How much does earthquake insurance cost? It depends far more on where you live than almost any other type of home cover. A typical earthquake policy in California can run roughly $800–$2,500 a year, while the same home in a low-risk state might cost only a few hundred dollars — and in some low-risk areas earthquake cover is a cheap add-on to a standard policy. The biggest drivers are your state's seismic risk zone, your home's replacement value, and your deductible, which for earthquake cover is usually a percentage of the home's value rather than a flat dollar amount.
This free estimator gives you a planning number in seconds. Answer four quick questions and you will see an estimated monthly and annual premium range for 2026, plus the dollar amount of your deductible — the number that matters most when an earthquake actually hits. It takes less than a minute, and it makes every real quote you collect afterward much easier to judge.
What moved your estimate most
The range spans ±20% around the central estimate to reflect how much earthquake quotes differ between insurers and locations for the same home.
How we estimate
This tool is deliberately simple and transparent. Every estimate follows the same formula:
Estimated annual premium = (dwelling coverage ÷ 1,000 × base rate for state risk zone) × deductible × construction
The base rate is the approximate annual premium per $1,000 of dwelling coverage for that state risk zone — a typical national planning figure, not an insurer's filed rate. Each of your answers then adjusts it with a multiplier:
- State base rate (per $1,000 of coverage per year): California ~$3.50 · Alaska ~$2.80 · Washington ~$1.60 · Oregon ~$1.20 · Utah ~$1.40 · Nevada ~$1.20 · Missouri ~$1.00 · Tennessee ~$0.90 · South Carolina ~$0.80 · Idaho ~$0.70 · Montana ~$0.60 · Hawaii ~$0.50 · other western states ~$0.40 · other states (low risk) ~$0.25. California and Alaska sit at the top because of their fault systems and claims history; the New Madrid zone states (Missouri, Tennessee) price higher than their neighbours because a major fault runs through them even though quakes are less frequent.
- Deductible (0.75 – 1.25): 5% deductible 1.25 · 10% 1.00 · 15% 0.85 · 20% 0.75. Earthquake deductibles are percentages of the dwelling limit, so on a $400,000 home a 10% deductible is $40,000 out of pocket before cover pays anything.
- Construction (0.90 – 1.30): wood frame 1.00 · steel / concrete frame 0.90 · brick / masonry 1.30. Wood frames flex in a quake; unreinforced masonry is the most vulnerable common construction type and typically costs the most to insure.
- Dwelling coverage: scales directly — doubling the coverage limit roughly doubles the premium, which is why the limit should reflect replacement cost, not market value.
The estimate assumes a standalone earthquake policy or endorsement covering the dwelling at replacement cost. It does not price contents, additional living expenses or separate structures in detail, and it does not account for soil type, home age or retrofit work — all of which real insurers weigh heavily. The final number is shown as a range (±20%) because two insurers can quote the same home very differently. Treat the middle of the range as your planning number.
Frequently asked questions
How accurate is this earthquake insurance cost estimator?
It is a planning estimate, not a quote. The tool starts from an approximate base rate per $1,000 of dwelling coverage per year that varies by state seismic risk zone, then applies approximate multipliers for your earthquake deductible percentage and your home's construction type. Real earthquake quotes vary widely by exact location, soil type, home age, retrofit status and insurer, so always compare real quotes before buying.
Why is an earthquake deductible a percentage, not a dollar amount?
Unlike a standard homeowners deductible of $500 or $1,000, earthquake deductibles are usually set as a percentage of the dwelling coverage limit — typically 5%, 10%, 15% or 20%. On a $400,000 home, a 10% deductible means you pay the first $40,000 of earthquake damage yourself. That is why the deductible choice matters far more for earthquake cover than for ordinary home insurance: a higher percentage deductible lowers the premium but leaves a much larger gap to cover out of pocket.
Does standard homeowners insurance cover earthquakes?
In most US states, a standard homeowners policy does NOT cover earthquake damage — it is excluded and must be bought as a separate endorsement or a standalone earthquake policy. California is the notable exception in one respect: insurers that sell homeowners insurance in California must offer earthquake coverage, usually through the California Earthquake Authority, but the homeowner still has to buy it. If you live in a seismically active area and have no earthquake endorsement, earthquake damage to your home is generally uninsured.
How can I lower my estimated earthquake insurance premium?
The biggest levers are choosing a higher deductible percentage, which directly lowers the rate, and retrofitting the home — bolting the frame to the foundation, bracing cripple walls and strapping the water heater are the classic seismic retrofits and can earn meaningful discounts in high-risk states. Masonry and unreinforced brick homes typically cost more to insure than wood-frame homes, and keeping the dwelling coverage limit realistic (replacement cost, not market value) avoids paying for cover you do not need.
Keep reading: related insurance guides
An estimate is a starting point — these guides help you understand the risks behind it:
- Home Insurance for First-Time Buyers: What You Need (and Don't) — what a standard homeowners policy covers, what it excludes, and where earthquake cover fits in.
- Flood Insurance Cost in Florida (2026 Guide) — another commonly excluded peril, priced separately from standard home cover, with its own deductible and coverage rules.