The Federal Trade Commission found that as many as 75% of buyers at one dealership group reported having add-ons tacked onto their contracts they never asked for, according to the agency’s own consumer alert on dealer add-ons. Those charges show up at the very end of the buying process, in the finance and insurance office, after the price has already been negotiated and the buyer’s guard is down. Most of them have a name, a markup that would embarrass most other industries, and one line a buyer can say to make them disappear.

Why the Finance Office Is Where the Real Money Gets Made

Car salespeople negotiate the sticker price, but the finance and insurance manager, often called the “F&I” office, is where dealerships build back their margin through add-on products sold after a buyer has already committed to the deal emotionally. The FTC’s own investigation into Asbury Automotive dealerships in Texas found staff presenting contracts on tablets angled to show only the signature line, hiding the line-item costs of the extras being added, and falsely telling buyers some of the products were required, according to the same FTC alert.

The Consumer Financial Protection Bureau has flagged a related problem on the lending side: its supervisory exams found loan servicers continuing to charge borrowers for guaranteed asset protection, or GAP, coverage even after the loan was paid off or the vehicle was repossessed, according to the CFPB’s own 2023 junk fee enforcement announcement, which led to $140 million in refunds across banking, auto lending, and remittance violations combined.

The Add-Ons, One by One

VIN etching. A technician engraves your vehicle identification number into the windows to deter theft and resale of stolen parts. The etching itself typically costs a dealer somewhere in the range of $20 to $50 to perform, while buyers are commonly charged $199 to $599 for it, a markup that persists mainly because most buyers never push back and dealers routinely drop or discount the charge the moment someone does. The line that kills it: “I’ll do my own VIN etching kit, please remove this line.”

Nitrogen tire fill. Nitrogen supposedly holds tire pressure more consistently than ordinary compressed air, which is already about 78% nitrogen to begin with. The service itself costs a dealer only a few dollars in shop time and gas, and any consumer can maintain proper tire pressure for free with a gauge and a gas station air pump. The line: “Tire pressure is something I can maintain myself, please take that off.”

Fabric and paint protection. These sealants and coatings are frequently marked up several times over the cost of a bottle of consumer-grade protectant available at any auto parts store, and manufacturers’ own paint and interior warranties already cover most of what these products claim to prevent. The line: “My factory warranty covers that, so I don’t need the add-on.”

GAP insurance. Unlike the others, GAP coverage can occasionally have real value, covering the difference between what you owe on a loan and what your totaled car is actually worth. But dealers frequently mark it up well beyond what the same coverage costs through an independent insurer or credit union, and per the CFPB’s findings, some borrowers kept getting billed for it long after the loan was gone. The line: “I’ll price GAP coverage through my own insurer or credit union before I decide.”

What the Regulators Actually Recommend

The FTC’s guidance is direct: request a printed copy of the sales and financing paperwork, confirm every line matches what was actually agreed upon, and treat any unrecognized fee as something to question rather than accept. The agency also recommends getting the full price of a vehicle in writing before financing is even discussed, since add-ons hidden inside a monthly payment figure are far easier to miss than ones itemized on a standalone invoice.

None of this means every add-on is worthless. GAP insurance can make sense for a buyer who financed a large percentage of a car’s price with little money down. What separates a legitimate purchase from a padded one is whether the buyer chose it, priced it against outside options, and saw the actual cost in writing before signing, rather than discovering it buried in a stack of paperwork at the end of a long afternoon.

Every one of these products survives on the same mechanism: present it late, price it vaguely, and count on exhaustion to do the rest of the selling.