How it works
A car depreciation calculator projects what a vehicle will be worth after each year of ownership using declining-balance math - the same pattern real used-car values follow, where the steepest losses come earliest. Enter the purchase price, an annual loss rate and a horizon, and the tool walks the value curve year by year: a $34,000 car shedding 15% a year is worth about $28,900 after one year, $24,600 after two and barely $15,100 after five. That first-year collapse is why nearly every ownership decision hinges on it - gap insurance exists because a fresh loan balance routinely exceeds the year-one value; leasing exists partly because someone else absorbs precisely this curve; and the advice to buy a two- or three-year-old car works because the original owner already paid the worst of it. Depreciation is also, unglamorously, the biggest single cost of owning a car: spread across five years, the roughly $18,900 lost above dwarfs what most owners spend on fuel or insurance in the same span. Slow-depreciating models hold value like assets; fast ones quietly tax you every month you own them, however carefully you drive.
Formula
Value after n years = purchase price x (1 - annual depreciation rate)^n
Tips
- Expect 20-30% gone in year one - shape the down payment around it.
- Compare residuals across trims before buying; they diverge sharply within one nameplate.
- Mileage and condition move resale - complete service records are literal money.
- If the loan balance outruns the projected value, gap insurance closes the shortfall.
- Buying two or three years old hands the steep part of the curve to someone else.
Frequently asked questions
- How fast do cars lose value?
- Most lose 20-30% of their value in the first year and roughly half within five. Rates vary widely by brand and body style - trucks and some SUVs historically depreciate slowest, luxury sedans fastest. Use 13-17% a year as a working average for mainstream models.
- How do you calculate car depreciation?
- The standard model is declining balance: multiply the value by (1 minus the annual rate) each year, which front-loads losses the way the market actually behaves. A $34,000 car at 15% a year is worth about $15,100 after five years. The calculator runs this year by year with a full table.
- Which cars hold their value best?
- Consistently: trucks, Jeep-family vehicles, Porsche and Toyota's truck-and-SUV line - brands with proven durability and strong demand used. Check published five-year residual percentages for the specific model rather than trusting class stereotypes.
- Why do new cars depreciate so quickly?
- Because buyers pay a premium for newness that evaporates at first sale - the car becomes "used," losing its warranty halo, margin markup and the option to configure it. The metal did not change; the buyer pool and pricing power did.
- Does mileage affect car depreciation?
- Strongly. Values are priced against annual-mileage bands (roughly 12,000 a year); high-mileage cars cross into lower condition tiers and shed value faster. Conversely, low-mileage examples command premiums - though garaged 4,000-mile-a-year cars still age out of warranty value.