California toll roads require payment before or after you drive, depending on which road you use

California operates toll roads through several different systems, and the way you pay depends on which road you're on. Some toll roads use transponders you mount on your windshield; others let you pay by license plate online after you drive; a few still have toll booths where you pay cash or card at the gate. The state's largest toll operator is the San Diego Association of Governments (SANDAG), which runs FasTrak lanes on I-15 and I-78. Other regions operate their own systems — the Bay Area Toll Authority runs the Golden Gate Bridge and Bay Bridge, while the Los Angeles County Metropolitan Transportation Authority manages I-110 and I-10 express lanes.

If you drive a toll road without paying, you'll receive a violation notice by mail. The fine starts at $25 to $35 but increases if you don't respond. Repeat violations can result in registration holds, meaning you won't be able to renew your vehicle registration until the toll debt is cleared.

Key Takeaways

  • FasTrak is California's main toll transponder system, used on most state toll roads, and you can set it up online or by phone before you drive.
  • Pay-by-plate systems let you pay online within a few days after driving, using your license plate number, and work on some express lanes and bridges.
  • Each toll operator has its own website and payment methods, so you need to know which road you're using to find the right payment system.
  • Unpaid tolls create a debt that can block your vehicle registration renewal, so addressing a toll violation notice quickly prevents registration problems.

FasTrak: California's main toll transponder system

FasTrak is the transponder system used on most California toll roads, including I-15 and I-78 in San Diego, I-680 in the Bay Area, and the 91 Express Lanes in Orange County. You mount a small electronic device on your windshield, and it communicates with toll readers as you pass through. The transponder deducts the toll from a prepaid account you set up online or by phone.

To get a FasTrak transponder, visit the FasTrak website (www.bayareafastrak.org for Bay Area roads, or www.sdmts.com for San Diego), create an account, and add a payment method — usually a credit card or bank account. You can order the transponder to be mailed to you, or pick one up at a customer service center. Once activated, you load money into your account, and tolls are deducted automatically as you drive. Most accounts require a minimum balance; if your account drops below that level, you'll receive a notice to add funds.

FasTrak accounts are specific to the region where you set them up. A Bay Area FasTrak won't work on San Diego toll roads, so if you regularly drive tolls in multiple regions, you may need separate accounts or a statewide option if available through your local operator.

Pay-by-plate systems for express lanes and bridges

Some California toll roads and bridges use pay-by-plate systems, which photograph your license plate as you pass through and send you an invoice by mail. You don't need to set up an account beforehand — the toll operator finds you through your registration and bills you later. This system is used on the Golden Gate Bridge, Bay Bridge, and some express lanes in Los Angeles and the Bay Area.

When you receive the invoice, you can pay online, by phone, or by mail. Payment is typically due within 30 days. If you have a transponder or are a regular user, you may be able to set up an account to receive discounted rates instead of paying the full toll each time.

Pay-by-plate is convenient if you only drive a toll road occasionally, but if you use the same road regularly, setting up a transponder account usually saves money through lower per-toll rates.

Toll booths and cash payment on older routes

A few California toll roads still operate traditional toll booths where you can pay cash, card, or check at the gate. These are less common than they once were, as most roads have converted to all-electronic tolling. If a toll booth is available on your route, you'll see signs well before the toll plaza directing you to the appropriate lane.

Cash payment at a booth typically costs more than using a transponder, because the state charges a premium for the cost of operating the booth. If you use the same road regularly, a FasTrak or pay-by-plate account will be cheaper over time.

What happens if you don't pay a toll

If you drive through a toll plaza without paying, the toll operator will photograph your license plate and mail you a violation notice within 30 days. The notice includes the toll amount plus a penalty, usually $25 to $35 for a first violation. You'll have a important date to pay — typically 21 to 30 days from the notice date.

If you don't pay by the important date, the penalty increases. A second notice may add another $25 to $35. If the debt remains unpaid, the toll operator can report it to the California Department of Motor Vehicles, which can place a hold on your vehicle registration. This means you won't be able to renew your registration until the toll debt is resolved.

If you received a violation notice by mistake — for example, you had a valid transponder but it malfunctioned — you can dispute it by contacting the toll operator listed on the notice. Bring proof of your transponder account or payment to support your case.

Finding the right toll operator for your road

California has multiple toll operators, and each manages different roads and uses different payment systems. The main operators are:

  • SANDAG (San Diego): I-15, I-78, and the 91 Express Lanes. Website: www.sdmts.com
  • Bay Area Toll Authority: Golden Gate Bridge, Bay Bridge, and regional toll roads. Website: www.bayareafastrak.org
  • Los Angeles County Metropolitan Transportation Authority: I-110 and I-10 express lanes. Website: www.metro.net
  • Caltrans: Some state toll roads. Website: www.dot.ca.gov

If you're unsure which operator manages a specific road, search the road name plus "toll" online, or call the California Department of Transportation (Caltrans) at 1-800-427-7623. They can direct you to the correct operator and payment method.

Setting up an account before your first drive

The easiest way to avoid toll violations is to set up a payment account before you drive. If you know you'll use a toll road regularly, visit the operator's website, create an account, and order a transponder or register your license plate for pay-by-plate billing. This takes 5 to 10 minutes online and prevents the hassle of receiving a violation notice later.

If you're renting a car or borrowing a vehicle, check with the owner or rental company about how tolls are handled. Some rental companies have agreements with toll operators to bill the renter automatically; others require you to set up your own account. Ask before you drive to avoid surprises.

Frequently Asked Questions

Can I pay a California toll with my phone while driving?

No, you cannot pay tolls in real time from your phone while driving. You must either have a FasTrak transponder set up beforehand, or use a pay-by-plate system and pay the invoice after you receive it by mail. Some toll operators have mobile apps to manage your account and add funds, but payment happens before or after your trip, not during it.

What if I drive a rental car on a California toll road?

Contact the rental company before you drive to ask how tolls are handled. Many rental companies have agreements with toll operators and will bill you automatically. If not, you may need to set up your own FasTrak account or pay-by-plate invoice. Some companies charge an additional processing fee for toll transactions, so ask about that too.

Do I need a separate FasTrak account for each California toll road?

It depends on the region. Bay Area FasTrak and San Diego FasTrak are separate systems, so you need different accounts if you drive both regions regularly. Some toll operators offer statewide or multi-region accounts, so check with your local operator about whether a single account can cover multiple roads.

How long does it take to receive a toll violation notice?

Toll operators typically mail violation notices within 30 days of the toll violation. The notice will include the toll amount, penalty, and a important date to pay — usually 21 to 30 days from the notice date. If you don't respond by the important date, additional penalties and registration holds may follow.

Can an unpaid toll prevent me from renewing my vehicle registration?

Yes. If toll debt remains unpaid after multiple notices, the toll operator can report it to the California Department of Motor Vehicles, which places a hold on your registration. You must resolve the toll debt before you can renew your registration. Contact the toll operator to arrange payment if you receive a registration hold notice.