RCW 48.29.143: Premium rates—Actuarially sound estimates.

(1) Premium rates for the insuring or guaranteeing of titles shall not be excessive, inadequate, or unfairly discriminatory.

(2) A rate is not excessive, inadequate, or unfairly discriminatory if it is an actuarially sound estimate of the expected value of all future costs associated with an individual risk transfer. Such costs include claims, claim settlement expenses, operational and administrative expenses, and the cost of capital.