- How is car depreciation calculated?
- The calculator uses a multiplicative curve: each year the car loses a fraction of the PREVIOUS year's value, not the original purchase price. Year 1 takes the biggest hit (~20% for a mainstream car — the steep "off-the-lot" drop). Years 2-5 settle into a steadier ~15% annual decline. From year 6 onward the curve flattens to ~10%/year as the car approaches its residual floor. This compounds: a $30,000 mainstream car loses $6,000 in year 1, then $3,600 in year 2 (15% of the remaining $24,000), and so on. After five years it's worth roughly $12,500 — about 42% of the original price.
- Why does brand class matter so much?
- Two reasons. First, brand reputation drives resale demand: a 5-year-old Toyota Camry has a longer queue of buyers than a 5-year-old Chrysler 200, which props up its price. Second, luxury brands carry an expensive-to-own tail — out-of-warranty repairs on a BMW or Range Rover can cost more than the car's residual value, which collapses what used buyers will pay. The calculator models this with three curves: 15/10/8 for reliable brands, 20/15/10 for mainstream, and 25/17/10 for luxury. After 5 years on a $30k car: reliable retains ~56%, mainstream ~42%, luxury ~36%.
- Is this an exact appraisal?
- No — it's an estimate. The curve assumes average mileage (~12,000 mi/year), average condition, no accident history, and an average trim level. Real resale price moves with all of those: a low-mileage well-maintained example sells well above curve; a high-mileage one with collision repair sells well below. For an actual sale price, pull a KBB or Edmunds market value with your VIN and the real mileage, then negotiate from there. For insurance settlement or estate purposes, a written appraisal from a licensed dealer is the only number anyone will accept.
- Why does a new car lose so much value in year one?
- Three things compound. First, the dealer's profit margin (typically 5-12% of MSRP) is baked into the new-car price and vanishes the moment the title transfers — a one-day-old car is mechanically identical but no longer "new." Second, the buyer pool shrinks: most new-car buyers want the warranty and the new-car smell, and won't consider a one-year-old example without a discount. Third, manufacturers release the next model year, which makes yours "last year's car" overnight. The 20% year-1 drop captures all three. EVs depreciated faster historically (battery uncertainty); newer EVs are tracking closer to the mainstream curve as battery life proves out.
- Do luxury cars really depreciate faster than economy cars?
- Yes, in percentage terms — though the dollar amounts often invert. A $80,000 BMW losing 65% over 5 years drops $52,000; a $25,000 Honda Civic losing 45% drops $11,250. The luxury buyer loses more dollars but the percentage curve is steeper because (a) the new-car premium is bigger, (b) out-of-warranty maintenance costs scare used buyers, and (c) the used luxury market is thinner — fewer buyers can afford the running costs even at a steep discount.
- When does a car stop depreciating?
- It mostly doesn't, but the curve flattens. After about year 6 the depreciation rate drops to ~10%/year for most cars, and after year 10 it slows further toward the "residual floor" — the price below which a working car simply won't sell because parts and labor cost more than that. For mainstream cars that floor sits around $3,000-$5,000; for luxury, slightly higher because parts are pricier. Classic and enthusiast cars eventually break the curve and appreciate (air-cooled Porsches, early Land Cruisers, Integra Type Rs) — but those are exceptions driven by collector demand, not the depreciation engine.
- Should I buy new or used to minimize depreciation?
- Used wins on depreciation cost by a wide margin. The first owner absorbs the steepest part of the curve — that 20-25% year-1 drop — and the second owner picks up a near-identical car after the worst has happened. A two-to-three-year-old example is the typical sweet spot: most of the depreciation hit is in the rear-view mirror, the car is still under or near factory warranty, and the buyer pool of used examples is large enough to give you negotiating room. Certified Pre-Owned (CPO) cars price slightly above non-CPO used but include a manufacturer-backed warranty extension — worth the premium for luxury brands, debatable for reliable brands.
- How does mileage affect the depreciation curve?
- The calculator's curve assumes average use (~12,000 mi/year), so age and mileage roughly track together. If actual mileage is well above or below average, adjust expectations: every 10,000 miles above average typically knocks 5-10% off the value, every 10,000 below adds 3-5%. High-mileage cars depreciate faster because they hit major service intervals (timing chain, transmission service, suspension refresh) sooner; low-mileage examples sell at a premium to enthusiasts and second-car buyers, but past a point ("garage queen" with dried seals and dead batteries) the premium evaporates.
