Earthquake Difference-in-Conditions (DIC) Insurance
Earthquake Difference-in-Conditions (DIC) Insurance
Fills the earthquake gap most commercial property forms exclude or sublimit.
Earthquake difference-in-conditions (DIC) insurance is a standalone or excess policy that responds to earthquake shock, aftershock, and related sprinkler leakage damage that a standard commercial property policy typically excludes or sublimits. Owners and operators of buildings in seismically active areas, and lenders that require earthquake limits as a loan condition, are the typical buyers.
What earthquake DIC does
A commercial property policy is built around fire, wind, and water perils; earthquake is usually carved out entirely or capped at a sublimit that would not come close to rebuilding a damaged structure. Earthquake DIC sits alongside — and sometimes literally on top of — that property program, providing the ground-shaking limit the underlying policy does not. It is written either as a standalone policy naming the property policy as underlying insurance, or as a scheduled endorsement that mirrors the property form's structure, business income, and extra expense definitions.
This is not the same purchase as the earthquake sublimit many property policies already include. A sublimit of a few hundred thousand dollars on a policy insuring a multimillion-dollar structure is a placeholder, not real earthquake capacity; DIC is the product that actually matches limits to exposure.
Who needs it
Owners of masonry, tilt-up, or unreinforced buildings in higher-hazard zones are the clearest candidates, but frame construction is not immune to shake damage or the sprinkler leakage that often follows a quake event. Lenders financing commercial real estate in seismically active regions frequently require a certificate showing dedicated earthquake limits as a condition of the loan, independent of what the base property policy carries.
Among the states this program is licensed in, California and Nevada carry the most seismic activity and the most frequent underwriting attention, though earthquake DIC is available and occasionally purchased in other states where a portfolio includes seismic exposure or a lender requires it.
What it covers and excludes in practice
Typical DIC coverage responds to direct physical damage from earth movement, including shock, landslide, and fire following earthquake where the underlying policy's fire coverage does not apply cleanly, plus resulting business income loss on the same trigger. Policies are usually written with a percentage deductible applied to the building value rather than a flat dollar deductible, which is one of the more important terms to review before binding.
Excluded in practice: flood following an earthquake unless separately endorsed, land or soil subsidence unrelated to seismic shaking, and damage to property that was already structurally compromised before the policy incepted. Business income coverage typically follows the same waiting period and coinsurance structure as the underlying property form, and coordination between the two policies' definitions matters more than the individual wording of either one.
What drives price and how to structure it
Underwriters price primarily on construction type, soil class, proximity to known fault lines, and the age and retrofit status of the structure — a building with documented seismic retrofit work is treated very differently from one without. Deductible percentage, total insured value, and whether the placement is standalone or DIC-over-underlying also move terms materially.
The most common structuring mistake is placing DIC without confirming the underlying property policy's definitions of business income and extra expense line up; a mismatch can leave a gap exactly where the buyer needed continuity. Coordinating both placements with the same broker, and confirming lender-required limits before renewal, typically produces cleaner claims outcomes.
What it typically responds to
- Ground shaking and aftershock. Direct physical damage from earthquake shock and subsequent aftershocks, subject to policy terms.
- Sprinkler leakage from shaking. Water damage caused by fire-suppression systems dislodged during a seismic event.
- Business income and extra expense. Lost income and continuing operating expense tied to earthquake-caused shutdown, typically mirroring the underlying property form.
- Fire following earthquake. Fire damage triggered by a seismic event where the base property policy's fire trigger is ambiguous.
- Landslide and earth movement. Damage from earth movement directly caused by seismic activity, subject to soil and geotechnical underwriting.
Common exclusions
- Flood. Water damage from tsunami, dam failure, or general flooding following a quake is typically excluded absent separate flood coverage.
- Pre-existing structural defects. Damage attributable to deterioration or defects that predate the policy period.
- Land subsidence unrelated to seismic activity. Settling or subsidence not directly caused by an earthquake event.
- Contents and inventory beyond scheduled limits. Business personal property is only covered to the extent scheduled and valued in the policy.
What drives price
- Construction type
- Unreinforced masonry and tilt-up construction underwrite less favorably than steel or reinforced concrete.
- Soil and fault proximity
- Geotechnical soil class and distance to mapped faults are core rating factors.
- Retrofit status
- Documented seismic retrofit work materially changes underwriting outcomes.
- Deductible percentage
- Deductibles are usually structured as a percentage of value, and the chosen percentage drives available terms.
- Total insured value and limit structure
- Whether DIC is standalone or excess-over-underlying changes how limits and attachment points are priced.
Provident does not publish premium figures. Pricing is set by each carrier and depends on the specific risk.
Questions we get asked
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