Why your trade-in offer might be fake

An over-allowance is where a dealer inflates your trade-in figure and recovers the difference by discounting the car you are buying less. The trade number looks generous but the total deal is unchanged. The only way to know what your car is genuinely worth to the trade is to ask for a standalone offer to buy it, with no new car attached.

How it works

You are buying a car advertised at $60,000 and your trade is worth about $29,000 at wholesale. You want $34,000 for it.

The dealer can say yes, and simply discount the new car by $5,000 less than they otherwise would have. You drive away believing you got $34,000 for your car. You did not. You got $29,000 for your car and a $5,000 smaller discount, and the dealer's total position is identical.

Nothing about this is illegal, and it is not necessarily even dishonest. It is a negotiating structure, and it works because most buyers focus on the trade number rather than the total.

Why it matters when you are shopping around

If you take an over-allowed figure and use it as a benchmark, you are trying to beat a number that the market never supported. The retail value of your car has not changed because a dealer wrote a larger figure on a contract.

This is the single most common reason someone is disappointed by a private sale or a consignment result. They were never comparing against a real number.

How to find out what your car is really worth to the trade

Ask for a standalone purchase offer: "If I do not buy a car from you today, what will you pay me for mine, in writing?"

That number is real money the dealer will actually hand over, so it cannot be inflated, there is no new car deal to recover it from. It is the only trade figure worth using as a benchmark for anything.

The changeover test

If you would rather not have that conversation, use changeover instead. Changeover is the only number that matters: what you actually pay to swap cars, after your trade is applied.

Negotiate the price of the car you are buying to its best figure with no trade mentioned at all. Write it down. Then introduce your trade and ask for the changeover. The difference between those two numbers is what they are truly paying for your car, regardless of what the contract says.

What to do with the answer

If your standalone offer is much lower than the trade figure you were quoted, the quoted figure was an over-allowance and the deal in front of you may still be perfectly good, just make sure you are judging the total, not the trade line.

If the standalone offer is close to the trade figure, it is a genuine number, and that is the benchmark worth testing against the retail market.

General information only, current as of August 2026, and not financial, legal or tax advice. Vehicle values and market conditions change. Figures used in examples are illustrative and are not valuations or offers.