Worked out with the same math as your Tradein result, with sources. Last checked 2026-10-25.
Short answer: selling your car yourself can put more in your pocket, but the most you can gain is what the dealer would have made on it: its resale margin plus the cost of fixing it up. On a typical $29,281 used car in good shape that's at most $3,184, before you count the sales tax a trade-in saves on your next car ($720 in Michigan on that car) and the time and risk of a private sale. Most private sales land below that best case.
A dealer buying your car has to resell it for more than it paid you. So a trade-in offer is roughly:
what the car will sell for − the dealer's margin − reconditioning
A private buyer doesn't charge you a margin or a reconditioning bill, so in theory you keep both. In practice a private buyer won't pay full dealer price either: they get no warranty, no inspection, no financing help and no recourse if something breaks next week. So a private sale usually lands somewhere between the trade-in value and the dealer's price, and the top of that range is the best case, not the expected one.
Nobody publishes a measured average of what private sellers actually get compared with trade-in offers, so we don't quote one. What we can show is the ceiling, using real numbers.
A car in good condition that dealers near you list at $29,281 (about the average used-car price at new-car dealers in the first half of 2026, per NADA):
| Amount | |
|---|---|
| Dealer list price | $29,281 |
| − Dealer margin (7.8%) | −$2,284 |
| − Reconditioning (good condition, our estimate) | −$900 |
| = Trade-in value | $26,097 |
| Most a private buyer pays | up to $29,281 |
| Best case extra from selling it yourself | up to $3,184 |
The dealer margin is 7.8% of the list price: about 5.4% average dealer gross profit on a used car, plus our estimate of the discount buyers get off asking prices (where that comes from). The reconditioning amount for each condition is our estimate. For a car in fair or rough condition, a private buyer will also knock the repairs off the top, so the best case shrinks; your result does that for your car.
In most states you pay sales tax on the price of your next car minus your trade-in, but only when the dealer takes your car as part of the purchase. Sell it yourself and you pay tax on the full price. That savings is real money, and it comes off the best case above. "Tax saved" is on the $26,097 trade-in from the example; "most left to gain" is what selling it yourself could still add after giving that up:
| State | Rate | Tax saved | Most left to gain |
|---|---|---|---|
| California | 7.25% | $0 (no credit) | $3,184 |
| Florida | 6% | $1,570 | $1,614 |
| Georgia | 7% | $1,830 | $1,354 |
| Illinois | 6.25% | $1,630 | $1,554 |
| Indiana | 7% | $1,830 | $1,354 |
| Iowa | 5% | $1,300 | $1,884 |
| Kentucky | 6% | $1,570 | $1,614 |
| Maryland | 6.5% | $1,700 | $1,484 |
| Massachusetts | 6.25% | $1,630 | $1,554 |
| Michigan | 6% | $720 | $2,464 |
| Minnesota | 6.875% | $1,790 | $1,394 |
| Missouri | 4.225% | $1,100, private sale too | $3,184 |
| New Jersey | 6.625% | $1,730 | $1,454 |
| New York | 4% | $1,040 | $2,144 |
| North Carolina | 3% | $780 | $2,404 |
| Ohio | 5.75% | $1,500 (new car only) | $1,684 |
| Pennsylvania | 6% | $1,570 | $1,614 |
| Rhode Island | 7% | $1,830 | $1,354 |
| Tennessee | 7% | $1,830 | $1,354 |
| Texas | 6.25% | $1,630 | $1,554 |
| Virginia | 4.15% | $0 (no credit) | $3,184 |
| Washington | 6.5% | $1,700 | $1,484 |
| Wisconsin | 5% | $1,300 | $1,884 |
State rate only; local tax can add more. Each state's rule and official source is on our trade-in tax page. States not listed: we haven't checked them yet.
Online and big-lot buyers will make a firm offer on your car without you buying anything from them. CarMax, for example, says its offer is the same whether or not you buy from it, and is good for seven days (CarMax). It's a useful floor to bring to a dealer. Like a private sale, it doesn't give you the trade-in tax credit on your next car (in most states), so compare it against your trade-in value plus the tax savings.
Is it better to trade in a car or sell it privately? Selling privately usually gets a higher price, but the most you can gain is the dealer's margin plus reconditioning: up to $3,184 on a $29,281 car in good condition. In most states a trade-in also cuts the sales tax on your next car, which narrows that gap, and a private sale takes time and carries payment-scam risk. Compare your own car's numbers before deciding.
How much more do you get selling a car privately than trading it in? At most, the dealer's resale margin plus its reconditioning cost. With a 7.8% margin and our good-condition reconditioning estimate, that's up to $3,184 on a $29,281 car, before the trade-in tax savings you give up. Private buyers rarely pay full dealer price, so most sales land below that.
Do I lose the sales tax credit if I sell my car privately? In most states, yes. The credit applies when the dealer takes your car in trade as part of the purchase. Missouri is an exception among the states we've checked: it gives the same credit for a private sale within 180 days of buying. See the trade-in tax page for each state.
Do I pay income tax when I sell my car? Usually not, because most cars sell for less than you paid. The IRS says losses on personal-use property such as your car aren't deductible; if you ever sell one for more than you paid, the gain is a capital gain (IRS Topic 409).
What's the safest way to get paid for a car? Cash counted at your bank, or a payment you confirm with your own bank before signing the title. The FTC's rule of thumb: never accept a check for more than the price and never send money back to a buyer who says they overpaid.
The worked example and the tax table are generated from the same code as your Tradein result, so they move together. How we estimate your trade-in value · What dealers make on a used car.
How we calculate it · Trade-in tax by state · What dealers make · Trade in or sell? · What dealers check · Owe more than it's worth? · When to sell · Selling a car by state · Stop calls & texts