California Vehicle Code 23123.5 prohibits drivers from holding and operating a phone, tablet, or similar wireless device behind the wheel. You can use a device only if it’s mounted and you’re limited to a single tap or swipe. Base fines start at $20 for a first offense and $50 for each one after, but California’s penalty assessments push the real cost past $150 on a first ticket and past $250 on a second.
What the Law Prohibits
The rule reaches further than phone calls. You cannot drive while holding and operating a handheld wireless telephone or electronic wireless communications device, which covers smartphones, tablets, laptops with mobile data, pagers, and similar gadgets. The only lawful way to use one of these while driving is voice-operated, hands-free.1California Legislative Information. California Code Vehicle Code 23123.5
“Operating” carries most of the weight in the statute. You don’t have to be on a call to be cited. Scrolling a playlist, reading a text, or pulling up directions all count. If the device is in your hand while you do it, that’s a violation.
Mounted Device and the Single-Touch Rule
The statute allows one narrow interaction: a single tap or swipe on a device that’s mounted to your windshield, dashboard, or center console.2California Legislative Information. California Code VEH 23123.5 The device cannot sit loose on the seat or in your lap. And the touch has to activate or deactivate a feature in one motion. Typing an address, scrolling messages, or any interaction that takes more than one touch falls outside the exception.
Windshield mounts have their own placement rules under Vehicle Code 26708, which limits where objects can sit on the glass and requires you to stay clear of the airbag deployment zone.3California Legislative Information. California Code VEH 26708 Dashboard and center console mounts are fine as long as the device doesn’t block your view.
The practical version: buy a mount, set your navigation before you pull away, and don’t touch the screen once you’re moving beyond a single tap to accept a call or dismiss a prompt.
Factory-Installed Systems Are Outside the Statute
Manufacturer-installed systems built into the vehicle aren’t covered.1California Legislative Information. California Code Vehicle Code 23123.5 Your car’s built-in touchscreen for navigation, climate, or media is outside 23123.5. The exemption covers what came from the factory, not aftermarket units you install later.
Red Lights and Stopped Traffic Still Count
Being stopped doesn’t put you in the clear. In People v. Nelson (2011), the Court of Appeal held that a driver paused at a traffic light was still “driving” for purposes of the cell phone statutes.4Justia. P. v. Porter The law doesn’t apply when your vehicle is lawfully parked. But idling in traffic, waiting at a red, or sitting in a drive-through lane all count as driving.
Who Gets an Exception
Section 23123.5 exempts emergency services professionals operating an authorized emergency vehicle in the course of their duties. Police, firefighters, and paramedics on duty fall into that category.2California Legislative Information. California Code VEH 23123.5
A common assumption is that regular drivers can hold a phone to dial 911 under this section. That exception is not in 23123.5. It appears in the older statute, Vehicle Code 23123, which addressed holding a wireless telephone to your ear.5California Legislative Information. California Code Vehicle Code 23123 In a genuine emergency, an officer is unlikely to cite you for calling for help, but the text of 23123.5 itself doesn’t provide that safe harbor.
Stricter Rules for Drivers Under 18
Teen drivers face a near-total ban. Vehicle Code 23124 prohibits minors from using a wireless telephone or electronic wireless communications device while driving, even hands-free.6California Legislative Information. California Code VEH 23124 The single-tap-on-a-mounted-device allowance for adults doesn’t extend to minors.
The minor-driver statute does include an emergency call exception. A driver under 18 may use a phone for emergency purposes, including calls to law enforcement, a health care provider, or the fire department.6California Legislative Information. California Code VEH 23124 Fines mirror the adult schedule: $20 base for a first offense and $50 for each after. An officer cannot pull over a minor solely to check for a 23124 violation, though a stop for any other traffic violation opens the door.
What the Ticket Actually Costs
The base fine is $20 for a first offense and $50 for each subsequent offense.1California Legislative Information. California Code Vehicle Code 23123.5 Those figures are misleading on their own. California adds mandatory surcharges to every traffic fine: state penalty assessments, court construction fees, DNA fund penalties, county penalties, a 20% state surcharge calculated per $10 of base fine, and separate court operation and conviction assessments on top.7California Courts. Uniform Bail and Penalty Schedules
The result: a $20 base fine lands somewhere around $150 to $165 total, and a $50 base fine can push past $250. Exact numbers vary by county because local penalty assessments differ. Whatever the county, the amount on the ticket runs several times higher than the posted base fine.
Points on Your Driving Record
A first conviction under 23123.5 does not add a point to your driving record. A second or subsequent conviction within 36 months of a prior conviction for the same offense does add one point.8California Legislative Information. California Code Vehicle Code 12810.3 That point can raise your insurance premiums and contributes toward the DMV’s negligent-operator thresholds, which can lead to a license suspension if you accumulate too many points in a short window.
Commercial Drivers Face Federal Penalties Too
If you hold a commercial driver’s license, federal rules stack on top of the state fine. The Federal Motor Carrier Safety Administration prohibits hand-held mobile phone use while operating a commercial motor vehicle, with fines up to $2,750 for the driver and up to $11,000 for an employer that allows or requires the behavior.9Federal Motor Carrier Safety Administration. Mobile Phone Restrictions Fact Sheet Multiple cell phone violations while driving a commercial vehicle count as serious traffic violations, which can lead to CDL disqualification: 60 days after a second offense and 120 days after a third.10Federal Motor Carrier Safety Administration. Electronic Devices/Mobile Phones For a driver whose income depends on the CDL, even a small number of tickets can end a career.
Civil Liability After a Crash
The criminal fine is the smaller half of the risk. Under California Evidence Code 669, violating a safety statute creates a legal presumption that you failed to exercise due care.11California Legislative Information. California Evidence Code 669 If you were holding your phone in violation of 23123.5 and caused a collision, a court can presume you were negligent without the injured person having to prove careless driving through other evidence.
The presumption is rebuttable, so you can try to overcome it, but you’re starting from behind. The injured party still has to show that your violation actually caused their injuries, and that becomes easier when you were breaking a statute designed to prevent the exact type of accident that happened. If you were driving for work at the time, your employer can face liability as well under the doctrine of respondeat superior. Phone records, dashcam footage, and crash reconstruction evidence make these cases increasingly straightforward for plaintiffs to prove.