California Auto Repair Shops and Credit Card Fees: What the Rules Actually Say

There is a lot of bad information circulating about the California auto repair credit card fee rules, including a version that says California shops are flatly banned from charging one. That is not what the rules say. Here is the actual position, with sources, because the real risk is not the fee itself — it is when and how you disclose it.

The short version

You can charge a card fee. What you cannot do is spring it on the customer at the counter after they have already authorized the work.

What the Bureau of Automotive Repair actually published

BAR addressed this directly in its Fall 2024 Automotive Repair and Smog Check newsletter, in an article called "Repair transaction fees." It is still live and has not been retracted.

BAR does not prohibit the fee. It opens by acknowledging that many registered auto repair dealers charge one. What it does is tell you how to handle it, and the operative sentence is this: credit card processing fees must be included in all advertising, price displays, and estimates.

BAR also points at Business and Professions Code section 9884.9(a), which says no work shall be done and no charges shall accrue before authorization to proceed is obtained from the customer. BAR's gloss on that is the part worth writing on the wall: the customer must be informed of any credit card processing fee before the shop obtains authorization to perform the repairs.

So the compliance question is about sequence. A fee that appears on the estimate the customer authorizes is disclosed. A fee that appears for the first time when they pull out a card is a charge that accrued without authorization, and that is a genuine problem under 9884.9(a).

BAR also cites California Code of Regulations title 16 section 3356(g), which prohibits separate invoice line items for generic charges like "shop supplies" and similar. A vaguely labeled fee line carries its own risk.

Where SB 478 comes in, and where the state disagrees with itself

SB 478, California's Honest Pricing Law, took effect 1 July 2024 and amended Civil Code section 1770(a)(29) to make it unlawful to advertise, display, or offer a price that does not include all mandatory fees or charges. The only carve-outs are government taxes and fees, and shipping. There is no auto repair exception. The section was amended again effective 1 January 2026, but only by the annual nonsubstantive code-maintenance bill — the rule itself did not change.

Here is the part nobody tells you. BAR and the Attorney General do not read this the same way.

The Attorney General's own published SB 478 guidance says a credit card processing fee is generally not a mandatory fee if the customer can avoid it by paying another way, such as cash — and therefore falls outside the all-in pricing requirement entirely. The AG adds that if a business accepts only cards, the fee is unavoidable and must be included in the advertised price.

BAR's newsletter states the inclusion requirement flatly, with no such qualifier.

The AG enforces SB 478. BAR regulates your license. Both matter to you, and on this specific point they are not aligned. Anyone who tells you the answer here is settled has not read both documents.

Is surcharging even legal in California?

You will still find articles listing California as a state that prohibits credit card surcharges. That framing is out of date.

Civil Code section 1748.1(a) does still say a retailer may not impose a surcharge on a customer who chooses a credit card. But in Italian Colors Restaurant v. Becerra (9th Cir. 2018) the court held the statute unconstitutional as applied to the plaintiffs, and the Attorney General's consumer guidance now states that it will generally apply that decision to similarly situated merchants. In practice, a properly disclosed surcharge is not being enforced against.

One caution that rarely gets mentioned. That case bound the Attorney General. Section 1748.1(b) still contains a private right of action, and a cardholder who makes written demand by certified mail can pursue treble damages plus attorney's fees. The state declining to enforce is not the same thing as immunity from being sued.

The structure that sidesteps most of this

Cash discounting. Section 1748.1(a) expressly permits a discount offered to induce payment by cash.

If your posted and advertised price is the card price, and you offer a discount for cash, then there is no surcharge being imposed and no additional mandatory fee being added on top of an advertised number. The advertised price already includes everything, which is precisely what SB 478 asks for. The discount has to be offered to all customers, and you cannot misrepresent what you are doing — but structurally, this is the cleaner path and it is where most compliance advice lands.

The rule that applies everywhere

Debit and prepaid cards can never be surcharged. Not in California, not anywhere. This comes from Visa and Mastercard's own published merchant rules, not from a statute, so the penalty is fines and potential loss of card acceptance rather than a legal one. Both networks also cap surcharges at 4%, require the surcharge not exceed your actual cost of acceptance, require it to appear as a separate line on the receipt, and require thirty days' advance notice to the network and your acquirer before you start.

That last one catches people. If a salesperson set up your surcharge program and nobody filed the notice, the program is out of compliance with the network rules from day one — regardless of what any state says.

What to do this week

Pull an estimate and a final invoice from the same job. Is the card fee on the estimate the customer signed, or does it appear for the first time on the invoice? If it is the second one, fix that before anything else — it is the clearest exposure you have and it costs nothing to correct.

Then check whether the thirty-day network notice was ever filed, and whether debit cards are being surcharged. Both are common and both are on you, not on the salesperson who set it up.

And work out what you actually pay to accept a card before deciding what to pass along: every dollar of processing cost on the statement divided by total card volume. Our free rate checker does that in a couple of minutes.

This is general information, not legal advice. Surcharging rules change, vary by state, and — as this page shows — California agencies do not currently agree on every point. Talk to your own counsel before changing how you price.