Coverage description
An Insurance Services Office (ISO) standard form. It applies a windstorm or hail deductible of 1%, 2% or 5% to covered property at scheduled premises, calculated separately for each damaged building and the personal property at each building.
How the form has changed
2 changes across 1 revision, newest first. Each edition is compared with the one before it, using wording from filed copies.
06 07 edition
Jun 2007, compared with 06 95The edition drops the wording that treated other covered weather damage as part of the windstorm or hail occurrence when it would not have happened but for the windstorm or hail.
06 95
“that loss or damage would not have occurred but for the Windstorm or Hail”
06 07
Removed
It adds that the endorsement gives no coverage for loss excluded by the Water Exclusion, and that a separate flood deductible applies when flood is covered.
06 95
Not in this edition
06 07
“a separate Flood Deductible applies to loss or damage attributable to Flood”
Editions
Edition dates as filed, newest first. Filing counts include every state submission that lists the edition.
| Edition | Filings | Companies | States | Filed |
|---|---|---|---|---|
| 10 12Oct 2012Latest | 159 | 54 | 41 | Nov 2021 to Oct 2026 |
| 06 07Jun 2007 | 5 | 4 | 5 | Feb 2022 to Jun 2023 |
| 06 95Jun 1995 | 6 | 3 | 5 | Dec 2022 to Aug 2025 |
What the filings show
- Edition in use: in the past 12 months, 5 companies filed the 10 12 edition.
- CP 00 30 (Business Income (and Extra Expense) Coverage Form) is filed alongside it most often, in 81 of the same filings (48%).
Filed under
Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Oct 2026, excluding withdrawn and rejected filings. One filing can cover several affiliated companies.
Carriers filing this form
The 10 carrier groups with the most filings that include CP 03 21, out of 32 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| Berkshire Hathaway Group4 group companies filed it, led by United States Liability Insurance Company and Mount Vernon Fire Insurance Company | 55 | 17 | 10 1206 07 | Aug 15, 2024 |
| American Family Insurance Group2 group companies filed it, led by Midvale Indemnity Company and Austin Mutual Insurance Company | 23 | 21 | 10 1206 07 | Oct 20, 2023 |
| Insurance Services Office, Inc.Advisory Organization | 22 | 21 | 10 12 | Aug 5, 2026 |
| Nationwide Corporation Group7 group companies filed it, led by Allied Insurance Company of America and Nationwide Agribusiness Insurance Company | 7 | 4 | 10 12 | Jun 15, 2023 |
| Pekin Insurance GroupPekin Insurance Company | 6 | 6 | 10 12 | May 5, 2025 |
| Trisura GroupTrisura Insurance Company | 6 | 4 | 10 12 | Jul 10, 2026 |
| Hastings Mutual Insurance Company | 5 | 5 | 10 12 | Oct 29, 2022 |
| Markel Corporation Group2 group companies filed it, led by State National Insurance Company, Inc. and Markel Insurance Company | 5 | 3 | 06 0710 12 | Jul 6, 2023 |
| ACP Insurance Mgmt LLC GroupAccelerant National Insurance Company | 4 | 2 | 10 12 | Mar 21, 2025 |
| Amtrust Financial Services Group9 group companies filed it, led by CorePointe Insurance Company and First Nonprofit Insurance Company | 4 | 1 | 10 12 | Feb 8, 2023 |
How the largest insurers handle CP 03 21
Groups among the largest commercial property insurers that filed CP 03 21 or their own version in the past five years.
- Berkshire Hathaway GroupUses CP 03 21 in 6 filings
- Liberty Mutual GroupFiles its own version: 1P0302FR Windstorm Or Hail Percentage Deductible (29 states)
See more forms
Search related forms, compare editions, and research carrier filings with FilingFocus.
States
Number of filings that include CP 03 21 in each state, Oct 2021 to Oct 2026. Darker states have more filings.
Often filed with
Standard-style form numbers that appear in the same filings most often.
- CP 00 30Business Income (and Extra Expense) Coverage Form81 filings
- CP 00 10Building and Personal Property Coverage Form80 filings
- CP 03 20Multiple Deductibles By Occurrence (Fixed Dollar Amount Deductibles)76 filings
- CP 10 36Limitations On Coverage For Roof Surfacing75 filings
- CP 12 18Loss Payable Provisions74 filings
- CP 00 18Condominium Commercial Unit-Owners Coverage Form72 filings
- CP 04 11Protective Safeguards71 filings
- CP 00 90Commercial Property Conditions70 filings
- CP 10 38Discharge From Sewer, Drain Or Sump (Not Flood-Related)68 filings
- CP 12 19Additional Insured - Building Owner68 filings
Recent filings
Latest filings that include this form number. Filed copies open in FilingFocus.
| Submitted | Company | State | Editions | Tracking number |
|---|---|---|---|---|
| Oct 1, 2026 | Property Insurance Association of Louisiana | LA | 10 12 | PIAL-135109319 |
| Aug 28, 2026 | Idaho Surveying and Rating Bureau, Inc. | ID | 10 12 | ISRB-135069700 |
| Aug 5, 2026 | Insurance Services Office, Inc. | GA | 10 12 | ISOF-135041740 |
| Aug 4, 2026 | Insurance Services Office, Inc. | PA | 10 12 | ISOF-135042310 |
| Aug 4, 2026 | Insurance Services Office, Inc. | VA | 10 12 | ISOF-135042311 |
| Jul 23, 2026 | Insurance Services Office, Inc. | TX | 10 12 | ISOF-135020902 |
| Jul 17, 2026 | Mississippi Farm Bureau Casualty Insurance Company | MS | 10 12 | SFBC-134997156 |
| Jul 10, 2026 | Trisura Insurance Company | WA | 10 12 | SHNF-134976660 |
| Jul 1, 2026 | Insurance Services Office, Inc. | MD | 10 12 | ISOF-135005339 |
| Jun 30, 2026 | Insurance Services Office, Inc. | ME | 10 12 | ISOF-135004700 |
| Jun 30, 2026 | Insurance Services Office, Inc. | SC | 10 12 | ISOF-135004703 |
| Jun 30, 2026 | Trisura Insurance Company | IL | 10 12 | SHNF-134983369 |
Most filed ISO CP forms
- CP 10 36 Limitations On Coverage For Roof Surfacing
- CP 12 19 Additional Insured - Building Owner
- CP 99 03 Cannabis Exclusion
- CP 10 75 Cyber Incident Exclusion
- CP 00 10 Building and Personal Property Coverage Form
- CP 00 30 Business Income (And Extra Expense) Coverage Form
- CP 12 18 Loss Payable Provisions
- CP 04 11 Protective Safeguards
- CP DS 00 Commercial Property Coverage Part Declarations Page
- CP 10 30 Causes of Loss - Special Form
- CP 03 20 Multiple Deductible Form
- CP 00 18 Condominium Commercial Unit-Owners Coverage Form
See more carrier forms
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