Skip to Content

Learning Center

Print page

Unit Statistical Report

Data, including losses and payroll by classification, resulting from every workers' compensation insurance policy written in California is reported to the WCIRB in a Unit Statistical Report (USR). These reports, submitted by your insurance company, are the source of the data used by the WCIRB to administer the Experience Rating System and to publish experience modifications.

USRs are reported at specific intervals defined in Part 4, Section I of the California Workers' Compensation Uniform Statistical Reporting Plan—1995  (Uniform Statistical Reporting Plan). When a worker is injured on the job and a workers' compensation claim file is opened, an estimate of the total claim value (present and future) is made by your insurer and is included on the next USR for your policy filed with the WCIRB. 

The first time a claim is valued for unit statistical reporting is 18 months after the policy inception month. This 18-month value is reported on a "first level" USR, which must be submitted to the WCIRB two months after the valuation date, or 20 months after the policy inception month. Claims that are still open as of the first report are required to be valued and reported again 12 months later (30-month valuation, due to the WCIRB at 32 months after the policy inception month) on a "second report." This process continues either until all claims are closed or for a total of 10 reports. Typically, only data contained in the first three reports is used for experience rating purposes.

Unit Statistical Reporting

Inception Date of Policy 18-Month USR Valuation 30-Month USR Valuation 42-Month USR Valuation 54-Month USR Valuation 66-Month USR Valuation ... 126-Month USR Valuation
Jan 2023 Jul 2024 Jul 2025 Jul 2026 Jul 2027 Jul 2028 ... Jul 2033
Feb 2023 Aug 2024 Aug 2025 Aug 2026 Aug 2027 Aug 2028 ... Aug  2033
Mar 2023 Sep 2024 Sep 2025 Sep 2026 Sep 2027 Sep 2028 ... Sep 2033
Apr 2023 Oct 2024 Oct 2025 Oct 2026 Oct 2027 Oct 2028 ... Oct 2033
May 2023 Nov 2024 Nov 2025 Nov 2026 Nov 2027 Nov 2028 ... Nov 2033
Jun 2023 Dec 2024 Dec 2025 Dec 2026 Dec 2027 Dec 2028 ... Dec 2033
July 2023 Jan 2025 Jan 2026 Jan 2027 Jan 2028 Jan 2029 ... Jan 2034
Aug 2023 Feb 2025 Feb 2026 Feb 2027 Feb 2028 Feb 2029 ... Feb 2034
Sep 2023 Mar 2025 Mar 2026 Mar 2027 Mar 2028 Mar 2029 ... Mar 2034
Oct 2023 Apr 2025 Apr 2026 Apr 2027 Apr 2028 Apr 2029 ... Apr 2034
Nov 2023 May 2025 May 2026 May 2027 May 2028 May 2029 ... May 2034
Dec 2023 Jun 2025 Jun  2026 Jun 2027 Jun 2028 Jun 2029 ... Jun 2034

We welcome your feedback on this guide. Please send comments and suggestions to marketing@wcirb.com.