Percentage deductibles: how a 2% deductible really works

A 2% deductible is 2% of the dwelling limit printed on your declarations page, not 2% of the claim and not 2% of what your house would sell for. With a $400,000 Coverage A limit, it is $8,000 whether the storm took off $10,000 of shingles or $200,000 of house. You pay that amount first on a covered loss of the type the deductible applies to, and the insurer pays the rest up to your limits.

The arithmetic is simple. The trouble is that people hear "2%" and picture a small number. On a typical coastal or hail-belt policy it is often the largest single sum you will have to find within weeks of a loss.

The formula, and what it is multiplied by

Dollar deductible = percentage x the limit the policy uses as its base. For most wind, hail and hurricane deductibles the base is Coverage A, the dwelling limit. The ISO windstorm or hail percentage deductible endorsement, HO 03 12, is built that way: the schedule says "we will deduct an amount equal to ___% of the limit of liability that applies to Coverage A - Dwelling" (the 1993 edition is reproduced by AAA Missouri; the 2011 edition multiplies the percentage by the Coverage A limit shown in the Declarations). Some earthquake policies use a different base. The California Earthquake Authority, for example, sets its 5% to 25% deductible on the combined Coverage A and B limit (CEA). Your own endorsement controls, so read the schedule.

Here is what the same percentages cost at different dwelling limits (all numbers are hypothetical):

Two consequences follow from the base being your limit. First, the deductible has nothing to do with how bad a particular storm was. Second, it moves when your limit moves. If an inflation guard clause or a limit increase at renewal lifts a $400,000 dwelling to $440,000, a 2% deductible quietly goes from $8,000 to $8,800. That is not an error, and it is also not announced in large type, so check the renewal declarations.

What happens to a claim

One deductible per loss, not one per coverage. The windstorm or hail endorsement applies the percentage to "the total of the loss for all Section I Property Coverages," and says no other deductible in the policy applies to that wind or hail loss. A single storm that damages the roof, the contents and the fence produces one subtraction.

Say your limit is $400,000, your wind/hail deductible is 2% ($8,000) and your flat deductible is $1,000. A hailstorm causes:

You owe $8,000 once, and the insurer pays $16,000. The $1,000 flat deductible does not also apply. In the ISO base form, if two deductibles could apply to the same loss, only the highest does.

With depreciation or an ACV roof

The deductible comes out of the first payment, and recoverable depreciation arrives later. Say a roof costs $22,000 to replace and the insurer assigns $9,000 of depreciation. With an $8,000 deductible, the first payment is $22,000 - $9,000 - $8,000 = $5,000. When you finish the work and submit invoices, the insurer releases the $9,000 holdback, and your total recovery is $14,000, which is the $22,000 cost less the $8,000 deductible. If your policy has a roof payment schedule or an actual-cash-value roof endorsement, the depreciation may never come back, and the percentage deductible then cuts into an already reduced payment. Both effects are covered in recoverable depreciation: getting the rest of your claim and Roof payment schedules and ACV roof endorsements.

When the loss is smaller than the deductible

A covered loss of $6,000 against an $8,000 deductible pays nothing. That sounds obvious, but it explains why homeowners with percentage deductibles frequently have damage nobody insures in practice: broken fence panels, a few missing shingles, a cracked window. Before you open a claim, get a contractor's estimate. The decision tools are in should you file a homeowners claim? and the Should I file a homeowners claim?.

Which perils carry one

A percentage deductible is not on every policy. It most commonly attaches to:

• Hurricane or named storm, with a trigger tied to storm status and timing. See hurricane and named-storm deductibles explained.
• Wind and hail, from any source, including thunderstorms and tornadoes, which is widespread in hail-prone areas. See wind and hail deductibles explained.
• Earthquake, almost always percentages set by the earthquake carrier or program. See earthquake deductibles: why they're so high.
• Wildfire, where an insurer uses a separate wildfire deductible. Fannie Mae's cap language contemplates one, but whether yours exists is on your declarations page.

Everything else, such as fire, theft, a burst pipe, usually falls under the flat all-other-perils deductible.

Why insurers use them

A flat $1,000 deductible means that when a hurricane crosses a coastline, the insurer pays almost every damaged roof from the first thousand dollars. A percentage deductible scales the homeowner's share with the value insured and removes the smaller claims from a catastrophe. In return, insurers can charge less for wind-exposed homes, and the III notes that in some high-risk coastal areas the percentage deductible is the only option offered. That is the trade: a lower premium bought with a larger bill in the year of the loss.

Rules that limit how high it goes

States and lenders set boundaries, which differ by place:

• Florida requires insurers to offer hurricane deductibles of $500, 2%, 5% and 10% of dwelling limits, subject to exceptions, and a policy under $500,000 cannot exceed 10% unless the policyholder hand-writes and signs a prescribed statement and any mortgagee approves (Fla. Stat. 627.701). See Florida.
• Rhode Island caps hurricane deductibles at 5% of Coverage A (230-RICR-20-05-13), and Maryland requires an insurer to file any standard that requires more than 5% of Coverage A at least 60 days ahead (Md. Ins. 19-209).
• Fannie Mae and Freddie Mac cap each required-peril deductible at 5% for one-to-four unit loans, as of their 2026 guides. A 10% option can disqualify a house from a conventional loan sold to either agency.

How to size yours

1. Convert each percentage on the declarations page to dollars. Do it for every one: hurricane, wind/hail, earthquake.
2. Compare that figure with the cash you could assemble in a month. A deductible you cannot pay is a policy that does not work.
3. Ask your agent for the premium at two or three percentages. The price of moving from 2% to 5% varies by insurer, house and location, so get actual quotes instead of guessing.
4. Divide the extra exposure by the annual savings. Say 5% instead of 2% on a $400,000 dwelling adds $12,000 of exposure; if it saves $600 a year, it takes 20 years to pay back. The hurricane and percentage deductible calculator handles this arithmetic.
5. Ask whether mitigation work, such as shutters or a better roof connection, cuts the percentage or the premium. See wind mitigation inspections and discounts.
6. Recheck after any limit change.

The wider case for and against raising deductibles is in should you raise your deductible to lower your premium?.

Key takeaways

• A percentage deductible is calculated on the limit named in your endorsement, usually Coverage A, not on the claim or the home's market value.
• You owe it once per loss, across all Section I coverages, and the higher of two applicable deductibles is the one that counts.
• It rises when your dwelling limit rises, so check it at each renewal.
• A covered loss smaller than the deductible pays nothing, and an ACV roof or unrecovered depreciation can shrink the payment further.
• Convert every percentage on your declarations page to dollars and decide whether you could fund it.