Earthquake Insurance in California: CEA vs Private Policies, Deductibles, and Whether It Is Worth It

Earthquake insurance in California is a separate policy that pays to repair or rebuild your home after shake damage, which a standard homeowners policy does not cover. State law requires your home insurer to offer it to you, in writing, at least every other year, but you are never required to buy it.^[1][2] Most of the policies sold in the state come from the California Earthquake Authority (CEA), a not-for-profit entity that writes coverage exclusively through participating home insurers; the rest come from private insurers that write their own earthquake forms.^[7][4]

The decision that matters most is the deductible, not the premium. A CEA policy lets you choose a deductible of 5%, 10%, 15%, 20% or 25% of your dwelling limit, and that percentage is the share of a major loss you agree to carry yourself before the policy pays anything.^[5] Pick that number first, then use CEA's premium calculator to see what the coverage costs, and only then decide whether the policy is worth it for your house. If you want a broker to run that comparison across CEA and non-CEA markets, start a residential earthquake quote and we will show you the options side by side.

Does my homeowners policy cover earthquakes?

No. A California homeowners policy does not pay for damage caused by the shaking itself, which is why earthquake coverage is written as a separate policy or endorsement. State law does require your homeowners policy to cover fire that follows an earthquake, so a house that burns after a quake is a homeowners claim, while a house that cracks off its foundation is an earthquake claim.^[4] The distinction matters because the two policies have very different deductibles: a homeowners deductible is usually a flat dollar amount, while an earthquake deductible is a percentage of the dwelling limit.

Earthquake insurance is also optional in a way most property coverage is not. Mortgage lenders require fire insurance on the collateral, but the Department of Insurance's guide notes that earthquake insurance is optional even when you have a mortgage.^[4] The decision falls entirely on the owner.

What does California law require insurers to offer?

The offer rule sits in Insurance Code section 10081 and the sections that follow it. Any insurer that issues, delivers or initially renews a residential property policy in California must offer earthquake coverage. The insurer may make that offer as a provision or endorsement on your homeowners policy or as a separate policy, and the law is satisfied by the offer, not by your acceptance.^[1]

Section 10083 sets the mechanics. The offer can be made before, with, or within 60 days after the policy is issued or renewed. It must appear in at least 10-point boldface type and tell you that if you do not accept within 30 days of the mailing date the insurer will presume you declined. Once you decline, the insurer "shall be required on an every other year basis to offer earthquake coverage" again.^[2] The Department of Insurance's consumer guide puts it plainly: the insurer must offer you the coverage in writing every two years and you have 30 days from the mailing date to respond; no response counts as a decline.^[4]

Section 10089 fixes the minimum shape of the offer. It must include coverage for the dwelling, contents coverage of at least $5,000, additional living expenses of at least $1,500, and a deductible no greater than 15% of the dwelling limit. Outbuildings, pools, patios and similar items may be excluded, and a masonry chimney may be excluded only if the policy pays to replace it with a non-masonry, earthquake-resistant chimney.^[3] The insurer can offer other policies too, as long as one option meets these minimums.

CEA vs private earthquake insurance: what is the difference?

The California Earthquake Authority was created in the aftermath of Northridge. The January 17, 1994 earthquake caused an estimated $20 billion in residential damage, only about half of it insured, and insurers had, in CEA's words, "greatly underestimated" the cost of even a moderate earthquake.^[7] The Legislature's answer in 1996 was a publicly managed, privately funded, not-for-profit authority. Residential insurers could either keep writing their own earthquake coverage or join CEA as participating insurers and sell CEA's policy instead of writing their own.^[7]

That history explains the market you face today. If your homeowners insurer is a CEA participating insurer, the earthquake offer you receive is a CEA policy, and you buy, renew, pay and claim through that insurer.^[9] If your insurer is not a participant, it offers its own earthquake coverage under the same mandatory-offer law. The Department of Insurance also notes that some companies sell stand-alone earthquake policies, sometimes called monoline policies, that you can buy separately from your homeowners insurer.^[4]

Neither column is automatically better. CEA is the default because it is what most insurers sell, and its financial structure is transparent. A private policy can make sense when your insurer is not a CEA participant, when you want features the CEA form does not offer, or when the price is simply lower for your house. A broker can quote both; CEA's own calculator only prices CEA.

How do earthquake insurance deductibles work?

An earthquake deductible is a percentage of your dwelling coverage limit, not a percentage of the loss. CEA offers 5%, 10%, 15%, 20% and 25%.^[5] If your home is insured for more than $1,000,000, or it was built before 1980 on a raised foundation or another foundation type and has not had a verified retrofit, only the 15%, 20% and 25% options are available.^[5] State law only requires that insurers offer a 15% option, so the 5% and 10% choices are a CEA feature, not a legal right.^[4]

An illustrative example, with round numbers chosen for arithmetic rather than taken from any rate filing: a home with a $600,000 dwelling limit and a 10% deductible carries a $60,000 deductible. A $40,000 foundation repair after a moderate quake would fall entirely inside the deductible and the policy would pay nothing on the dwelling. A $300,000 loss would pay $240,000. Move the deductible to 5% and the same $40,000 repair pays $10,000, at a higher premium; move it to 25% and the policy only responds once dwelling damage exceeds $150,000. That is the whole trade: a lower deductible costs more every year and pays out on smaller quakes, a higher deductible costs less and only protects you from the catastrophe.

Two parts of a CEA policy sit outside the deductible. Loss of use, the coverage that pays for a place to live while your home is repaired, "never has a deductible", and emergency repairs to protect the home from further damage carry no deductible for the first $1,500.^[5] The CEA Homeowners Choice policy also lets you carry separate deductibles for the dwelling and for personal property, so a contents claim is not swallowed by the dwelling deductible.^[4]

What does a CEA earthquake policy cover?

A CEA homeowners policy is built from a few standard parts. The Department of Insurance's guide describes the basic policy this way:^[4]

• Dwelling: the limit matches the dwelling limit on your homeowners policy. Building code upgrade coverage of $10,000 is included, with higher limits available.^[5]
• Personal property: from $5,000 to $25,000 on the basic policy, with higher limits available on the Homeowners Choice policy.^[4]
• Loss of use: additional living expenses from $1,500 up to $100,000, with no deductible.^[4]
• Emergency repairs: the first $1,500 is paid without a deductible.^[5]

Like other earthquake forms, the policy excludes land, vehicles and water damage originating outside the home, and the Department warns that claims may be denied if the damage is not reported within one year.^[4] Earthquake damage is often hidden in foundations and framing, so a post-quake inspection inside that window is worth arranging even if the house looks fine.

The code upgrade piece deserves a note. When a damaged home is rebuilt, current building codes may require work the old structure never had, and a plain dwelling limit does not pay for it. Our guide to ordinance or law coverage explains the mechanism; on a CEA policy it is the building code upgrade limit that does that job.

How much does earthquake insurance cost in California?

There is no single answer, and any article that gives you one number is guessing. CEA rates the same house very differently depending on how old it is, what kind of foundation it sits on, how it is built, what the roof is made of, and where it is, including distance to known faults and soil type.^[5] Your chosen deductible and coverage limits then scale the premium up or down.

The honest way to answer the question for your own home is CEA's Earthquake Insurance Premium Calculator, which estimates the cost of a CEA policy for homeowners, condo owners, mobilehome owners and renters from your address and coverage choices.^[6] Run it twice, once at 10% and once at 20%, and the gap between those two numbers tells you what a lower deductible actually costs you per year. Remember that the calculator only prices CEA; to purchase, you go back through your residential insurer.^[6]

What discounts and grants are available for retrofits?

Older wood-frame houses on raised foundations are the classic earthquake casualty: the house slides off its foundation or the short "cripple wall" between the foundation and the first floor collapses. A brace-and-bolt retrofit bolts the frame to the foundation and braces those cripple walls with plywood.^[10] CEA rewards that work in two ways. A verified retrofit unlocks the lower 5% and 10% deductible options on pre-1980 homes, and it qualifies the home for premium discounts of up to 25%.^[5]

The state also helps pay for the work. The Earthquake Brace + Bolt (EBB) program, run by the California Residential Mitigation Program and funded by CEA's Loss Mitigation Fund together with FEMA hazard-mitigation grants, pays up to $3,000 toward a code-compliant retrofit. Households with income at or below $94,480 may qualify for a supplemental grant of up to $7,000, which can cover the full cost of the retrofit.^[10] To qualify, the house must be wood-frame, built before 1980, on a raised foundation, and in one of the program's high-hazard ZIP codes, of which there were more than 1,100 as of January 2025. Registration opens for a limited time each year, and the program reports that a typical contractor retrofit costs between $3,000 and $7,000.^[10]

Is earthquake insurance worth it in California?

Nobody can answer that for you with a statistic, so here is the framework we walk clients through. It has no prices in it on purpose; you supply those from the calculator or a quote.

1. Start with your equity, not your house value

   The policy protects the money you would lose if the house were destroyed and you still owed the mortgage. An owner with a small down payment and a large loan has a different exposure from one who owns the house outright. Ask what a total loss would do to your balance sheet, and whether you could walk away or would be forced to rebuild.

2. Write down the deductible in dollars

   Multiply your dwelling limit by each deductible option you are considering. That dollar figure is damage you will pay for yourself. If the deductible is larger than any repair you can imagine short of a rebuild, the policy is catastrophe cover, which is fine, but price it as such.

3. Check the house, not the headline

   CEA prices age, foundation type, construction, roof and location for a reason: those are what decide whether a given quake cracks a slab or shears a house off its footings.^[5] A pre-1980 raised-foundation home without a retrofit is in a different risk class from a newer slab home, and the deductible menu tells you so.

4. Compare the premium with the retrofit

   For an eligible older home, put the EBB grant and a retrofit quote next to the premium at your chosen deductible. Sometimes the retrofit alone buys more safety per dollar; usually the retrofit plus a discounted policy is the combination that makes sense.^[10]

5. Decide how you would feel the morning after

   The Department of Insurance's guide reminds owners that the coverage is optional even with a mortgage.^[4] If you would rebuild no matter what, the policy replaces savings you would otherwise spend. If you would sell the lot and move on, the question is what the lender would still be owed.

Run the numbers, then decide. If you want them run for both CEA and non-CEA markets, request an earthquake insurance quote and our brokers will price the options for your address. Condo owners have their own issues around HOA master policies and loss assessment; see condo and HOA earthquake insurance for that side, and earthquake insurance for the overview.

This guide is for educational purposes and summarizes California statutes, Department of Insurance consumer guides and CEA public materials. Your policy's specific terms, conditions, and endorsements control. Menlo Insurance Services (CA license 6020106) does not guarantee that any coverage or price will be available; talk to a licensed broker about your actual exposures.

The Bottom Line

California makes your insurer offer earthquake coverage and leaves the choice to you. The policy is worth what it protects: your equity above a deductible you chose in advance. Convert the deductible to dollars, retrofit the house if it qualifies, price the policy with the calculator or a broker, and buy it if a total loss would break you. Decline it with a clear head if it would not.