difference between the purchase price and that residual figure. Comparing the residual percentage quoted in a lease offer against the "value retained" figure this calculator produces for the same time period can be a useful sanity check on whether a specific lease deal is priced favorably or not.

Should You Buy New, Buy Used, or Lease?

Running this calculator with different starting assumptions is a useful way to compare the three main ways people acquire a vehicle. Buying new means absorbing the steepest part of the depreciation curve yourself in exchange for the newest technology, a full warranty, and the ability to choose exact options. Buying a car that's two or three years old means the original owner already absorbed the first-year hit, so your own depreciation rate going forward is typically closer to the flatter ongoing annual rate rather than the steeper first-year figure — which is exactly why this calculator separates the two. Leasing sidesteps the depreciation question almost entirely from the driver's perspective, since you're paying for the projected loss in value over the lease term rather than owning the asset and being exposed to whatever happens to it afterward. None of the three is universally "correct" — the right choice depends on how long you plan to keep the vehicle, how much cash you have available upfront, and how much you value having a warranty versus building equity in something you own outright.

Common Mistakes to Avoid

• Using the same rate for every year. Applying one flat percentage across the whole ownership period overstates the later-year losses and understates the first-year hit — always separate year one from the rest.
• Ignoring the compounding effect. Because each year's depreciation is calculated on the remaining value, not the original price, a "15% a year" car does not lose 15% of its original price every year — the dollar amount shrinks over time.
• Forgetting mileage and condition. The default rates are averages. A vehicle with unusually high mileage, an accident history, or deferred maintenance will typically depreciate faster than the benchmark suggests.
• Assuming all vehicles depreciate identically. Truck and reliability-focused brands often hold value differently than luxury or low-demand models — adjust the rate to match the specific vehicle where possible.

Related Free Tools From Arb Digital

If this was useful, try the EV Charging Cost Calculator to estimate ongoing electricity costs for an electric vehicle, or the Days Until Date Calculator if you're counting down to a purchase, lease-end, or trade-in date. Browse our full free online tools hub for more calculators covering everyday planning and finance.

Frequently Asked Questions

This tool runs entirely in your browser using built-in JavaScript. Nothing you enter is uploaded, stored, or sent to any server.

This tool provides general estimates for educational purposes only and is not financial, tax, legal, or medical advice. Figures are illustrative; consult a licensed professional for decisions.