Hurricane and Percentage Deductible Calculator

Many homeowners policies in coastal and storm-prone areas use a percentage deductible for hurricanes, named storms or wind and hail. This hurricane deductible calculator shows what that percentage means in real dollars, so the number is not a surprise after a storm. It also compares it with the flat deductible you pay on other claims.

How to use this calculator

1. Dwelling coverage. Find “Coverage A” or “Dwelling” on your declarations page. Most percentage deductibles are based on this limit.
2. Percentage deductible. Look on the same page, or in a hurricane or windstorm endorsement, for a line such as “Hurricane deductible: 2% of Coverage A.” It may be called a named storm, windstorm or wind and hail deductible.
3. Flat deductible. Enter the regular dollar deductible that applies to other covered losses, often called “all other perils.”
4. Read the results. You see the storm deductible in dollars and how much more it is than your flat deductible.

How this calculator works

A percentage deductible is a share of your dwelling coverage limit, not a share of the damage. The tool multiplies your dwelling coverage by the percentage to get the deductible in dollars. It then subtracts your flat deductible to show how much more you would pay for a storm loss than for other covered losses.

Deductible in dollars = Dwelling coverage × Percentage ÷ 100
Difference            = Deductible in dollars − Flat deductible

The default inputs ($350,000 of coverage, 2% and a $1,000 flat deductible) are hypothetical. The tool assumes the percentage applies to the dwelling limit and shows the deductible for one event. Whether it applies per storm, per season or per calendar year depends on your policy and state. Flood damage isn’t part of this check.

Worked examples

Example 1 (default inputs, hypothetical).

1. Deductible in dollars: $350,000 × 2 ÷ 100 = $7,000.
2. Difference: $7,000 − $1,000 = $6,000.

For a covered hurricane loss, this owner pays the first $7,000, which is $6,000 more than on a non-storm claim. If storm damage totals $5,000, the insurer pays nothing, because the loss is below the deductible.

Example 2 (a higher percentage, hypothetical). A home with $300,000 of dwelling coverage, a 5% hurricane deductible and a $1,000 flat deductible.

1. Deductible in dollars: $300,000 × 5 ÷ 100 = $15,000.
2. Difference: $15,000 − $1,000 = $14,000.

Even though this home has a lower limit, the higher percentage more than doubles the storm deductible compared with Example 1.

What your result means

Your result is the amount you should expect to cover yourself before a storm claim pays. Compare it with your savings. The table shows common percentages on the default $350,000 limit with a $1,000 flat deductible.

If the dollar amount is more than you could pay, ask your agent about a lower percentage and what it would cost. Then use the deductible break-even calculator to compare the quotes.

Rules that change the answer

• Florida. Insurers must offer hurricane deductible options of $500, 2%, 5% and 10% of the dwelling limit, with some exceptions for higher-value homes. The hurricane deductible applies once per calendar year for hurricane losses under the same insurer or group (Florida DFS).
• Trigger events. Some deductibles apply only to a named hurricane, others to any named storm or to all wind and hail. The NAIC explains that triggers vary by state and policy (NAIC).
• Texas coast. In parts of the Texas coast, a regular home policy may not include wind and hail coverage at all (TDI).
• Flood is separate. Storm surge and flooding are not covered by a standard homeowners policy; National Flood Insurance Program policies have their own deductibles and limits (FloodSmart).

Common mistakes

• Applying the percentage to the damage. It is a share of your coverage limit.
• Forgetting that a higher limit raises the deductible. Increasing Coverage A also increases a percentage deductible.
• Assuming the flat deductible applies to storms. Read which deductible applies to which peril.
• Not saving for it. A storm deductible can be several times your flat deductible.

Limits and when to get help

This tool can’t tell you which event triggers your deductible, how it applies across several storms or whether a loss is covered. Read your declarations page and ask your agent or insurer. Your state insurance department can explain local rules. See how deductibles work in our homeowners insurance coverage guide, and check your limit with the dwelling coverage estimator.