Why is my airport rental car double the price I was quoted?

The daily rate you booked is real. What sits on top of it is a stack of separate charges, most of which have nothing to do with the rental company and cannot be negotiated away. Here is what each one actually is.

The Customer Facility Charge

San Diego International charges $9.00 per day, capped at five days per rental contract. That cap matters: whether you rent for five days or five weeks, the most this charge can add is $45.

It pays for the Rental Car Center and the shuttle buses that run to it — the airport built a consolidated facility to get rental traffic off the terminal curb, and this is how it is being paid for. The airport collected $36.5 million in facility charges in the year to 30 June 2025.

The airport concession fee

This is the one that annoys people most, because you cannot look up the rate. California Civil Code 1939.01 defines it as "the renter's proportionate share of the amount paid by the rental company to the owner or operator of an airport for the right or privilege of conducting a vehicle rental business on the airport's premises." In other words, the airport charges the rental company rent, and the rental company passes your slice of it to you.

The law requires it to be separately stated and disclosed in your quote and on your contract. It does not require anyone to publish the percentage. We checked the Airport Authority's own financial disclosures and the San Diego location pages for Enterprise, Budget and Fox: none of them states the rate. The figures circulating on travel blogs are not sourced. The only place you will see your actual number is on the itemized quote at booking.

The statewide charges

The tourism assessment and the vehicle license fee recovery follow you anywhere in California. The license fee recovery is a pass-through of the state Vehicle License Fee the rental company pays to register its fleet; the statutes require it to be disclosed but set no dollar cap or formula we could find, so it is worth reading on the quote.

Does renting off-airport help?

Less than people think, and the law anticipated the dodge. Government Code 50474.3 expressly allows a facility charge to be collected from customers of off-airport companies who ride the airport's shared shuttle — a reduced one covering the bus share. Only a genuinely independent neighborhood branch, reached under your own steam, escapes both the facility charge and the concession fee. The statewide tourism assessment and sales tax apply wherever you rent.

One right you do have

Civil Code 1939.19 bars a rental company from charging mandatory add-ons beyond the disclosed rate and taxes, and specifically bars an additional-driver fee for your spouse or a coworker traveling with you. If a counter agent tries to add one, that is the section to cite.