In effect since October 1, 2026
The CARS Act is the biggest change to how cars are sold in California in twenty years. Dealers now have to show you the real price up front, put in writing that add ons are optional, stop charging for junk extras, and let you hand back a used car within three days.
Here is what the law says, who it covers, and how to use it next time you are at a dealership.
The CARS Act (California Combating Auto Retail Scams Act, Senate Bill 766) is a California law that took effect October 1, 2026. It requires dealers to disclose a vehicle's total price in ads and first written replies, state in writing that add ons are optional, bans add ons that give you no benefit, and gives used car buyers a 3 day right to cancel on vehicles priced at $50,000 or less.
The name comes from a federal rule. In January 2024 the Federal Trade Commission adopted its own CARS Rule to crack down on bait pricing and hidden fees at dealerships. In January 2025 the Fifth Circuit Court of Appeals threw it out on procedural grounds before it ever took effect.
California didn't wait for Washington to try again. Senator Ben Allen introduced SB 766 less than a month later, it passed both chambers easily, and Governor Gavin Newsom signed it on October 6, 2025. Lawmakers gave dealers almost a year to rework their ads, contracts, and signs, which is why it only switched on today.
The California version goes further than the federal rule ever did. It keeps the pricing and add on rules and adds something the FTC never proposed: a free cooling off period on used cars. The law now sits in the California Civil Code, sections 1784.20 through 1784.44.
Most of the law targets the same thing: the gap between the price you see online and the number you sign at the finance desk. These are the rules every California dealer now has to follow on new and used sales and leases.
Any ad that mentions a specific vehicle, or a price or payment for one, must show its total price. So must the dealer's first written reply to you about a car, like an email or text. Total price includes dealer markups and anything already installed on the car. Taxes and government fees can be left out, and rebates can't be used to shrink it.
If a dealer talks about a service contract, GAP, paint protection, or any other extra in writing, it has to say at least once, clearly, that you can buy or lease the car without it. If you negotiate mainly in Spanish, Chinese, Tagalog, Vietnamese, or Korean, that notice has to be in your language too.
Quote a monthly payment in writing and the dealer must also show the total you will pay over the whole term, plus any down payment or trade in the number assumes. Pitch a lower payment and they have to tell you lower payments often cost more overall.
It is now a violation to mislead you on costs, financing terms, add ons, if you are signing a lease or a purchase, being "preapproved," what happens to your down payment or trade in if a deal falls through, and when your old loan gets paid off.
The law bans charging for any add on that gives you no real benefit, and dealers have to keep records proving the products they sell actually help the buyer. The statute names these examples:
That list is not the limit. Any extra that delivers nothing to the buyer is fair game for a complaint.
This is the part most buyers will notice. Before today, California used car buyers could only return a car if they paid extra for a 2 day contract cancellation option. Most people didn't. The CARS Act scraps that and replaces it with an automatic, free right to cancel.
Dealers must print a warning about this on the first page of the contract and hand you a separate form titled "3 Day Right to Cancel Used Car Purchase or Lease." Stalling, discouraging you, claiming the person who handles refunds "isn't here," or inventing damage are all violations.
A guide based on Civil Code 1784.43, not legal advice. If the last day falls on a day your dealer is closed, you get until close of business the next day it opens.
Side by side, here is how the deal changes for buyers.
| Topic | Until September 30, 2026 | From October 1, 2026 |
|---|---|---|
| Returning a used car | Only if you bought a 2 day cancellation option, on cars under $40,000 | Free 3 day right to cancel on used cars $50,000 or less |
| Advertised price | Could lead with MSRP plus a disclaimer | Must show the total price, including installed extras and markups |
| First email or text about a car | No price required | Must include the total price |
| Add ons | Often bundled or preinstalled with little explanation | Must be stated in writing as optional; worthless add ons banned |
| Monthly payment quotes | Payment alone was enough | Must show the total cost over the full term |
| Dealer records | Standard contract retention | Two years of records proving compliance, including ads and messages |
The pricing, add on, and disclosure rules apply to California licensed dealers selling or leasing light duty vehicles to consumers, new and used. The 3 day return is narrower.
This is the bit I care about most. The total price now has to include everything already installed on the car. That pulls dealer fitted extras like etching, door edge guards, nitrogen, and ceramic coatings out of the fine print and into the number you see on the listing.
It does not tell you what those extras are worth. A dealer can still list a used car at a premium because it is "fully loaded," and the CARS Act won't stop them. What it gives you is a clean, written total to check against.
So check it. Run the car through the free spec check and tick the factory options the seller is advertising. You will see what each one adds to the car's value today, not what the first owner paid. If the premium on the listing is way above that number, you have something to push back on before you sign, not after.
I spent years building depreciation and option value models at CAP HPI. The pattern never changes: dealer add ons almost never hold value at resale, and factory options vary wildly. A transparent price is a great start. Knowing which parts of that price are real value is the other half.
Dale Ogden, founder of Check Your Spec
Five steps, in the order you will need them.
The total price in the ad and in the dealer's first email or text should match what you are asked to pay. Keep both. You can request a copy of that first message in writing for two years.
Run the VIN through our free VIN lookup to confirm what the car actually is and spot open recalls. Then use the spec check to see what the advertised options are really worth.
If anyone says GAP, a service contract, or a protection package is "required," ask them to put it in writing. The law says they have to tell you in writing that it isn't.
Get an independent mechanic to look at it straight away, keep your driving under 400 miles, and note the exact deadline. Three calendar days goes quickly.
Return the car during business hours. The dealer must give you an itemized receipt showing the date and time you cancelled and every deduction they took.
For California dealers the work is mostly process. Every ad and online listing needs a compliant total price. Sales teams need a way to make sure the total price goes out before or with the very first written message to a customer. The F&I menu needs the optional notice, in the right language, and the add on lineup needs a hard look for anything that delivers no benefit.
Used car departments carry the most risk. Selling a trade in during a customer's three day window means owing them the highest of three values if they cancel, so many stores are holding trade ins until the window closes. Old "no cooling off" signs need replacing, and records covering ads, messages, contracts, cancellations, and complaints have to be kept for two years.
If you run a dealership and want your option pricing backed by real resale data, take a look at what we do for dealerships.
No. It only covers California dealers. With the federal CARS Rule gone, buyers in Texas, Florida, and most other states still have no automatic right to return a car from a dealer, and the FTC's door to door cooling off rule doesn't cover dealership sales. State deceptive trade practice laws still apply, and consumer groups are already pushing other states to copy California, so expect this to spread.
The California Combating Auto Retail Scams (CARS) Act, Senate Bill 766, is a state law that took effect October 1, 2026. It makes California dealers show the total price of a vehicle up front, tell buyers in writing that add ons are optional, stop charging for add ons that give the buyer no benefit, and give used car buyers a 3 day right to cancel on vehicles priced at $50,000 or less.
October 1, 2026. Governor Newsom signed SB 766 on October 6, 2025, and the start date was delayed to give dealers time to update forms, ads, and training.
Yes, if you bought or leased a used vehicle priced at $50,000 or less from a California dealer. You have three calendar days starting the day after you sign. You must return it in person in the same condition, and you lose the right if you drive more than 400 miles. The dealer can charge a restocking fee of 1.5% of the price, with a $200 minimum and $600 maximum, plus $1 per mile over 250 miles, capped at $150.
The pricing, add on, and disclosure rules apply to new and used vehicle sales and leases. The 3 day right to cancel only applies to used vehicles priced at $50,000 or less.
Dealers cannot charge for add ons that give the buyer no benefit. Examples in the law include oil changes for an electric vehicle, nitrogen tire fills under 95% purity, catalytic converter markings on a car with no catalytic converter, a service contract that is void because of preexisting damage, a GAP agreement that does not comply with California law, and paint protection that voids the factory paint warranty.
No. The FTC CARS Rule was a federal rule that a federal appeals court vacated in January 2025 before it took effect. The California CARS Act is a separate state law modeled on it, with an added 3 day right to cancel on used cars. It only applies to California dealers.
No. It covers California licensed dealers. Buyers in other states generally have no automatic right to return a car, although state consumer protection laws still apply.
This page is based on the statute text in the California Civil Code, Title 1.5B, the SB 766 bill history, and the California DMV's CARS Act guidance page. You can report a violation to the California Attorney General or the DMV.
This is general information about California Civil Code sections 1784.20 through 1784.44 as of October 1, 2026, not legal advice. Courts and regulators have not interpreted the new law yet. Talk to a licensed California attorney about your own deal.
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