Earthquake Insurance Deductible ROI Calculator
Earthquake insurance has steep deductibles — 10-25% of home replacement cost is standard. A $500,000 home with a 15% deductible means you pay the first $75,000 of damage. Calculate whether premiums make sense given your shake risk.
Why Earthquake Coverage Costs So Much
Earthquake risk is geographically concentrated and catastrophic in nature. Insurers price the high tail-risk premium because a single quake (1989 Loma Prieta, 1994 Northridge) generates billions in claims. CEA charges 0.15-0.35% of home value annually in California — about $1,000-$3,000 on a $1M home.
Deductible Structures
Unlike homeowners insurance (fixed dollar deductibles), earthquake policies use percentage deductibles: 10%, 15%, 20%, or 25% of dwelling coverage. A $500,000 dwelling at 15% deductible means you pay the first $75,000 before insurance pays a dime. This makes coverage primarily for catastrophic loss, not cosmetic damage.
Who Should Buy
High-risk zones (Hayward Fault, San Andreas, Cascadia Subduction Zone, New Madrid Seismic Zone) with mortgage requiring coverage. Older unreinforced masonry, soft-story buildings, and homes on liquefaction-prone soil. Self-insurers should hold liquid cash equal to the deductible at minimum.
Source: USGS National Seismic Hazard Maps, California Earthquake Authority rate filings, FEMA HAZUS-MH loss estimation. Last updated: May 2026.