How to think about auto insurance in California: what to buy and why
Updated May 21, 2026 — PolicyChat refreshes this page when new state DOI filings post.
For most California drivers, $300K/$300K liability is the right starting point. The math: most carriers price the jump from $100K/$300K to $300K/$300K at $8-18 a month, and the protection difference is real. A serious bodily-injury claim crosses $100K fast.
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How PolicyChat sources this data
PolicyChat Rate Authority aggregates three public + licensed sources, with per-record provenance. Every rate cited on this page links to its source filing.
- State DOI / SERFF filings — public rate filings, refreshed daily.
- NAIC published averages — annual state aggregates (currently 2023, latest released).
- Licensed partner feeds (EverQuote, LendingTree) — real-time per-profile quotes when a user walks through Sage.
Methodology: /methodology/rate-authority/
How to think about this
California is a prior-approval state under Proposition 103 (1988), which means every rate change above 7% requires a public hearing before the Department of Insurance and can be challenged by consumer groups.
The threshold to think harder is $500K in assets. Past that point, $300K/$300K plus a $1M umbrella is the standard package; the umbrella runs $150-300 a year and requires you to first carry $250K/$500K underlying. Below $500K in assets, $300K/$300K alone is plenty.
California-specific things to know
- Prop 103 prior-approval system requires public hearings for rate increases above 7%.
- Most major carriers paused new homeowners business in fire-prone ZIPs between 2022-2024; CDI’s Sustainable Insurance Strategy (2024) reopened parts of the market.
- Credit-based insurance scoring is prohibited for auto policies under California law.
When the recommendation changes
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Below $50K in assets: minimum required limits are fine.
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$500K-$2M in assets: $300K/$300K + $1M umbrella.
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Above $2M in assets: talk to a high-net-worth broker about $2M-$5M umbrella.
California auto carrier baselines (reference)
| Carrier | Filed Rate | Effective | Source |
|---|---|---|---|
| Mercury | $143/mo | 2026-01-15 | State DOI |
| Geico | $157/mo | 2025-11-01 | State DOI |
| Progressive | $172/mo | 2025-12-01 | State DOI |
| State Farm | $190/mo | 2026-01-01 | State DOI |
| Allstate | $202/mo | 2025-12-15 | State DOI |
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