Supervising a New Driver in California: Parent's Guide
If your teen is going through California's graduated licensing system, your supervised-driving role is built into the law. Here's what your teen needs to log, what restrictions apply, and where parents most commonly slip up.
If you're the parent or guardian signing for a teen driver in California, the rules that follow are aimed at you. The manual is written to the learner, and the learner will take the test. But the paperwork you sign, the practice hours you ride, and the seat next to the driver all belong to you.
Signing the application
When your teen applies for a Class C instruction permit under age 18, a parent or legal guardian has to sign the application. That signature does two things. It approves the application, and it accepts financial responsibility for the driver. If two parents share joint custody, both signatures are required.
Financial responsibility is the piece worth understanding before you sign. Your signature makes you responsible along with the minor for damages the driver causes in a collision, up to the limits California sets by statute for a signer's exposure. On the day the teen turns 18, the shared responsibility that came with your signature ends going forward. Until then, a collision your teen causes is one your insurance is exposed to.
You also have a lever you may not know about. A parent or guardian can cancel a minor's driver's license by filing a Request for Cancellation or Surrender of a Driver License or ID Card form with DMV. It's a real option, and knowing it exists is part of the job.
The supervised practice window
Once the instruction permit is issued, it can't be used until behind-the-wheel training begins with a licensed instructor who validates the permit. That's when practice at home begins.
From then until the drive test, the teen has to log at least 50 hours of practice with a California-licensed driver who is at least 25 years old. Ten of those 50 hours must be at night. The supervising driver has to sit close enough to take control of the vehicle if needed, which in practice means the front passenger seat with a hand near the wheel and a foot ready near the driver.
Fifty hours sounds like a lot until you count how many everyday trips fit into it. The hours add up if practice starts in the first weeks of the permit, not the last.
Night hours are easy to shortchange. California requires ten because night driving is a different skill: headlights change what you can see, oncoming lights create glare, and pedestrians and bicyclists get harder to spot. Save the freeway and the unfamiliar routes for daytime practice. Use the night sessions on the roads your teen already knows, so the only new variable is the light.
What a good supervising driver does
You're not a driving instructor, and you don't need to be. Your job during practice is narrower. Look further down the road than the teen does, name what you're seeing before it becomes a problem, and let them make the small mistakes that don't cost anything.
Talk about the why, not the what. "Ease off the gas because that light has been green a while" teaches something. "Slow down" teaches nothing they didn't already hear from the traffic in front of them.
Save the debrief for after the drive, when the car is parked. A correction shouted mid-turn tends to make the next turn worse.
After the license: the provisional year
When your teen passes the drive test, the license they receive is provisional. It's a full California license, but it carries two restrictions during the first 12 months. The chapter Graduated Driver Licensing in California walks through the details; the short version is that the teen can't drive between late night and early morning hours during the first year, and can't carry passengers under age 20 unless a parent, guardian, or California-licensed driver 25 or older is in the vehicle. Graduated Driver Licensing in California
Both restrictions have narrow exceptions. Each exception requires a signed note the driver must carry in the vehicle. For work, the note comes from the employer. For school activities, from the principal, dean, or designee. For medical need, from a physician stating the condition and the expected recovery date. For carrying an immediate family member, from you, stating the reason and the end date.
The note is not a suggestion. If a law-enforcement officer stops the teen during a restricted time or with a restricted passenger, the note is what keeps the stop from turning into a citation. Keep a copy in the glove box for each active exception. Refresh it when the reason changes and remove it when the reason ends.
What happens if things go wrong
California gives DMV specific authority to act against a minor's driver's license after collisions or violations during the first year of licensure. The steps escalate in a way worth knowing before it happens.
One at-fault collision or one traffic-violation conviction brings a warning notice from DMV. Two at-fault collisions, two violations, or one of each locks the teen out of driving for 30 days unless a licensed adult at least 25 years old rides in the passenger seat. Three collisions or convictions, or any combination reaching three, suspends the license for six months and puts the teen on probation for the following year.
Turning 18 does not clear any of this. A restriction, a suspension, or a probation term that starts before the 18th birthday runs through it.
The conversations worth having early
A few things are worth putting on the table before the license arrives, not after.
The passenger rule is the one worth talking through first. It's designed to separate new drivers from carloads of other new drivers, and that's exactly the trip teens most want to make. Decide together how the family handles rides with friends, and be specific: whose car, whose supervising adult, what time home.
The phone is the second. California bans handheld phone use for every driver. For drivers under 18, the ban is total, with an exception only for emergency calls. The chapter Distracted Driving and Phones has the details. Distracted Driving and Phones The rule you can make at home is stricter than the law: phone in the glove box before the engine starts, out only when the car is parked.
Alcohol is the third. California's under-21 BAC limit is 0.01 percent, which is essentially any measurable alcohol in the bloodstream. The chapter Alcohol, Drugs, and Implied Consent walks through what a first offense costs and what implied consent means. Alcohol, Drugs, and Implied Consent The number worth memorizing as a parent is 0.01. There is no drink small enough to be safe under it.
Manual reference: California Driver Manual, Section 2 (Getting an Instruction Permit and Driver's License) and Section 7 (Maintaining Your Minor's Provisional Driver's License).
GDL stages and supervised-driving requirements
- Earliest permit age
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15 years 6 months
Source: California Driver's Handbook (2025), Section 2: Applying For An Instruction Permit, p. 3.
- Permit holding period (months)
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6
Source: California Driver's Handbook (2025), Section 2: Applying For A Driver's License, p. 3.
- Supervised driving hours required
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50
Source: California Driver's Handbook (2025), Section 2: Applying For A Driver's License, p. 3.
- Of which, night hours
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10
Source: California Driver's Handbook (2025), Section 2: Applying For A Driver's License, p. 3.
- Earliest intermediate license age
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16
- Intermediate curfew: start time
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11:00 p.m.
Source: California Driver's Handbook (2025), Section 2: Minor's Restrictions and Exceptions, p. 4.
- Intermediate curfew: end time
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5:00 a.m.
Source: California Driver's Handbook (2025), Section 2: Minor's Restrictions and Exceptions, p. 4.
- Intermediate passenger restriction
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During the first 12 months a provisional driver holds the license, they may not drive with any passenger under age 20 unless a parent or guardian, or another California-licensed driver at least 25 years old, is riding in the vehicle. Exceptions require a signed note the driver must carry: from a physician (medical need with recovery date), from the school principal, dean, or designee (schooling or school activities), from an employer (work reasons), or from a parent or legal guardian (transporting an immediate family member, with the reason and the end date). A parent or guardian may also cancel a teen's license entirely by filing a Request for Cancellation or Surrender of a Driver License or ID Card form.
Source: California Driver's Handbook (2025), Section 2: Minor's Restrictions and Exceptions, p. 4.
- Earliest full license age
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17
Source: California Driver's Handbook (2025), Section 2: Minor's Restrictions and Exceptions, p. 4.
- Minimum age: learner permit
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15 years and 6 months. An applicant under 18 must also complete a driver education program and have a parent or guardian sign to approve the application and accept financial responsibility. Where the parents or guardians share joint custody, both must sign. The permit cannot be used until behind-the-wheel training starts with an instructor who validates it.
- Minimum age: driver license
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16
Phone laws for new drivers
- Handheld phone: banned for all drivers?
-
yes
Source: California Driver's Handbook (2025), Section 8: Safe Driving (Cell Phones and Texting), pp. 70-71.
- Texting: banned for all drivers?
-
yes
Source: California Driver's Handbook (2025), Section 8: Safe Driving (Cell Phones and Texting), p. 70.
- Hands-free also banned for minors?
-
yes
Source: California Driver's Handbook (2025), Section 8: Safe Driving (Minors and Cell Phones), p. 71.
- Phone First Offense Fine
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The statute sets a $20 base fine for a first handheld-phone offense, and $50 for a second. What you actually pay is several times that, because California adds court assessments and penalty fees on top of every base fine. Treat the $20 as the starting figure, not the bill.
Seatbelt and passenger rules
- Seatbelt law enforcement
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primary
Source: California Driver's Handbook (2025), Section 8: Safe Driving (Seat Belts), p. 65.
- Seats required to belt
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all seats
Source: California Driver's Handbook (2025), Section 8: Safe Driving (Seat Belts), p. 65.
- Child seat: age threshold
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8
- Booster seat: weight threshold
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California does not set a booster-seat requirement by weight. The transition point out of a child passenger restraint system (booster included) is age 8 or a height of 4 feet 9 inches, whichever comes first. Weight only appears earlier in the sequence, as one of the thresholds that lets a child leave a rear-facing seat: a child may face forward once they are at least 2 years old, 40 pounds, and 3 feet 4 inches tall.
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