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Do You Need Earthquake Insurance?
Risk data from USGS earthquake probability estimates (via askdoss.com) and California Earthquake Authority coverage figures, updated August 2026.
Most homeowners in earthquake-prone states go without coverage. The risk data suggests that is a riskier default than it feels like day to day. Here is how to actually think about the decision.
Data sourced from USGS (via secondary source), California Earthquake Authority
The gap between real risk and actual coverage
Only about 13% of California homeowners currently carry earthquake insurance. That is a strikingly low number given the state's documented seismic risk: the U.S. Geological Survey estimates a 72% probability of at least one magnitude 6.7 or greater earthquake hitting the San Francisco Bay Area before 2043, and a 60% probability of a comparable earthquake in Southern California over the same window.
The overwhelming majority of California homeowners are, in effect, self-insuring against a risk that federal scientists consider more likely than not to materialize somewhere in the state within the next two decades.
Why the gap exists, and why it is a mistake worth correcting
Part of the gap is a genuine misunderstanding: standard homeowners policies exclude earthquake damage entirely, no partial coverage, no exception, and some homeowners do not realize that until after a loss.
Part of it is cost and the size of the percentage deductible, both real, disclosed tradeoffs rather than reasons to dismiss coverage outright. And part of it is a common but mistaken assumption that federal disaster aid would cover a significant earthquake loss the way insurance would.
In practice, federal disaster assistance after a major disaster is typically far more limited than a homeowner expects, frequently capped well below the cost of rebuilding a home, and is not a substitute for a real insurance payout.
Who should take this decision seriously
California carries the deepest, best-documented risk and the most developed market for coverage, through the California Earthquake Authority (CEA). Washington and Oregon sit on the same Cascadia Subduction Zone, a roughly 700-mile fault line capable of a magnitude 8 to 9 "megathrust" event, and both states have an active private earthquake insurance market as a result.
Outside these three states, seismic risk and the corresponding insurance market both drop off sharply, which is also why sourced cost data is concentrated here rather than spread thin across all 50 states with invented figures for places with minimal real risk.
If you own a home in any of these three states, earthquake coverage is worth pricing out specifically, not assumed away by default the way most homeowners currently do.
The deductible is the real decision, not just the premium
Once you decide coverage is worth pricing out, the harder question is the deductible, since earthquake policies use a percentage of your dwelling coverage rather than a flat dollar figure.
Moving from a 5% deductible to a 25% deductible cuts the premium by roughly 28%, a real savings, but it also multiplies how much cash you need on hand before the policy pays a dollar.
The honest way to choose is to work backward from what you could actually produce in cash after a major quake, not just from which premium looks most affordable today.
Frequently asked questions
Does my regular homeowners policy cover earthquake damage at all?
No, not any of it. Standard homeowners policies in the United States exclude earthquake damage entirely, with no partial coverage or exception. Earthquake coverage has to be purchased as a separate policy or endorsement, most commonly through the California Earthquake Authority (CEA) in California, or a private carrier in Washington and Oregon.
If earthquake risk is real, why do so few California homeowners actually carry coverage?
The honest answer is a mix of cost, the size of the percentage deductible, and a common but mistaken assumption that a bad-enough earthquake would trigger some form of federal disaster aid covering the gap, which is far more limited than most people expect and generally does not replace an insurance payout.
Awareness of the standard homeowners exclusion also plays a role, some homeowners simply do not realize earthquake damage is not covered at all until after a loss.
Is earthquake insurance only worth it in California?
California carries the deepest and most well-documented risk and the most developed insurance market (the CEA), but Washington and Oregon sit on the same Cascadia Subduction Zone and both have an active private earthquake insurance market.
Most of the rest of the country has comparatively low seismic risk and little to no dedicated earthquake insurance market, which is why meaningful cost data is concentrated in these three states.
If I decide to buy coverage, how do I pick a deductible level?
Treat it as a tradeoff between your premium and how much cash you could actually produce after a major quake. Moving from a 5% deductible to a 25% deductible cuts the premium by roughly 28%, but it also means a much larger out-of-pocket amount has to occur before the policy pays anything.
If you could not comfortably cover a 25% loss in cash, a lower deductible may be worth the higher premium despite the smaller discount.