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Why earthquake insurance is a separate purchase
Every standard homeowners policy in the United States excludes earthquake damage. Fire following an earthquake is usually covered, but shaking damage to the structure, cracked foundations, and toppled chimneys are not. The only way to cover them is a standalone earthquake policy or an earthquake endorsement, and the cost varies enormously by where you live.
The price differences are not subtle. In states with little seismic activity, earthquake coverage can cost $100 to $300 a year. In California, Alaska, Oregon, and Washington, the same coverage often runs $800 to $2,000 or more annually, with higher-risk areas pushing past $3,000. Location is the dominant rating factor by a wide margin.
Cost by region
California. The most expensive market and the one with the most options. The California Earthquake Authority (CEA), a state-managed nonprofit, writes the majority of residential earthquake policies in the state. A typical CEA policy runs roughly $800 to $2,000 a year depending on location, home age, construction type, and coverage level, though premiums in the highest-risk zones can go higher. Wood-frame homes fare better than masonry. Retrofitted homes with foundation bolting and cripple-wall bracing can earn premium discounts of 5 to 20 percent. Deductibles are percentage-based, commonly 15 percent of the dwelling coverage, which means a $500,000 home carries a $75,000 deductible before the policy pays.
Pacific Northwest (Oregon and Washington). Both states sit on active fault systems, including the Cascadia subduction zone, and both have meaningful earthquake risk that many homeowners underestimate. Premiums in the Northwest generally run a few hundred to around $1,000-plus a year, with costs rising near the coast and in the Seattle and Portland metro areas. Coverage is available as standalone policies or endorsements from many of the same carriers that write homeowners insurance, and some regional insurers specialize in it.
Alaska. The most seismically active state in the country. Earthquake insurance for a typical home can exceed $1,200 a year, and coverage is harder to find, with fewer carriers writing it. Homeowners in Anchorage and other population centers should expect some of the highest earthquake premiums in the nation.
Central and Eastern US (New Madrid zone, Charleston, parts of the Midwest and East Coast). Earthquake risk exists here too, from the New Madrid fault zone affecting Missouri, Tennessee, Arkansas, and Kentucky, to the Charleston area in South Carolina. Because major quakes are less frequent, coverage is cheap, often $100 to $300 a year as an endorsement. Uptake is low, which means a damaging quake in these regions would leave most homeowners paying out of pocket.
Low-risk states. In states like Florida and much of the Midwest, earthquake endorsements can cost well under $200 a year. At that price, the decision is less about cost and more about whether the risk justifies any premium at all.
What the policy actually covers
Earthquake policies cover the dwelling against shaking damage, but the coverage is narrower than a homeowners policy. Personal property coverage is often limited, sometimes to a small default amount with the option to buy more. Loss of use coverage, which pays for temporary housing, is limited and may require an additional premium. Landscaping, pools, and detached structures may have restricted coverage or be excluded.
The deductible structure is the part that surprises most buyers. A 10 to 15 percent deductible is standard, and it applies to the dwelling coverage amount, not the loss. On a $400,000 home with a 15 percent deductible, you pay the first $60,000 of earthquake damage yourself. The policy is really catastrophic protection: it keeps a major quake from wiping you out financially, but it will not help much with moderate damage that falls under the deductible.
Is it worth it where you live?
The decision comes down to three questions. Can you afford to rebuild without insurance? A total loss without coverage means paying a mortgage on a destroyed home while finding somewhere else to live. What is your home’s construction? Older masonry and unreinforced homes suffer far more damage than modern wood-frame construction, which makes the coverage more valuable. And what does the deductible mean for you? If a 15 percent deductible exceeds your savings, the policy still protects against catastrophic loss, but you should understand that smaller quakes will be entirely out of pocket.
Only about one in eight eligible California homeowners carries earthquake insurance, largely because of the cost and the high deductibles. That low uptake is itself a risk signal: after a major quake, uninsured homeowners compete for the same contractors and the same limited federal disaster assistance, which covers only a fraction of rebuilding costs.
Ways to lower the premium
Seismic retrofitting is the most effective move: bolting the home to its foundation and bracing cripple walls reduces expected damage and earns real discounts. Choosing a higher deductible lowers the premium, though it increases your out-of-pocket exposure. Bundling the earthquake policy with your homeowners carrier sometimes helps. And in California, the CEA’s premium calculator gives a reasonably accurate quote in minutes, which is worth doing before you assume the coverage is unaffordable.
Related guides
Keep reading on Insights on Insurance:
- Does Homeowners Insurance Cover Flood Damage?
- How Much Does Homeowners Insurance Cost in 2026?
- How Do Home Insurance Deductibles Work?
Frequently asked questions
Can I buy earthquake insurance right after a quake? Usually not. Insurers typically impose moratoriums on new earthquake policies immediately after a significant earthquake in the affected area. Buy before you need it.
Does earthquake insurance cover aftershock damage? Aftershocks within a defined window, often 72 hours to a few weeks depending on the policy, are usually treated as part of the same occurrence, meaning one deductible. Later aftershocks may count as separate events.
Do renters need earthquake insurance? Renters can buy earthquake coverage for their belongings and additional living expenses. The building itself is the landlord’s responsibility. If you rent in a high-risk area, a renters earthquake endorsement is inexpensive.
What to ask your agent before you buy
Ask whether earthquake coverage is available as an endorsement on your current homeowners policy or only as a standalone policy, and price both. Ask what the deductible percentage options are and calculate the dollar amount for each. Ask what personal property and loss of use limits are included, since the defaults are often thin. Ask whether seismic retrofitting you have done, or plan to do, qualifies for a discount and what documentation is needed. And in California, ask whether the quote is through the CEA or a private carrier, and how the two compare on coverage and price.
