S.D. Codified Laws § 58-34-40 (2026)
In computing the earned premiums for the purposes of § 58-34-39, the gross premium received by the insurer for the policy shall be used as a base, deducting therefrom solely charges not recurring upon the renewal or extension of the policy.
Source: SL 1966, ch 111 , ch 19, § 23 (3).