California is a tort (at-fault) auto state with no mandatory No-Fault/PIP, an elected Insurance Commissioner, and rates governed by Proposition 103. Those three facts color almost every California auto question, so this standalone guide covers the national fundamentals of the personal auto contract and then makes California law the spine. Give the California rules real study time—the state leans heavily on its own statutes.

How the personal auto contract works (the national base)

Before the California layer, know the structure of the standard Personal Auto Policy (PAP), which California insurers use as the building block. It splits coverage into lettered parts:

• Part A — Liability for bodily injury (BI) and property damage (PD) you are legally responsible for, including a duty to defend with defense costs paid on top of the limit.
• Part B — Medical Payments for the insured and passengers regardless of fault.
• Part C — Uninsured/Underinsured Motorists (UM/UIM) when the at-fault driver has no or too little insurance.
• Part D — Coverage for Damage to Your Auto (Collision and Other Than Collision/Comprehensive), paid at Actual Cash Value (ACV).
• Parts E and F are duties after a loss and general provisions.

Liability limits are written as split limits (e.g., 100/300/50 = per-person BI / per-accident BI / per-accident PD) or as a combined single limit (CSL).

California is a tort state

California uses the tort/at-fault system: the driver who causes a crash (and their insurer) is responsible for the other party's damages. There is no mandatory Personal Injury Protection (PIP) and no No-Fault scheme—a key contrast with Florida and New York. Medical Payments coverage exists but is optional, and recovery for injuries generally runs through the at-fault party's liability coverage or your own UM/UIM.

Financial responsibility minimums

California enforces financial responsibility through the Vehicle Code. Drivers must show ability to pay for damage they cause, almost always by buying minimum liability insurance.

• The long-standing minimum was 15/30/5 — $15,000 BI per person / $30,000 BI per accident / $5,000 PD. Memorize 15/30/5 as the historical/baseline figure the exam often references.
• These minimums were raised by legislation (SB 1107) to 30/60/15 for policies issued or renewed on or after January 1, 2025, with a further scheduled increase to 50/100/25 in 2035. If a question is dated 2025 or later, the current minimum is 30/60/15.
• Proof of financial responsibility can also be met (less commonly) by a cash deposit or surety bond with the DMV.

Because the figure changed recently, read each question's date: older material says 15/30/5; current law says 30/60/15.

The Good Driver Discount (a signature California rule)

Proposition 103 created a mandated Good Driver Discount Policy. An insurer must offer it, and it must be priced at least 20% below the rate the same driver would otherwise pay. To qualify as a Good Driver, a person generally must have:

• Been licensed for the past 3 years,
• No more than one point on their motor vehicle record (for minor violations) and no qualifying at-fault serious incidents, and
• No felony/at-fault fatality driving conviction in the look-back period.

Prop 103 also requires that auto rates be based primarily on the mandatory rating factors—the insured's driving safety record, annual miles driven, and years of driving experience—with other factors given less weight.

Required offers: UM/UIM

California insurers must offer Uninsured/Underinsured Motorist coverage. Key rules:

• UM/UIM must be offered, but the applicant may reject or reduce it; the rejection generally must be in writing.
• UM covers BI caused by an uninsured or hit-and-run driver; UIM (in California, "underinsured motorist") applies when the at-fault driver's limits are lower than yours and insufficient.
• Uninsured Motorist Property Damage (UMPD) is available, typically with a small deductible, but is more limited than the BI portion.

Programs for hard-to-insure and low-income drivers

• California Automobile Assigned Risk Plan (CAARP) — the residual market that places drivers who can't get coverage in the voluntary market.
• California Low Cost Automobile (CLCA) program — state program offering reduced-premium liability policies to income-eligible drivers with good records, so they can meet financial responsibility affordably. Limits under CLCA are below the standard minimums by design.

Proposition 103 effects on auto

Under Proposition 103, most auto rates require prior approval by the Commissioner before use and may not be excessive, inadequate, or unfairly discriminatory. Prop 103 also:

• Mandated the 20% Good Driver Discount described above.
• Established the mandatory rating factors (driving record, miles driven, experience first).
• Created an intervenor process letting consumer advocates challenge proposed rates.
• Generally prohibits using a person's lack of prior insurance as a sole reason to raise rates or deny the Good Driver Discount.

Cancellation and nonrenewal

California limits when an auto insurer can drop a policy, especially once it has been in force.

• After a policy has been in effect a set period (commonly 60 days), the insurer may cancel mid-term only for specific reasons—chiefly nonpayment of premium, fraud/material misrepresentation, or a substantial increase in hazard (such as a license suspension/revocation of the named insured or a regular driver).
• Cancellation notice is short: typically about 10 days for nonpayment and a longer period (often around 20 days) for other allowed reasons. Treat the exact day count as the standard CDI figure and confirm against current law.
• Nonrenewal (declining to continue at the end of the term) requires advance written notice—commonly around 30 days before expiration for auto—and the insurer must state the reason on request.

Key California numbers to memorize

Common exam traps

• Calling California No-Fault/PIP. It is a tort/at-fault state with no mandatory PIP.
• Using the wrong minimums. Older items say 15/30/5; for 2025+ the answer is 30/60/15.
• Forgetting the 20% Good Driver Discount and its 3-year licensing / ≤1 point eligibility.
• Thinking UM/UIM is automatic. It must be offered, but can be rejected in writing.
• Ignoring Prop 103. Rates need prior approval, and the mandatory rating factors come first.
• Assuming an insurer can cancel anytime. After ~60 days, mid-term cancellation is limited to nonpayment, fraud, or increased hazard.
• Confusing CLCA with standard limits. Low Cost Auto limits are below the normal minimums.

Quick recap

California runs a tort/at-fault auto system with no PIP. Financial responsibility historically required 15/30/5, now 30/60/15 for policies issued or renewed in 2025 or later (heading to 50/100/25 in 2035). Proposition 103 drives the market: prior-approval rates, the mandatory rating factors (record, miles, experience), and a mandated Good Driver Discount of at least 20% for drivers licensed 3 years with ≤1 point. Insurers must offer UM/UIM (rejection in writing), the CLCA program helps income-eligible drivers, and CAARP is the residual market. Once a policy has been in force about 60 days, mid-term cancellation is limited to nonpayment, fraud, or increased hazard, with short cancellation notices and roughly 30-day nonrenewal notice. Master the tort system, the changing minimums, the Good Driver Discount, and Prop 103, and the California auto questions become routine.