California car-buying rules
These are the rules the Before the Lot planner uses for California, with the source and date for each. They describe the rules and the planner's estimate; they are not legal or tax advice, and the dealer's quote and your state's documents are what count.
Dealer doc fee in California
Cap: $85.
- Alternative figure: $70 if the dealer isn't a DMV private industry partner (Veh. Code 1685).
- How the figure changes: fixed.
- Law: Veh. Code 4456.5(a)(1).
A separate electronic filing charge is allowed, capped at what the dealer's DMV-system provider actually charges. Neither may be presented as a government fee. SB 766 (CARS Act, effective Oct 1, 2026) did not change the cap and lets the doc fee stay out of the advertised 'total price'. SB 791 (to raise the cap) was vetoed in October 2025.
Sales tax in California
- Tax: Sales and use tax.
- State rate used: 7.25%.
- Local add-ons: Up to 5.25% on top of the state rate.
- Dollar cap on the tax: none in the data.
Plus district taxes where the car is registered. Trade-in value is NOT deducted from the taxed price.
Your local rate
Local tax on a car goes by where the buyer lives. Find your exact rate: California official lookup (Find a Sales and Use Tax Rate (by address)).
Trade-in tax credit
No. California does not take the trade-in value off the taxed price.
Does a maker's rebate lower the taxed price?
No. Reg 1671.1(d)(5)(A): an assigned rebate is part of the dealer's gross receipts. Annotation 295.0948 (2/24/89): consumer rebate 'fully subject to tax', dealer incentive reduces the taxable price. No trade-in credit.
Cancellation and return rights
California's CARS Act (SB 766), effective October 1, 2026, gives a 3-day right to cancel a used-car purchase or lease: cars up to $50,000 and under 400 miles qualify. The form is titled "3-Day Right to Cancel Used Car Purchase or Lease".
- Restocking fee: 1.5% of the sale price, at least $200 and at most $600. A dealer that charged a shipping fee may instead keep its actual shipping cost, up to that amount. If the car was driven more than 250 miles, add $1 per mile over 250, up to $150 more, so $750 at most. The fee comes out of the refund; any shortfall is due when the buyer cancels (Civ. Code 1784.31(g), 1784.43(a)(2)).
- Refund: 48 hours after the buyer cancels. If the buyer paid by check or another method that isn't verified immediately, the dealer may wait until 2 business days after the payment is verified. The dealer also returns the trade-in, or pays its value if the trade-in has already been sold (Civ. Code 1784.43(d)).
- Total price in ads and first replies: The dealer must state the total price clearly and conspicuously in any ad that refers to a specific vehicle or quotes a monthly amount or financing term for one, and at least once in its first written response to a consumer about that specific vehicle (Civ. Code 1784.41(a)). The total price is the full sale price including any dealer price adjustment and any add-on already installed. It excludes taxes, government fees, the doc fee and the electronic filing charge (Veh. Code 11713.1(e)), and no rebate may be deducted (1784.31(j)). If the dealer quotes a monthly payment in writing, it must also disclose the total of all payments and any down payment or trade-in that total assumes. Dealers keep these communications for 2 years. Exception: used cars sold at auction.
- Optional add-ons: Whenever the dealer makes a written statement about an add-on while negotiating for a specific vehicle, it must disclose at least once, in writing and clearly and conspicuously, 'that the add-on is not required and the consumer can purchase or lease the vehicle without the add-on' (Civ. Code 1784.41(b)). If the deal is negotiated mainly in Spanish, Chinese, Tagalog, Vietnamese or Korean, the disclosure must also be in that language. The CARS Act itself requires no signature. For financed deals, the existing Civ. Code 2982.2 still requires a separate document, signed by the buyer before the contract, listing each optional item's price and the payment with and without them.
Add-ons the Act bans (Civ. Code 1784.42): Nitrogen-filled tire products or services with less than 95% nitrogen purity; Products or services that don't cover the vehicle, the consumer or the transaction; A GAP agreement that doesn't comply with Civ. Code 2982, 2982.2 or 2982.12 (e.g. priced over 4% of the amount financed, or sold when the amount financed is under 70% of MSRP or average retail value); A service contract that is void because of a preexisting condition (prior crash or flood damage, or an existing mechanical problem); Oil changes for an electric vehicle; Catalytic converter marking on a vehicle without a catalytic converter; A surface protection product that voids the manufacturer's paint warranty; Any other add-on the buyer would not benefit from (the list above is illustrative; Civ. Code 1784.42(a)).
Applies to contracts signed before Oct 1, 2026 only. Veh. Code 11713.21 required dealers to offer a paid 2-day contract cancellation option on used cars under $40,000 bought for personal use (motorcycles and RVs excluded). The option cost $75 to 1% of the price, by price band, and was credited against a capped restocking fee. Repealed Oct 1, 2026 and replaced by the free 3-day right above.
There is no federal cooling-off period for buying a car at a dealership; the FTC's door-to-door Cooling-Off Rule excludes dealers with a permanent place of business (16 CFR 429.3(a)). The FTC CARS Rule was vacated by the Fifth Circuit in January 2025 and formally withdrawn effective Feb 12, 2026 (91 FR 6507). No other state with a general used-car cooling-off right was found; NCLC calls California's the first in the nation.
Worked out-the-door example: a $35,000 vehicle
Built with the planner's own out-the-door formula: the tax is the state base rate times the vehicle price plus the doc fee, with no trade-in, rounded to the cent. Local taxes are not included.
| Line | Amount |
|---|---|
| Vehicle price (example) | $35,000 |
| Doc fee (the California cap) | $85 |
| Sales tax at 7.25% on $35,085 | $2,543.66 |
| Title and registration (the planner's default estimate) | $250 |
| Out-the-door total | $37,878.66 |
Title and registration fees differ by state and vehicle; $250 is a placeholder, not a California figure.
Plan a purchase in California
Plan a purchase in California opens the free planner with California already chosen. Nothing is sent to a server; the choice rides in the link's fragment.
These rules feed two steps of the method: set your numbers and let dealers compete. To read a dealer's quote line by line, see reading an out-the-door quote. All states.