Impact-resistant shingle insurance discounts range from roughly 5% to 35% off the premium, but the size depends less on the shingle and more on your state’s legal regime and hail history. Only a few states, led by Texas, require insurers to offer a discount at all. Everywhere else the credit is voluntary and set by the carrier. This report ranks how the discount works state by state, separates the states that mandate it from those where it is optional, and ties each state’s discount size to its actual hail-loss burden.
Key findings
- Texas set the template. In 1998 it became the first state to require insurers to offer a hail-resistant roof discount, with credits reaching 35% for a UL 2218 Class 4 roof in the highest-hail zones (Texas Department of Insurance, 1998).
- Three legal regimes, not one. States fall into mandatory-offer (Texas), regulated FORTIFIED-minimum (Alabama, Louisiana), and purely voluntary carrier programs (most of the country).
- Alabama regulates a minimum. Since 2009, Alabama law has required a premium discount for FORTIFIED roofs, with credits of 20% to 55% off the wind portion of the premium (Code of Alabama Title 27, Chapter 31D).
- The discount tracks hail losses. The five states with the most hail claims (Texas, Colorado, Nebraska, Missouri, Kansas) are also where the largest Class 4 discounts appear (National Insurance Crime Bureau, 2024).
- Carriers differ widely. State Farm reports up to 35% in some states; USAA up to 15% nationally but 30% to 35% in Texas; Farmers up to 27% (carrier statements, 2025).
- The discount does not change your deductible. A Class 4 roof lowers ongoing premium; it does not shrink the separate 1% to 2% wind/hail deductible that still applies to any claim.
How the impact-resistant shingle discount actually works
A Class 4 impact-resistant roof earns a discount because it files fewer hail claims, so insurers price it lower. The discount reduces your annual premium, typically by 5% to 35% depending on carrier and state (multiple carrier statements, 2025). It is applied when you install a qualifying roof and submit proof, then it recurs each renewal as long as the roof is documented.
What varies most is whether the state compels the offer. Three distinct regimes exist, and knowing which one governs your state tells you whether you can demand the credit or only ask for it.
| Regime | What it means | Example states | Basis |
|---|---|---|---|
| Mandatory offer | Insurers must make a hail-resistant roof discount available; homeowner still must qualify and document | Texas | TDI rule, 1998 |
| Regulated FORTIFIED minimum | State sets a required discount or benchmark tied to the IBHS FORTIFIED standard, usually on the wind or hurricane portion | Alabama, Louisiana | State statute/regulation |
| Voluntary carrier program | No state mandate; each carrier decides whether and how much to discount | Colorado, Oklahoma, Kansas, Nebraska, most states | Carrier filings |
The FORTIFIED programs (Alabama, Louisiana, Mississippi) reward a roof-plus-installation standard from the Insurance Institute for Business and Home Safety, not just a shingle rating. That is why their credits attach to the wind or hurricane portion of the premium rather than the whole bill.
Impact-resistant shingle insurance discount by state (2026)
The table below ranks representative states by the typical Class 4 discount range and flags whether the credit is mandated or voluntary. Ranges are drawn from carrier statements and state insurance-department materials; individual quotes vary by carrier, ZIP-level hail zone, and policy. Treat these as bands, not guarantees.
| State | Typical Class 4 discount | Legal status | Primary driver / source |
|---|---|---|---|
| Texas | 15% to 35% | Mandatory offer | Highest hail claims in U.S.; TDI rule (TDI, 1998; NICB, 2024) |
| Alabama | 20% to 55% (wind portion, FORTIFIED) | Regulated minimum | Ala. Code Title 27 Ch. 31D (2009) |
| Louisiana | Benchmarked, phasing in by Jan 1, 2027 (hurricane portion) | Regulated (FORTIFIED) | LDI Regulation 136 (2007 statute) |
| Mississippi | Up to 55% (wind portion, FORTIFIED) | Voluntary + MWUA endorsement | Carrier/MWUA programs |
| Colorado | 15% to 35% (dwelling) | Voluntary | Second-highest hail claims (NICB, 2024) |
| Oklahoma | 10% to 20% | Voluntary | Hail belt; carrier programs |
| Kansas | 10% to 25% | Voluntary | Top-5 hail claims (NICB, 2024) |
| Nebraska | 10% to 25% | Voluntary | Top-3 hail claims (NICB, 2024) |
| Missouri | 10% to 20% | Voluntary | Top-4 hail claims (NICB, 2024) |
| Minnesota / Iowa / Dakotas | 10% to 20% | Voluntary | Northern hail belt; carrier programs |
| Illinois / Indiana | 5% to 15% | Voluntary | Carrier programs |
| Tennessee / Georgia | 5% to 15% | Voluntary | Carrier programs |
| Pacific Coast / Northeast | Minimal to none | Voluntary | Low hail frequency |
Roughly 27 states have carriers that offer an impact-resistant roof credit in at least some territories, per major-carrier disclosures (2025). State Farm alone lists the discount across more than two dozen states, from Alabama and Arkansas to Wisconsin and Wyoming.
Why the discount is bigger in some states
The discount is essentially priced off hail-claim frequency. Where hail is frequent and expensive, a Class 4 roof prevents more claims, so the credit is larger. Where hail is rare, the roof saves the insurer little and the discount shrinks toward zero.
The 2024 claim data makes the pattern concrete. Severe convective storms, which include hail, have driven more than $50 billion in insured U.S. losses annually for three straight years (industry catastrophe reporting, 2024).
| Rank | State | 2024 hail loss claims | Source |
|---|---|---|---|
| 1 | Texas | 811,381 | NICB, 2024 |
| 2 | Colorado | 395,025 | NICB, 2024 |
| 3 | Nebraska | 163,336 | NICB, 2024 |
| 4 | Missouri | 153,403 | NICB, 2024 |
| 5 | Kansas | 146,206 | NICB, 2024 |
Every state in that top five appears in the higher discount bands above. Texas, which logged the most claims and roughly $575 million in annual hail damage, is also the only state that legally requires the discount to exist (NICB, 2024). The overlap is not a coincidence: the states that legislated or where carriers compete hardest are the states hail hits most.
Carrier-by-carrier discount ranges
Even within one state, the credit swings by carrier because each files its own rating plan. The figures below come from carrier statements in 2025 and describe upper-bound discounts; your quote depends on your specific hail territory.
| Carrier | Reported discount range | Notes |
|---|---|---|
| State Farm | Up to 35% in some states | Offers the credit across 26+ states |
| USAA | Up to 15% nationally; 30% to 35% in Texas | Higher where mandated |
| Farmers | Up to 27%; ~5% to 10% in Oklahoma | Wide territory spread |
| Allstate | Varies; ~5% to 10% in Oklahoma | Percentages not broadly published |
The takeaway for shopping: in a mandated state the floor is protected, but the ceiling still comes from picking the carrier that rates hail resistance most generously. Ask each carrier for the exact Class 4 credit in your ZIP before you switch.
What actually qualifies: UL 2218 vs FM 4473
To earn any discount, the roof must carry a Class 4 rating under UL 2218 or FM 4473, the two recognized impact-resistance standards. Both assign Class 1 through Class 4; Class 4 is the highest and the only rating most carriers reward. The two tests differ in how they simulate hail.
| Standard | Published by | Projectile | Class 4 test | Pass criterion |
|---|---|---|---|---|
| UL 2218 | Underwriters Laboratories | Steel ball dropped from set height | 2-inch steel ball from 20 feet | No crack or split through the shingle; cosmetic dents allowed |
| FM 4473 | FM Approvals | Ice ball fired by air cannon | Up to 2-inch ice ball, 1.25 to 2 inch range | Same Class 1 to 4 scale; no through-crack |
UL 2218 is the more commonly cited standard on shingle spec sheets. FM 4473 launches ice balls to mimic real hail behavior more closely, but for discount purposes carriers generally accept a Class 4 rating under either. The rating certifies the shingle in a lab; it does not guarantee a specific roof survives a specific storm.
How to claim the discount: documentation checklist
Carriers will not apply the credit automatically. You have to prove the roof qualifies, then confirm the discount posted to your policy. The process is short but every step matters.
- Get the manufacturer certificate. Obtain the product data sheet or certificate showing the shingle’s UL 2218 (or FM 4473) Class 4 rating by name and product line.
- Keep the paid invoice. Save the roofing contractor’s paid invoice and a certificate of completion identifying the exact product installed.
- Submit both to your carrier or agent. Send the rating certificate plus proof of installation; some carriers also request photos or a roofing certificate form.
- Confirm the credit on your declarations page. Check the next renewal’s declarations to verify the discount is applied and correct.
- Re-document after any roof change. If you replace or repair the roof, resubmit paperwork so the credit is not dropped at renewal.
The catch most guides skip: your deductible does not shrink
The Class 4 discount lowers your premium, not your claim payout. Most policies in hail-prone states carry a separate wind/hail deductible set as a percentage of dwelling value, commonly 1% to 2%, and that deductible still applies in full when you file a hail claim (carrier policy terms, 2025).
On a $400,000 dwelling, a 2% wind/hail deductible is $8,000 out of pocket per claim regardless of the discount. The premium credit and the deductible are two different levers: the discount saves money every year, while a Class 4 roof’s real payoff on a claim is that it is far less likely to need one. Weigh both when you compare a Class 4 roof to a standard roof, and read which roof types insurers reward before you buy.
Methodology and limits
This report synthesizes public sources: state insurance-department rules and statutes (Texas Department of Insurance 1998 hail-resistant roof rule; Code of Alabama Title 27 Chapter 31D; Louisiana Department of Insurance Regulation 136), the UL 2218 and FM 4473 impact standards, National Insurance Crime Bureau 2024 hail-claim counts, and public 2025 carrier statements on discount ranges. Discount percentages are ranges reported by carriers and roofing sources, not filed rate tables; actual credits vary by carrier, ZIP-level hail territory, roof, and policy, and legal mandates change. Verify any figure against your own carrier’s current filing and your state insurance department before relying on it. Nothing here is insurance advice.
For related analysis, see our reports on insurance non-renewal by roof age, how much a FORTIFIED roof costs, the gable vs hip roof insurance math, and how to identify hail damage on shingles.
Frequently asked questions
Which states require insurers to give an impact-resistant roof discount?
Texas is the clearest example, requiring insurers to offer a hail-resistant roof discount since 1998 (Texas Department of Insurance). Alabama requires a discount for FORTIFIED roofs under Title 27 Chapter 31D, and Louisiana is phasing in benchmarked FORTIFIED discounts by January 1, 2027. In most other states the discount is voluntary and set by each carrier, so it may or may not be available.
How much can a Class 4 shingle roof save on insurance?
Reported discounts run from about 5% to 35% off the premium, depending on carrier and state (carrier statements, 2025). The largest credits, near 30% to 35%, appear in high-hail states like Texas and Colorado, while low-hail coastal and northeastern states may offer little or nothing. FORTIFIED programs in Alabama and Mississippi can reach 55% off the wind portion of the premium specifically.
What documentation do I need to get the discount?
You generally need a manufacturer certificate showing the shingle’s UL 2218 or FM 4473 Class 4 rating, plus a paid invoice or roofing certificate of completion confirming the exact product installed. Submit both to your carrier or agent, then check your next declarations page to confirm the credit posted. Some carriers also request photos or a specific roofing certificate form.
Does a Class 4 roof lower my hurricane or hail deductible?
No. The discount reduces your ongoing premium, not the separate wind/hail deductible, which is commonly 1% to 2% of dwelling value and still applies to any claim (carrier policy terms, 2025). On a $400,000 home, a 2% deductible is $8,000 per claim regardless of the discount. The roof’s added value is that it is less likely to generate a claim at all.
What is the difference between UL 2218 and FM 4473?
Both rate roof impact resistance on a Class 1 to 4 scale, with Class 4 the highest. UL 2218 drops a 2-inch steel ball from 20 feet; FM 4473 fires ice balls up to 2 inches from an air cannon to more closely mimic hail. A shingle passes Class 4 if it shows no crack or split through the material. Most carriers accept a Class 4 rating under either standard for the discount.
Is a Class 4 roof worth it if my state has no mandated discount?
It can be, but the math changes. Without a mandated discount you depend on a voluntary carrier credit that may be small or unavailable, so the payback comes more from reduced claim frequency and longer roof life than from premium savings. In a frequent-hail state the combined discount and durability often justify the upgrade; in a low-hail region the premium savings alone rarely do.
Reviewed by The Roofing Brief Team. Last reviewed July 2026.