Forms and Publications



Electronic Report Resources Retro Premium Calculator
  • Current Retro Premium Calculator, updated October 2022; this applies to coverage periods beginning July 1, 2017 and later. This calculator assists in projecting future retro performance (though projections are not guaranteed). Please email us with any questions about the calculator.
  • Retro Premium Calculator, updated July 2017. This premium calculator is meant to be used only for coverage periods from July 2014 through April 2017. Unlike the current premium calculator above, this calculator does not reflect subsequent changes to the Retro insurance tables and single loss limit program rules.
Retro Program Rules

The rules governing Retrospective Rating can be found in the Washington Administrative Code (WAC):

2023 Rulemaking - Insurance Tables Updates

The Retrospective Rating Program (Retro) is undertaking rulemaking to update its insurance tables in accordance with WAC 296-17B-010. The intent of the insurance table review is to ensure fairness and equity in the distribution of retrospective rating adjustments. The last update to Retro’s insurance tables occurred in 2017.

The L&I actuaries have completed their review of the insurance tables which have subsequently been independently reviewed by an outside actuarial firm, Oliver Wyman.

This current rulemaking has an anticipated effective date of October 1, 2023.

Helpful Resources:

Proposed Insurance Tables Testing:

    Calendar of dates and deadlines affecting Retro participants

    Significant dates and deadlines, as well as the schedule of Retro reports, can be found in our annual Retro dates and deadlines calendar.

    Retrospective rating newsletter

    Subscribers to the L&I Retro News mailing list will typically receive 6–8 messages a month, with news, updates, and information about issues affecting Retro participants. Sign up here to receive our email bulletins.