What determines how much your car loses in value
A car loses value the moment you drive it off the lot, but the rate depends on specific, measurable factors. The biggest ones are mileage, age, condition, market demand for that model, and local fuel prices. A five-year-old Honda Civic with 60,000 miles will hold value differently than a five-year-old luxury sedan with the same mileage, because buyers compete harder for the Honda.
You can estimate depreciation yourself using real market data rather than guessing. The process takes about 15 minutes and requires only the car's year, make, model, current mileage, and condition. You do not need a dealer appraisal or a mechanic's inspection to get a useful number — though those help if you need precision.
Key Takeaways
- Kelley Blue Book and NADA Guides let you enter your car's details and see what similar cars sold for in your region, which is the most reliable depreciation method.
- A car typically loses 15 to 20 percent of its value in the first year, then 10 to 15 percent annually for the next four years, though luxury and sports cars depreciate faster.
- Mileage matters more as a car ages — a 10-year-old car with 150,000 miles loses value faster than a 3-year-old car with the same mileage.
- Condition ratings (excellent, good, fair, poor) change the estimate by hundreds or thousands of dollars, so be honest about dents, mechanical issues, and interior wear.
- Regional demand shifts the number — a truck holds value better in rural areas, while sedans hold value better in cities.
Using Kelley Blue Book to find your car's current value
Kelley Blue Book (kbb.com) is the most widely used source because dealers and private buyers reference it. Go to the home page and select "Find the Value of My Car." Enter your car's year, make, model, and trim level. Then enter the current mileage and select a condition rating: Excellent (no accidents, minimal wear), Good (minor wear, well-maintained), Fair (visible wear, some mechanical issues), or Poor (significant damage or mechanical problems).
Kelley will show you three numbers: the trade-in value (what a dealer will pay you), the private party value (what you can get selling to an individual), and the dealer retail value (what a dealer will charge a buyer). For estimating depreciation, use the private party value — it reflects what your car is actually worth in the open market right now.
Write down that number. This is your car's current value. To estimate what it will be worth in one, three, or five years, you will need to repeat this process with a projected mileage and condition. If you drive 12,000 miles per year, a car worth $15,000 today at 50,000 miles will be worth less at 62,000 miles in one year — but how much less depends on the model.
Projecting value by entering future mileage and condition
Go back to Kelley Blue Book and enter the same car, but this time use the mileage you expect it to have in one year, three years, or five years. If you currently have 50,000 miles and drive 12,000 miles yearly, enter 62,000 for one year out, 86,000 for three years out, and 110,000 for five years out. Keep the condition rating the same unless you expect the car to deteriorate (which is realistic for older cars).
The new value Kelley shows you is your projected value at that mileage. Subtract it from today's value to see the total depreciation. For example: if your car is worth $15,000 today and $12,500 in one year, you have depreciated $2,500 — about 17 percent. That is normal for most cars in their first few years.
Repeat this for year three and year five to see the full curve. Most cars depreciate fastest in years one through three, then slower after that. A car that loses $2,500 in year one might lose only $1,200 in year four, because there is less value left to lose.
Using NADA Guides as a second source
NADA Guides (nadaguides.com) works similarly to Kelley but sometimes produces different numbers because it weights regional data differently. Use it as a check on your Kelley estimate. Enter your car's details the same way: year, make, model, mileage, and condition. NADA also asks for your ZIP code, which adjusts the value based on local market demand.
If Kelley and NADA differ by more than a few hundred dollars, the difference usually reflects regional variation. A pickup truck might be worth $500 more in rural Montana than in downtown Seattle. If you are estimating for a car you plan to sell, check both sources and use the average. If you are estimating for a car you plan to keep, either number is reasonable.
NADA also publishes depreciation tables by model, which show how much a specific car typically loses each year. These are useful if you want to see the historical pattern for your model rather than entering data repeatedly. Search "NADA depreciation [your car model]" to find the table.
Adjusting your estimate for accident history and major repairs
Both Kelley and NADA ask you to select a condition rating, but that rating assumes normal wear. If your car has been in an accident, had a major repair, or has a branded title (salvage, flood, lemon law), the actual value will be lower than the estimate. A car with frame damage might be worth 20 to 30 percent less than the same car in good condition.
If your car has accident history, select "Fair" or "Poor" rather than "Good" to account for it. If it has had a major engine or transmission repair, do the same. The condition rating is your chance to be honest about the car's actual state. Overestimating condition will give you an inflated depreciation estimate.
You can also check your car's history on Carfax (carfax.com) or AutoCheck (autocheck.com) before you estimate. These services show accidents, repairs, and title issues. If you see something significant, factor it into your condition rating or assume the buyer will discover it and adjust their offer down.
Understanding why luxury and sports cars depreciate differently
A luxury car or sports car often depreciates faster than a mainstream sedan, even if both are the same age and mileage. This happens because the buyer pool is smaller — fewer people want a $60,000 used BMW than a $20,000 used Honda. When demand is lower, prices fall faster to move inventory.
Maintenance costs also matter. A luxury car with expensive parts and specialized service will depreciate faster because future buyers factor in higher ownership costs. A sports car depreciates faster because insurance and fuel are more expensive, and the buyer pool skews toward younger drivers who have fewer purchase options.
Use Kelley and NADA the same way for these cars, but expect the percentage depreciation to be higher. A luxury sedan might lose 25 to 30 percent in the first three years, while a mainstream sedan loses 20 to 25 percent. The tools will show you the actual numbers for your specific model.
Factoring in mileage-based depreciation for high-mileage cars
Mileage matters more as a car ages. A 3-year-old car with 60,000 miles is considered well-maintained. A 10-year-old car with 60,000 miles is considered low-mileage and worth a premium. Conversely, a 10-year-old car with 150,000 miles is considered worn and worth less.
When you enter mileage into Kelley or NADA, the tool automatically adjusts the value. But if you drive significantly more or less than average (12,000 miles per year), your depreciation will be different from the national average. A car that is driven 20,000 miles per year will depreciate faster than one driven 8,000 miles per year, all else equal.
If you are estimating for a car you plan to keep, project your actual expected mileage. If you are estimating for a car you plan to sell, remember that buyers will see the mileage and adjust their offers. A car with higher-than-average mileage will depreciate more than the estimate suggests, because the next buyer will pay less.
Frequently Asked Questions
Does the color of my car affect depreciation?
Color has a small effect. White, black, and silver are easier to resell because they appeal to more buyers. Unusual colors like bright yellow or orange may depreciate slightly faster. Kelley and NADA do not ask for color, so this effect is not captured in their estimates — but it is usually only a few hundred dollars on a used car.
How do I know if my condition rating is accurate?
Excellent means no accidents, no dents, no interior stains, and all maintenance records. Good means minor cosmetic wear but no major damage. Fair means visible dents, worn interior, or a recent minor repair. Poor means significant damage or mechanical issues. If you are unsure, take photos of the exterior and interior and compare them to Kelley's condition descriptions online.
Will my car depreciate differently if I lease instead of buy?
Depreciation only applies to cars you own. When you lease, the leasing company absorbs the depreciation risk. You pay a monthly fee that includes the expected depreciation, insurance, and maintenance. If you want to understand depreciation for a lease decision, calculate what the car will be worth at lease-end using these tools, then compare that to your total lease payments.
Can I use these estimates to predict resale value for a car I haven't bought yet?
Yes. Enter the year, make, and model you are considering, along with the mileage it will have when you buy it and when you plan to sell it. This shows you the depreciation curve for that specific model. Compare depreciation across models to see which holds value better — useful information if you are deciding between two cars.
What if my car's value has gone up instead of down?
This happens occasionally with used cars, especially during supply shortages or for models that become collectible. Kelley and NADA will show the current market value, which may be higher than what you paid. This is not depreciation — it is appreciation. It usually does not last, so do not assume your car will continue gaining value.