Many Illinois homeowners policies now carry a separate wind and hail deductible, distinct from your standard deductible — and increasingly, it's calculated as a percentage of your home's insured value (commonly 1% to 2%) rather than a flat dollar amount. On a home insured for $300,000, a 1% wind/hail deductible means you're responsible for the first $3,000 of any hail or wind claim; at 2%, it's $6,000.

This has caught a real number of homeowners off guard, since many policies shifted from flat $1,000–$2,500 deductibles to percentage-based ones at renewal without it being obvious what changed.

Why this deductible exists — and why it's different

Wind and hail claims are a major driver of homeowners insurance losses in Illinois, which sits in an active severe-weather corridor for the Midwest. To manage that risk, many carriers now separate wind/hail claims out from your standard deductible (which still typically applies as a flat amount — often $1,000 to $5,000 — to things like fire, theft, or water damage) and apply a different, often percentage-based, structure specifically to storm-driven claims.

How to check what you actually have

Your policy's declarations page will show whether you have a separate wind/hail deductible, usually listed as "windstorm or hail deductible" alongside — but distinct from — your standard deductible. If you see a percentage instead of a dollar figure, that's your signal to do the math against your dwelling coverage amount, not your home's market value.

A quick way to estimate your real exposure

Percentage deductibles are calculated against your dwelling coverage limit (sometimes called "Coverage A"), not your claim total:​

  • $250,000 dwelling coverage, 1% deductible = $2,500 out of pocket
  • $400,000 dwelling coverage, 1% deductible = $4,000 out of pocket
  • $400,000 dwelling coverage, 2% deductible = $8,000 out of pocket

In the Chicago metro area, where home values run higher than the state average, percentage-based deductibles can represent significantly more out-of-pocket exposure than homeowners expect going into a claim.

One more thing worth checking: ACV vs. RCV on your roof

Separately from the deductible question, many Illinois insurers have shifted toward Actual Cash Value (ACV) settlement specifically for older roofs — commonly roofs over about 10 years old — rather than full Replacement Cost Value (RCV). Under ACV, your payout is reduced to reflect the roof's depreciated value, not what a new roof actually costs, which can leave a real gap between what insurance pays and what replacement costs. It's worth confirming which basis applies to your roof specifically, since it changes the math substantially on an older roof.

What this means practically​

  • Filing a claim itself doesn't cost anything — the deductible only applies against an approved claim, and only to the amount paid out.
  • A single weather-related claim generally doesn't get a policy dropped in Illinois, though multiple claims in a short window can affect renewal terms.
  • Knowing your actual deductible amount before a storm hits helps you make a clear-headed decision about whether filing makes financial sense for a given amount of damage.

Frequently asked questions

Is a percentage-based wind/hail deductible standard in Illinois, or does it depend on my insurer?
It varies by carrier and by policy — some insurers have moved most of their book to percentage-based deductibles, others still offer flat-dollar options. Your declarations page is the only reliable way to know what you actually have.

Can I change from a percentage deductible back to a flat one?
Sometimes, depending on your carrier — it's worth asking your agent directly, since it may affect your premium either direction.

Does a wind/hail deductible apply separately for the roof and other storm damage, like siding or gutters?
Typically, the wind/hail deductible applies to the whole covered claim for that storm event, not per component — but policy language varies, so confirm with your specific declarations page or agent.

Last updated: August 2026. This is general educational information, not insurance or legal advice — review your own policy or talk to your agent for specifics. If you're assessing storm damage and want documentation to support a claim, schedule a free AI drone roof inspection with RS Five.