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Car depreciation calculator with the assumptions on the table

Depreciation is the ownership cost most shoppers miss. Model current value and future loss with a visible front-loaded curve instead of a black-box “your car is worth X” number.

This is a planning curve, not a live trade offer. The first-year rate is 20.0%; ongoing annual rate is 14.0% before mileage and condition multipliers. Use KBB, NADA or live listings for final negotiation.

Current estimated value

$35,000

0.0 years after purchase

Value already lost

$0

0.0% of original price

Value in 5 years

$15,316

may lose another $19,684

YearProjected valueLoss this yearAnnual rate
1$28,000$7,00020.0%
2$24,080$3,92014.0%
3$20,709$3,37114.0%
4$17,810$2,89914.0%
5$15,316$2,49314.0%
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Why the curve is front-loaded

The new-car premium falls immediately after purchase, so a constant straight-line decline underestimates the first year and overstates later losses. This calculator uses a higher first-year rate, then reduces remaining value each following year. Mileage and condition multiply the rates, because wear has a measurable market consequence.

A preparation number should relocate the negotiation, not replace it. Check actual listings for the model, year, mileage band, service history and option configuration. Use VIN and specification evidence to confirm that two comparables are fundamentally alike before treating the price gap as condition alone.

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