Coverage description
A National Council on Compensation Insurance (NCCI) standard form. It applies a retrospective rating plan over three years to this policy, the other policies listed with it, which can include general liability and auto, and their renewals, recalculating the premium from incurred losses between a minimum and a maximum.
Updated
What the form says
Key clauses from edition D, the latest revision, quoted as filed.
“and the renewals of each. The rating plan period is the three-year period”
WC 00 05 13 D
How long the plan runs. One retrospective premium covers three years, taking in this policy, the other scheduled policies and their renewals over that period.
“We may make interim calculations of retrospective rating plan premium for the first year and the first two years of the rating plan period.”
WC 00 05 13 D
Interim calculations. The insurer can calculate premium after the first year and after the first two years, each with losses valued six months after that period ends, before the regular calculations that follow the full three years.
“the standard premium for the rating plan period, increased pro rata to three years (1,095 days)”
WC 00 05 13 D
What ending the plan early costs. If the insurer cancels or does not renew for nonpayment, or you cancel or do not renew, the maximum premium is based on standard premium extended pro rata to a full three years. When you end it, a short rate minimum also applies, unless the work is completed, the business is sold or you retire from it.
“If aggregate limits of liability are stated above, they will apply separately to each annual period included in the three-year period.”
WC 00 05 13 D
How aggregate limits apply over three years. The schedule can cap the general liability and auto losses counted in the plan. Any aggregate limit entered there applies again for each year, not once for the whole three-year period.
How the form has changed
1 change across 1 revision, newest first. Each edition is compared with the one before it, using wording from filed copies.
Edition D
Compared with edition CLatest editionLists a net aggregate loss factor, in place of an insurance charge, among the costs the basic premium factor includes, alongside general administration and loss control costs.
Edition C
“Insurance charge”
Edition D
“Net aggregate loss factor”
Editions
Revision letters as filed, newest first. Filing counts include every state submission that lists the edition.
What the filings show
- Edition in use: in the past 12 months, 9 companies filed edition D and 9 companies filed edition C.
- WC 00 05 03 (Retrospective Rating Plan Premium Endorsement One-Year Plan) is filed alongside it most often, in 73 of the same filings (100%).
Filed under
Data from admitted P&C filings with state insurance departments, submitted Nov 2021 to Aug 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 WC 00 05 13, out of 18 in total.
| Carrier | Filings | States | Editions, most filed first | Last filed |
|---|---|---|---|---|
| Brookfield Wealth Solutions Group4 group companies filed it, led by Argonaut Insurance Company and Argonaut-Midwest Insurance Company | 19 | 1 | D | Jun 4, 2026 |
| AXA Insurance Group5 group companies filed it, led by Greenwich Insurance Company and XL Insurance America, Inc. | 6 | 2 | BD | Jun 23, 2026 |
| Sompo Group2 group companies filed it, led by Sompo America Fire and Marine Insurance Company and Sompo America Insurance Company | 6 | 2 | D | Jun 15, 2026 |
| RLI Insurance GroupRLI Insurance Company | 5 | 1 | D | Aug 18, 2026 |
| THE Hanover Insurance Group6 group companies filed it, led by Allmerica Financial Alliance Insurance Company and Allmerica Financial Benefit Insurance Company | 5 | 1 | C | Jun 23, 2026 |
| Arch Insurance Group2 group companies filed it, led by Arch Indemnity Insurance Company and Arch Insurance Company | 4 | 1 | D | Apr 8, 2026 |
| Louisiana Workers Compensation GroupPrescient National Insurance Company | 4 | 1 | D | Jul 2, 2025 |
| Tokio Marine Holdings Incorporated Group2 group companies filed it, led by Safety First Insurance Company and Safety National Casualty Corporation | 4 | 1 | D | May 14, 2025 |
| American Financial Group4 group companies filed it, led by Great American Alliance Insurance Company and Great American Assurance Company | 3 | 1 | C | Jun 11, 2024 |
| Liberty Mutual Group6 group companies filed it, led by Employers Insurance Company of Wausau and LM Insurance Corporation | 3 | 3 | D | Mar 21, 2022 |
States
Number of filings that include WC 00 05 13 in each state, Nov 2021 to Aug 2026. Darker states have more filings.
Often filed with
Standard-style form numbers that appear in the same filings most often.
- WC 00 05 03Retrospective Rating Plan Premium Endorsement One-Year Plan73 filings
- WC 00 05 04Retrospective Rating Plan Premium Endorsement Three-Year Plan73 filings
- WC 00 05 05Retrospective Rating Plan Premium Endorsement Wrap-Up Construction Project73 filings
- WC 00 05 12Retrospective Rating Plan Premium Endorsement One- Year Plan—multiplelines73 filings
- WC 00 05 14Retrospective Rating Plan Premium Endorsement Wrap- Up Constructionproje Ct—multiple Lines72 filings
- WC 00 00 01Information Page70 filings
- WC 00 05 09Retrospective Premium Endorsement-- Changes70 filings
- WC 00 05 11Retrospective Premium Endorsement-- Short Form70 filings
- WC 00 05 15Retrospective Rating Plan Premium Endorsement-- Flexibility Options70 filings
- WC 00 01 01Defense Base Act Coverage Endorsement69 filings
Recent filings
Latest filings that include this form number. Filed copies open in FilingFocus.
| Submitted | Company | State | Editions | Tracking number |
|---|---|---|---|---|
| Aug 18, 2026 | RLI Insurance Company | CO | D | RLSC-135057018 |
| Jun 23, 2026 | Allmerica Financial Alliance Insurance Companyand 5 more | CO | C | HNVX-134968029 |
| Jun 23, 2026 | AXA XL Insurance Company Americasand 3 more | CO | B | XLAM-134996276 |
| Jun 15, 2026 | Sompo America Fire and Marine Insurance Companyand 1 more | CO | D | SMPJ-134970923 |
| Jun 4, 2026 | Argonaut-Midwest Insurance Company | CO | D | ARGN-134974739 |
| Jun 4, 2026 | Argonaut Insurance Company | CO | D | ARGN-134974742 |
| Jun 4, 2026 | Rockwood Casualty Insurance Company | CO | D | ARGN-134974764 |
| Apr 8, 2026 | Arch Insurance Company | CO | D | AICO-G134902631 |
| Apr 8, 2026 | Arch Indemnity Insurance Company | CO | D | AICO-G134902710 |
| Jan 8, 2026 | The Cincinnati Casualty Companyand 2 more | NY | C | CNNA-134764673 |
| Dec 3, 2025 | AXA XL Insurance Company Americas | KY | D | XLAM-134756293 |
| Sep 12, 2025 | Pinnacle National Insurance Company | AZ | D | STNA-134669602 |
Most filed NCCI WC forms
- WC 00 00 01 Information Page
- WC 00 04 19 Part Five, Premium Amendatory Endorsement
- WC 00 00 00 Workers Compensation and Employers Liability Insurance Policy
- WC 00 04 21 Catastrophe (Other Than Certified Acts of Terrorism) Premium Endorsement
- WC 00 04 06 Premium Discount Endorsement
- WC 00 03 13 Waiver of Our Right to Recover From Others Endorsement
- WC 00 04 22 Terrorism Risk Insurance Program Reauthorization Act Disclosure Endorsement
- WC 00 03 08 Partners, Officers and Others Exclusion Endorsement
- WC 00 03 03 Employers Liability Coverage Endorsement
- WC 00 03 11 Voluntary Compensation and Employers Liability Coverage Endorsement
- WC 00 04 03 Experience Rating Modification Factor Endorsement
- WC 00 04 04 Pending Rate Change Endorsement