S.D. Codified Laws § 58-26-37
The director may require that reserves required by § 58-26-36 shall be equal to the unearned portions of the gross premiums in force after deducting applicable reinsurance in solvent insurers as computed on each respective risk from the policy's date of issue. If the director does not so require, the portions of the gross premium in force, less applicable reinsurance in solvent insurers, to be held as an unearned premium reserve, shall be computed according to the following table:
Term for which policy was written | Reserve for unearned premium | |
1 Year or less | 1/2 | |
2 Years | 1st Year | 3/4 |
2nd Year | 1/4 | |
3 Years | 1st Year | 5/6 |
2nd Year | 1/2 | |
3rd Year | 1/6 | |
4 Years | 1st Year | 7/8 |
2nd Year | 5/8 | |
3rd Year | 3/8 | |
4th Year | 1/8 | |
5 Years | 1st Year | 9/10 |
2nd Year | 7/10 | |
3rd Year | 1/2 | |
4th Year | 3/10 | |
5th Year | 1/10 | |
Over 5 Years | Pro Rata |
SDCL 58-26-37