Tool · Investor Sam Auto

Car Depreciation Calculator

June 30, 2026 • By the Investor Sam Editorial Team • Reviewed by Berly Sam Varghese, Editor
Depreciation is the biggest and most invisible cost of owning a car. This calculator projects a vehicle forward at an annual depreciation rate to estimate its future resale value, the total dollars of value it sheds, and the share of the purchase price you lose. Seeing that number early helps you choose models that hold value and decide how long to keep a car before the depreciation curve flattens.

Example: Purchase price: 35000 $ · Annual depreciation rate: 15 % · Years to project: 5 years

Estimated future value$15,530
Total value lost$19,470
Percent of value lost55.63%

Worked example

A $35,000 car losing 15% of its remaining value each year is worth about 35,000 times 0.85 to the fifth power after five years, or roughly $15,530. That is about $19,470 of value gone, close to 56% of what you paid. The steepest drop happens in year one, which is why buying a lightly used car and letting someone else absorb that first-year hit is a classic money-saving move.

Frequently asked questions

What depreciation rate should I use?

Many new cars lose roughly 15 to 20% per year on a declining-balance basis, with the first year often the worst. Trucks and some SUVs hold value better; luxury sedans and EVs can depreciate faster. Look up your specific model if you can, and run a couple of rates to bracket the outcome.

Why is the first year the most expensive?

A car loses a big chunk of value the moment it is titled and driven off the lot, and depreciation is heaviest in the first two to three years. This is why buying a two- or three-year-old vehicle can capture most of a car life at a fraction of the depreciation.

Does this use straight-line or declining-balance depreciation?

This tool uses declining balance, applying the percentage to the remaining value each year, which better matches how real car values fall. Straight-line would overstate the loss in later years.

How does depreciation affect my real cost of ownership?

Depreciation is usually the single largest ownership cost, bigger than fuel or maintenance for the first several years. Subtracting the projected resale value from your purchase price gives the true cost of the years you drove it.

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Sources

Berly Sam Varghese · Editor, Investor Sam

Berly Sam Varghese is an engineer who treats money the way he treats any hard problem — something to be engineered, not gambled on. He funded years of education and built real financial stability the patient way, by living below his means and investing rather than borrowing. He writes for the person trying to make a car decision without overpaying for years. He reviews and approves every article on Investor Sam and checks the figures against primary sources before anything is published. More about our standards.