Excess Flood Insurance
Excess Flood Insurance
Additional flood limits above NFIP or a primary private flood policy.
Excess flood insurance is a policy that attaches above an existing NFIP or primary private flood policy, adding limits once the underlying flood coverage is exhausted. Owners of higher-value commercial buildings whose flood exposure exceeds their primary flood limit are the typical buyers.
What excess flood does
The NFIP's commercial program caps per-building coverage well below what many commercial structures are worth, and even a private primary flood policy is often written to a limit that does not match total insured value. Excess flood closes that gap by attaching above the primary flood limit and following its terms, subject to its own policy conditions.
This is a distinct purchase from primary private flood, which provides the ground-up coverage itself. Excess flood only responds once the underlying limit is exhausted, so it is priced and underwritten differently, largely as a function of the attachment point rather than first-dollar risk.
Who needs it
Owners of buildings with values well above NFIP's per-building program limit are the clearest buyers, particularly in mapped flood zones where a lender requires flood coverage matched to loan value. Owners who have already purchased primary private flood but still have a gap between that limit and total insured value are the other common buyer profile.
Portfolio owners with multiple buildings in flood-prone areas often use excess flood to normalize coverage across a schedule rather than negotiating a different primary limit at every location.
What it covers and excludes in practice
Excess flood typically follows the definitions and covered causes of loss in the underlying primary policy — surface water, storm surge, and overflow of a body of water — and pays once that primary limit is exhausted, up to the excess policy's own limit. Because it follows form, the quality of the underlying flood policy's wording matters more than usual; a narrow primary form limits what the excess layer will ultimately pay for.
Excluded in practice: any peril not covered by the underlying primary flood policy, and, on many forms, business income unless the underlying policy also covers it and the excess form is written to follow that coverage. Gaps between the primary limit and the excess attachment point — sometimes called a coverage gap — must be checked carefully at placement.
What drives price and how to structure it
Attachment point, total desired limit, flood zone, and the quality of the underlying primary policy are the main underwriting factors; a well-structured primary layer with a clean, broad form typically produces better excess terms. Building value, occupancy, and construction also factor in as they would for the primary layer.
The key structuring decision is confirming that the excess attachment point sits exactly at the primary limit with no gap, and that both policies define covered flood perils and business income consistently so a loss does not fall into a seam between the two.
What it typically responds to
- Limits above the primary flood policy. Coverage attaches once the underlying NFIP or private primary flood limit is exhausted, subject to policy terms.
- Follow-form flood perils. Typically mirrors the covered causes of loss in the underlying primary flood policy.
- Business income, where the primary form includes it. Excess business income coverage generally requires the underlying policy to carry the same coverage.
- Schedule-wide limit normalization. Can be structured across a multi-building portfolio to bring all locations to a consistent total limit.
Common exclusions
- Perils not covered by the underlying policy. Excess flood cannot broaden coverage beyond what the primary policy insures.
- Gaps between primary limit and excess attachment. A misaligned attachment point can leave an uninsured layer between the two policies.
- Coverage inconsistent with the primary form's definitions. Excess terms generally follow the primary policy's definitions of covered loss.
What drives price
- Attachment point
- Where the excess layer begins relative to the primary limit affects available terms.
- Quality of the underlying primary policy
- A broad, well-structured primary form typically produces better excess terms.
- Flood zone and building value
- Same geographic and valuation factors as the primary layer feed into excess pricing.
- Total desired limit
- Higher total program limits require more excess capacity and layered structuring.
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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