Car Buying Glossary
Common terms you'll run into while shopping, financing, or researching a car — explained in plain English.
APR (Annual Percentage Rate)
The yearly cost of a loan expressed as a percentage, including interest and most lender fees. A lower APR means less paid in total interest over the life of the loan.
Depreciation
The loss in a vehicle's value over time. It's usually the single largest cost of owning a car, even though it never shows up as a monthly bill.
Doc Fee (Documentation Fee)
A charge from the dealer for processing paperwork. It's often negotiable and varies significantly by state and dealership — always ask what it covers.
GAP Insurance (Guaranteed Asset Protection)
Covers the difference between what you owe on a loan and what your insurer pays out if the car is totaled, since a car's loan balance can exceed its actual value early in a loan.
MSRP (Manufacturer's Suggested Retail Price)
The sticker price set by the manufacturer. Actual transaction prices are often lower after negotiation, incentives, or discounts — which is why real market data differs from MSRP.
Residual Value
The estimated value of a vehicle at the end of a lease term, set by the leasing company in advance. It directly determines your monthly lease payment.
Total Cost of Ownership (TCO)
The full cost of owning a vehicle over a period of time — including depreciation, fuel or electricity, insurance, maintenance, repairs, financing, and taxes — not just the purchase price or monthly payment.
Trade-In Value
What a dealer offers for your current vehicle toward a new purchase. It's typically lower than what you'd get selling privately, in exchange for convenience.
Upside Down / Underwater (on a loan)
Owing more on a car loan than the car is currently worth — common in the first year or two of ownership because of fast early depreciation.