Impact Windows Insurance Discount Florida: How the Wind-Mitigation Credit Works (2026)

If you own a home in Florida, you are likely paying some of the highest homeowner's insurance premiums in the country. What most homeowners do not realize is that impact windows are one of the upgrades Florida law requires insurers to recognize with a wind-mitigation discount on the hurricane-wind portion of the premium.

This guide explains how the discount works, what decides the amount, what documentation you need, and the step-by-step process to claim your discount after installation.

Florida Law Requires Insurers to Offer This Discount

This is not a voluntary program. Under Florida Statute 627.0629, every insurance company offering residential property insurance in Florida is required by law to provide premium discounts, credits, or rate differentials for homes that have wind mitigation features, including impact-rated windows and doors.

The law exists because impact windows dramatically reduce the risk of catastrophic storm damage. When a window fails during a hurricane, wind enters the structure and can lift the entire roof from the inside out. Impact windows prevent this chain of failure, which means fewer catastrophic claims for insurers — and lower premiums for you.

The statute has been on the books since 2002, and insurers must apply the credits to the premium once you provide the required verification. Exact percentages are set in each carrier's rate filings, so they differ from company to company. Ask your agent for the specific credit your carrier gives for opening protection.

How Much Can You Save?

There is no single number. The discount depends on your insurer, your home, and what the OIR-B1-1802 form documents. A few factors decide it:

• Your insurer: each carrier sets its wind-mitigation credits in its own rate filings
• Your home: roof covering, roof deck attachment, roof-to-wall connection and roof shape are rated alongside opening protection
• Your opening-protection class: whether every opening is protected, and to which standard (see the Category A, B, C and N classes below)

The practical step: ask your agent for a quote with and without the opening-protection credit before you start. Over time, insurance credits can offset part of the cost of the project, alongside energy savings from better glass.

Why the Wind Portion Matters

Florida homeowner's insurance is split into components. The wind or windstorm portion is often a large share of the premium in South Florida. The impact window discount applies specifically to this component — not to the whole policy — which is why it matters most in hurricane-prone counties like Miami-Dade, Broward, and Palm Beach.

What You Need to Qualify for the Maximum Discount

To receive the full insurance discount for impact windows in Florida, four things must be true.

1. All openings must be protected

Insurance companies require that every opening in the home — windows, doors, skylights, and garage doors — be protected by either impact-rated products or approved shutters. Partial coverage may result in a partial or no discount, depending on the carrier.

2. Products must carry Florida approvals

Impact windows must hold a Miami-Dade County Notice of Acceptance (NOA) or a Florida Product Approval number. This verifies that the products were tested and certified to meet the Florida Building Code. Brands like PGT, ESW (ES Windows), and Mr. Glass all carry the required approvals.

3. Installation must be permitted and inspected

The windows must have been installed by a licensed contractor with a valid building permit, and the work must have passed final inspection with the local building department. Unpermitted work does not qualify and can create serious problems when filing a claim.

4. You must complete a wind mitigation inspection

A licensed wind mitigation inspector must visit your home and complete Form OIR-B1-1802, the official Florida Wind Mitigation Report. This form documents your home's opening protection and is submitted to your insurer to apply the discount.

What Is the Wind Mitigation Inspection and What Does It Cost?

The wind mitigation inspection is a formal evaluation performed by a licensed inspector — typically a home inspector, engineer, or certified contractor. The inspector examines your windows, doors, roof, and other structural elements and documents everything on the state-approved OIR-B1-1802 form.

The inspection typically costs between $75 and $150 and is valid for five years.

The inspector will document:

• Product approval numbers for each window and door
• Installation method and framing details
• Permit records and contractor information
• Photographs of all protected openings

Step-by-Step: How to Claim Your Discount

Step 1: Install impact windows through a specialist who coordinates the required permits. Vieser Construction handles the full process including measurement, permitting, installation, and final inspection.

Step 2: Wait for the final building inspection to be approved. This is the official sign-off that confirms the installation meets Florida Building Code requirements.

Step 3: Hire a licensed wind mitigation inspector to complete the OIR-B1-1802 form. Your contractor can often recommend a trusted inspector.

Step 4: Submit the completed wind mitigation report and supporting documentation to your insurance company. Most carriers accept this directly or through your agent.

Step 5: Your insurer applies the discount. For existing policies, some carriers apply the discount mid-term. For new policies, the discount is reflected at your next renewal.

The OIR-B1-1802 Form: What It Documents

The OIR-B1-1802 is the state's Uniform Mitigation Verification Inspection Form. Your insurer uses it to decide which wind credits apply to your policy. It records these features of the home:

• Roof covering and its permit or code compliance
• Roof deck attachment
• Roof-to-wall connection
• Roof shape
• Secondary water resistance
• Opening protection: whether every window, door, skylight, and garage door is protected. This is the section that impact windows and doors improve.

In the opening-protection section, the inspector assigns a class to the home based on the weakest protected opening:

• Category A: all glazed openings protected by products verified to the large-missile (9-lb) impact standards, such as Miami-Dade NOA or Florida Product Approval impact windows and doors.
• Category B: all glazed openings protected by products verified to a lower large-missile impact level (4 to 8 lb).
• Category C: openings protected by wood structural panels (plywood or OSB) that meet the Florida Building Code.
• Category N: products that appear to be impact-rated but cannot be verified, or coverings that cannot be identified as A, B or C. (A separate X class means one or more openings is not protected.)

Category A typically earns the largest opening-protection credit, but the amount still depends on your insurer and your home.

For a full walkthrough of each section, see our wind mitigation inspection guide.

Checklist: From Installation to Insurer Credit

1. Confirm the permit passes final inspection and closes with the building department.
2. Gather your product approval numbers (NOA or Florida Product Approval), permit records, and final inspection sign-off.
3. Check that every opening is protected, including doors, skylights, and the garage door.
4. Book a wind mitigation inspection with a qualified, licensed inspector (typical range $75 to $150).
5. Receive the completed OIR-B1-1802 form and photos.
6. Send the form to your insurance agent or carrier and request a re-rating in writing.
7. Follow up until the corrected premium or credit appears on your policy.
8. Keep a copy of the report for renewals, since carriers may ask for an updated one after several years or after changes to the home.

Timing and Cost at a Glance

Costs and timelines are typical ranges, not guarantees. Your carrier's filed rates determine your actual credit.

How Much Does the Documentation Cost?

Here is a realistic breakdown of the costs to access your insurance discount:

• Wind mitigation inspection: $75 to $150
• No additional fees — your contractor provides the permit and product approval records as part of the installation

The documentation cost is small compared to the project itself, and the same report supports your opening-protection credit for as long as it remains valid.

Will Partial Coverage Qualify?

Replacing only some windows may result in a reduced discount or no discount, depending on your carrier. The state's wind mitigation framework rewards complete opening protection. If budget is a concern, it is worth contacting your insurance company before installation to understand exactly how their discount tiers work. In some cases, phasing the project strategically — covering all openings in stages while maintaining shutter protection on the remainder — can help maintain eligibility.

What About the My Safe Florida Home Program?

The My Safe Florida Home (MSFH) Program is a state-administered initiative that previously offered free wind mitigation inspections and matching grants of up to $10,000 for eligible homeowners to fund wind mitigation upgrades including impact windows. Funding has historically been exhausted quickly each time the program opens. It is worth checking the Florida Division of Emergency Management website to see if the program is currently accepting applications, as it can significantly reduce the out-of-pocket cost of your project.

How Impact Windows Compare to Hurricane Shutters for Insurance Purposes

Both impact windows and hurricane shutters can qualify you for wind mitigation discounts. However, there are meaningful differences in how carriers treat them:

Impact windows qualify as permanent opening protection and are recognized year-round. Shutters must be deployed to be effective and some carriers may require documentation that shutters are properly maintained and accessible. Impact windows also eliminate the annual cost and labor of deploying and storing shutters, which can add up over time.

From a pure insurance standpoint, the OIR-B1-1802 form rates impact windows and approved shutters by the same opening-protection categories — the class depends on the impact standard the products are verified to, not on whether they are glass or shutters.

How Windows Stock Market Helps You Save More

The biggest obstacle for most homeowners is the upfront cost of a full impact window installation. Windows Stock Market addresses this directly by offering verified in-stock impact windows from local sellers at 30 to 60 percent below retail pricing.

These are brand-name products — PGT, ESW, and Mr. Glass — that carry all required Florida approvals and NOA certifications. Buying in-stock means the material cost is significantly lower than a custom factory order, while eligibility for the wind-mitigation credit is the same.

Combined with professional installation through Vieser Construction with full permitting and inspection services, a complete impact window project through Windows Stock Market can be one of the most financially sound home improvements you make in Florida.

Related Guides

• Impact window cost in Florida
• Wind mitigation inspection guide (OIR-B1-1802)
• Permit guide: Broward, Miami-Dade and Palm Beach
• PGT vs ESW vs Mr. Glass comparison
• Impact windows in Broward County
• Impact windows in Miami-Dade County
• Impact windows in Palm Beach County

Ready to protect your home? Browse in-stock impact windows at Windows Stock Market or call us for a free estimate at (754) 303-7130.