Continue from the depreciation scenario
Place value loss inside total ownership cost, learn how to record it consistently or use the result while assessing a used vehicle.
How much value remains in the vehicle?
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What this car depreciation calculator estimates
Vehicle depreciation is the reduction between a starting vehicle value and its later resale value. The calculator converts that change into total value lost, value retained, average loss per year and month, a compound annual decline and an allocation per mile or kilometre.
It is a scenario calculator, not a live vehicle-valuation database. A precise offer depends on make, model, trim, registration date, mileage, equipment, maintenance, condition, accident history, region and the market on the sale date. None of those details should be hidden behind a supposedly universal percentage.
Use the tool before buying, when setting a future resale assumption, or when transferring depreciation into a total cost-of-ownership calculation.
Three transparent ways to calculate future car value
| Model | Best input | How value changes | Useful when |
|---|---|---|---|
| Known future value | Defensible resale or trade-in amount | Derives one equivalent compound rate | You have comparable listings, a guaranteed future value or a planned sale estimate |
| Constant percentage | One annual rate | Same rate applies to the remaining value | You want a simple used-car or long-run scenario |
| Two-stage percentage | First-year and later-year rates | Allows a steeper initial drop followed by a flatter path | You are modelling front-loaded depreciation |
The calculator does not choose the correct rate automatically. The model controls the arithmetic; the quality of the market assumption controls the usefulness of the result.
Car depreciation formulas used by the calculator
For a known future value, the total loss and equivalent compound rate are:
For percentage models, each year begins with the previous year’s closing value:
Because the percentage applies to the remaining balance, a constant 10% rate does not remove 50% of the original price in five years. It retains 0.95, or about 59.05%, before any floor applies.
Choose the correct starting value
For a new purchase, the cleanest starting point is usually the vehicle price itself. Separate delivery, registration, finance interest, insurance, taxes paid for ownership and charging equipment unless those amounts truly form part of the resaleable asset. Most of them do not return when the car is sold.
For a used vehicle that you already own, use a supportable market value today rather than its historic list price. The question is how much value may be lost from now, not how much the first owner already absorbed. When comparing two purchase options, use a consistent boundary for both.
If the entered value includes a rebate, tax credit or subsidy, document whether you are measuring economic value, your personal cash outlay or market resale value. Mixing these perspectives can distort the retained-value percentage.
Where to get a defendable resale-value assumption
| Input source | What to match | What can mislead |
|---|---|---|
| Comparable used-car listings | Model year, trim, powertrain, mileage, equipment and condition | Advertised price is not necessarily the completed transaction price |
| Dealer purchase or trade-in quotes | Quote date, expiry, mileage cap and condition terms | Trade-in value may be combined with discounts on another vehicle |
| Leasing or finance guaranteed value | Term, mileage allowance, damage policy and fees | A contractual balloon is not automatically an open-market sale price |
| Professional valuation database | Exact vehicle identity and local market | Output can still change with condition and rapid market movement |
| Your own sale history | Comparable age, use and market cycle | One past vehicle is a weak sample for another model |
Year-by-year car value and depreciation schedule
The schedule exposes the full calculation. Opening value is the previous year’s closing value; annual loss is their difference. The displayed effective rate reflects any value floor that limited the decline.
| Projection year | Opening value | Effective loss rate | Value lost | Closing value | Value retained |
|---|---|---|---|---|---|
| — | |||||
Compare lower, entered and higher depreciation rates
A single rate hides uncertainty. The sensitivity table shifts the entered rate assumptions by two percentage points in each direction. For a two-stage model, both first-year and later-year rates move. In known-value mode, the calculator first derives its equivalent rate.
| Scenario | Rate assumption | Future value | Total value lost | Value retained |
|---|---|---|---|---|
| — | ||||
This is not a confidence interval or forecast probability. It shows how sensitive the result is to a modest change in the chosen percentage.
Age, mileage and condition affect resale value together
Time and distance cannot be separated perfectly. Mileage influences wear and buyer expectations, while calendar age affects model generation, warranty, technology and perceived obsolescence. Condition, service history, accident repairs, tyres, battery health, specification and colour can move two otherwise similar vehicles apart.
The annual-distance field does not automatically reduce future value because the effect per mile is not universal. Instead, match comparable vehicles at the mileage you expect to reach and adjust the future-value or rate assumption. That keeps market judgment visible rather than embedding an unsupported mileage penalty.
Depreciation per distance is still useful for budgeting. Treat it as total value loss allocated over use, not as a mechanical charge caused by each individual mile.
Petrol, diesel, hybrid, electric and hydrogen vehicles
Powertrain can influence resale value through fuel prices, regulation, charging or refuelling access, warranty, battery or fuel-cell confidence, supply, incentives and demand for used examples. These effects are model-, country- and date-specific. A single permanent rate for every EV, hybrid, combustion or hydrogen vehicle would quickly become misleading.
Use technology-relevant evidence: battery-health documentation for an EV or PHEV, emissions and access rules for combustion vehicles, and local refuelling availability for hydrogen. Compare vehicles with the same powertrain and similar usable capability wherever possible.
The calculator therefore supports all powertrains without assigning one of them a built-in advantage or penalty.
Worked example: value after five years
A vehicle is worth $35,000 today. The selected two-stage scenario uses a 25% decline in the first projected year and 8% in each of the next four years, with a $4,000 floor.
- After year 1: $35,000 × 0.75 = $26,250.
- After four later years: $26,250 × 0.924 = $18,805.32.
- Total depreciation = $35,000 − $18,805.32 = $16,194.68.
- Value retained = 18,805.32 ÷ 35,000 = 53.73%.
- Average value loss = $3,238.94/year or $269.91/month.
- The compound annual decline across all five years is about 11.69%.
Automotive-student exercise: compare linear thinking with compound decline
For automotive-business, dealership and vehicle-technology students: a used car has a starting market value of €24,000. Project four years using a constant depreciation rate of 9% and no binding floor. The vehicle covers 18,000 km/year. Calculate the future value, total depreciation, average annual loss and depreciation allocated per kilometre.
- Compound value factor = (1 − 0.09)4 = 0.914 = 0.68574961.
- Future value = €24,000 × 0.68574961 = €16,457.99.
- Total depreciation = €24,000 − €16,457.99 = €7,542.01.
- Average annual loss = €7,542.01 ÷ 4 = €1,885.50. Individual yearly losses are not equal because each 9% applies to a smaller remaining value.
- Distance = 4 × 18,000 = 72,000 km.
- Allocated depreciation = €7,542.01 ÷ 72,000 = €0.105/km.
Use depreciation inside total cost of ownership
Depreciation is one ownership-cost category. It does not include energy, insurance, registration, vehicle tax, maintenance, repairs, tyres, parking or finance interest. Add the projected loss once to those other costs.
Do not enter purchase price and every loan repayment as expenses and then add depreciation again. Loan principal finances the asset; depreciation measures the part of its value not recovered at sale. Interest and lender fees remain separate finance costs.
Transfer the total value lost to the Car Cost Calculator by entering the same starting price and projected resale value. That tool combines the result with the remaining ownership budget.
Common mistakes when estimating vehicle depreciation
- Applying the annual percentage repeatedly to the original price instead of the remaining value.
- Using the original list price for a used car when measuring loss from today.
- Calling a generic percentage an exact market valuation.
- Comparing a dealer trade-in amount with an optimistic advertised retail price.
- Ignoring expected mileage, condition, accident history or equipment when choosing comparable vehicles.
- Counting registration, interest or insurance inside vehicle value and again as ownership expenses.
- Assuming the first year of a new-car curve applies to every year.
- Treating depreciation per mile as a universal physical wear rate.
- Using an arbitrary floor as a guaranteed residual value.
Assumptions, limitations and the next calculator
The projection assumes the selected rates or future value are valid. It does not connect to live transaction databases, identify the vehicle, forecast regulation or incentives, inspect condition, model accident diminution, separate tax treatment, discount future money or predict appreciation. Market values can move non-smoothly and can temporarily rise.
Save at least a lower-loss and higher-loss scenario. If a small rate change materially alters your affordability decision, obtain current model-specific evidence before relying on the estimate.
Next comes the Vehicle Powertrain Cost Comparison Calculator, which will compare petrol or diesel, HEV, PHEV, BEV and hydrogen alternatives side by side without turning this depreciation page into a broad buying guide.