Wisconsin Statutes Insurance (Ch. 600 to 655) § 625.11. Rate standards

(1) General. Rates shall not be excessive, inadequate or unfairly discriminatory, nor shall an insurer charge any rate which if continued will have or tend to have the effect of destroying competition or creating a monopoly.

(3) Inadequacy. Rates are inadequate if they are clearly insufficient, together with the investment income attributable to them, to sustain projected losses and expenses in the class of business to which they apply.

(4) Unfair discrimination. One rate is unfairly discriminatory in relation to another in the same class if it clearly fails to reflect equitably the differences in expected losses and expenses. Rates are not unfairly discriminatory because different premiums result for policyholders with like loss exposures but different expense factors, or like expense factors but different loss exposures, so long as the rates reflect the differences with reasonable accuracy. Rates are not unfairly discriminatory if they are averaged broadly among persons insured under a group, franchise or blanket policy.