What is a wind mitigation credit?
A wind mitigation credit is a discount on the wind portion of a homeowners premium, applied when a qualified inspector verifies hurricane-resistant construction. In Florida it is mandated by Fla. Stat. 627.0629, and a fully hardened home can see the wind premium cut by 30 to 88 percent (Florida OIR, verified May 2026).
The discount is built on a defined checklist of construction features: roof shape, roof-to-wall connection, roof deck attachment, opening protection, and secondary water resistance. In Florida these are verified on form OIR-B1-1802, valid for five years before re-inspection (Florida OIR). Other hurricane-belt states attach the credit to a different instrument. Texas grants it through the WPI-8 certificate for new coastal construction and through Fortified designations for existing homes; Alabama, Mississippi, South Carolina, and North Carolina anchor their credits in the IBHS Fortified standard.
Why it matters
A non-renewal notice or a premium that jumped 40 percent in one cycle is the moment most Florida homeowners learn what a wind mitigation credit is. The credit isn't optional: Fla. Stat. 627.0629 requires every admitted homeowners insurer in Florida to file premium discounts for seven specific construction features, from roof shape to opening protection (Florida Office of Insurance Regulation, verified May 2026).
The catch is the paperwork. A carrier doesn't apply the discount automatically; the homeowner has to put a current, qualified-inspector-signed OIR-B1-1802 inspection form on file. Skip the inspection and a hardened home (hip roof, double wraps, impact glass) pays the same wind premium as the unhardened house next door, often a four-figure annual gap on a coastal policy. The form stays valid for five years, so a 2019 inspection on a home re-roofed in 2024 is also leaving money on the table; the re-roof triggers a fresh form.
How it works
Florida is the legal floor. Fla. Stat. 627.0629(1) requires every admitted homeowners insurer to file with the Florida Office of Insurance Regulation a schedule of premium discounts, credits, or rate differentials for seven wind-mitigation construction features: roof covering (Florida Building Code compliance), roof deck attachment (nail size and spacing), roof-to-wall connection (toe-nail, clip, single wrap, double wrap), roof geometry (hip earns more than gable or flat), secondary water resistance, opening protection (impact glass or shutters meeting the Large Missile Impact standard), and wall construction (verified May 2026).
The verification instrument is the Uniform Mitigation Verification Inspection Form, OIR-B1-1802 (current revision 01/12), set by Fla. Stat. 627.711. It is signed by a licensed home inspector, licensed general / building / residential contractor, licensed architect, licensed professional engineer, or building-code official, and every admitted carrier in the state must accept it. The form is valid for five years before re-inspection, sooner if the roof is replaced or openings are upgraded to impact-rated.
Outside Florida, the credit attaches to a different instrument. The Texas Windstorm Insurance Association accepts the WPI-8 Certificate of Compliance for new coastal construction and IBHS FORTIFIED Roof or FORTIFIED Home designations on existing homes. South Carolina mandates mitigation credits through its Safe Home program and publishes a Hurricane Mitigation Discount Calculator. Alabama law mandates premium discounts for FORTIFIED designations and pairs them with Strengthen Alabama Homes grant funding. North Carolina and Mississippi grant filed-rate credits through the NCIUA and MWUA respectively. The IBHS FORTIFIED program is the common engineering standard across the non-Florida coastal mandate states; designations run on a five-year cycle.
Discounts apply to the wind or hurricane premium component only, not the All Other Perils portion. Florida OIR consumer guidance puts cumulative discounts at roughly 30 to 88 percent of the wind premium for a fully hardened newer home and near zero on a pre-1994 gable-roof home with toe-nails; carrier-filed rate schedules vary.
Who it affects
If your home sits in the hurricane belt, the credit may already be on your policy, or unused and leaving money on the table. Florida is the strictest framework: every admitted homeowners insurer must file discounts for seven specific construction features under Fla. Stat. 627.0629(1) (Florida Office of Insurance Regulation, verified May 2026). South Carolina mandates mitigation credits under Title 38 Chapter 75; Alabama requires a discount for IBHS FORTIFIED designations under Ala. Code 27-31D. Texas's TWIA accepts WPI-8 certificates and FORTIFIED designations (TWIA Underwriting Manual). North Carolina's NCIUA and Mississippi's MWUA file parallel credit schedules. Outside the hurricane belt the credit is not a regulated product.
Within the belt, location and ownership shape the size of the credit. Coastal tier-1 counties pay the highest wind premiums, so the same construction features translate to more dollars on the coast than 80 miles inland. Owner-occupied primary homes get the full filed credit; investor-owned rentals are often eligible only on a filed-rate basis and some carriers exclude them. A mortgage does not block the credit; it flows to the named insured. If you just received a non-renewal notice, an unused credit can keep you in the admitted market instead of being routed to a FAIR Plan or surplus lines.
To check your own situation, pull your declarations page (look for "Wind Mit Credit" or "Hurricane Mit Credit") and compare it against your most recent inspection report. In Florida the canonical form is the OIR-B1-1802, valid for five years. For what the inspector actually verifies, see the wind mitigation inspection.
Related terms and next steps
Wind mitigation sits next to a small cluster of inspection-and-pricing concepts. A wind mitigation inspection is the form an inspector files to claim these credits. A four-point inspection is a different document a carrier may also require: roof, electrical, plumbing, HVAC condition. And the wind/hail deductible is the separate, percentage-based deductible that often applies on the same policy.
- Ask your current carrier whether wind mitigation credits apply in your state, and which form they accept (Florida uses the OIR-B1-1802; other coastal states have similar forms).
- Hire a state-licensed inspector who does these forms regularly. Many roofers and home inspectors won't.
- Send the completed form to your agent or carrier directly. Credits typically apply at the next renewal, not retroactively.
- Compare quotes with the form in hand. The same mitigation features can produce different discounts at different carriers.
- If you're considering upgrades, check whether your state runs a grant program (Florida's My Safe Florida Home is the largest) before paying out of pocket.
Frequently asked questions
Is a wind mitigation credit only available in Florida?
No. Florida mandates the credit by statute (Fla. Stat. 627.0629); other hurricane-belt states anchor credits in the IBHS Fortified standard or, in Texas, the WPI-8 certificate.
How much can a wind mitigation credit save?
Florida credits range from a few percent on older homes to roughly 88 percent of the wind premium on a fully hardened home (Florida OIR, May 2026).
Will my insurer apply the wind mitigation discount automatically?
No. The homeowner has to file a current OIR-B1-1802 form signed by a qualified inspector; without it, no credit is applied (Florida Office of Insurance Regulation).
How long is a wind mitigation inspection good for?
Five years under Fla. Stat. 627.711. If the roof is replaced or openings are upgraded to impact-rated, a fresh inspection is required to capture the new credits.
How long is a Florida wind mitigation inspection valid?
The OIR-B1-1802 form is valid for five years per Fla. Stat. 627.711 (Florida OIR). Re-inspection is triggered earlier when the roof is replaced, openings are upgraded to impact-rated, or secondary water resistance is added.
Do wind mitigation credits apply to the whole premium?
No. Credits apply only to the wind or hurricane premium component, not the All Other Perils portion (Florida OIR). The total-bill reduction is therefore smaller than the wind-line discount percentage.
Who can sign the Uniform Mitigation Verification Inspection Form?
Five categories of qualified inspector under Fla. Stat. 627.711: licensed home inspector, licensed general / building / residential contractor, licensed architect, licensed professional engineer, or building-code official. Every Florida admitted carrier must accept the signed form.
Does the wind mitigation credit apply outside Florida?
Yes, in six hurricane-belt states. Florida's framework is the most detailed and statutory (Fla. Stat. 627.0629(1)); Alabama, South Carolina, Texas, North Carolina, and Mississippi all have parallel mechanisms anchored to the IBHS FORTIFIED standard or to state-specific certificates.
Do investor-owned rental properties qualify for the credit?
Sometimes. Some carriers extend wind-mitigation credits to investor-owned single-family rentals on a filed-rate basis; others exclude them. The statutory mandate in Florida (Fla. Stat. 627.0629(1)) applies to the insurer's rate filing, not specifically to owner-occupancy status.
Is a wind mitigation inspection the same as a four-point inspection?
No. A wind mitigation inspection documents hurricane-resistant features for premium credits. A four-point covers roof, electrical, plumbing, and HVAC condition for underwriting eligibility, not discounts.
How much does a wind mitigation inspection cost?
Costs vary by inspector and state. Ask two or three licensed inspectors for quotes before booking; many will price it alongside a roof inspection or four-point job.
Will my wind mitigation credit transfer if I switch insurers?
Usually yes, if the inspection form is current and the new carrier accepts it. The home's features haven't changed, so a new carrier should honor the credits.