ISO endorsement · interline (shared across commercial lines)

IL 00 03 Calculation of Premium

Filings
645
latest Oct 22, 2026
Filing companies
164
80 carrier groups
States
45
including DC
Latest edition
09 08
Sep 2008

Coverage description

An Insurance Services Office (ISO) standard form. It states that the premium shown in the Declarations was based on rates in effect when the policy was issued, and that on each renewal, continuation or anniversary the premium will be computed using the insurer's rates and rules then in effect.

How the form has changed

The 09 07 and 09 08 editions update the list of coverage parts it applies to and the form date. The premium wording is the same.

Editions

Edition dates as filed, newest first. Filing counts include every state submission that lists the edition.

EditionFilingsCompaniesStatesFiled
09 08Sep 2008Latest63115944Nov 2021 to Oct 2026
09 07Sep 2007633Jun 2022 to Jun 2026
04 98Apr 1998322Aug 2025 to Mar 2026

5 other edition dates appear in one or two filings each, often carrier-specific versions: 12 19, 07 06, 00 03, 07 02, 09 98.

What the filings show

  • Edition in use: in the past 12 months, 66 companies filed the 09 08 edition and 1 company filed 09 07.
  • IL 00 21 (Nuclear Energy Liability Exclusion Endorsement) is filed alongside it most often, in 473 of the same filings (73%).

Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Oct 2026, excluding withdrawn and rejected filings.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 IL 00 03, out of 80 in total.

CarrierFilingsStatesEditions, most filed firstLast filed
Clear Blue Financial Group2 group companies filed it, led by Clear Blue Insurance Company and Rock Ridge Insurance Company753609 08Jun 17, 2026
OBS Holdings Group2 group companies filed it, led by Obsidian Insurance Company and Obsidian Pacific Insurance Company743709 08Apr 17, 2023
WCF Mutual Insurance Company Group2 group companies filed it, led by Associated Indemnity Corporation and WCF National Insurance Company351909 08Sep 25, 2026
Markel Corporation Group3 group companies filed it, led by State National Insurance Company, Inc. and Markel Insurance Company25409 08Oct 22, 2026
ACP Insurance Mgmt LLC GroupAccelerant National Insurance Company23409 08Dec 8, 2025
MS & AD Insurance Group3 group companies filed it, led by Transverse Insurance Company and Mitsui Sumitomo Insurance Company of America22709 08Sep 4, 2025
WR Berkley Corporation Group15 group companies filed it, led by Intrepid Casualty Company and StarNet Insurance Company20409 08Jun 19, 2026
Amtrust Financial Services Group9 group companies filed it, led by CorePointe Insurance Company and Milford Casualty Insurance Company18209 08Apr 10, 2025
Liberty Mutual Group3 group companies filed it, led by State Automobile Mutual Insurance Company and General Insurance Company of America16609 0804 98Jun 17, 2026
Church Mutual GroupChurch Mutual Insurance Company, S.I.15209 08Jun 26, 2026

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States

Number of filings that include IL 00 03 in each state, Oct 2021 to Oct 2026. Darker states have more filings.

Tennessee: 4 filingsTN4Alabama: 4 filingsAL4Florida: 0 filingsFLGeorgia: 4 filingsGA4Oklahoma: 7 filingsOK7South Carolina: 92 filingsSC92Arkansas: 5 filingsAR5Missouri: 5 filingsMO5Indiana: 5 filingsIN5Louisiana: 7 filingsLA7Ohio: 8 filingsOH8Wisconsin: 7 filingsWI7Texas: 2 filingsTX2Kentucky: 9 filingsKY9Iowa: 7 filingsIA7Kansas: 9 filingsKS9Mississippi: 9 filingsMS9North Carolina: 5 filingsNC5Nebraska: 5 filingsNE5South Dakota: 5 filingsSD5Montana: 11 filingsMT11New Hampshire: 0 filingsNHVirginia: 4 filingsVA4Arizona: 1 filingAZ1Pennsylvania: 3 filingsPA3Rhode Island: 4 filingsRI4Michigan: 0 filingsMIAlaska: 0 filingsAKDistrict of Columbia: 5 filingsDC5Idaho: 15 filingsID15Maryland: 6 filingsMD6West Virginia: 2 filingsWV2Utah: 15 filingsUT15Wyoming: 23 filingsWY23Delaware: 4 filingsDE4New Mexico: 8 filingsNM8Colorado: 138 filingsCO138Connecticut: 4 filingsCT4Maine: 4 filingsME4North Dakota: 4 filingsND4Illinois: 24 filingsIL24Minnesota: 0 filingsMNNew Jersey: 3 filingsNJ3New York: 0 filingsNYMassachusetts: 5 filingsMA5Washington: 16 filingsWA16Oregon: 10 filingsOR10Vermont: 2 filingsVT2California: 124 filingsCA124Nevada: 10 filingsNV10Hawaii: 1 filingHI1
FewerMore filingsNone

Often filed with

Standard-style form numbers that appear in the same filings most often.

  • IL 00 21Nuclear Energy Liability Exclusion Endorsement473 filings
  • IL 00 17Common Policy Conditions450 filings
  • IL 12 01Policy Changes288 filings
  • CA 04 44Waiver of Transfer of Rights of Recovery Against Others to Us (Waiver of Subrogation)240 filings
  • CA 20 48Designated Insured for Covered Autos Liability Coverage235 filings
  • CA 99 16Hired Autos Specified as Covered Autos You Own233 filings
  • CA 99 33Employees as Insureds233 filings
  • CA 23 05Wrong Delivery of Liquid Products228 filings
  • CA 04 49Primary and Noncontributory – Other Insurance Condition224 filings
  • CA 99 30Tapes, Records and Discs Coverage222 filings

Recent filings

Latest filings that include this form number. Filed copies open in FilingFocus.

SubmittedCompanyStateEditionsTracking number
Oct 22, 2026The Guarantee Company of North America USACA09 08SPRO-G135017985
Oct 22, 2026State National Insurance Company, Inc.CO09 08STNA-135128706
Oct 6, 2026American Casualty Company of Reading, Pennsylvaniaand 5 moreCA09 08CNAB-135091690
Sep 25, 2026Associated Indemnity CorporationUT09 08ADWC-135104118
Sep 4, 2026Incline Casualty CompanySC09 08AIAD-135047572
Aug 28, 2026Jet Insurance CompanySC09 08MRTN-134878222
Aug 24, 2026AXIS Insurance CompanyLA09 08AXSS-G135065365
Aug 17, 2026Mississippi Farm Bureau Casualty Insurance CompanyMS09 08SFBC-135017175
Aug 6, 2026The Guarantee Company of North America USASC09 08SPRO-G134890089
Jul 31, 2026The Guarantee Company of North America USASC09 08HADR-135038894
Jul 17, 2026Mississippi Farm Bureau Casualty Insurance CompanyMS09 08SFBC-134997156
Jul 16, 2026Southern Farm Bureau Casualty Insurance CompanyLA09 08SFBC-135019625

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