What determines your car's value

Your car's value depends on five things: how old it is, how many miles are on it, what condition it's in, what model and trim level you own, and what the local market is paying right now. A 2019 Honda Civic with 60,000 miles in good condition is worth more than a 2019 Honda Civic with 120,000 miles and a dent in the door. The same car sells for different amounts in different regions because supply and demand shift by location.

The year, make, model, and trim matter because they determine the car's original features, reliability reputation, and how many people want to buy one like it. A Toyota Corolla holds value differently than a Nissan Altima, even if they're the same age. Luxury brands, sports cars, and trucks often hold value better than economy sedans, but that varies by model.

Mileage is one of the largest factors. Every 10,000 to 15,000 miles typically reduces value by a small percentage, but the effect compounds over time. A car with 50,000 miles is worth significantly more than one with 150,000 miles, all else equal.

Key Takeaways

  • Multiple free valuation tools exist — Kelley Blue Book, NADA Guides, and Edmunds are the most widely used — and they often show different prices because they use different data sources and methods.
  • You need your vehicle identification number (VIN), the year, make, model, trim level, mileage, and an honest assessment of the car's condition to get an accurate estimate.
  • Dealer trade-in values are typically 10 to 20 percent lower than private-sale values because dealers need margin to resell the car.
  • Local market conditions matter: a truck is worth more in a rural area, and a sedan may be worth more in a city, so check tools that let you enter your ZIP code.
  • Your actual selling price will likely fall within a range rather than match a single number, and negotiation, timing, and how you present the car all affect the final price.

Using Kelley Blue Book, NADA, and Edmunds

Kelley Blue Book (kbb.com) is the most recognizable tool. Enter your VIN or manually input the year, make, model, and trim. Then select your mileage range, condition (Fair, Good, Excellent), and ZIP code. The tool shows you a range: the typical retail value (what a private buyer might pay), the trade-in value (what a dealer offers), and the value "as-is" (if you sell it yourself without reconditioning). Kelley also shows recent sales of similar cars in your area, which can ground the estimate in real transactions.

NADA Guides (nadaguides.com) works similarly but is used heavily by dealers and lenders. It also requires your VIN or manual entry of vehicle details, mileage, and condition. NADA tends to be more conservative than Kelley in some categories and more generous in others — the difference often reflects which data sources each tool weights most heavily. NADA also breaks down value by condition level more granularly (Rough, Average, Clean, Excellent).

Edmunds (edmunds.com) offers a "True Market Value" estimate that shows what cars actually sold for in your area in the past 30 days. This can be more grounded in current local reality than national averages. Edmunds also factors in regional demand and seasonal trends. All three tools let you adjust for add-ons (leather, sunroof, navigation) and damage (accidents, service records).

None of these tools is "correct" — they're all estimates based on incomplete data. If all three show your car at $12,000, $13,500, and $11,800, your car is probably worth something in that range. If they diverge wildly, double-check that you entered the same condition and mileage into each one.

Condition assessment and what it means

The condition rating you select has the largest impact on the final number after mileage. "Excellent" typically means the car looks and runs like it's a few years newer than it is — no dents, no stains, recent tires, all service records, and a clean interior. "Good" means normal wear for the age and mileage: minor scuffs, clean interior, all major systems working, but maybe original tires or a few small cosmetic issues. "Fair" means visible wear, maybe a dent or two, worn interior, and all systems functional but not pristine.

Be honest about condition. If you rate your car as "Excellent" when it has a cracked windshield and worn brake pads, the valuation tool will overestimate what you can actually sell it for. Buyers will see the damage and either walk away or negotiate down. If you underrate the condition, you're leaving money on the table.

Take photos of the exterior, interior, engine bay, and odometer before you value the car. Look at the tires, brakes, paint, upholstery, and dashboard. Note any accidents, repairs, or service records you have. If you've kept up maintenance and have receipts, that can add value — some tools let you note this, and private buyers often pay more for documented service history.

Dealer trade-in value versus private sale value

Valuation tools typically show two numbers: trade-in value and retail value. Trade-in value is what a dealer will offer you if you're buying another car from them and trading yours in. Retail value is what a private buyer might pay if you sell directly. The gap is usually 10 to 20 percent, sometimes more.

Dealers offer less because they have to recondition the car (new tires, detailing, repairs), hold it on the lot while it sells, and cover overhead. A dealer buying your car at trade-in value needs to resell it at retail value to make a profit. If a tool shows your car at $12,000 retail and $10,000 trade-in, that $2,000 gap is the dealer's margin.

If you're trading in, the dealer's offer is what matters. If you're selling privately, aim for the retail value but expect to negotiate down slightly. If you're selling to a used-car buyer (not a dealer), they'll often offer something between trade-in and retail because they're taking on some risk and cost but not as much as a large dealer.

How location and market timing affect price

The same car is worth different amounts in different places. A four-wheel-drive truck is worth more in Colorado or Montana than in Florida. A fuel-efficient sedan is worth more in a city where gas prices are high and parking is tight. A sports car might be worth more in a warm climate where people drive convertibles year-round.

Make sure the valuation tool lets you enter your ZIP code. National averages are useful for a ballpark figure, but local data is more accurate for what you'll actually get. If you're selling in a different state than where you bought the car, check the value in both places — it might be worth more to ship it or sell it locally depending on the market.

Timing also matters. Convertibles and sports cars are worth more in spring and summer. Trucks and SUVs are worth more in fall and winter. Fuel prices affect sedan and truck values. Interest rates affect how many people are buying. You can't control the market, but knowing whether you're selling into a buyer's market or a seller's market helps you set realistic expectations.

What to do with your valuation estimate

Once you have a number from one or more tools, use it as a starting point, not a final answer. If you're trading in, the dealer's offer may be lower than the tool's estimate — that's normal. You can use the tool's number to negotiate, but dealers have their own pricing systems and won't match a website estimate exactly.

If you're selling privately, list your car at or slightly above the retail value from the tool, knowing that buyers will negotiate. If you price it at the trade-in value, you're leaving money on the table. If you price it well above the retail value, it will sit unsold. The sweet spot is usually 5 to 10 percent above the tool's retail estimate, which gives room for negotiation and accounts for the fact that your car might be in slightly better condition than the "average" car the tool is estimating.

Keep the valuation estimate handy when you're negotiating with buyers or dealers. It gives you a reference point and shows you've done your homework. If a dealer's offer is significantly lower than what the tool shows, ask why — it might be because they see damage you missed, or it might be because their system values the car differently.

Frequently Asked Questions

Do I need my VIN to get a valuation?

No, but it helps. All three major tools let you enter the year, make, model, trim, mileage, and condition manually if you don't have the VIN handy. The VIN is faster and more accurate because it tells the tool the exact trim level and original features. If you're not sure of your trim level, the VIN removes the guesswork.

Why do the three tools show different prices?

They use different data sources, weight recent sales differently, and have different algorithms. Kelley, NADA, and Edmunds all pull from actual car sales, but they don't all see the same sales data, and they interpret condition and mileage slightly differently. This is why checking all three gives you a range rather than a single "correct" answer.

Should I get my car appraised in person?

If you're selling to a dealer or a used-car buyer, yes — they'll inspect it and may adjust the offer based on what they find. If you're selling privately, an in-person inspection by the buyer is normal, but you don't need a professional appraisal unless you're dealing with a high-value car or have a specific reason (insurance, legal dispute, donation).

What if my car has been in an accident?

Most valuation tools let you note accident history. A car with a clean title and no accidents is worth more than one with a salvage title or major accident history. If the accident was minor and fully repaired, the impact on value is smaller. If there's structural damage or the title is branded, the value drops significantly — sometimes 20 to 40 percent or more.

How often should I check my car's value?

If you're planning to sell or trade in soon, check it monthly to track trends. If you're keeping the car, checking once a year is enough. Values generally decline over time as the car ages and mileage increases, but market conditions and fuel prices can cause short-term swings. Checking before you actually need to sell gives you time to adjust your expectations.