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Car Depreciation Estimator: How It Works and How to Read the Results

Car Depreciation Estimator: How It Works and How to Read the Results

What our depreciation tool calculates, which inputs move the estimate most, and how to use the output when comparing cars.

Comparisons & Rankings Region: Global Updated July 2026 By the True Motion Auto editorial team
Quick answer

Our depreciation estimator projects a vehicle's resale value over 1-10 years using its starting price, segment-typical depreciation curve, mileage assumption, and condition. Most new cars lose 20-30% of value in year one and roughly 50-60% by year five, though EVs, luxury brands and low-demand segments can depreciate faster, while trucks and a handful of resale-strong brands (Toyota, Honda) hold value better than the segment average. The tool gives a range, not a guaranteed resale price — actual value depends on real market demand at the time of sale.

At a glance

InputHow it affects the estimate
Starting price/MSRPBase for the entire depreciation curve
Vehicle segmentSets the default annual depreciation rate (sedans, trucks, EVs differ)
Annual mileageAbove-average mileage accelerates value loss
Ownership lengthValue loss is front-loaded — year one hurts most
Brand resale strengthAdjusts the curve up or down vs. segment average

What the depreciation estimator actually calculates

The tool takes a starting price and applies a segment-based depreciation curve, then layers on adjustments for mileage, brand resale reputation and ownership length. The output is an estimated value range for each year of ownership, plus a total percentage lost — not a single guaranteed number, because real resale value depends on local market demand, vehicle condition and timing that no calculator can fully predict.

The inputs that move the estimate most

  • Starting price — every later-year estimate scales directly off this number, so an accurate purchase price (including typical discounts, not just MSRP) matters.
  • Segment — sedans and minivans tend to depreciate faster than trucks and off-road SUVs, which hold demand better in the used market.
  • Annual mileage — the tool assumes roughly 12,000-15,000 miles/year as a baseline; higher mileage pulls the estimate down faster.
  • Brand resale reputation — brands with strong reliability reputations and high demand (Toyota, Honda, some truck brands) get a positive adjustment versus the segment average.
  • New vs. used purchase — buying a car that's already 1-2 years old skips the steepest depreciation year, which is reflected in the estimate.

Typical depreciation curve by year

Year of ownershipTypical value remaining
Year 170-80% of original price
Year 350-60%
Year 540-50%
Year 1015-25%

These are broad, segment-typical ranges based on widely cited industry patterns, not fixed rules — a strong-demand EV or a truck in short supply can hold value far better than average, and an unpopular sedan trim can fall faster.

How EVs and hybrids differ

Electric vehicles have historically shown wider depreciation swings than gas vehicles, partly because battery technology and incentive programs move quickly, which makes older EVs look less competitive faster. Hybrids tend to track closer to their gas-engine counterparts, sometimes holding value slightly better where fuel prices are high. The estimator applies a wider uncertainty range to EVs for this reason.

How to use the output when comparing cars

  1. Compare the percentage lost, not just the dollar figure — it normalizes across different price points.
  2. Look at the 3-year and 5-year marks specifically, since those match common trade-in and loan-payoff timelines.
  3. Treat the estimate as a planning range, not a quote — get an actual appraisal before selling or trading in.
  4. Re-run the estimate if your mileage plan or ownership length changes significantly.
Watch out

Depreciation estimators can't price in a specific accident history, a sudden model recall, or a local supply shortage. Use the tool for planning and comparison, not as a substitute for a real appraisal at sale time.

Where estimates commonly go wrong

The most common error is entering full MSRP when most buyers actually pay a negotiated price below sticker — this inflates the apparent value loss. The second most common error is ignoring mileage: a car driven well above average will fall faster than the default curve suggests, and one driven well below average will hold value better than the default.

Frequently asked questions

How accurate is a car depreciation estimator?
It's a planning tool, not a valuation. It reflects broad segment trends within a reasonable range but can't account for local demand, condition, or one-off market shifts.
Do electric vehicles depreciate faster than gas cars?
Historically, yes on average and with more variability, largely due to fast-moving battery tech and shifting incentives, though this gap has been narrowing as EV demand matures.
Which cars hold their value best?
Trucks, off-road SUVs, and brands with strong reliability reputations tend to depreciate slower than the segment average, based on widely cited resale-value studies.
Does high mileage always mean lower resale value?
Generally yes — mileage above the ~12,000-15,000/year norm typically accelerates value loss, though a well-documented maintenance history can offset some of that.
Should I trust the tool's number when negotiating a trade-in?
Use it as a starting reference point, then confirm with a real appraisal or multiple trade-in quotes, since dealers price based on current local inventory and demand.

Sources & further reading

Figures, prices and policy details were current at the last-updated date above. Automotive pricing, incentives and regulations change frequently — verify time-sensitive details with the linked primary sources. Read our editorial policy and fact-checking standards.