Professional services
Flood Insurance Calculator
Flood premium from zone, elevation and cover, for the peril standard policies exclude.
Result
An estimating tool, not insurance advice and not a quote. Underwriting sets real premiums on factors no calculator sees. What cover is appropriate is a question for a licensed broker. Flood is excluded from every standard homeowners policy. Cover comes through the national programme or private insurers, and programme limits cap building and contents cover well below the value of many homes, with excess flood cover needed above that. Most policies carry a waiting period before cover starts, so buying as a storm approaches does not work. Roughly a quarter of flood claims come from outside high-risk zones.
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About this calculator
Do I need it if I am not in a flood zone?
Zone X is lower risk, not no risk, and a substantial share of claims come from outside the high-risk zones. Premiums there are correspondingly low.
Why does elevation matter so much?
Because depth of water drives the loss. Each foot above base flood elevation cuts expected damage sharply, and an elevation certificate can reduce the premium substantially.
Is there a waiting period?
Usually, typically thirty days for the national programme with limited exceptions. Cover cannot be bought once a storm is forecast.
The formula
premium = cover / 1000 x base rate x zone factor x elevation factor, less deductible credit
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