Wind and hurricane deductibles: why the number bites
A percentage wind deductible is calculated against your building's value, not your loss — so '5%' on a $5M building is a $250,000 retention. Here's how these work and how to keep them survivable.
The three deductible types
Most buyers focus on a single deductible figure. Commercial property policies — especially in storm-exposed regions — often carry more than one, and they're calculated differently:
- Flat (all-other-perils) — a fixed dollar amount per loss (e.g. $10,000), applying to fire, theft, and most non-storm losses.
- Percentage wind/hail — a percentage of the insured value, not the loss, applying to any wind or hail damage.
- Named storm — a percentage applying only to declared, named storms (hurricanes and named tropical systems).
Why the wind number is different — and dangerous
Here's the trap: a percentage wind deductible is calculated against the insured value, not the size of the loss. That's where the sticker shock lives.
On a $5,000,000 building with a 5% named-storm deductible, the owner absorbs the first $250,000 of storm damage before coverage responds. Owners routinely read "5%" as a small number and discover at claim time that it's a quarter-million-dollar retention.
Never accept a percentage wind deductible as a percentage. Convert it to actual dollars against the building's value before binding, and confirm the business could absorb that amount after a storm. This single step prevents the most common catastrophe-claim surprise.
Named storm vs. all wind
The distinction matters more than almost anything else on a coastal policy. A named-storm deductible triggers only on an officially named event, so ordinary wind and hail losses fall under the smaller flat deductible — better for the insured. An all-wind percentage deductible applies to any wind event, named or not.
In catastrophe-exposed markets, carriers increasingly push the broader all-wind version. It's worth confirming which one is actually on your policy, because the difference can be tens of thousands of dollars on a routine hailstorm.
Stacked deductibles
In coastal and storm-prone areas, expect two deductibles working together: a flat all-other-perils deductible for everyday losses, and a separate percentage wind or named-storm deductible for major events. Reading only the flat number gives a false sense of your true retention.
Higher deductibles lower the premium — but only up to the point the business can actually absorb them. A wind deductible buy-down (available by endorsement, subject to appetite) can bring a punishing percentage retention down to a level you can survive.
Frequently asked questions
Against the insured value of the property, not the amount of the loss. A 5% deductible on a $2M building is $100,000, applied before coverage responds — regardless of whether the loss is larger or smaller.
A named-storm deductible only applies to officially named events (hurricanes, named tropical systems); ordinary wind/hail then falls under the smaller flat deductible. An all-wind deductible applies the percentage to any wind event. Named-storm is generally better for the insured.
Often yes — a wind deductible buy-down is available by endorsement, subject to appetite and underwriting, and can bring a percentage retention down to a more absorbable level.
Storm-exposed policies commonly stack a flat all-other-perils deductible for everyday losses with a separate percentage wind/named-storm deductible for major events. Always check both, not just the flat number.