Does homeowners insurance cover earthquake damage?

No. A standard homeowners policy does not cover earthquake damage. The standard policy forms sold in the US, including the HO-3 that most homeowners carry, exclude earth movement, so shaking that cracks a foundation, drops a chimney, or racks the framing of your house is not a covered loss. To be protected you have to buy earthquake coverage separately, either as an endorsement added to your existing policy or as a standalone earthquake policy. There is one important exception that catches people by surprise in both directions: fire that breaks out after a quake is generally covered by your standard policy even if you never bought earthquake coverage.

Why earthquake damage is excluded in the first place

Because earthquakes are a catastrophe risk that does not spread across an insurer's book the way ordinary claims do. Standard homeowners premiums are built around losses that arrive one house at a time, like a kitchen fire here and a burst pipe there. A single large quake can damage tens of thousands of homes in the same minute, in the same handful of ZIP codes, which is the opposite of how insurance math works. So earth movement gets carved out of the base policy and priced as its own product.

The exclusion is also broader than the word earthquake suggests. Standard forms typically exclude earthquake along with landslide, mudflow, and earth that sinks, rises, or shifts, whether or not a quake set it off. That breadth matters after a seismic event, because a slope that gives way days later can fall under the same exclusion as the shaking itself. Exact wording varies by form and by insurer, so your own policy is the controlling document.

How you actually buy earthquake coverage

There are two routes, and which one is available depends on your insurer and your state. The Insurance Information Institute describes earthquake coverage as available either as a separate policy or as an endorsement from most private insurers, and in California through the California Earthquake Authority.

Some states put rules around the offer. California requires residential insurers to offer earthquake coverage in writing every other year, and homeowners get 30 days from the mailing date to accept. Timing matters more than most people realize. Oregon's Division of Financial Regulation notes that most insurers place a moratorium on selling earthquake coverage for a period of time after any significant seismic event, so the window to buy tends to close exactly when everyone starts thinking about it. This is coverage you put in place on a quiet day.

The percentage deductible is the part that surprises people

Earthquake deductibles are generally not flat dollar amounts. They are typically a percentage of your coverage limit, and the percentage applies to that limit, not to the size of your loss.

That single difference changes the economics of a claim. The National Association of Insurance Commissioners puts the typical earthquake deductible at 10 to 20 percent of the coverage limit and gives a plain example: a home insured for $200,000 with a 10 percent deductible carries a $20,000 deductible. The Insurance Information Institute describes the usual range as 5 to 15 percent of the policy limit. Oregon's insurance regulator says most insurers there sell coverage with 10 or 15 percent deductibles and runs the same math, noting that a homeowner with $300,000 in dwelling coverage and a 10 percent deductible would pay $30,000 before insurance pays.

Compare that with the flat deductible on a typical homeowners policy and the practical consequence is clear. Moderate earthquake damage, like cracked drywall, a damaged chimney, and some broken plumbing, can land entirely below the deductible, meaning you absorb it yourself even though you are insured. Earthquake coverage is designed to save you from a catastrophic loss, not to reimburse ordinary repairs. The NAIC also points out that a policy may apply separate deductibles to different pieces of property, so your home, your belongings, and outside structures like detached garages and fences may each carry their own.

The California Earthquake Authority is its own mechanism

California handles this differently from the rest of the country. According to the CEA's own account of its history, the California Legislature created the CEA in 1996 after the 1994 Northridge earthquake, which the California Seismic Safety Commission estimated caused about $20 billion in residential damage, only about half of it insured. The Insurance Information Institute puts total insured losses from Northridge at $15.3 billion, making it the costliest earthquake in US history. The quake left insurers unwilling to keep writing home policies in the state. The CEA describes itself as a not-for-profit, publicly managed, privately funded entity, and both the CEA and the Insurance Information Institute state that it provides about two-thirds of the residential earthquake insurance policies sold in California.

You cannot buy from the CEA directly. Policies are sold only through participating residential insurers, which means your home has to already be insured by a participating company for you to be eligible. The CEA homeowners policy is also structured in pieces rather than as one limit:

• Dwelling coverage, which follows your homeowners dwelling limit and carries the deductible you select.
• Personal property coverage, available in limits of $5,000 or $25,000. Under the standard homeowners plan it falls under the dwelling deductible; under the Homeowners Choice plan you can select a separate deductible for it.
• Loss of use coverage, available in limits from $1,500 up to $100,000, with no deductible ever applied, for additional living expenses when earthquake damage or a civil authority keeps you out of your home.
• Building code upgrade coverage, with $10,000 included and $20,000 and $30,000 available as options, paid after the dwelling deductible is met.
• Emergency repairs to protect the home or personal property from further damage, up to 5 percent of the limit for the type of property being protected, with the first $1,500 not subject to any deductible.

Deductible choices run from 5 percent to 25 percent of the dwelling coverage amount, in 5 percent increments. Two groups get fewer choices: homes with a dwelling limit greater than $1,000,000, and dwellings built before 1980 on a raised or other type of foundation that do not have a verified retrofit, are eligible only for a 15, 20, or 25 percent deductible. That retrofit condition is worth noting, because bolting an older house to its foundation and bracing a cripple wall can change which deductibles you are allowed to choose, not just what you pay.

What earthquake coverage does not pay for

Earthquake policies are narrower than homeowners policies, and the gaps are common enough across insurers to be worth knowing in advance. The California Department of Insurance states that, as with most earthquake policies, CEA insurance does not cover landscaping, pools, fences, masonry, or separate buildings, and similar categories tend to be excluded or sharply limited elsewhere. Terms still vary by insurer and state, so check your own form.

• The land itself. Regrading a slope, rebuilding a retaining wall, or repairing soil that shifted is generally not covered.
• Exterior features. Pools, fences, driveways, and landscaping are commonly excluded or require a separate endorsement.
• Detached structures. A standalone garage or shed is often not included the way it would be under a homeowners policy, and where it is covered it may carry its own deductible.
• Vehicles. A car crushed in your garage is a comprehensive auto claim, not a homeowners or earthquake claim.
• Water from outside the home. Flood and tsunami damage are excluded from earthquake coverage and sit with a separate flood policy.
• Certain related earth movement. Oregon's regulator states that earthquake insurance does not cover a loss caused by landslides, erosion, tsunami, or volcanic eruption, even if an earthquake causes them to happen.

One more mechanical detail worth understanding: most earthquake policies treat all shocks within a 72-hour period as a single earthquake. Both the NAIC and Oregon's Division of Financial Regulation describe this convention. In practice it means an initial quake and its immediate aftershocks generally produce one claim and one set of deductibles rather than several, while a shock outside that window can trigger a second deductible.

Fire after an earthquake is the big exception

Fire following a quake is usually covered by your standard homeowners policy, even without earthquake coverage. The Insurance Information Institute states that homeowners and renters policies will generally cover losses from fire following a quake and, if such a fire makes your home unlivable, the additional living expenses incurred while you live elsewhere during repairs. California goes further and requires it: the state's Department of Insurance says state law mandates that both homeowners and renters insurance must cover fire damage that is caused by or follows an earthquake, whether or not the policyholder bought earthquake coverage.

Do not read more into that than it says. The fire is covered; the shaking damage is not. If a quake cracks your foundation and no fire starts, you are on your own without earthquake coverage. The exception also does not extend to flood or tsunami damage after a quake, which needs a separate flood policy.

Who should seriously consider it

Earthquake risk is far more widespread than the California stereotype suggests. In January 2024 the US Geological Survey released its 2023 50-State update to the national seismic hazard model, finding that nearly 75 percent of the US could experience damaging earthquake shaking, and noting that 37 US states have experienced earthquakes exceeding magnitude 5 during the last 200 years. That model remains the current one for the 50 states. Its reach includes regions with no seismic reputation at all, such as the New Madrid zone in the central Mississippi Valley, the area around Charleston in South Carolina, stretches of the Intermountain West, and the central and northeastern Atlantic coastal corridor from Washington, DC through Boston.

Coverage makes the most sense when the deductible is meaningfully smaller than what you stand to lose and you could not simply write a check to rebuild. A few things to weigh:

• Your equity and savings. If a total loss would wipe you out while you still owe on the mortgage, a percentage deductible looks small next to the alternative.
• Your building type. Unreinforced masonry, homes on raised foundations without a retrofit, and soft-story buildings tend to take shaking badly; wood-frame homes bolted to their foundations tend to do better.
• Your soil and proximity to a known fault, both of which drive risk and price.
• Whether you can absorb the deductible in cash. A 15 percent deductible on a $400,000 dwelling limit is $60,000, and if that number is out of reach, a lower deductible tier is worth pricing if you qualify for one.
• Retrofit opportunities. Foundation bolting and cripple-wall bracing reduce damage, may earn a premium discount, and in California can open up lower deductible options.

The bottom line

Earthquake damage is excluded from standard homeowners policy forms, and no amount of dwelling coverage changes that. Protection comes from an endorsement or a separate policy, priced with a percentage deductible that is far larger than what you are used to and that applies to your coverage limit rather than to your loss. Fire following a quake is the one meaningful piece your existing policy already handles. Because deductible tiers, sublimits, and exclusions vary so much between insurers and states, the only reliable way to know where you stand is to read your own declarations page, ask your insurer what an earthquake endorsement would cost at each deductible level, and check with your state insurance department about what carriers in your area are required to offer.