Washington Individual Retrospective Rating Plan Agreement (WA IGRP) is a type of workers' compensation insurance available to employers in the state of Washington. It is a rating plan in which employers purchase a basic level of insurance coverage and pay additional premiums based on their past claims experience. This is a flexible program that allows employers to manage their own workers' compensation costs. There are three types of WA IGRP Agreements: 1. Traditional Retrospective Rating Plan: This plan is based on the employer's actual claims experience over a three-year period, and the premium is adjusted accordingly. 2. Modified Retrospective Rating Plan: This plan is similar to the Traditional plan, but it is based on the employer's expected claims experience rather than actual claims. 3. Experience Rating Plan: This plan is based on the employer's actual claims experience over a five-year period. The premium is adjusted according to the employer's experience during the five-year period. WA IGRP Agreements are designed to give employers the flexibility to manage their own workers' compensation costs and control their own destiny.