CATASTROPHE AND MARKET
Is earthquake insurance worth it? A deductible-first way to decide
Earthquake insurance is worth it when a damaging quake would cost more than you could pay from savings, and its value turns on the deductible. California Earthquake Authority deductibles are 5 to 25 percent of the dwelling limit, so on a $500,000 limit you pay the first $25,000 to $125,000. Start with that number, then decide whether the coverage above it is what you need.
A decision framework built on California Earthquake Authority and California Department of Insurance published terms, checked October 2026, with labeled illustrations. Not a quote, not a forecast of earthquake risk, and not insurance advice. Terms outside California differ; your policy form controls. Flood is separate, including flooding after an earthquake.
Why your homeowners policy leaves this gap
The standard ISO HO-3 form excludes earth movement, which it defines to include earthquake, landslide, mudslide, subsidence and sinkholes, and any other earth sinking, rising or shifting. The exclusion has one built-in exception that matters after a quake: if direct loss by fire or explosion follows, the policy pays for that ensuing loss. The California Department of Insurance describes the same split from the consumer side: homeowners, renters and condo policies do not cover earthquake damage, fire is the main exception, and some policies cover explosion, theft or breaking glass caused by an earthquake.
So a house that burns after an earthquake is a homeowners claim. A house that cracks, shifts off its foundation or loses a chimney is an earthquake claim, and without an earthquake policy, nobody pays it. The decision this guide works through is whether to buy that second policy, and at which deductible.
The question is not only Californian. The U.S. Geological Survey's National Seismic Hazard Model, released in January 2024 as the first assessment covering all 50 states, found that nearly 75 percent of the United States could experience damaging earthquake shaking. The specific policy terms below come from California, because that is where the largest public earthquake insurer publishes its terms, but the deductible-first method works anywhere earthquake coverage is sold.
Step one: put the deductible in dollars
An earthquake deductible is a percentage of the dwelling limit, chosen when you buy. The CEA offers 5, 10, 15, 20 or 25 percent of the Coverage A and B limit, and says the CEA dwelling limit must match the dwelling limit on your homeowners policy. You cannot buy a smaller earthquake limit to cut the premium.
| Dwelling limit | 5% | 10% | 15% | 20% | 25% |
|---|---|---|---|---|---|
| $300,000 | $15,000 | $30,000 | $45,000 | $60,000 | $75,000 |
| $500,000 | $25,000 | $50,000 | $75,000 | $100,000 | $125,000 |
| $750,000 | $37,500 | $75,000 | $112,500 | $150,000 | $187,500 |
| $1,000,000 | $50,000 | $100,000 | $150,000 | $200,000 | $250,000 |
Not every option is open to every house. The CEA says the 5 and 10 percent deductibles are not available for homes with a Coverage A dwelling limit greater than $1,000,000, or for frame houses built before 1980 that are not on a slab foundation and do not have a verified retrofit. Those homes start at 15 percent. The Department of Insurance notes that state law only requires insurers to offer a 15 percent deductible; the lower options are a CEA choice.
Write the dollar figure for your own limit at each deductible you can choose. That is the amount of earthquake damage to your house you would pay before the policy pays anything for the dwelling.
Step two: compare the deductible with what you could actually pay
Earthquake insurance is catastrophe insurance. The CEA calls its homeowners policy exactly that, meant to cover the most important things you own, and the Department of Insurance says its purpose is to help put a roof back over your head, not to replace everything you lost. The decision turns on three numbers you already know.
| Number | What it tells you |
|---|---|
| A: the deductible in dollars, from step one | What you pay on any dwelling claim |
| B: savings you could spend on repairs without selling the house or defaulting | Your capacity to self-insure |
| C: your rebuilding cost, which should equal your dwelling limit | The size of the worst case |
The reading is straightforward. If B is larger than C, you could rebuild from savings and the policy is optional protection for your savings. If B is larger than A but smaller than C, the policy fills the gap you could not fill, which is the case it was built for. If B is smaller than A, even the deductible is beyond reach, and the right response is to look at a lower deductible, a retrofit discount, or both, before deciding the coverage is not worth it.
Remember the mortgage in the background. The CEA notes that you may still be paying your mortgage while living in temporary housing. A badly damaged house usually still carries its loan.
Step three: look at what sits outside the deductible
Several CEA coverages are paid without the dwelling deductible, or on their own terms, which changes the value of a policy even when the deductible is large.
| Coverage | CEA homeowners terms | Why it matters |
|---|---|---|
| Loss of use (Coverage D) | No deductible; included in the Standard policy; optional in Homeowners Choice with limits from $1,500 to $100,000 | Pays additional living costs if you cannot safely live in the house, or a civil authority bars entry because of earthquake damage |
| Emergency repairs | No deductible on the first $1,500; above that, paid once the deductible is met, up to 5% of the Coverage A and B or Coverage C limit | Boarding windows, removing broken glass, preventing rain damage through earthquake openings |
| Building code upgrade | $10,000 included; $20,000 or $30,000 available; paid once covered dwelling damage exceeds the deductible | Rebuilding after a serious quake generally has to meet current code |
| Personal property (Coverage C) | Included in Standard, payable after the Coverage A deductible is met; optional in Homeowners Choice with a separate 5 to 25% deductible waived if the dwelling deductible is met, limits of $5,000 or $25,000; $500 included for some breakables | Contents are covered, but the deductible rules decide when payment starts |
The CEA offers two homeowners policies: Standard, which buys all coverages together under one deductible, and Homeowners Choice, which allows separate deductibles for dwelling and personal property and lets you buy dwelling coverage alone. The Department of Insurance notes that the Choice policy will not apply both deductibles to the same claim: the personal property deductible is waived if covered damage to the house exceeds the dwelling deductible.
Loss of use is often the overlooked part. A family that has to leave its home for a year pays rent on top of a mortgage. Because the CEA's loss of use never has a deductible, it can pay even after a moderate quake that leaves dwelling damage below the deductible but makes the house unsafe. Our additional living expenses guide covers how those costs accumulate during a long repair.
A worked decision: three quakes, one house
What follows is a hypothetical household, built only to show how the deductible behaves; it is not a forecast, an average or a quote. A house has a dwelling limit of $500,000 under a CEA Standard policy with a 15 percent deductible ($75,000). The household has $60,000 in savings it could spend on repairs.
| Scenario (illustration) | Dwelling damage | Dwelling paid by the policy | Other CEA coverages | Household pays for the dwelling |
|---|---|---|---|---|
| Light shaking: cracked plaster, a fallen chimney | $30,000 | $0 (below the $75,000 deductible) | First $1,500 of emergency repairs with no deductible; loss of use if the house is unsafe | $30,000 |
| Strong shaking: house shifts on its foundation | $180,000 | $105,000 | Loss of use for the repair period; building code upgrade up to $10,000 because damage exceeds the deductible | $75,000 |
| Severe shaking: house a near-total loss | $500,000 | $425,000 | Loss of use; code upgrade; contents now payable because the dwelling deductible is met | $75,000 |
Check the arithmetic: $180,000 less $75,000 is $105,000; $500,000 less $75,000 is $425,000. In the light quake, the household pays $30,000 from its $60,000 of savings, and the policy contributes only the small items. In the strong and severe quakes, the household pays $75,000, which is $15,000 more than its savings, but the policy pays $105,000 or $425,000 it could never have found.
That is the honest shape of earthquake insurance. It rarely helps with small quakes and is decisive in large ones. In this illustration the deductible itself is slightly beyond the household's means, so the next question is whether a 10 percent deductible ($50,000) is available for this house and what it costs, or whether a retrofit could open that option and cut the premium.
Step four: price the retrofit before you price the policy
For many older California houses, the retrofit decision and the insurance decision belong together. The CEA offers premium discounts of up to 25 percent for older houses properly retrofitted to better withstand earthquakes. Its discount page sets the characteristics: a one-to-four unit single-family dwelling on a raised or other foundation type, with the water heater properly secured to the building frame. For houses built from 1940 to 1979, cripple walls must be braced to California Building Code standards, verified by inspection or a valid Brace + Bolt verification number, and post-and-pier or unreinforced masonry foundations must have continuous foundations under exterior bearing walls with the house anchored to them.
A verified retrofit also matters for the deductible. Pre-1980 frame houses on raised foundations without a verified retrofit are limited to 15 percent and higher; with one, the 5 and 10 percent options can open up, subject to the $1 million limit rule.
The Earthquake Brace + Bolt program, created by the California Residential Mitigation Program, offers grants of up to $3,000 toward a code-compliant retrofit of a qualifying house, and supplemental grants for income-eligible households that may pay up to 100 percent of the cost as funds allow. The program says a typical retrofit by a licensed contractor may cost $3,000 to $7,000, depending on the house, and that registration opens for a limited time each year.
Houses on a slab foundation are already treated as more resistant, and the CEA says their premium already reflects that, so the retrofit discount does not apply to them.
What earthquake insurance does not cover
The Department of Insurance lists common exclusions in earthquake policies, and the CEA's homeowners policy has its own.
- Fire. Earthquake insurance usually does not cover what the homeowners policy already covers. Fire after a quake is a homeowners claim.
- Land. Damage to the land itself is usually not covered, though limited coverage to restore or stabilize land may be available.
- Vehicles. Check the auto policy.
- Flood and outside water. Sewer or drain backup, flood and tsunami are not covered; a flood policy is needed for flooding after a quake. See why flood insurance is separate.
- Site features. The department says CEA insurance, like most earthquake policies, does not cover landscaping, pools, fences, masonry or separate buildings.
How to buy it, and when
In California, the CEA sells through the residential insurers that participate with it, and the Department of Insurance says you must buy the CEA policy from the same company that writes your residential policy. The CEA says you can add coverage at any time, without waiting for renewal. The department adds that your homeowners insurer must offer earthquake coverage in writing every other year, showing the limits, deductible and premium, and that you have 30 days from the mailing date to accept; silence counts as rejecting the offer.
A few insurers sell earthquake policies that are not CEA policies and can be bought without buying homeowners insurance from the same company, according to the department. Outside California, earthquake coverage is offered on terms set by each insurer and state, so ask for the deductible as a percentage and in dollars, the coverage parts included, and how loss of use and code upgrades are handled.
The CEA says its premiums depend on the home's age, foundation type, construction type, roof type, and location risk such as proximity to a fault and soil type. It offers a premium calculator for estimates; a figure from it is an estimate, not a quote from your insurer.
Condo owners and renters
The decision looks different if you do not own the whole building. An association's own policy may leave out earthquake damage to the exterior and common areas, the department warns, and for that reason the CEA's unit owner policy includes assessment coverage, which the department puts at as much as $100,000 for an owner's share of certain earthquake assessments. Renters can insure belongings and living costs. Our condo loss assessment guide shows how to estimate a share of an association's deductible.
A short checklist before you decide
- Write your dwelling limit and the deductible in dollars at each available percentage.
- Write the savings you could spend on repairs without selling the house.
- Check whether your house is eligible for the 5 and 10 percent deductibles, and if not, whether a verified retrofit would change that.
- Ask for quotes at two deductible levels, with the same coverages, so the price difference is clear.
- Check the loss of use limit and the building code upgrade option.
- If you are a condo owner, ask the association what its master policy covers for earthquake.
- Put the decision on your calendar to revisit at the next written offer, two years out.
The deductible arithmetic is the same logic our percentage deductible guide applies to wind and hurricane deductibles, and the deductible trade-off calculator can help compare the premium saved by a higher deductible against the extra you would pay on a claim.
Ground movement that is not an earthquake, such as settling or a sinkhole, is excluded from the standard form on different grounds; the foundation guide shows the clauses.
Questions homeowners ask about earthquake insurance
Does homeowners insurance cover earthquake damage?
No, apart from narrow exceptions. The standard ISO HO-3 form excludes earth movement, including earthquake, but pays for direct loss by fire or explosion that follows. The California Department of Insurance says homeowners, renters and condo policies do not cover earthquake damage, with fire as the main exception, and that some policies cover explosion, theft or breaking glass caused by an earthquake.
How does an earthquake deductible work?
It is a percentage of the dwelling limit, not of the loss. The California Earthquake Authority offers 5, 10, 15, 20 or 25 percent of the Coverage A and B limit. On a $500,000 dwelling limit, a 15 percent deductible is $75,000, so the policy pays only for dwelling damage above that amount. Homes with a dwelling limit over $1 million, and older raised-foundation homes without a verified retrofit, can choose only 15, 20 or 25 percent.
Is earthquake insurance worth it if the deductible is so high?
It depends on whether you could rebuild or keep paying a mortgage on a badly damaged house without it. The policy is catastrophe protection: it pays little on a cracked chimney and a great deal when a house is badly damaged or destroyed. If your savings could absorb the deductible but not the full rebuild, the coverage does the job it was designed for. If the deductible alone is beyond your means, consider a lower deductible or a retrofit discount.
Do I have to buy earthquake insurance if I have a mortgage?
Not in California. The Department of Insurance says that if you have a mortgage you must have homeowners insurance, but you do not have to buy earthquake insurance. Lenders can set their own requirements, so check your loan documents.
How do I get a discount on earthquake insurance?
In California, the CEA offers premium discounts of up to 25 percent for qualifying older houses that have been seismically retrofitted. To qualify, a house generally needs to be a one-to-four unit dwelling on a raised or other foundation type, with the water heater secured to the frame and, for houses built before 1980, braced cripple walls and a foundation anchored to the structure, verified by an inspection professional. Earthquake Brace + Bolt grants of up to $3,000 can help pay for the retrofit.
Can I add earthquake coverage at any time?
In California, the CEA says you can add coverage through your residential insurer at any time, without waiting for your homeowners renewal. Insurers must also offer earthquake coverage in writing every other year, and you have 30 days from the mailing date to accept; if you do not reply, you have rejected the offer.
Sources and verification
Deductibles of 5% to 25%, restrictions for dwelling limits over $1,000,000 and pre-1980 non-slab frame homes without a verified retrofit, CEA limit matching the homeowners Coverage A, Standard and Homeowners Choice structures, personal property, loss of use limits and no deductible, emergency repairs ($1,500 with no deductible, up to 5% above that), building code upgrade ($10,000, $20,000 or $30,000), $500 breakables: California Earthquake Authority, Coverages and deductibles; catastrophe insurance, buy through your residential insurer, add at any time, premium factors, mortgage while displaced, retrofit discount up to 25%: CEA, Homeowners earthquake insurance policies; discount eligibility criteria: CEA, Premium discounts; all checked October 22, 2026. Homeowners policies exclude earthquake except fire, explosion, theft or glass exceptions, no mortgage requirement for earthquake, written offer every other year and 30 days to accept, state law requires a 15% deductible option, deductible waiver in Choice, site-feature and common exclusions, condo assessment coverage up to $100,000, non-CEA policies: California Department of Insurance, Earthquake insurance, checked October 22, 2026. Earth movement exclusion and ensuing fire or explosion: Insurance Services Office HO 00 03 10 00 sample form published by the Insurance Information Institute, HO-3 sample policy, read October 22, 2026. Nearly 75% of the U.S. could experience damaging shaking, first 50-state model: U.S. Geological Survey, news release (January 2024), checked October 22, 2026. Grants up to $3,000, supplemental grants up to 100% for income-eligible households, typical $3,000 to $7,000 retrofit cost, limited registration: Earthquake Brace + Bolt, checked October 22, 2026. The deductible table and three-quake example are labeled illustrations. See Methodology and the Disclaimer.
If you live in California, find your insurer's last written earthquake offer, or ask for a new one, and write its deductible in dollars beside your savings figure; that one comparison settles most of this decision. Other catastrophe coverage decisions, from flood to residual markets, are on the catastrophe and market hub, and the California cost page shows the state's published homeowners average.