Start with one itemized total
Ask for a written out-the-door price for the particular vehicle you are considering. Keep that quote separate from the discussion about how you will pay. A monthly payment can change with the down payment, trade, rate, or loan term without telling you which charges changed.
The FTC recommends getting the out-the-door price in writing before visiting a dealer. Its used-car guidance also describes optional products such as VIN etching and service add-ons. A product on a worksheet deserves its own explanation and price; a familiar-sounding name does not tell you whether you need it.
Put each line in the right place
Keep vehicle price, discounts, dealer products, dealer fees, taxes, and title or registration in separate groups. Ask who receives a charge and what it covers. Taxes and government fees depend on the transaction and jurisdiction; the calculator does not verify the legal amount.
A dealer documentation or processing fee belongs in a different group from government registration. Whether a particular fee is negotiable, capped, or mandatory depends on the circumstances. If the dealer will not change one line, compare the complete written total rather than assuming the label settles the value of the offer.
A worked example
These invented figures show the arithmetic, not typical or recommended fees. Assume no trade and no cash down. The selling price is before the separately listed discount.
| Quote line | Amount |
|---|---|
| Vehicle selling price | $30,000 |
| Dealer discount | −$1,000 |
| Protection product | +$900 |
| Dealer documentation fee | +$600 |
| Entered tax | +$1,800 |
| Title and registration | +$300 |
| Itemized total | $32,600 |
The $1,000 discount reduces the price, while the listed charges add $3,600. The total is $32,600. If the $900 product is removed and every other entered amount stays the same, the arithmetic total becomes $31,700. In a real revised quote, tax or another dependent amount may change too—use the replacement figures.
Avoid counting the same amount twice
Check whether the selling price already includes a discount. Entering that discount again makes the estimate too low. Similarly, do not add the out-the-door total as another fee after entering its component lines.
In Car Deal Check, enter the itemized values in the manual calculator. If the worksheet separately shows an amount financed, enter that too. A difference between the two totals is a reason to reconcile the worksheet, not proof that a charge is fraudulent.
Questions to take back to the dealer
- Which products are optional, and what does each include?
- Can you provide a revised written total with the products I decline removed?
- Who receives each government-related charge, and how was it calculated?
- Do the selling price and discount lines overlap?
- Will these same charges appear in the final contract?