What the 405 Express Lanes are and how payment works

The 405 Express Lanes are toll lanes on Interstate 405 in Los Angeles County that let you skip regular traffic by paying a variable toll. The toll changes throughout the day — it's higher during peak commute times and lower during off-peak hours. You don't stop at a booth; the toll is charged automatically to an account linked to your vehicle's license plate.

The lanes run from the 101 Freeway in the north to the 605 Freeway in the south, a distance of about 16 miles. They're open to all vehicles, but carpools with three or more people (including the driver) and certain clean-air vehicles can use them for free during designated hours. Solo drivers and two-person carpools must pay the toll to enter.

Payment happens through your FasTrak account, which is the toll collection system used across California. When you drive through an Express Lane, a reader scans your license plate or FasTrak transponder, and the toll is deducted from your prepaid account balance. If you don't have an account set up before you use the lanes, you'll receive a toll bill in the mail.

Key Takeaways

  • You need a FasTrak account to pay tolls on the 405 Express Lanes; without one, you'll receive a bill by mail with late fees added.
  • Tolls vary by time of day and traffic conditions, ranging from about $0.50 to $1.50 per trip, though prices can go higher during extreme congestion.
  • You can set up a FasTrak account online, by phone, or by mail, and you can use the same account on other toll roads throughout California.
  • Carpools with three or more occupants and certain electric or hybrid vehicles travel free during specific hours; solo drivers and two-person carpools always pay.
  • If you receive a toll bill in the mail, you can set up an account retroactively, though late fees will explore to unpaid tolls.

Opening a FasTrak account for the 405 Express Lanes

To pay tolls on the 405 Express Lanes, you need to open a FasTrak account before or shortly after your first trip. You can set up an account through the official FasTrak website (www.thetollroads.com), by calling 1-888-FASTER-1 (1-888-327-8371), or by mail. The online route is fastest — it takes about 10 minutes and you can start using the lanes when ready.

When you open an account online, you'll provide your vehicle's license plate number, your name, address, and payment method (credit card, debit card, or bank account). You'll also choose how much money to prepay into your account; most people start with $25 to $50. FasTrak will then set up your account, and your license plate becomes your toll tag. You don't need to install anything in your car.

If you prefer to open an account by phone, a representative will walk you through the same information and can process your payment over the phone. By mail, you'll fill out a form and send it with a check or money order. Mail processing takes longer — usually one to two weeks — so this method is less common for people who plan to use the lanes soon.

How tolls are charged and what the costs are

Tolls on the 405 Express Lanes are dynamic pricing, meaning they change based on traffic flow. During heavy congestion, tolls go up to keep traffic moving. During light traffic, tolls drop. The system aims to maintain a steady speed of about 45 miles per hour in the Express Lanes, even when regular lanes are crawling.

A typical toll for a single trip ranges from about $0.50 to $1.50, but during peak rush hours or special events, tolls can climb to $2.00 or higher. The toll is calculated based on the distance you travel in the Express Lanes and the current congestion level. If you enter at one point and exit at another, you pay one toll for that segment. If you re-enter later, that's a separate toll.

Your FasTrak account balance is checked each time you use the lanes. If your balance drops below $5, you'll receive an email or text alert (depending on how you set up notifications). When your balance reaches zero, you can't use the Express Lanes until you add more money. You can add funds online, by phone, or by setting up automatic replenishment so money is added when your balance falls below a certain amount.

What happens if you use the lanes without an account

If you drive through the 405 Express Lanes without a FasTrak account, the toll reader will capture your license plate number. Within about two weeks, you'll receive a toll bill in the mail from the Los Angeles County Metropolitan Transportation Authority (Metro). The bill will show the toll amount plus a processing fee — typically $2.00 to $3.00 per unpaid toll.

You have several options when you receive the bill. You can pay it when ready by check, money order, or online through the Metro website. You can also open a FasTrak account at that time and link it to your license plate; Metro will credit any payment you've already made toward your new account. If you dispute the toll (for example, if you believe you weren't actually in the Express Lanes), you can request a review through Metro's customer service.

If you don't pay the bill and don't respond to follow-up notices, Metro can refer the debt to a collection agency, and it may affect your credit. Additionally, if you renew your vehicle registration with unpaid tolls on your record, the California Department of Motor Vehicles may place a hold on your registration. For this reason, it's much simpler to set up a FasTrak account before your first trip.

Free or discounted travel for carpools and clean-air vehicles

If you're driving a carpool with three or more people (including the driver), you can use the 405 Express Lanes for free during designated hours. Free carpool hours are typically 5:00 a.m. to 10:00 a.m. and 3:00 p.m. to 7:00 p.m. on weekdays. Outside these hours, carpools with three or more occupants still pay the toll. Two-person carpools always pay the toll.

Certain clean-air vehicles — specifically plug-in hybrid electric vehicles (PHEVs) and battery electric vehicles (BEVs) — can also travel free during carpool hours, even if you're driving alone. To may have access to, your vehicle must be registered in California and you must have a valid FasTrak account. You'll need to register your vehicle as a clean-air vehicle through FasTrak's website and request a special transponder or license plate designation.

To use the free carpool benefit, you don't need to do anything special — just make sure all three or more occupants are in the vehicle when you enter the lanes. The toll reader will count the occupants or read your transponder. If you're using a clean-air vehicle, you'll need the special designation on your account so the system recognizes you as may be able to access for free travel.

Managing your account and checking your balance

Once your FasTrak account is open, you can manage it online through the FasTrak website or through their mobile app. You can check your current balance, view your recent toll transactions, update your payment method, add funds, and change your notification preferences. The website shows each toll you've paid, the date and time, and the amount, so you can track your spending.

You can set up automatic replenishment so that when your balance falls below a threshold you choose (typically $5 or $10), money is automatically added from your payment method. This prevents you from running out of funds and having to pay processing fees on a toll bill. Most people set automatic replenishment to add $25 or $50 at a time.

If you change vehicles, you can update your license plate in your FasTrak account. If you sell your car or it's no longer registered, you should remove the old plate from your account to avoid receiving bills for tolls charged to that plate. You can also close your account entirely if you no longer plan to use toll roads in California, though you can reopen one at any time.

What to do if you have questions or disputes

If you have questions about a specific toll charge, your account balance, or how the Express Lanes work, you can contact FasTrak customer service by phone at 1-888-FASTER-1 (1-888-327-8371). They're available Monday through Friday, 7:00 a.m. to 7:00 p.m., and Saturday 9:00 a.m. to 4:00 p.m. Pacific Time. You can also submit questions through the FasTrak website's online contact form.

If you believe a toll charge was incorrect — for example, if you weren't actually in the Express Lanes or if you were charged twice for the same trip — you can request a review. Have your transaction details ready (the date, time, and toll amount). FasTrak will investigate and either confirm the charge or issue a refund. This process typically takes one to two weeks.

If you received a toll bill in the mail and want to dispute it, you can respond to the bill with an explanation and request a review from Metro. Include any evidence you have, such as photos showing you weren't in the Express Lanes or documentation of a vehicle malfunction. Metro will review your dispute and contact you with a decision.

Frequently Asked Questions

Can I use my FasTrak account on other toll roads in California?

Yes. Your FasTrak account works on toll roads throughout California, including the 91 Express Lanes in Orange County, the I-680 and I-880 in the Bay Area, and the I-15 in San Diego County. You use the same account and prepaid balance for all of them, so you only need to set up one account.

What if my license plate is obscured or unreadable?

If your license plate is dirty, damaged, or obscured, the toll reader may not capture it correctly. You should request a FasTrak transponder (a small device you mount on your windshield) instead of relying on license plate reading. You can order one through your FasTrak account or by calling customer service. The transponder is more reliable and ensures tolls are charged to your account.

Do I have to use the 405 Express Lanes, or can I stay in the regular lanes?

The Express Lanes are optional. You can always use the regular free lanes on Interstate 405. The Express Lanes are an option for drivers who want to pay for faster, less congested travel during peak times. If you don't want to pay tolls, straightforward stay in the regular lanes.

What happens if I accidentally enter the Express Lanes without an account?

Your license plate will be read, and you'll receive a toll bill in the mail within two weeks, including a processing fee. You can pay the bill, or you can open a FasTrak account and link it to your license plate. If you open an account, Metro will credit any previous payment toward your new account balance.

Can I get a refund if I overpaid my FasTrak account?

Yes. If your account has a balance remaining and you no longer plan to use toll roads, you can request a refund through FasTrak's website or by calling customer service. Refunds are typically processed within two to four weeks and sent to the payment method you used to fund the account.